identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
877E898DBF3D50E69551057C6EE22794.text	877E898DBF3D50E69551057C6EE22794.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Stenotanais Bird & Holdich 1984	<html xmlns:mods="http://www.loc.gov/mods/v3">
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            <p> Genus  Stenotanais Bird &amp; Holdich, 1984</p>
            <p>Diagnosis</p>
            <p> (Modified from Larsen 2005, 2011). Female. Body elongate (11.5-13  × L:W). Pereonites longer than wide, with straight lateral edges. Pleon short (15-20% of TBL). Antennule shorter than carapace, four-articled. Antenna six-articled. Mandibular molar tapering, with terminal spines. Maxillule with eight to ten terminal spines. Maxilliped endite with rounded cusps, spiniform lateral corners and distal seta. Cheliped carpus robust with large distoventral shield; chela robust, fixed finger with two robust ventral spines. Pereopods 1-3 basis wider than on pereopods 4-6; merus and carpus with spine. Pereopods 4-6 without coxae. Pereopods 4-6 dactylus and unguis not fused; dactylus with double-row of small spines. Pleopods short and broad, with plumose or simple setae. Uropods prominent, often as long as antennae: endopod two-articled; exopod one- or two-articled; specialised setae with a wide and flat basis present on either exopod or endopod. </p>
            <p> Male. Immature (preparatory) male with antennule thicker than in female, functional mouthparts present (see remarks on genus). Sexually mature  ‘swimming’ type: cephalothorax as long as first three pereonites; pereon shorter than in female; pleon well developed, as long as pereon, caudally pointed; multi-articulate antennule with multiple aesthetascs, distal article longer than preceding article; no functional mouthparts; uropod biramous, endopod and exopod two-articled. </p>
            <p>Type species.</p>
            <p> Stenotanais crassiseta Bird &amp; Holdich, 1984, by original designation. Gender: feminine. </p>
            <p>Species included.</p>
            <p> Stenotanais arenasi Larsen, 2011;  S. crassiseta Bird &amp; Holdich, 1984;  S. hamicauda Bird &amp; Holdich, 1984;  S. macrodactylus Larsen, 2005;  S. leonardoi sp. nov.;  S. uropedon sp. nov. </p>
            <p>Remarks.</p>
            <p> The rather infrequently-recorded  Stenotanais is similar to akanthophoreid genera such as  Pseudakanthophoreus Lubinevsky, Tom &amp; Bird, 2022 and  Parakanthophoreus Larsen &amp;  Araújo-Silva , 2014, by having chelipeds without extensive surface ornamentation and the absence of spurs on pleonite-5, pleotelson and the uropod basal article or endopod article-1. However,  Stenotanais can be distinguished mainly by having the basis of pereopods 1-3 thicker than the basis of pereopods 4-6 and the presence of specialised setae with a wide and flat basal attachment on the uropod (Bird and Holdich 1984; Larsen 2011). </p>
            <p> Larsen (2011) described  S. arenasi , based on a single specimen and expressed uncertainty as to whether it really belongs to  Stenotanais , so that its generic affiliation should be considered tentative. We agree that this species may belong to a different genus as its cheliped lacks a strong carpal shield, the shape of the antennule articles 3-4 does not conform to other  Stenotanais species (article-3 not rectangular and article-4 minute, as long as wide; which can be a sexually dimorphic character) and the uropods are not ventrally deflexed (i.e. not folded back on themselves). Although not an impediment for supporting the exclusion of  S. arenasi from  Stenotanais , it is of note that it is so far the only species of the genus reported from the Pacific Ocean (Fig. 8). Despite these considerations, we adhere to the current classification until more evidence is available. </p>
            <p> The single available specimen of  S. arenasi may be a preparatory male, based on characters of the antennule articles 1-2 (as suggested by Larsen 2011) and has functional mouthparts. Here, we record the first sexually mature  ‘swimming’ male of  S. leonardoi sp. nov. (see below), the first to have been noticed in  Stenotanais , although it would have been desirable to confirm the link between male and female forms of the same species using molecular analysis. </p>
            <p> Another character in the original generic diagnosis of Bird and Holdich (1984) is the pereopods 1-3 propodus having a distinct convex inferior margin armed with small strong spinules. This needs further investigation as it is true for  S. crassiseta ,  S. hamicauda and both new species described here, but not for  S. arenasi and  S. macrodactylus . </p>
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	https://treatment.plazi.org/id/877E898DBF3D50E69551057C6EE22794	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.		Pensoft via Plazi	Segadilha, Juliana Lopes;Bird, Graham;Tavares, Marcos	Segadilha, Juliana Lopes, Bird, Graham, Tavares, Marcos (2023): Stenotanais (Crustacea, Tanaidacea) from the Santos Basin: the first described species of the family Akanthophoreidae off the Brazilian coast. Zoosystematics and Evolution 99 (2): 423-437, DOI: http://dx.doi.org/10.3897/zse.99.103003, URL: http://dx.doi.org/10.3897/zse.99.103003
74935EE00738524DB0561E02410C3CFE.text	74935EE00738524DB0561E02410C3CFE.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Stenotanais leonardoi Segadilha & Bird & Tavares 2023	<html xmlns:mods="http://www.loc.gov/mods/v3">
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            <p> Stenotanais leonardoi sp. nov.</p>
            <p>Figs 1, 2, 3, 4</p>
            <p>Material examined.</p>
            <p> Holotype: Brazil - Santa Catarina State • neuter, length 1.9 mm; stn A8 R2, 0-2 cm; MZUSP 43545.</p>
            <p>  Paratypes: Brazil -  São Paulo State • 1 neuter (dissected), length 2.1 mm; stn E8 R 3, 5-10 cm; MZUSP 43547  -  Santa Catarina State • 1 male, length 0.9 mm; stn A8 R 3, 2-5 cm; MZUSP 43546 • 3 neuters; stn A8 R 1, 2-5 cm (1 dissected); MZUSP 43548 • 2 neuters; stn A8 R 2, 2-5 cm; MZUSP 43549 • 2 neuters; stn A8 R3, 0-2 cm; MZUSP 43550 • 1 neuter; stn A10 R 2, 2-5 cm; MZUSP 43551 • 1 neuter; stn A11 R3, 0-2 cm; MZUSP 43552 -  Paraná State • 1 neuter; stn B7 R1, 0-2 cm; MZUSP 43553 • 2 neuters; stn B7 R 2, 2-5 cm; MZUSP 43554 • 1 neuter; stn B7 R 3, 2-5 cm; MZUSP 43555 • 1 neuter; stn B8 R 2, 2-5 cm; MZUSP 43556 • 1 neuter; stn B9 R 2, 5-10 cm; MZUSP 43557 -   São Paulo State • 2 neuters; stn C7 R 1, 2-5 cm; MZUSP 43558 • 1 neuter; stn C7 R 2, 2-5 cm; MZUSP 43559 • 1 neuter; stn C7 R 3, 2-5 cm; MZUSP 43560 • 1 neuter; stn C7 R 3, 5-10 cm; MZUSP 43561 • 1 neuter; stn C8 R 1, 2-5 cm; MZUSP 43562 • 2 neuters and 1 juvenile; stn C8 R 2, 2-5 cm; MZUSP 43563 • 2 neuters; stn C9 R 1, 2-5 cm; MZUSP 43564 • 1 neuter; stn C9 R 1, 5-10 cm; MZUSP 43565 • 1 neuter; stn C11 R 1, 2-5 cm; MZUSP 43566 • 1 neuter; stn C11 R 2, 2-5 cm; MZUSP 43567 • 1 neuter; stn D8 R1, 0-2 cm; MZUSP 43568 • 2 neuters; stn E7 R 3, 2-5 cm; MZUSP 43569 • 1 neuter; stn E8 R 1, 5-10 cm; MZUSP 43570 • 2 neuters; stn E8 R 3, 2-5 cm; MZUSP 43571 • 2 neuters; stn E9 R 1, 5-10 cm; MZUSP 43572  - Rio de Janeiro State • 1 neuter; stn F7 R 1, 2-5 cm; MZUSP 43573 • 1 neuter; stn F7 R 2, 2-5 cm; MZUSP 43574 • 1 neuter; stn F7 R 2, 5-10 cm; MZUSP 43575 • 1 neuter; stn F7 R 3, 2-5 cm; MZUSP 43576 • 1 neuter; stn H7 R 2, 2-5 cm; MZUSP 43577 • 1 neuter; stn H10 R 2, 2-5 cm; MZUSP 43578 • 1 neuter; stn H10 R 2, 5-10 cm; MZUSP 43579 • 1 neuter; stn P5 R 3, 2-5 cm; MZUSP 43580. </p>
            <p>Diagnosis.</p>
            <p> Neuter. Cheliped fixed finger with two simple setae on cutting edge. Pereopods 2-3 carpus with long spine, longer than half length of propodus. Uropod basal article longer than pleotelson; exopod and endopod with subparallel margins; exopod slightly wider than endopod, longer than endopod article-1 (0.7  × endopod), with two flat and wide terminal setae. </p>
            <p>Etymology.</p>
            <p> The species is dedicated to the first  author’s life partner, Leonardo Santos de Souza, who has supported and encouraged this author in her academic career. </p>
            <p>Description.</p>
            <p> Based on neuter holotype (MZUSP 43545) length 1.9 mm, dissected neuter paratype (MZUSP 43547) length 2.1 mm and male (MZUSP 43546) length 0.9 mm. Body (Fig. 1A) very slender, about 14  × L:W. Cephalothorax elongate 1.7  × L:W, 1.5  × pereonite-1, straight-sided, naked. Pereonites 1-6. All pereonites rectangular, longer than wide, parallel-sided; pereonite-1 1.3  × L:W; pereonite-2 2.3  × L:W; pereonite-3 2.4  × L:W; pereonites 4-5 2.0  × L:W; pereonite-6 shortest, 1.3  × L:W. Pleon (Fig. 1A) short, 0.2  × TBL, about as long as pereonites 5 and 6 combined, with five subequal pleonites. Pleotelson short, trapezoidal 0.6  × L:W, less than half-length of pleon. </p>
            <p> Antennule (Fig. 2A) 0.6  × cephalothorax; article-1 about 0.4  × TL, 1.6  × L:W, with one simple seta and three distal PSS; article-2 1.8  × L:W, 0.8  × article-1, with two simple setae and one distal PSS; article-3 0.9  × L:W, 0.3  × article-2, with simple subdistal seta; article-4 2.6  × L:W, 1.9  × article-3, with simple subdistal seta and with aesthetasc, three simple and minute terminal setae. Antenna (Fig. 2B) article-1 fused with body; article-2 as long as wide, with one simple distal seta; article-3 1.5  × L:W, naked; article-4 2.8  × L:W, 2.2  × article-3, with three medial PSS and three simple distal setae; article-5 3.0  × L:W, 0.7  × article-4, with a distal seta; article-6 minute with five simple terminal setae. </p>
            <p>Labrum (Fig. 2C) elongate, hood-shaped, covered by minute setae. Mandible (Fig. 2D-G) with acuminate molar process with three or four terminal spines; left mandible (Fig. 2D, E) incisor smooth, with five unequal teeth and smooth lacinia mobilis (separated from incisor by wide gap); right mandible (Fig. 2F, G) with three strong teeth on incisor process, molar broken off during dissection. Maxillule (Fig. 2H) endite with nine terminal spines (at least two serrate), outer margin with setule; palp broken off during dissection. Maxilla (Fig. 2I) ovoid and stout, but large relative to maxilliped.</p>
            <p>Maxilliped (Fig. 2J) basis with one simple seta near articulation with palps, not reaching distal margin of endites; endites unfused, with rounded distal cusps and a short seta on distal edge; palp article-1 naked; article-2 with three inner and one outer setae; article-3 with three (two long) inner setae; article-4 with four inner setae and one subdistal outer seta. Labium and epignath not observed.</p>
            <p> Cheliped (Fig. 2K) and sclerite calcified; basis with one minute dorsodistal seta and long posterior projection (lobe), not reaching pereonite-1; 3.6  × L:W; merus subtriangular, with ventral seta; carpus stout 1.4  × L:W, with ventral seta and one proximal and one dorsodistal setae, carpal shield large, well developed; propodus stout 0.9  × carpus, 1.5  × L:W, with two setae near dactylus insertion on inner side (one long and one short); fixed finger with two strong serrate ventral spines and one spine on distolateral margin; cutting edge with two simple setae, dactylus slightly shorter than fixed finger. </p>
            <p> Pereopod-1 (Fig. 3A) stout; coxa annular, seta not observed; basis broad 2.2  × L:W, naked; ischium with seta (not drawn); merus short 0.8  × L:W, with one ventrodistal seta and long spine reaching carpus distal margin; carpus short 0.6  × L:W, about as long as merus, with ventrodistal spine and one spinule (microtrichial), dorsodistal with long spine and microtrichia; propodus short 1.9  × L:W, 2.3  × carpus, with convex inferior margin with ventrodistal spine, microtrichia and two spinules and dorsodistal minute seta; dactylus as long as unguis, together 0.8  × propodus. </p>
            <p> Pereopod-2 (Fig. 3B) stout; basis broad 2.0  × L:W, with large dorsal PSS; ischium with one seta; merus 1.1  × L:W, with ventrodistal long spine reaching carpus distal margin; carpus short as long as wide, as long as merus, with ventral spinules and microtrichia, two unequal ventrodistal spines (one longer than half length of propodus) and dorsodistal spine; propodus short 2.0  × L:W, 1.7  × carpus, with convex inferior margin with ventrodistal spine, microtrichia and two spinules, dorsodistal minute seta; dactylus 0.7  × unguis, together 0.8  × propodus. </p>
            <p>Pereopod-3 (Fig. 3C) similar to pereopod-2, except basis naked.</p>
            <p> Pereopod-4 (Fig. 3D) basis broken during dissection, naked; ischium with two long seta (only one drawn); merus 1.2  × L:W, with two ventrodistal spines; carpus 1.6  × L:W, with one seta and three distal spines; propodus stout 2.8  × L:W, with two ventrodistal spines and robust dorsodistal seta; dactylus with double row of ventral spines, 1.9  × unguis, together as long as propodus. </p>
            <p> Pereopod-5 (Fig. 3E) similar to pereopod-4, except basis 2.4  × L:W; 2.3  × L:W, with dorsodistal minute and robust setae; dactylus and unguis together 1.2  × propodus. </p>
            <p> Pereopod-6 (Fig. 3F) similar to pereopod-5, except basis 1.9  × L:W; ischium with two long seta (only one drawn); propodus short 1.6  × L:W, with three robust dorsodistal setae (one long and two short); dactylus with larger ventral spines, 3.2  × unguis, together 0.9  × propodus. </p>
            <p>Pleopod (Fig. 3G) basal article naked; exopod with at least four plumose setae on outer margin and one seta on inner margin; endopod with at least ten plumose setae on outer margin, large gap between most proximal.</p>
            <p> Uropod (Fig. 3H) reflexed; basis long 2.3  × L:W, about 1.1  × pleotelson, naked; exopod (Fig. 3H ") one-articled, somewhat wider than endopod, 0.7  × endopod, with long medial seta and tipped by two specialised stout setae; endopod (Fig. 3H ') two-articled; article-1 with distal seta; article-2 with long medial seta, two PSS and two simple distal setae. </p>
            <p> Male (Figs 1B, 4A-C). The only specimen of a putative 'swimming  male’ of this species has a pereon shorter than in female and a well-developed pleon (Fig. 1B), larger than in female, as long as the pereon. Antennule seven-articled (Fig. 4A), broader than female, with numerous aesthetascs. No functional mouthparts. Cheliped thinner than in female (Fig. 4B), propodus fixed finger and dactylus with sharp point. Pleopods strong, supported with long plumose setae (with more setae than female). Uropod biramous (Fig. 4C), endopod and exopod of two articles. </p>
            <p>Type locality.</p>
            <p>Santa Catarina State, Brazil; stn A8 R2, -27,29679714, -46,62516071 (1045 m).</p>
            <p>Distribution.</p>
            <p> Brazil: Santos Basin (Rio de Janeiro,  São Paulo,  Paraná and Santa Catarina States). Occurring on the lower slope and the  São Paulo Plateau area, ranging from depths of 686 to 2410 m. This species was the most abundant (51 individuals), with 71% of the specimens found at 2-5 cm sediment layer (i.e. up to 25  × their body length). </p>
            <p>Remarks.</p>
            <p> This new species is similar to  S. crassiseta from the NE Atlantic in having the propodus of pereopods 1-3 with a convex inferior margin bearing many spinules and the general shape of the uropod endopod, but is distinguished by: (1) the cheliped basis more slender 3.6  × L:W (2.9  × in  S. crassiseta ); (2) the cheliped fixed finger with two simple setae on cutting edge (three in  S. crassiseta ); (3) the pereopod-1 dactylus as long as unguis (0.8  × in  S. crassiseta ); (4) the pereopods 2-3 carpus with long spine, longer than half length of propodus (about one third in  S. crassiseta ); and (5) the uropod exopod one-articled and much longer than endopod article-1, 0.7  × endopod (exopod two-articled and as long as endopod article-1, 0.4  × in  S. crassiseta ). </p>
            <p> Stenotanais leonardoi sp. nov. also resembles  S. macrodactylus from the Gulf of Mexico (NW Atlantic) mainly by the shape of uropod; however, it differs by a combination of characters including: (1) antennule 0.6  × cephalothorax (slightly shorter 0.8  × in  S. macrodactylus ); (2) cheliped fixed finger with two simple setae on cutting edge (two 'spiniform  setae’ in  S. macrodactylus ); (3) pereopod-2 dactylus 0.7  × unguis (more than twice in  S. macrodactylus ); and (4) pereopods 2-3 propodus with convex inferior margin with ventrodistal spine, microtrichia and spinules (only with ventrodistal spine in  S. macrodactylus ). The new species has the cheliped fixed finger with strong serrate spines ventrally, which could have been overlooked by other authors (e.g. as 'strong  spines’ , Bird and Holdich (1984) or as 'robust spiniform  setae’ , Larsen (2005, 2011 )). </p>
            <p> The male is of the  ‘swimming’ type with no functional mouthparts, shortened pereon and multi-articulate antennule with multiple aesthetascs. This specimen was found in the same sample as an individual of  S. leonardoi (a neuter) and was identified as this species by chelipedal features, such as the basis with a long posterior lobe, a carpal shield and well-developed fixed finger with two strong serrate ventral spines and uropod rami with subparallel margins (not oar-shaped as in  S. uropedon sp. nov.). Only one male specimen was sampled while 50 neuters were collected, demonstrating how  “unbalanced” the sexual ratio can be in tanaidacean species. However, as with all 'swimming  males’ and the rare matching of sexes, only with a molecular analysis can conspecificity be absolutely confirmed (  Błażewicz-Paszkowycz et al. 2014). </p>
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	https://treatment.plazi.org/id/74935EE00738524DB0561E02410C3CFE	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.		Pensoft via Plazi	Segadilha, Juliana Lopes;Bird, Graham;Tavares, Marcos	Segadilha, Juliana Lopes, Bird, Graham, Tavares, Marcos (2023): Stenotanais (Crustacea, Tanaidacea) from the Santos Basin: the first described species of the family Akanthophoreidae off the Brazilian coast. Zoosystematics and Evolution 99 (2): 423-437, DOI: http://dx.doi.org/10.3897/zse.99.103003, URL: http://dx.doi.org/10.3897/zse.99.103003
10397355C51F598FB90B438E8AF64817.text	10397355C51F598FB90B438E8AF64817.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Stenotanais uropedon Segadilha & Bird & Tavares 2023	<html xmlns:mods="http://www.loc.gov/mods/v3">
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            <p> Stenotanais uropedon sp. nov.</p>
            <p>Figs 5, 6, 7</p>
            <p>Material examined.</p>
            <p>  Holotype: Brazil -  São Paulo State • neuter, length 1.7 mm; stn D10 R 3, 5-10 cm; MZUSP 43581. </p>
            <p> Paratypes: Brazil - Rio de Janeiro State • 1 neuter (dissected), length 1.7 mm; stn P10 R 3, 5-10 cm; MZUSP 43582 - Santa Catarina State • 1 neuter; stn A8 R1, 0-2 cm; MZUSP 43583 -  Paraná State • 1 neuter; stn B9 R 1, 5-10 cm; MZUSP 43584 • 1 neuter; stn B9 R 3, 5-10 cm; MZUSP 43585 -  São Paulo State • 1 neuter; stn C8 R 1, 2-5 cm (dissected); MZUSP 43586 • 1 neuter; stn E8 R1, 0-2 cm; MZUSP 43587 • 1 neuter; stn E8 R 3, 2-5 cm; MZUSP 43588 • 1 neuter; stn E10 R 2, 2-5 cm; MZUSP 43589 • 1 neuter; stn E10 R 3, 5-10 cm; MZUSP 43590. -  Rio de Janeiro State • 1 juvenile; stn F8 R2, 0-2 cm; MZUSP 43591 • 1 neuter; stn F8 R 2, 2-5 cm; MZUSP 43592 • 1 neuter; stn F9 R 3, 2-5 cm; MZUSP 43593 • 2 neuters; stn G9 R1, 0-2 cm; MZUSP 43594 • 1 juvenile; stn P3 R 2, 2-5 cm; MZUSP 43595 . </p>
            <p>Diagnosis.</p>
            <p> Neuter. Cheliped fixed finger with two simple setae and one spine on cutting edge and a nearby spine on the distolateral margin of the propodal palm. Pereopods 2-3 carpus with long spine, longer than half length of propodus. Uropod endopod oar-shaped, with article-2 broad and flattened; exopod short, 0.3  × of endopod length; both rami without specialised articulated setae. </p>
            <p>Etymology.</p>
            <p> From the Greek  ‘pedon’ (noun), meaning 'oar,  rudder’ ; alluding to the shape of uropod endopod. The name is a noun in apposition with the generic name. </p>
            <p>Description.</p>
            <p> Based on neuter holotype (MZUSP 43581) length 1.7 mm and dissected neuter paratype (MZUSP 43582) length 1.7 mm. Body (Fig. 5A) slender, about 8.5  × L:W. Cephalothorax elongate 1.7  × L:W, 1.7  × pereonite-1, straight-sided, naked. Pereonites 1-6. All pereonites rectangular, parallel-sided; pereonite-1 0.8  × L:W; pereonite-2 1.3  × L:W; pereonites 3-4 1.2  × L:W; pereonite-5 square, as long as wide; pereonite-6 shortest, 0.5  × L:W. Pleon (Fig. 5A, B) short, 0.1  × TBL, about as long as pereonites 5 and 6 combined, with five subequal pleonites, with one minute seta on lateral margins. Pleotelson (Fig. 5B) trapezoidal about 0.7  × L:W, 0.4  × pleon, with pointed posterior margin bearing two pairs of simple setae and one of PSS distally. </p>
            <p> Antennule (Fig. 5C) 0.6  × cephalothorax; article-1 0.5  × TL, 1.9  × L:W, with three middle PSS and one simple and two PSS distally; article-2 1.6  × L:W, 0.6  × article-1, with two simple (one long and one minute) and two distal PSS; article-3 1.1  × L:W, 0.5  × article-2, with simple subdistal seta; article-4 2.4  × L:W, 1.5  × article-3, with aesthetasc and six simple terminal setae. Antenna (Fig. 5D) article-1 fused with body; article-2 0.8  × L:W, with one simple distal seta; article-3 1.3  × L:W, naked; article-4 2.7  × L:W, 1.9  × article-3, with one simple medial seta and three simple setae and two distal PSS; article-5 3.0  × L:W, 0.7  × article-4, with one distal seta; article-6 minute with five simple terminal setae. </p>
            <p>Labrum (Fig. 5E) large, hood-shaped, covered by minute setae on lateral and distal margins. Mandible (Figs 5F, G) broken during dissection; left mandible (Fig. 5F) with incisor smooth; right mandible (Fig. 5G) with at least two teeth on incisor process, molar broken off during dissection. Maxillule (Fig. 5H) endite with eight terminal spines (at least two serrate), outer margin with setules; palp broken off during dissection. Maxilla (Fig. 5I) ovoid and stout, with one side wider, but large relative to maxilliped. Labium (Fig. 5J) with distal corner finely setose.</p>
            <p>Maxilliped (Fig. 6A) basis with simple seta near articulation with palps, not reaching distal margin of endites; endites unfused, divided into three lobe-like structures, with one seta on distal edge; palp article-1 naked; article-2 with three inner (at least one serrate) and one outer setae; article-3 with three (two long, at least one serrate) inner setae; article-4 with four inner setae and one subdistal outer seta. Epignath not observed.</p>
            <p> Cheliped (Fig. 6B) calcified; basis attached to cephalothorax by large sclerite with dorsodistal setae; basis with long posterior lobe, not reaching pereonite-1, 3.9  × L:W; merus subtriangular, with one ventral seta; carpus stout 1.4  × L:W, with one ventral seta and one proximal and one dorsodistal setae, carpal shield well developed; propodus stout 0.9  × carpus, 1.6  × L:W, with an outer spine and five setae near dactylus insertion on inner side; fixed finger with two strong serrate spines ventrally; cutting edge with two simple setae and one spine; dactylus slightly shorter than fixed finger. </p>
            <p> Pereopod-1 (Fig. 7A) coxa with small seta; basis broad 1.8  × L:W, naked; ischium with seta; merus 1.3  × L:W, with ventrodistal seta and long serrate spine not reaching carpus distal margin; carpus 1.2  × L:W, about as long as merus, with ventrodistal long serrate spine, dorsodistal spine and ventral spinules; propodus 2.2  × L:W, 1.6  × carpus, with convex inferior margin with ventrodistal spine and microtrichia, one dorsodistal minute seta; dactylus 1.3  × unguis; together 0.8  × propodus. </p>
            <p> Pereopod-2 (Fig. 7B) coxa with a small seta (not drawn); basis broad 1.7  × L:W, with large dorsal PSS; ischium with one seta; merus 1.1  × L:W, with a ventrodistal seta and long serrate spine almost reaching carpus distal margin; carpus about as long as wide, about as long as merus, with ventral spinules, two unequal ventrodistal spines (one about half length of propodus) and dorsodistal spine; propodus 2.1  × L:W, 1.6  × carpus, with convex inferior margin with ventrodistal spine and microtrichia, one mid-dorsal simple seta and one dorsodistal minute seta; dactylus 1.1  × unguis, with one seta; together 0.7  × propodus. </p>
            <p> Pereopod-3 (Fig. 7C) similar to pereopod-2, except basis 1.9  × L:W, naked; dactylus 1.4  × unguis, naked. </p>
            <p> Pereopod-4 (Fig. 7D) basis about 2.3  × L:W, with large ventral PSS; ischium with two long setae; merus 1.3  × L:W, with two ventrodistal serrate spines; carpus 1.8  × L:W, with one seta and three (one long and two short) distal spines; propodus stout 2.4  × L:W, with two ventrodistal spines and one robust and one minute dorsodistal setae; dactylus long with double row of ventral spines, 2.4  × unguis, together 1.1  × propodus. </p>
            <p> Pereopod-5 (Fig. 7E) similar to pereopod-4, except basis 1.8  × L:W; ischium with two long setae (only one drawn); carpus 1.2  × L:W, with three distal spines; propodus 2.2  × L:W. </p>
            <p> Pereopod-6 (Fig. 7F) similar to pereopod-5, except basis 2.7  × L:W, naked; merus 1.4  × L:W; carpus 1.7  × L:W; propodus 2.6  × L:W, with three robust dorsodistal setae; dactylus with larger ventral spines, 2.6  × unguis. </p>
            <p>Pleopod (Fig. 7G) basal article naked; exopod with at least seven plumose setae on outer margin and one seta on inner margin; endopod with at least ten plumose setae and one more robust proximal seta on outer margin, large gap between most proximal.</p>
            <p> Uropod (Fig. 6C) rami reflexed; basis 1.4  × L:W, 0.6  × pleotelson, naked; exopod one-articled, 0.3  × endopod, with medial seta and tipped by two stout and one simple setae; endopod two-articled; article-1 with one distal seta; article-2 oar-shaped, with one long medial seta and two PSS and four simple distal setae. </p>
            <p>Type locality.</p>
            <p> São Paulo State, Brazil; stn D10 R3, -25,94725395, -44,83425777 (1906 m). </p>
            <p>Distribution.</p>
            <p> Brazil: Santos Basin (Rio de Janeiro,  São Paulo,  Paraná and Santa Catarina States). Occurring on the lower slopes and the  São Paulo Plateau area, ranging from depths of 991-1974 m. Twenty-two individuals of this species were collected, with 41% of them found in the 5-10 cm sediment layer (i.e. up to 50-60  × their body length) and 32% at a depth of 2-5 cm. </p>
            <p>Remarks.</p>
            <p> This new species resembles  S. hamicauda from the NE Atlantic by the oar-shaped uropod, but is different from it by: (1) cheliped fixed finger with two simple setae and one spine on cutting edge (three simple setae in  S. hamicauda ); (2) pereopods 1-3 dactylus 1.3  × unguis (about as long as in  S. hamicauda ); (3) uropod endopod oar-shaped (in  S. hamicauda the exopod is oar-shaped); and (4) exopod short, 0.3  × endopod length (in  S. hamicauda exopod reaching about 0.8  × endopod length). </p>
            <p> Stenotanais uropedon sp. nov. differs from  S. leonardoi by its oar-shaped uropod endopod, with the article-2 broad and flattened (with short exopod, 0.3  × endopod), whereas in  S. leonardoi , the exopod is slightly wider than the endopod (0.7  × endopod). Additionally,  S. uropedon has pereopods with the merus and carpus having long serrate distoventral spines, which are different from those of  S. leonardoi (with simple spines); however, these different forms could have been overlooked by previous authors in other congeneric species. </p>
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	https://treatment.plazi.org/id/10397355C51F598FB90B438E8AF64817	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.		Pensoft via Plazi	Segadilha, Juliana Lopes;Bird, Graham;Tavares, Marcos	Segadilha, Juliana Lopes, Bird, Graham, Tavares, Marcos (2023): Stenotanais (Crustacea, Tanaidacea) from the Santos Basin: the first described species of the family Akanthophoreidae off the Brazilian coast. Zoosystematics and Evolution 99 (2): 423-437, DOI: http://dx.doi.org/10.3897/zse.99.103003, URL: http://dx.doi.org/10.3897/zse.99.103003
