identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
AB6887832B28FFF8FC3CFA27FDC34F75.text	AB6887832B28FFF8FC3CFA27FDC34F75.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Kobayasiella parasubtilissima (Kobayasi & Nagumo) Lange-Bertalot 1999	<div><p>Kobayasiella parasubtilissima (Kobayasi &amp; Nagumo) Lange-Bertalot</p><p>(Figs 2 A-P; 4 A-H)</p><p>Iconographia Diatomologica 6: 268 (Lange-Bertalot 1999). — Navicula parasubtilissima Kobayasi &amp; Nagumo, The Botanical Magazine, Tokyo 101 (1063): 245 (Kobayasi &amp; Nagumo 1988).</p><p>ECOLOGY AND DISTRIBUTION. — Kobayasiella parasubtilissima was found in ten lakes. A rare species, with a mean relative abundance of 0.2% and a maximum of 5.5% in Lake 16-H. Although rare, this species was more abundant in acidic conditions (Appendix 3) with a pH optimum of 5.7 and a relatively high DOC optimum of 6.9 mg /L (Appendix 2). Camburn &amp; Charles (2000), Fallu et al. (2000), and Siver &amp; Hamilton (2011) all reported this taxon from low alkalinity, low pH waters across eastern North America. Siver et al. (2005) and Bahls (2012b) also observed this taxon with a mixed population of more than one species from western North America. Kobayasiella parasubtilissima has also been reported from Europe, suggesting that this is a globally distributed species.</p><p>DESCRIPTION</p><p>The frustules exhibit a rectangular and narrow shape in girdle view. The valves are narrow, ranging from linear to linear-lanceolate, with capitate ends. Based on a sample size of 21, the valve dimensions vary, with a length ranging from 27 to 33.5 µm and a width ranging from 3.5 to 5 µm. The length-to-width ratio is 6.5 to 7.0. The stria density ranges from 45 to 50 in 10 µm. The axial area is linear to lanceolate and narrow. The central area is weakly linear-elliptic, exhibiting 7-8 marginal striae of varying lengths. The valve face is flat. The raphe is linear, with a distinct kink-like irregularity occurring halfway between the mid-valve and apex (Fig. 4A). The central raphe fissures are widely spaced, linearly expanded, and rounded. The terminal raphe fissures are weakly curved on the valve face, opening with an external linear to funnel-like groove (Fig. 4A, G). Internally, the raphe is situated on a thickened sternum, appearing straight without a kink-like regularity. The proximal raphe fissures are T-shaped depressions, while the terminal fissures end on elongated helictoglossae, isolated from the apex mantle (Fig. 4F, E, H). The striae exhibit a radial pattern at the mid-valve and become strongly convergent towards the apices (Fig. 4B). From the mid-valve to the Voigt fault, the individual striae become straight to bent, while from the Voigt fault to the apex, they change from bent to straight. The striae possess 4-6 (sometimes 9) rows of pores. The striae are interrupted by a hyaline valve face/ mantle margin along the valve sides and extend uninterrupted around the apices. Distinct Voigt faults can be observed on both the primary and secondary sides of the valve, located at 2/3 of the distance between the mid-valve and apex. The striae are covered with 4-6 (sometimes more) rows of small multiseriate pores. Internally, the multiseriate pores are positioned between thickened virgae. Small silica projections from the virgae may or may not be present. The cingulum features 3-4 open copulae bands, with the copulae exhibiting two linear rows of pores at the pars interior. Additionally, a velum-like cover with 6-8 openings covers the pores. Occasionally, a fringe can be observed at the base of a copula.</p><p>Specimens from Tursujuq National Park match specimens from the original publication of Kobayasi &amp; Nagumo (1988) with the characteristic linear narrow valves with capitate ends and a length to width ratio between 6.5 and 7.0. Populations in Tursujuq National Park were at the larger end of the described size range, with slightly wider valves (up to 5 µm) and a higher stria density (up to 50 in 10 µm) when including irregular smaller striae along the valve margin.</p></div>	https://treatment.plazi.org/id/AB6887832B28FFF8FC3CFA27FDC34F75	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Alibert, Marie;Hamilton, Paul B.;Pienitz, Reinhard;Antoniades, Dermot	Alibert, Marie, Hamilton, Paul B., Pienitz, Reinhard, Antoniades, Dermot (2023): Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec. Cryptogamie, Algologie 20 (9): 157-187, DOI: 10.5252/cryptogamie-algologie2023v44a9, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/algologie2023v44a9.pdf
AB6887832B2AFFF4FF54F8CDFCB74A09.text	AB6887832B2AFFF4FF54F8CDFCB74A09.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Kobayasiella madumensis (Jorgensen) Lange-Bertalot 1999	<div><p>Kobayasiella madumensis (JØrgensen) Lange-Bertalot</p><p>(Figs 2 Q-AB; 5 A-G)</p><p>Iconographia Diatomologica 6: 267 (Lange-Bertalot 1999). — Navicula madumensis JØrgensen, Det Kongelige Danske Videnskabernes Selskab, Biologiske Shrifter 5 (2): 60 (JØrgensen 1948). — Kobayasia madumensis (JØrgensen) Lange-Bertalot, Iconographia Diatomologica 4: 282 (Lange-Bertalot 1996).</p><p>ECOLOGY AND DISTRIBUTION. — Kobayasiella madumensis was found in four lakes in this study, never exceeded 1% relative abundance and had no evident ecological preferences. In North America, Camburn &amp; Charles (2000), Metzeltin &amp; Lange-Bertalot (2007) and Siver &amp; Hamilton (2005) reported this species in low alkaline and low pH lakes from the eastern part of the continent.</p><p>DESCRIPTION</p><p>The frustules have a rectangular and narrow shape in girdle view. The valves are linear-elliptic with more or less capitate protruding ends. Based on a sample size of 15, the valve dimensions range from a length of 29.5 to 37 µm and a width of 5.5 to 7 µm, with the length-to-width ratio from 4.8 to 5.5 µm. The stria density ranges from 37 to 40 in 10 µm. The axial area is lanceolate and narrow, and in LM, it is almost indistinct. The central area is small and apically linear-elliptic, with 9-10 marginal striae of varying lengths aligned between the proximal raphe ends. The external valve face is flat. The raphe is linear, with a kink-like irregularity halfway between the mid-valve and apex. Externally, the central raphe fissures are linearly expanded, with a teardrop-shaped proximal fissure. The terminal raphe fissures are bent but not hooked, directed towards the secondary side of the valve (Fig. 5F). There is a slightly raised terminal nodule with a terminal axial area. Internally, the raphe is located on a thickened sternum and appears straight, without a kink-like irregularity. The proximal raphe fissures are close together, small, and Y-shaped to T-shaped, with surrounding ridges on the sternum (Fig. 5D, E). The terminal fissures end on raised elongated helictoglossae, isolated from the apex mantle (Fig. 5G). The striae are strongly radiate at the mid-valve and become strongly convergent at the apices. From the mid-valve to the Voigt fault, the individual striae change from straight to bent, and from the Voigt fault to the apex, the striae change from bent to straight. The mantle striae are interrupted by a thick hyaline ridge at the valve face/mantle junction and are not continuous around the apices (Fig. 5F). Distinct Voigt faults are present on both the primary and secondary sides of the valve, located at 2/3 of the distance between the mid-valve and apex. Externally, the striae are covered with two rows of small pores. Internally, the biseriate pores are positioned between thickened virgae. Additionally, the striae around the central area are narrow and transapically elongated.</p><p>The broader linear-elliptic valve with capitate ends distinguishes this taxon from most Kobayasiella species including truly broad taxa such as K. lange-bertalotii Metzeltin and K. krasskei Metzeltin &amp; Lange-Bertalot. A closely related valve form includes K. subtilissima sensu Germain (1981; not K. subtilissima sensu stricto), however distinct differences between the Germain specimen and K. madumensis are evident with a smaller distance between the central raphe ends and no expanded central area. Kobayasiella pseudosubtilissima (Manguin) Lange-Bertalot is similar in outline, but K. madumensis is distinguished from the former taxon by the small, less curved terminal raphe fissures, the capitate (not rostrate) ends and the higher stria density (37-40 vs 30-32 in 10 µm). JØrgensen first documented a lanceolate taxon with head-shaped extremities ( K. madumensis) from Madum SØ, Denmark. The original line drawing does not match the current concept of the species, which was established using the examination of type-prep material collected by JØrgensen (HER Nr. 69) (Lange-Bertalot 1996). In this examination Lange-Bertalot reports a linear-elliptic valve similar to that observed in North America. Siver et al. (2005) illustrate LM and SEM of K. madumensis specimens from Cape Cod (United States) that match specimens from Tursujuq National Park.</p></div>	https://treatment.plazi.org/id/AB6887832B2AFFF4FF54F8CDFCB74A09	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Alibert, Marie;Hamilton, Paul B.;Pienitz, Reinhard;Antoniades, Dermot	Alibert, Marie, Hamilton, Paul B., Pienitz, Reinhard, Antoniades, Dermot (2023): Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec. Cryptogamie, Algologie 20 (9): 157-187, DOI: 10.5252/cryptogamie-algologie2023v44a9, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/algologie2023v44a9.pdf
AB6887832B26FFF4FF32FD20FAF94B76.text	AB6887832B26FFF4FF32FD20FAF94B76.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Kobayasiella subtilissima (Cleve) Lange-Bertalot	<div><p>Kobayasiella subtilissima (Cleve) Lange-Bertalot</p><p>(Figs 2 AC-AO; 6 A-F)</p><p>Iconographia Diatomologica 6: 268 (Lange-Bertalot 1999). — Navicula subtilissima Cleve, Actas Societas Pro Fauna et Flora Fennica 8 (2): 37 (Cleve 1891).</p><p>ECOLOGY AND DISTRIBUTION. — Kobayasiella subtilissima was found in 29 lakes in this study. However, it was present in low relative abundances (mean 1.1%) with a maximum of 10.7% in Lake 18-R. This species was more common in acidic conditions (Appendix 3) with a pH optimum of 6.2 and a relatively low DIC optimum of 0.76 mg /L (Appendix 4). A globally distributed species under consistent environmental conditions.</p><p>DESCRIPTION</p><p>The frustules are rectangular and narrow in girdle view. The valves exhibit a linear-elliptic to linear-lanceolate shape with subcapitate to capitate ends. Based on a sample size of 22, the valve dimensions range from a length of 25 to 32.5 µm and a width of 5.5 to 6.5 µm. The length-to-width ratio is 4.3 to 5.0.The stria density ranges from 36 to 40 in 10 µm. The external valve face is slightly recessed around the central area. The axial area is linear to lanceolate and narrow. The central area is an expanded axial area, small and round to elliptic, with 6-7 marginal striae oriented between widely spaced proximal raphe fissures. The raphe is linear, with a sharp kink-like irregularity closer to the mid-valve than the apex (Fig. 6A). Externally, the central raphe fissures are linearly expanded with rounded ends. The terminal raphe fissures are bent and deflected on the valve face to one side, opening with an external linear to funnel-like groove (Fig. 6E). Internally, the raphe is located on a thickened sternum and appears straight, without a kink-like irregularity (Fig. 6B). The proximal raphe fissures are T-shaped and located on an elevated central nodule, while the terminal fissures end on elongated helictoglossae, isolated from the apex mantle (Fig. 6D, F). The striae are radiate at the mid-valve and become strongly convergent at the apices. From the mid-valve to the Voigt fault, the striae are flexed, and from the Voigt fault to the apex, the striae change from being flexed to straight. The mantle striae are interrupted by a hyaline ridge at the valve face/mantle junction and are continuous around the apices (Fig. 6E, F). Distinct Voigt faults are present on the secondary side of the valve, located at 2/3 of the distance between the mid-valve and apex (Fig. 6F). The striae are not continuous and are interrupted by thickened vimenes along an apical orientation, except at the apices. The striae are covered with 4-6 rows of small multiseriate pores. Internally, the multiseriate pores are positioned between thickened virgae.</p><p>The linear-elliptic to linear-lanceolate with subcapitate to capitate shape and size of K. subtilissima matches K. neocaledonica Moser, Metzeltin &amp; Lange-Bertalot, and K. krasskei Metzeltin &amp; Lange-Bertalot, but the formation of the valve ends, and the central area are different.The interruption of the striae with vimenes between virgae (akin to Brachysira Kützing) is distinct for this species which should be compared to Kobayasiella odakae (Skvortzov) Lange-Bertalot with a similar structural formation. Kobayasiella subtilissima is distinguished from K. odakae by a smaller valve surface depression around the central area, the presence of small projections off the virgae, and the more random disruption of the striae.</p></div>	https://treatment.plazi.org/id/AB6887832B26FFF4FF32FD20FAF94B76	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Alibert, Marie;Hamilton, Paul B.;Pienitz, Reinhard;Antoniades, Dermot	Alibert, Marie, Hamilton, Paul B., Pienitz, Reinhard, Antoniades, Dermot (2023): Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec. Cryptogamie, Algologie 20 (9): 157-187, DOI: 10.5252/cryptogamie-algologie2023v44a9, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/algologie2023v44a9.pdf
AB6887832B26FFF2FC40FCC1FDA34F92.text	AB6887832B26FFF2FC40FCC1FDA34F92.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Kobayasiella tursujuqensis Alibert & Hamilton & Pienitz & Antoniades 2023	<div><p>Kobayasiella tursujuqensis sp. nov.</p><p>(Figs 3 A-J; 7 A-F)</p><p>HOLOTYPE. — Canada. Québec, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-74.07305&amp;materialsCitation.latitude=56.252777" title="Search Plazi for locations around (long -74.07305/lat 56.252777)">Lake</a> 16-H, 56°15’10”N, 74°4’23”W, 256 m a.s.l., 16.VIII.2015, D. Antoniades (microscope slide designated as the holotype, holo-, CANA [CANA 129458]).</p><p>ISOTYPE. — Canada. Québec, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-74.07305&amp;materialsCitation.latitude=56.252777" title="Search Plazi for locations around (long -74.07305/lat 56.252777)">Lake</a> 16-H, 56°15’10”N, 74°4’23”W, 256 m a.s.l., 16.VIII.2015, D. Antoniades (iso-, ANSP [ANSP-GC68067]) .</p><p>TYPE LOCALITY. — Canada. Québec, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-74.07305&amp;materialsCitation.latitude=56.252777" title="Search Plazi for locations around (long -74.07305/lat 56.252777)">Lake</a> 16-H, 56°15’10”N, 74°4’23”W, 256 m a.s.l.</p><p>ETYMOLOGY. —The epithet ‘tursujuqensis’ is named in recognition of Tursujuq National Park.</p><p>ECOLOGY AND DISTRIBUTION. — Kobayasiella tursujuqensis sp. nov. was found in eight lakes. The species was present in low relative abundances (mean 0.3%) with a maximum of 5.5% in Lake 16-H. No environmental distribution pattern can be distinguished related to water chemistry. However, this species seems to be more abundant in acidic waters (Appendix 3), with a pH optimum of 5.87, and in low specific conductivities (Appendix 1).</p><p>REGISTRATION. — http://phycobank.org/103918.</p><p>DESCRIPTION</p><p>Frustules rectangular and narrow in girdle view. Valves small, linear to linear-lanceolate with subrostrate to subcapitate apices. Valve dimensions (n =12): length 17-19 µm, width 3-4 µm and striae 42-48 in 10 µm (SEM measurement).External valve face flat. Axial area linear to lanceolate and narrow. Central area absent, with 7-8 striae orientated between proximal raphe fissures. Raphe linear, with kink-like irregularity halfway between mid-valve and apex (Fig. 7A); externally, central raphe fissures widely spaced, linear expanded with rounded ends. Terminal raphe fissures curved,deflected,not hooked,to secondary side of valve opening with an external elliptic to funnel-like depression (Fig. 7D). Internally, raphe on a thickened sternum, straight, with no kink-like regularity. Proximal raphe fissures T-shaped and elevated on a central nodule (Fig.7F).Terminal fissures end on elongated helictoglossae, isolated from apex mantle (Fig.7E). Striae strongly radiate at mid-valve to strongly convergent at apices.A thickened valve margin separates valve face striae from mantle striae. From mid-valve to Voigt fault striae change from straight to flexed halfway between axial area and valve margin; from Voigt fault to apex striae change from flexed to straight. Mantle striae separated by thick hyaline ridge at valve face/mantle junction and not continuous around apices. Externally, striae sometimes expanded around central area, occluded with4-8 rows of pores.Distinct Voigt faults on primary and secondary side of valve at 2/3 distance between mid-valve to apex (Fig. 7D). Internally, multiseriate pores positioned between thickened virgae. This taxon is similar in valve outline to K. parasubtilissima but smaller, the apices are rostrate to subcapitate (not capitate as in K. parasubtilissima), the central raphe ends are closer together, the external terminal fissures are more hook-like with a larger grooved opening on the external face, and the internal virgae do not have silica projections into the striae. Finally, in some specimens the width of individual striae may vary, even forming bulbous expansions (Fig. 6C) around the central area. Other less similar unknown taxa for comparison include Kobayasiella species Nr 94/6-9 (?nov.) and Kobayasiella species Nr 94/6-9 (?nov.) from the Krasske material collected from Brazil (Metzeltin &amp; Lange-Bertalot 1998). The current described size range of 17-19 µm is likely not the complete range, which is yet to be determined.</p></div>	https://treatment.plazi.org/id/AB6887832B26FFF2FC40FCC1FDA34F92	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Alibert, Marie;Hamilton, Paul B.;Pienitz, Reinhard;Antoniades, Dermot	Alibert, Marie, Hamilton, Paul B., Pienitz, Reinhard, Antoniades, Dermot (2023): Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec. Cryptogamie, Algologie 20 (9): 157-187, DOI: 10.5252/cryptogamie-algologie2023v44a9, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/algologie2023v44a9.pdf
AB6887832B20FFF0FC2BF944FECB4ED7.text	AB6887832B20FFF0FC2BF944FECB4ED7.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Kobayasiella pseudostauron (Lange-Bertalot) Lange-Bertalot	<div><p>Kobayasiella pseudostauron (Lange-Bertalot) Lange-Bertalot</p><p>(Figs 3 K-T; 8 A-G)</p><p>Iconographia Diatomologica 6: 272-275 (Lange-Bertalot 1999). — Naviculadicta pseudostauron Lange-Bertalot in Lange-Bertalot &amp; Metzeltin, Iconographia Diatomologica 2: 87-88 (Lange-Bertalot &amp; Metzeltin 1996).</p><p>ECOLOGY AND DISTRIBUTION. — Kobayasiella pseudostauron was commonly observed but not abundant in Tursujuq National Park, where it was found in 26 lakes with a mean relative abundance of 0.5% and a maximum abundance of 2.9% in lakes T2-D and 18-W. No clear autecological patterns were distinguishable. This species was found in circumneutral waters, with a pH optimum of 6.56 (Appendix 3). The type locality for this species is Julma-Ölkyy (Finland), which shows similar water conditions to those of Tursujuq Park: oligotrophic and weakly alkaline. Kobayasiella pseudostauron has a circumpolar distribution.</p><p>DESCRIPTION</p><p>The frustules are rectangular and narrow in girdle view. The valves exhibit a linear to linear-lanceolate shape with subrostrate to subcapitate to capitate protruding ends. Based on a sample size of 12, the valve dimensions range from a length of 19 to 22.5 µm and a width of 3.5 to 4.0 µm. The stria density is 38-40 in 10 µm. The external valve face is flat. The axial area is linear to lanceolate and narrow. The central area is a large rectangular to stauros-fascia, which may or may not have small marginal striae (Fig. 8A, C, D). The raphe is linear, with a kink-like irregularity halfway between the mid-valve and apex (Fig. 8A, B). Externally, the central raphe fissures are widely spaced and exhibit a linear expansion with indistinct rounded ends (Fig. 8C, D). The terminal raphe fissures are curved, deflected, not hooked, and located on the secondary side of the valve opening, with an external elliptic to funnel-like depression (Fig. 8E, F). Internally, the raphe is located on a thickened sternum and appears straight, without a kink-like irregularity (Fig. 8G). The proximal raphe fissures are T-shaped, and the terminal fissures end on small elevated helictoglossae, isolated from the apex mantle (Fig. 8G). The striae are strongly radiate at the mid-valve and become strongly convergent at the apices, with four to six rows of pores per stria. A thickened valve margin separates the striae on the valve face from the striae on the mantle. From the mid-valve to the Voigt fault, the striae became straight to flexed halfway between the axial area and valve margin. From the Voigt fault to the apex, the striae became flexed to straight. Distinct Voigt faults are present on both the primary and secondary sides of the valve, located at 2/3 of the distance between the mid-valve and apex (Fig. 8E, G). The striae on the mantle are reduced and continuous around the apices. The striae are covered with four to six rows of small multiseriate pores. Internally, the pores are positioned between thickened virgae ribs.</p><p>The specimens of Kobayasiella pseudostauron fromTursujuq National Park are at the bottom of the size range, with slightly smaller (19-22.5 vs 20-24 µm) and narrower (3.5-4.0 vs 4.0- 4.7 µm) valves compared to specimens from the type locality. Some of the LM images from the type description have visible striae (e.g. Lange-Bertalot &amp; Metzeltin 1996: pl. 35, figs 11, 13) which may suggest that this taxon has a wider stria range than reported (37-39 in 10 µm). The SEM internal views of the central area and the capitate ends match our SEM images. Kobayasiella pseudostauron is similar to K. jaagii (F.Meister) Lange-Bertalot:two small Kobayasiella taxa with a large central area or fascia. Kobayasiella jaagii is a larger species (24-27 vs 19-24 µm) and broader (5 µm vs 3.5-4.5 µm) with a lower stria density. Furthermore, K. jaagii has rostrate apices while K. pseudostauron has subcapitate to capitate apices and a full stauros-like central fascia. Specimens identified as K. jaagii from western North America are larger than the original description and bluntly rostrate, compared to the attenuated rostrate apices of K. jaagii in the original drawing of Meister (Bahls 2013), which is in line with the broader concept of the species presented by Germain (1981) and Krammer &amp; Lange-Bertalot (1986).</p></div>	https://treatment.plazi.org/id/AB6887832B20FFF0FC2BF944FECB4ED7	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Alibert, Marie;Hamilton, Paul B.;Pienitz, Reinhard;Antoniades, Dermot	Alibert, Marie, Hamilton, Paul B., Pienitz, Reinhard, Antoniades, Dermot (2023): Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec. Cryptogamie, Algologie 20 (9): 157-187, DOI: 10.5252/cryptogamie-algologie2023v44a9, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/algologie2023v44a9.pdf
AB6887832B22FFEFFF6DF961FEF94F95.text	AB6887832B22FFEFFF6DF961FEF94F95.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Kobayasiella micropunctata (Germain) Lange-Bertalot 1999	<div><p>Kobayasiella micropunctata (Germain) Lange-Bertalot</p><p>(Figs 3 U-AM; 9 A-F)</p><p>Iconographia Diatomologica 6: 267 (Lange-Bertalot 1999). — Navicula subtilissima var. micropunctata Germain, Flore des diatomées – Diatomophycées – eaux douces et saumâtres du Massif armoricain et des contrées voisines d’Europe occidentale: 234 (Germain 1981). — Navicula micropunctata (Germain) Kobayasi &amp; Nagumo, The Botanical Magazine, Tokyo 101 (1063): 247 (Kobayasi &amp; Nagumo 1988).</p><p>ECOLOGY AND DISTRIBUTION. — Kobayasiella mircopunctata was the most commonly found Kobayasiella species in our study, present in 33 lakes. However, its mean relative abundance was only 0.8%, with a maximum of 6.2% in Lake 16-F. No clear distributional pattern was distinguished according to water chemistry conditions. However, a medium alkalinity level seems to be consistent for this species. Mg and Na concentrations were linked to the distribution with respective optima at 0.87 mg /L and 0.34 mg /L. Kobayasi &amp; Nagumo (1988) observed this species from Imandra Lappmark (Russia) and Japan in waters with circumneutral pH and low conductivity (131 µS/cm). In North America, K. micropunctata has been reported from Montana (United States) in waters with pH 8.46 and low conductivity (19 µS/cm), indicative of fluctuating pH (Bahls 2012a). This species at present has a global distribution in northern and subalpine environments.</p><p>DESCRIPTION</p><p>The frustules are rectangular and narrow in girdle view. The valves exhibit a linear-lanceolate shape with more or less narrow subcapitate to capitate protruding ends. Based on a sample size of 22, the valve dimensions range from a length of 17 to 24.5 µm and a width of 3.5 to 6 µm. The stria density varies from 40 to 44 in 10 µm. The axial area is lanceolate and narrow. The central area is elliptic and occupies more than half the width of the valve, with seven to eight long and short striae between the proximal raphe ends (Fig. 9C). Externally, the valve face is flat. The raphe is linear, with a kink-like irregularity halfway between the mid-valve and apex (Fig. 9A, B). Externally, the central raphe fissures are widely spaced and linearly expanded, with enlarged rounded ends (Fig. 9C). The terminal raphe fissures are hooked to the secondary side of the valve opening and exhibit a small external funnel-like surface depression (Fig. 9D). Internally, the raphe is located on a thickened sternum. The terminal fissures end on small elongated helictoglossae, isolated from the apex mantle (Fig. 9E). The striae are strongly radiate at the mid-valve and become strongly convergent at the apices. The mantle striae are interrupted by a thick hyaline ridge at the valve face/mantle junction. The striae on the mantle apex are reduced and continuous around the apices. Distinct Voigt faults are present on both the primary and secondary sides, close to the apex. The striae are covered with four rows of small multiseriate pores. Internally, the multiseriate pores are positioned between thickened virgae. The cingulum is composed of finely silicified open wide copulae bands, and the copulae feature two rows of areolae covered with fine poroid occlusions. At the base of the copula, there is a fringe of fine pores (Fig. 9F).</p><p>Our taxon, with a linear-lanceolate outline and subcapitate to capitate protruding ends with hooked terminal raphe fissures, matches the species K. micropunctata (synonym: Navicula subtilissima var. micropunctata (Germain) Kobayasi &amp; Nagumo). In the original description, Germain (1981) reported his illustrated valve (in TEM) to be 2 µm wide, but based on the magnification it is actually 3.8 µm wide, which is in line with the specimens of Kobayasi &amp; Nagumo (1988) and those of this study. Kobayasi &amp; Nagumo (1988) emended the species with detailed SEM and TEM images. In their specimens the broad central area is documented along with the absence of virgae projections and hooked terminal raphe fissures. Kobayasi &amp; Nagumo (1988) did not examine the type material of Germain, but looked at materials from Imandra Lappmark (Russia) and Japan. Species with similar valve outlines but with a larger size include K. pseudostauron, K. tursujuqensis sp. nov. and K. subtilissima . In LM, this taxon is distinguished by size, subcapitate apices and a broad central area.</p></div>	https://treatment.plazi.org/id/AB6887832B22FFEFFF6DF961FEF94F95	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Alibert, Marie;Hamilton, Paul B.;Pienitz, Reinhard;Antoniades, Dermot	Alibert, Marie, Hamilton, Paul B., Pienitz, Reinhard, Antoniades, Dermot (2023): Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec. Cryptogamie, Algologie 20 (9): 157-187, DOI: 10.5252/cryptogamie-algologie2023v44a9, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/algologie2023v44a9.pdf
AB6887832B3DFFECFC9FF884FEFF4EE9.text	AB6887832B3DFFECFC9FF884FEFF4EE9.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Adlafia bryophila (J. B. Petersen) Lange-Bertalot	<div><p>Adlafia bryophila (J.B.Petersen) Lange-Bertalot</p><p>(Figs 10 A-R; 11 A-F)</p><p>Bibliotheca Diatomologica 38: 89 (Moser et al. 1998). — Navicula bryophila J.B.Petersen, The Botany of Iceland 2: 388 (Petersen 1928).</p><p>ECOLOGY AND DISTRIBUTION. — Adlafia bryophila was commonly observed inTursujuq National Park, found in 23 lakes.It was generally present in low relative abundances, with a mean of 0.5% and maximum of 2.7%. No distributional pattern was found in relation to general environmental conditions, but it appears to be a circumneutral species (Appendix 3). Moreover, its distribution may be affected by Mg and dissolved inorganic carbon (DIC) concentrations (Appendices 4; 5). This taxon has been identified from the circumpolar Arctic region.</p><p>DESCRIPTION</p><p>The frustules are rectangular and narrow in girdle view. The valves exhibit a linear to linear-lanceolate shape with rostrate ends. Based on a sample size of 28, the valve dimensions range from a length of 11.5 to 19 µm and a width of 3 to 4 µm. The stria number ranges from 28 to 30 in 10 µm. Externally, the valve face is flat. The axial area is weakly curved, lanceolate, and narrow. In LM, the axial area is almost indistinct. The central area is large, round to elliptic, favouring one side, and it possesses three to four marginal striae (Fig. 11C). The raphe is linear, without any kink-like irregularity halfway between the mid-valve and apex (Fig. 11A). Externally, the central raphe fissures are linearly expanded with small pores slightly deflecting to one side. The terminal raphe fissures are curved and extend down onto the upper region of the mantle (Fig. 11E). Adjacent to the terminal raphe, there is a ridged groove that runs from the valve face to the upper mantle. Internally, the raphe is located on an elevated sternum and appears straight, without any kink-like irregularity. The proximal raphe fissures are deflected to the same side (Fig. 11D). The terminal fissures end on small elevated helictoglossae, isolated from the apex mantle (Fig. 11F). The striae are radiate at the mid-valve and become convergent at the apices, and they are continuous from the valve face to the mantle. The striae are arched close to the mid-valve, and from the Voigt fault to the apex, they become straight. Voigt faults on the secondary side of the valve are located at approximately 2/3 of the distance between the mid-valve and apex. The striae are continuous around the apices. Areolae are round to rectangular, with five to six per stria and two to four at the apices (Fig. 11E, F). Externally, the areolae are covered with a fine poroid velum that exhibits eight to ten circular rows of small pores. Internally, the multiseriate pored velum is positioned between thickened virgae. Adlafia bryophila was first identified from Iceland by J.B. Petersen based on a small linear to linear-elliptic valve with distinct rostrate apices and fine striae.</p><p>The specimens from Tursujuq National Park are similar in size shape and form, but with a lower stria density (28- 30 in 10 µm versus c. 35 in 10 µm for Navicula bryophila (synonym: A. bryophila)). Petersen (1928) illustrated a line drawing with visible striae which would not be possible in the LM without specialized optics with 35 striae in 10 µm, so the stria density is also possibly less than 30 in 10 µm. In SEM, our specimens show the terminal raphe ends curving down onto the mantle, while the areolae have surface volate covers with fine poroids, which allows identification of this taxon as belonging to Adlafia . We appear to have two forms, one with a smaller central area and a second, more abundant form with a larger central area. There are a number of taxa with this general valve shape, including A. brockmanii (Hustedt) K.Bruder, A. coringii Metzeltin &amp; Lange-Bertalot, A. drouetiana (Patrick) Metzeltin &amp; Lange-Bertalot, A. muscora (Kociolek &amp; Reviers) Moser, Lange-Bertalot &amp; Metzeltin, A. parabryophila (Lange-Bertalot) Moser, Lange-Bertalot &amp; Metzeltin, A. pseudobaicalensis Kulikovskiy &amp; Lange-Bertalot, and A. suchlandtii (Hustedt) Moser, Lange-Bertalot &amp; Metzeltin. Adlafia coringii and A. drouetiana are larger and broader (more elliptic), while A. parabryophila is constricted with a lower stria density. Adlafia pseudobaicalensis and A. suchlandtii are more elliptic with weakly rostrate apices. The differentiation of A. bryophila from A. brockmannii and A. muscora is less clear and needs further study, although the central area of A. brockmannii is a full fascia, and A. muscora has less attenuated rostrate ends.</p></div>	https://treatment.plazi.org/id/AB6887832B3DFFECFC9FF884FEFF4EE9	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Alibert, Marie;Hamilton, Paul B.;Pienitz, Reinhard;Antoniades, Dermot	Alibert, Marie, Hamilton, Paul B., Pienitz, Reinhard, Antoniades, Dermot (2023): Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec. Cryptogamie, Algologie 20 (9): 157-187, DOI: 10.5252/cryptogamie-algologie2023v44a9, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/algologie2023v44a9.pdf
AB6887832B3EFFECFED7F94CFB2B4E82.text	AB6887832B3EFFECFED7F94CFB2B4E82.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Adlafia umiujaqensis Alibert & Hamilton & Pienitz & Antoniades 2023	<div><p>Adlafia umiujaqensis sp. nov.</p><p>(Figs 10 S-AG; 12 A-F)</p><p>HOLOTYPE. — Canada. Québec, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-76.47972&amp;materialsCitation.latitude=56.556667" title="Search Plazi for locations around (long -76.47972/lat 56.556667)">Lake</a> 22AA, 56°33’24”N, 76°28’47”W, 128 m a.s.l., 22.VIII.2015, D. Antoniades (microscope slide designated as the holotype, holo-, CANA [CANA 129481]).</p><p>ISOTYPE. — Canada. Québec, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-76.47972&amp;materialsCitation.latitude=56.556667" title="Search Plazi for locations around (long -76.47972/lat 56.556667)">Lake</a> 22AA, 56°33’24”N, 76°28’47”W, 128 m a.s.l., 22.VIII.2015, D. Antoniades (iso-, ANSP [ANSP-GC68068]) .</p><p>TYPE LOCALITY. — Canada. Québec, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-76.47972&amp;materialsCitation.latitude=56.556667" title="Search Plazi for locations around (long -76.47972/lat 56.556667)">Lake</a> 22AA, 56°33’24”N, 76°28’47”W, 128 m a.s.l.</p><p>ETYMOLOGY. — The epithet ‘umiujaqensis’ is named for the Inuit village nearest to the lake where the species was observed.</p><p>ECOLOGY AND DISTRIBUTION. — Adlafia umiujaqensis sp. nov. was found in three lakes of this study, CEN-O, 22-Z and 22-AA. While it represented 7.1% of the diatom assemblage in lake 22-AA, it reached only 1.9% and 0.6% relative abundance, respectively, in lakes 22-Z and CEN-O. The low number of occurrences obscured any potential autecological patterns of this species (Appendices 1; 2; 3).</p><p>REGISTRATION. — http://phycobank.org/103919.</p><p>DESCRIPTION</p><p>Frustules rectangular and narrow. Valves linear-elliptic to elliptic with rounded ends. Valve dimensions (n= 25): length 8-18.5 µm, width 4-4.5 µm and 30-33 striae in 10 µm. External valve face flat. Axial area weakly curved to linear and narrow. Central area round to elliptic, with 3-4 marginal striae between proximal raphe ends. Raphe linear to curved, with no kink-like irregularity halfway between mid-valve and apex (Fig. 12A, B). Externally, central raphe fissures narrow and not distinguished.Terminal raphe fissures curved down onto upper region of mantle (Fig. 12D). Ridged groove present adjacent to terminal raphe from valve face to upper mantle. Internally, raphe on evident sternum, straight, with no kink-like irregularity. Proximal raphe deflected strongly to one side of central nodule; nodule sometimes with surface depression or with an isolated pore (Fig. 12E). Terminal fissures end on small elevated helictoglossae, isolated from apex mantle. Internal hyaline area of apex more developed on secondary side. Striae more or less straight, weakly radiate at mid-valve to parallel or weakly convergent at apices and continuous from valve face to mantle. Voigt faults on secondary side of valve 2/3 of distance between mid-valve and apex. Striae continuous around apices. Areolae round to rectangular, 5-7 per stria, 3-4 at apices. Areolae covered by a fine poroid velum with 8-11 circular rows of small pores.</p><p>This taxon has a simple linear-elliptic to elliptic shape that could be assigned to many small taxa across different genera. The surface volate covers of the areolae, curved terminal fissures externally, simple bent proximal fissure internally and small terminal helictoglossae distinguish this as an Adlafia taxon. Electron microscopic examination of specimens may at times be necessary to document this species. Navicula muralis Grunow (synonym: A. minuscula var. muralis (Grunow) Lange-Bertalot) has a similar shape and the type material needs further study. Krammer &amp; Lange-Bertalot (1986) present a representative TEM of a valve, under the name N. suchlandtii sensu lato, that matches our taxon.</p></div>	https://treatment.plazi.org/id/AB6887832B3EFFECFED7F94CFB2B4E82	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Alibert, Marie;Hamilton, Paul B.;Pienitz, Reinhard;Antoniades, Dermot	Alibert, Marie, Hamilton, Paul B., Pienitz, Reinhard, Antoniades, Dermot (2023): Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec. Cryptogamie, Algologie 20 (9): 157-187, DOI: 10.5252/cryptogamie-algologie2023v44a9, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/algologie2023v44a9.pdf
AB6887832B3EFFEAFC12F8D7FED34D54.text	AB6887832B3EFFEAFC12F8D7FED34D54.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Adlafia ossiformis Alibert & Hamilton & Pienitz & Antoniades 2023	<div><p>Adlafia ossiformis sp. nov.</p><p>(Figs 10 AH-AT; 13 A-H)</p><p>HOLOTYPE. — Canada. Québec, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-76.47972&amp;materialsCitation.latitude=56.556667" title="Search Plazi for locations around (long -76.47972/lat 56.556667)">Lake</a> 22AA, 56°33’24”N, 76°28’47”W, 128 m a.s.l., 22.VIII.2015, D. Antoniades (microscope slide designated as the holotype, holo-, CANA [CANA 129481]) .</p><p>ISOTYPE. — Canada. Québec, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-76.47972&amp;materialsCitation.latitude=56.556667" title="Search Plazi for locations around (long -76.47972/lat 56.556667)">Lake</a> 22AA, 56°33’24”N, 76°28’47”W, 128 m a.s.l., 22.VIII.2015, D. Antoniades (iso-, ANSP [ANSP-GC68069]) .</p><p>TYPE LOCALITY. — Canada. Québec, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-76.47972&amp;materialsCitation.latitude=56.556667" title="Search Plazi for locations around (long -76.47972/lat 56.556667)">Lake</a> 22AA, 56°33’24”N, 76°28’47”W, 128 m a.s.l.</p><p>ETYMOLOGY. — The epithet ‘ossiformis’ is Latin, describing this species’ bone-shaped valves.</p><p>ECOLOGY AND DISTRIBUTION. — This species was found only in 22-AA lake of the study, where it represented 4% of the diatom assemblage. Lake 22-AA had the highest TP concentration in the dataset (23.4 µg/L).</p><p>REGISTRATION. — http://phycobank.org/103920.</p><p>DESCRIPTION</p><p>Frustules rectangular and narrow in girdle view.Valves elliptic at mid-valve with broad capitate ends. Valve dimensions (n =20): length 13.5-20.5 µm, width 4.5-5.5 µm and 30-35 striae in 10 µm. External valve face flat, margin rounded. Axial area slightly curved to linear and narrow. Central area round to elliptic,&gt;1/2 width of valve, with 5-7 marginal striae between proximal raphe endings. Raphe linear, with no kink-like irregularity halfway between mid-valve and apex (Fig. 13A); externally, central raphe fissures widely spaced with small indistinct ends bent to one side (Fig. 13C). Terminal raphe fissures curved down onto upper region of mantle (Fig. 13G). A weakly formed groove present parallel to raphe on mantle up to valve face. Internally, raphe on small sternum, straight, with no kink-like irregularity (Fig. 13B). Proximal raphe fissures bent and deflected on a raised nodule (Fig. 13D). One surface depression present on central nodule (Fig. 13D, E). Terminal fissures end on small elongated helictoglossae, isolated from apex mantle (Fig. 13H). Hyaline area of terminal nodule more developed on secondary side of valve. Striae continuous, straight to weakly arched from valve face to mantle, more widely spaced around central area. Voigt faults weak to indistinct on secondary side of valve 2/3 of distance between mid-valve and apex. Striae continuous around base of apices. Areolae round to rectangular, 4-6 per stria. Areolae covered with a fine poroid velum with 8-9 circular rows of small pores around outside edge and linear rows on inner area. Internally, areolae recessed between virgae.</p><p>Adlafia ossiformis sp. nov. has a shape that is easily confused in LM with Psammothidium ventralis (Krasske) Bukhtiyarova &amp; Round and Sellaphora guyanensis Metzeltin &amp; Lange-Bertalot, but careful examination of both valves will make species differentiation possible.</p></div>	https://treatment.plazi.org/id/AB6887832B3EFFEAFC12F8D7FED34D54	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Alibert, Marie;Hamilton, Paul B.;Pienitz, Reinhard;Antoniades, Dermot	Alibert, Marie, Hamilton, Paul B., Pienitz, Reinhard, Antoniades, Dermot (2023): Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec. Cryptogamie, Algologie 20 (9): 157-187, DOI: 10.5252/cryptogamie-algologie2023v44a9, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/algologie2023v44a9.pdf
AB6887832B38FFEAFEE9FA27FA354F92.text	AB6887832B38FFEAFEE9FA27FA354F92.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Sellaphora vincentiana Alibert & Hamilton & Pienitz & Antoniades 2023	<div><p>Sellaphora vincentiana sp. nov.</p><p>(Figs 10 AU-BJ; 14 A-F)</p><p>HOLOTYPE. — Canada. Québec, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-76.47972&amp;materialsCitation.latitude=56.556667" title="Search Plazi for locations around (long -76.47972/lat 56.556667)">Lake</a> 22AA, 56°33’24”N, 76°28’47”W, 128 m a.s.l., 22.VIII.2015, D. Antoniades (microscope slide designated as the holotype, holo-, CANA [CANA 129481]).</p><p>ISOTYPE. — Canada. Québec, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-76.47972&amp;materialsCitation.latitude=56.556667" title="Search Plazi for locations around (long -76.47972/lat 56.556667)">Lake</a> 22AA, 56°33’24”N, 76°28’47”W, 128 m a.s.l., 22.VIII.2015, D. Antoniades (iso-, ANSP [ANSP-GC68070]) .</p><p>TYPE LOCALITY. — Canada. Québec, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-76.47972&amp;materialsCitation.latitude=56.556667" title="Search Plazi for locations around (long -76.47972/lat 56.556667)">Lake</a> 22AA, 56°33’24”N, 76°28’47”W, 128 m a.s.l.</p><p>ETYMOLOGY. — The epithet ‘vincentiana’ is named in honour of our dear colleague Warwick Vincent, whose contributions to diatom research are substantial and cannot be measured.</p><p>ECOLOGY AND DISTRIBUTION. — This species was found in two lakes of the study: 22-Z and 22-AA. It reached 4.6% relative abundance in lake 22-AA and only 0.6% in 22-Z. The low number of occurrences prevented us from discerning clear relationships with lake chemistry, but both sites where it occurred had circumneutral conditions, and Lake 22-AA had the highest TP concentration in the dataset.</p><p>REGISTRATION. — http://phycobank.org/103921.</p><p>DESCRIPTION</p><p>Frustules rectangular and narrow in girdle view. Valves linear-elliptic to elliptic with restricted rostrate ends. Valve dimensions (n =25): length 8-18.5 µm, width 2.5-4.5 µm. External valve face flat, margin rounded. The stria density is 49-51 in 10 µm. Axial area curved and narrow; external sternum raised. Central area weakly expanded, with 4-6 marginal striae between proximal raphe fissures, 1-2 striae shorter than the others (Fig. 14 A-C). Raphe curved, with no kink-like irregularity halfway between mid-valve and apex; externally, central raphe fissures linearly expanded with rounded ends sometimes bent to primary side (Fig. 14B, C).Terminal raphe fissures bent down onto upper region of mantle, opening into a small circular depression (Fig. 14D). Internally, raphe on sternum, straight, with no kink-like irregularity. Proximal raphe fissures teardrop-shaped and positioned on raised central nodule (Fig. 14E); terminal fissures end on small helictoglossae, isolated from apex mantle (Fig. 14F). Striae more widely spaced around central area, and parallel throughout. Striae continuous, straight to weakly arched from valve face to mantle. Voigt faults indistinct. Striae continuous around apices. Areolae round to rectangular, 8-10 per stria, 3-4 at apices (Fig. 14D). Areolae covered with a recessed fine poroid velum with circular rows of small and almost indistinct pores around outside edge and random distribution on inner area. Areolae along axial sternum more evidently depressed. Internally, areolae between virgae weakly recessed with volate pore cover.</p><p>The small linear to linear-elliptic shape with subrostrate to rostrate apices is a common shape of many species and genera which creates confusion in identifications.Furthermore, the high striae counts may create confusion between Adlafia, Eolimna and Sellaphora . As a result, taxonomic confusion persists today when trying to distinguish taxa within these genera. After SEM study, the morphology of these valves is clearly aligned with the genus Sellaphora, with recessed volate occlusion of the areolae, raised external axial and terminal areas, distinctly larger areolae along the axial area, and bent terminal raphe fissures down onto the mantle. A distinct asymmetric internal central nodule also helps to distinguish this taxon from Adlafia and Eolimna species. Sellaphora stauroneioides (Lange-Bertalot) Vesela &amp; Johansen is comparable to Sellaphora vincentiana sp. nov., but is larger, with clear hyaline areas at the apices and is more linear than linear-elliptic. Electron microscopic comparisons are needed to distinguish these small Sellaphora species. In addition, Navicula arvensoides Hustedt and Sellaphora pseudoarvensis (Hustedt) Wetzel &amp; Ector are small taxa with similar valve outlines, linear valve margins and distinct rostrate or subcapitate apices (Simonsen 1987; Table 3). With no SEM examination of these taxa, detailed comparisons are limited to LM which shows a triundulate valve margin with broad rostrate apices, and visible striae in N. arvensoides; in contrast, S. pseudoarvensis has linear valve margins, curved raphe branches, no visible striae and subcapitate apices.</p></div>	https://treatment.plazi.org/id/AB6887832B38FFEAFEE9FA27FA354F92	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Alibert, Marie;Hamilton, Paul B.;Pienitz, Reinhard;Antoniades, Dermot	Alibert, Marie, Hamilton, Paul B., Pienitz, Reinhard, Antoniades, Dermot (2023): Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec. Cryptogamie, Algologie 20 (9): 157-187, DOI: 10.5252/cryptogamie-algologie2023v44a9, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/algologie2023v44a9.pdf
AB6887832B3BFFE8FF3BF8A4FBB04BB6.text	AB6887832B3BFFE8FF3BF8A4FBB04BB6.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Nupela tenuicephala (Hustedt) Lange-Bertalot	<div><p>Nupela tenuicephala (Hustedt) Lange-Bertalot</p><p>(Figs 10 BK-BY; 15 A-F)</p><p>Bibliotheca Diatomologica 27: 157 (Lange-Bertalot 1993). — Navicula tenuicephala Hustedt, Archiv für Hydrobiologie 39 (1): 113 (Hustedt 1942). — Navicula tridentula var. tenuicephala Cleve-Euler, Kongliga Svenska Vetenskaps-Akademiens Handligar, ser. 4, 4 (5): 190 (Cleve-Euler 1953).</p><p>Nupela paludigena (Scherer) Lange-Bertalot, Bibliotheca Diatomologica 27: 158 (Lange-Bertalot 1993). — Anomoeoneis paludigena Scherer, Diatom Research 3 (1): 149 (Scherer 1988).</p><p>ECOLOGY AND DISTRIBUTION. — Nupela tenuicephala was found in 14 lakes from Tursujuq National Park. It was not abundant, with a mean relative abundance of 1.1%, although lakes 16-H and 18-P had populations reaching 38.6 and 9.6% relative abundance. While there were no evident distribution patterns linked to water chemistry, this species was more prominent in low conductivity and acidic waters with a pH optimum of 5.9 (Appendix 3), and associated with low DIC and Mg (Appendices 4; 5). Nupela tenuicephala is common across eastern North America in acidic waters according to Siver &amp; Hamilton (2011) (as N. paludigena), Fallu et al. (2000) (as N. tenuicephala), and Camburn &amp; Charles (2000) (as Anomoeoneis paludigena).</p><p>DESCRIPTION</p><p>The frustules are rectangular and narrow in girdle view. The valves exhibit an asymmetric shape, being linear on the primary side and linear-elliptic on the secondary side, with constricted rostrate to capitate ends (Fig. 15A, B, C). The valve dimensions, based on a sample size of 25, range from a length of 9.5 to 14 µm and a width of 2.5 to 3.5 µm. The stria density is 54-55 in 10 µm. Externally, the valve face is flat, and the margin abruptly bends (not curves) towards the mantle. The axial area is linear to lanceolate and narrow. The central area is asymmetric, being elliptic on the primary side with four marginal striae, and it exhibits a slightly elevated fascia on the secondary side (Fig. 15A, C, D). The raphe is linear and curved, without any kink-like irregularity halfway between the mid-valve and apex. Externally, the central raphe fissures are linearly expanded with teardrop rounded ends (Fig. 15D). The terminal raphe fissures curve and bend, extending down to the lower mantle. Internally, the raphe is located on the sternum and appears straight. The proximal raphe fissures are small and hooked to the secondary side (Fig. 15E), while the terminal fissures end on small elevated helictoglossae, isolated from the apex mantle (Fig. 15F). The striae are parallel to weakly radiate close to the mid-valve, and they become parallel at the ends. On the valve face, the striae are straight to weakly arched and interrupted at the valve edge. Voigt faults on the secondary side of the valve are indistinct, located at approximately 2/3 of the distance between the mid-valve and apex. The striae are interrupted by the raphe at the apices. Areolae are round to rectangular, with five to six per stria on the secondary side and three to four on the primary side. They are covered with a poroid velum that exhibits fine circular rows of small pores.</p><p>This taxon was originally described by Hustedt as a Navicula species from Lapland, Abisko, Sweden. There were three slides with this taxon named by Simonsen (1987: 232) with one slide selected (P2/57, Lapland 189, Abisko, Tümpel) as the lectotype. The LM images of Simonsen and specimens from Bahls &amp; Potapova (2015) match our specimens. Scherer (1988) also described a similar species ( Anomoeoneis paludigena) from Georgia (United States), which was transferred to Nupela by Lange-Bertalot (1993) and later emended by Siver et al. (2007). At this time, N. tenuicephala is in synonymy with N. paludigena . See Siver &amp; Hamilton (2011) for a more thorough discussion about N. paludigena . Nupela tenuicephala is also similar to N. giluwensis Vyverman &amp; Compère, but is distinguished by the differences in outline, striae density and formation of the central area. Siver &amp; Hamilton (2011) suggest there is little difference between N. tenuicephala (synonym: N. paludigena) and N. giluwensis and they propose a more thorough comparison between these taxa. Another similar species is N. subinvicta (Krasske) Lange-Bertalot observed from Chile, but this taxon is different from N. tenuicephala with respect to valve symmetry, the large capitate apices and a broad central area.</p></div>	https://treatment.plazi.org/id/AB6887832B3BFFE8FF3BF8A4FBB04BB6	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Alibert, Marie;Hamilton, Paul B.;Pienitz, Reinhard;Antoniades, Dermot	Alibert, Marie, Hamilton, Paul B., Pienitz, Reinhard, Antoniades, Dermot (2023): Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec. Cryptogamie, Algologie 20 (9): 157-187, DOI: 10.5252/cryptogamie-algologie2023v44a9, URL: https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/algologie2023v44a9.pdf
