identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
FA135526FF8FFFCCFF7385DC7478F80C.text	FA135526FF8FFFCCFF7385DC7478F80C.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Amphithyrus bispinosus Claus 1879	<div><p>Amphithyrus bispinosus Claus, 1879</p> <p>Amphithyrus bispinosus Claus, 1879: 15; Siegel-Causey, 1982: 379; Vinogradov et al., 1996: 568, fig. 246; Brusca &amp; Hendrickx, 2005: 153 (list); García Madrigal, 2007: 159 (list); Gasca 2009: 90 (list); Lavaniegos &amp; Hereu, 2009: 152 (Appendix); Gasca et al., 2012: 126 (tab. 1); Valencia &amp; Giraldo, 2012: 1493 (tab. 1); Valencia et al., 2013: 52 (tab. 1); Zeidler, 2016: 32, 33 (key), fig. 9.</p> <p>Material examined. 19M, 51F from 17 stations (Fig. 1). TALUD I. St. 5 (ca. 23°16’ N, 107°31’W), December 11, 1989, 3M, 1F, BO from surface to ca. 200 m (TD&gt; 1500 m) (ICML-EMU-12869-A); St. 6 (23°15’54”N, 107°31’12”W), December 12, 1989, 1M, 9F, BO from surface to ca. 200 m (TD, 1550 m) (ICML-EMU-12869-B). TALUD III, St. 10B (23°43’24”N, 107°39’06”W), August 18, 1991, 1M, I-K from surface to 630 m (TD, ca. 900 m) (ICML-EMU-12870-A); St. 19 (25°12’00”N, 109°07’00”W), August 20, 1991, 1M, 2F, I-K, surface to 410 m (TD, 920 m) (ECO-CH-Z-10540); St. 19B (25°18’24”N, 109°18’36”W), August 20, 1991, 2F, I-K from surface to 600 m (TD, 1890 m) (ICML-EMU-12870-B); St. 25A1 (25°51’00”N, 109°57’00”W), August 21, 1991, 1F, I-K from surface to 200 m (TD, 1280‒1360 m) (ICML-EMU-12870-C). TALUD IV, St. 7 (22°00’22”N, 106°49’18”W), August 23, 2000, 2M, 7F, MN from surface to 500 m (TD, 1970 m) (ICML-EMU-12871-A); St. 15 (23°23’30”N, 107°47’48”W), August 24, 2000, 1F, MN from surface to 1500 m (TD, 2350 m) (ICML-EMU-12871-B); St. 22 (24°17’20”N, 108°50’30”W), August 26, 2000, 1F, MN from surface to 1325 m (TD, ca. 1800 m) (ICML-EMU- 12871-C). TALUD V. St. 5 (22°00’57”N, 106°40’00”W), December 13, 2000, 1M, 15F, MN from surface to ca. 1400 m (TD&gt; 1600 m) (ICML-EMU-12872); St. 29 (25°14’36”N, 109°24’15”W), December 17, 2000, 4M, 1F, MN from surface to 1290 m (TD, 2040 m) (ECO-CH-Z-10541). TALUD VI. St. 7 (22°21’39”N, 107°01’42”W), March 14, 2001, 1M, 5F, MN from surface to 1305 m (TD, 2100 m) (ICML-EMU-12873-A); St. 22 (24°17’34”N, 108°50’25”W), March 15, 2001, 1F, MN from surface to 1410 m (TD, 1760 m) (ICML-EMU-12871-B). TALUD XI. St. 6A (16°58’00”N, 100°57’00”W), June 7, 2007, 1M, 1F, MN from surface to 1400 m (TD, 1960 m) (ICML- EMU-12874-A); St. 19B (17°56’00”N, 103°10’00”W), June 9, 2007, 2M, 1F, MN from surface to 1490 m (TD, 1750 m) (ICML-EMU-12874-B). TALUD XII. St. 4 (16°59’39”N, 100°58’07”W), March 28, 2008, 1M, MN from surface to 1200 m (TD, 1995 m) (ICML-EMU-12875-A); St. 15C (17°27’51”N, 102°10’43”W), March 31, 2008, 1M, 2F, MN from surface to 1530 m (TD, 1880 m) (ICML-EMU-12875-B).</p> <p>Distribution. Circumoceanic, in warm waters of the Atlantic (south of 43°N), Pacific (South China Sea, Kuroshio Current, tropical eastern Pacific), and Indian (Bay of Bengal) Oceans; Mediterranean Sea; in the 200-300 m layer, often in surface layer (0-50 m) (Siegel-Causey 1982, Vinogradov et al. 1996). Off Australia (Zeidler 1998). In the eastern Pacific from off the west coast of Baja California, and from 28°30’N, in the Gulf of California, to off Gorgona Island, Colombia (García Madrigal 2007, Lavaniegos &amp; Hereu 2009, Valencia &amp; Giraldo 2012).</p> <p>Remarks. Siegel-Causey (1982) reported this species as relatively common in the Gulf of California. In the Mexican tropical Pacific it is relatively frequent and abundant (Gasca et al., 2012). It has been reported in association with the siphonophore Agalma elegans (Sars, 1846) (Harbison et al. 1977).</p> </div>	https://treatment.plazi.org/id/FA135526FF8FFFCCFF7385DC7478F80C	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.		MagnoliaPress via Plazi	Gasca, Rebeca;Suárez-Morales, Eduardo;Hendrickx, Michel E.	Gasca, Rebeca, Suárez-Morales, Eduardo, Hendrickx, Michel E. (2021): Hyperiids (Amphipoda, Hyperiidea) collected during the TALUD cruises in western Mexico. 5. Family Amphithyridae, with the description of a new species of Amphithyropsis Zeidler. Zootaxa 5039 (4): 479-494, DOI: 10.11646/zootaxa.5039.4.2
FA135526FF8EFFCAFF7383ED7081FF56.text	FA135526FF8EFFCAFF7383ED7081FF56.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Amphithyrus muratus Volkov 1982	<div><p>Amphithyrus muratus Volkov, 1982</p> <p>Amphithyrus muratus Volkov, 1982 in Vinogradov et al., 1982: 464, fig. 248; Vinogradov et al., 1996: 571, fig. 248; Gasca, 2009: 90 (list), 91; Gasca et al., 2012: 126 (tab. 1); Valencia &amp; Giraldo, 2012: 1493 (tab. 1); Zeidler, 2016: 32, 33 (key).</p> <p>Material examined. 5M, 6F from 8 stations (Fig. 2). TALUD III. St. 3B (22°36’36”N, 106°35’54”W), August 17, 1991, 1M, I-K from surface to 275 m (TD, ca. 650 m) (ICML-EMU-12876). TALUD IV. St. 7 (22°00’22”N, 106°49’18”W), August 23, 2000, 1M, 1F, MN from surface to 500 m (TD, 1970 m) (ECO-CH-Z-10542); St. 15 (23°23’30”N, 107°47’48”W), August 24, 2000, 1F, MN from surface to 1500 m (TD, 2350 m) (ICML-EMU-12877- A); St. 25A2 (24°54’N, 108°59’W), August 26, 2000, 1M, BS from surface to ca. 800 m (ICML-EMU-12877-B). TALUD VI. St. 7 (22°21’39”N, 107°01’42”W), March 14, 2001, 1F, MN from surface to 1305 m (TD, 2100 m) (ICML-EMU-12878-A); St. 22 (24°17’34”N, 108°50’25”W), March 15, 2001, 1M, MN from surface to 1410 m (TD, 1760 m) (ICML-EMU-12878-B); St. 29 (25°16’24”N, 109°24’54”W), March 16, 2001, 2F, MN from surface to 1440 m (TD, 2080 m) (ICML-EMU-12878-C). TALUD VII, St. 36 (25°42’37”N, 110°04’35”W), June 9, 2001, 1M, 1F, MN from surface to 1390 m (TD, 2400 m) (ICML-EMU-12879).</p> <p>Distribution. Pacific Ocean, in the Kuroshio Current and near Nasca Ridge (Vinogradov et al. 1996). In the eastern Pacific from the Gulf of California (north to 25°42’37”N) to off Gorgona Island, Colombia, and in the vicinity of the Nasca Ridge (Vinogradov et al. 1996, Valencia &amp; Giraldo 2012, present study).</p> <p>Remarks. Found at eight localities during this study although always in very low numbers, A. muratus had not been reported previously from the Gulf of California or from western Mexico. It features a remarkably wide distribution range, with the original description referring to material from the North Pacific (Kuroshio Current) and off Chile (Nasca Ridge). Considering present records and the material reported by Valencia &amp; Giraldo (2012) off Gorgona Island, about 28 km off the coast of Colombia, A. muratus appears to occur consistently in the eastern</p> <p>Pacific.</p></div> 	https://treatment.plazi.org/id/FA135526FF8EFFCAFF7383ED7081FF56	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.		MagnoliaPress via Plazi	Gasca, Rebeca;Suárez-Morales, Eduardo;Hendrickx, Michel E.	Gasca, Rebeca, Suárez-Morales, Eduardo, Hendrickx, Michel E. (2021): Hyperiids (Amphipoda, Hyperiidea) collected during the TALUD cruises in western Mexico. 5. Family Amphithyridae, with the description of a new species of Amphithyropsis Zeidler. Zootaxa 5039 (4): 479-494, DOI: 10.11646/zootaxa.5039.4.2
FA135526FF89FFCBFF7383FD708CFE82.text	FA135526FF89FFCBFF7383FD708CFE82.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Amphithyrus sculpturatus Claus 1879	<div><p>Amphithyrus sculpturatus Claus, 1879</p> <p>Amphithyrus sculpturatus Claus, 1879: 16; Siegel-Causey, 1982: 383; Vinogradov et al., 1996: 574, fig. 250; Brusca &amp; Hendrickx, 2005: 153 (list); García Madrigal, 2007: 159 (list); Gasca, 2009: 90 (list); Lavaniegos &amp; Hereu, 2009: 142 (tab. 1), 146 (tab. 2), 152 (Appendix); Gasca et al., 2012: 126 (tab. 1), 133 (tab. 4), 134; Lavaniegos, 2014: 5 (tab. 1), 8, 10 (tab. 4); Lavaniegos, 2017: 24; Valencia &amp; Giraldo, 2012: 1493 (tab. 1); Valencia et al., 2013: 52 (tab. 1); Zeidler, 2016: 32, 33 (key).</p> <p>Amphithyrus orientalis Stebbing, 1888: 1485‒1488.</p> <p>Material examined. 10M, 4F in 7 localities (Fig. 2). TALUD III. St. 19B (25°18’24”N, 109°18’36”W), August 20, 1991, 2M, 1F, I-K from surface to 600 m (TD, 1890 m) (ECO-CH-Z-10543); St. 25A1 (25°51’00”N, 109°57’00”W), August 21, 1991, 1M, I-K from surface to 200 m (TD, 1280‒1360m) (ICML-EMU-12880-A); St. 25A2 (25°50’54”N, 109°56’54”W), August 21, 1991, 1M, I-K from surface to 230 m (TD, 1250‒1328 m) (ICML-EMU-12880-B); St. 25B (25°43’18”N, 109°47’24”W), August 23, 1991, 1F, I-K from surface to 150 m (TD, ca. 1100 m) (ICML-EMU- 12880-C). TALUD V, St. 36 (25°54’30”N, 110°11’24”W), December 17, 2000, 1M, MN from surface to 1340 m (TD, 1990 m) (ICML-EMU-12881). TALUD VI, St. 36 (25°53’15”N, 110°10’06”W), March 17, 2001, 1F, MN from surface to 1360 m (TD, 2000 m) (ICML-EMU-12882). TALUD VII, St. 29 (25°17’31”N, 109°24’30”W), June 8, 2001, 5M, 1F, MN from surface to 1335 m (TD, 2080 m) (ICML-EMU-12883).</p> <p>Distribution. Atlantic (south of 40°N), Pacific (Kuroshio Current), and eastern Indian Oceans; Mediterranean and Red Seas; in the 0‒100 m layer (Vinogradov et al. 1996). Off Australia (Zeidler 1998). In the eastern Pacific from off the west coast of Baja California and the Gulf of California (north to 25°54’30”N) to off Gorgona Island, Colombia (García Madrigal 2007, Valencia &amp; Giraldo 2012, present study).</p> <p>Remarks. The material of station 36 of the TALUD V cruise represents a slight extension of the northernmost distribution limit of A. sculpturatus in the Gulf of California. Zeidler (1998) considered this species as uncommon although widely distributed, mainly in tropical waters.</p> <p>Siegel-Causey (1982) considered both A. orientalis Stebbing, 1888, and A. glaber Spandl, 1924, as junior synonyms of A. sculpturatus. However, A. glaber is currently recognized as a valid species (Vinogradov et al. 1996), while A. orientalis has indeed been synonymized with A. sculpturatus by Spandl (1927: 250) (see Shih &amp; Cheng 1995).</p> </div>	https://treatment.plazi.org/id/FA135526FF89FFCBFF7383FD708CFE82	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.		MagnoliaPress via Plazi	Gasca, Rebeca;Suárez-Morales, Eduardo;Hendrickx, Michel E.	Gasca, Rebeca, Suárez-Morales, Eduardo, Hendrickx, Michel E. (2021): Hyperiids (Amphipoda, Hyperiidea) collected during the TALUD cruises in western Mexico. 5. Family Amphithyridae, with the description of a new species of Amphithyropsis Zeidler. Zootaxa 5039 (4): 479-494, DOI: 10.11646/zootaxa.5039.4.2
FA135526FF88FFC8FF738690743EFE6D.text	FA135526FF88FFC8FF738690743EFE6D.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Paralycaea gracilis Claus 1879	<div><p>Paralycaea gracilis Claus, 1879</p> <p>Paralycaea gracilis Claus, 1879: 40; Siegel-Causey, 1982: 280; Vinogradov et al., 1996: 466, fig. 203; Brusca &amp; Hendrickx, 2005: 153 (list); García Madrigal, 2007: 162 (list); Gasca, 2009: 88 (tab. 1); Lavaniegos &amp; Hereu, 2009: 152 (Appendix 1); Gasca et al., 2012: 126 (tab 1), 136; Lavaniegos, 2014: 4 (tab. 1); Valencia &amp; Giraldo, 2012: 1491‒1496 (passim), 1492 (tab. 1), 1496 (tab. 3); Valencia et al., 2013: 51 (tab. 1); Gómez-Gutiérrez et al., 2014: 1019 (tab. 3); Zeidler, 2016: 36, figs. 11–12, 39 (key).</p> <p>Material examined. 7M, 3F from 6 stations (Fig. 3). TALUD III, St. 19 (25°12’00”N, 109°07’00”W), August 20, 1991, 1M, 1F, I-K, from surface to 410 m (TD, 920 m) (ECO-CH-Z-10544); St. 25A1 (25°51’00”N, 109°57’00”W), August 21, 1991, 2M, I-K from surface to 200 m (TD, 1280‒1360 m) (ICML-EMU-12884-A); St. 19B (25°18’24”N, 109°18’36”W), August 20, 1991, 2M, I-K from surface to 600 m (TD, 1890 m) (ICML-EMU-12884-B). TALUD VI. St. 7 (22°21’39”N, 107°01’42”W), March 14, 2001, 1F, MN from surface to 1305 m (TD, 2100 m) (ICML- EMU-12885). TALUD XI. St. 19B (17°56’00”N, 103°10’00”W), June 9, 2007, 1F, MN from surface to 1490 m (TD, 1750 m) (ICML-EMU-12886). TALUD XII. St. 15C (17°27’51”N, 102°10’43”W), March 31, 2008, 2M, MN from surface to 1530 m (TD, 1880 m) (ICML-EMU-12887).</p> <p>Distribution. Atlantic (south of 59°N), Pacific (Australia and New Zealand), and eastern Indian Oceans; Mediterranean (Vinogradov et al. 1996). The genus Paralycaea is widely distributed in tropical and temperate regions worldwide, mainly in near-surface waters (Zeidler 2016). In the eastern Pacific from off the west coast of Baja California and the Gulf of California (up to 28°N), north and south of Maria Madre Island, Mexico, and south to off Gorgona Island, Colombia (García Madrigal 2007, Valencia &amp; Giraldo 2012, Gómez-Gutierrez et al. 2014).</p> <p>Remarks. Paralycaea gracilis, previously included in the family Pronoidae (see Siegel-Causey 1982, Zeidler 1998), was recently moved to the family Amphithyridae described by Zeidler (2016).</p> </div>	https://treatment.plazi.org/id/FA135526FF88FFC8FF738690743EFE6D	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.		MagnoliaPress via Plazi	Gasca, Rebeca;Suárez-Morales, Eduardo;Hendrickx, Michel E.	Gasca, Rebeca, Suárez-Morales, Eduardo, Hendrickx, Michel E. (2021): Hyperiids (Amphipoda, Hyperiidea) collected during the TALUD cruises in western Mexico. 5. Family Amphithyridae, with the description of a new species of Amphithyropsis Zeidler. Zootaxa 5039 (4): 479-494, DOI: 10.11646/zootaxa.5039.4.2
FA135526FF8BFFC8FF7386FC72FDFBCC.text	FA135526FF8BFFC8FF7386FC72FDFBCC.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Paralycaea hoylei Stebbing 1888	<div><p>Paralycaea hoylei Stebbing, 1888</p> <p>Paralycaea hoylei Stebbing, 1888: 1570; Siegel-Causey, 1982: 283; Vinogradov et al., 1996: 466 (in synonymy of P. gracilis); Gasca, 2009: 88 (tab. 1); Gasca et al., 2012: 126 (passim) (tab. 1); Zeidler, 2016: 36, 39 (key).</p> <p>Material examined. 1M from one station (Fig. 3). TALUD III, St. 25A2 (25°50’54”N, 109°56’54”W), August 21, 1991, 1M, I-K from surface to 230 m (TD, ca. 1400 m) (ICML-EMU-12888).</p> <p>Distribution. Atlantic, off Africa (type locality), in surface waters (Stebbing, 1888). Central and southern Gulf of California (Siegel-Causey 1982, present study). Registered as “uncommon” in tropical Australian waters (Zeidler 1998). Registered as one of the most common species along the west coast of Mexico under the influence of El Niño (Gasca et al. 2012). Its true distribution remains largely unknown because of the taxonomic problems related to this species.</p> <p>Remarks. Paralycaea hoylei is now included in the family Amphithyridae (Zeidler 2016). Vinogradov et al. (1996) recognized only one valid species of Paralycaea, P. gracilis, thus considering both P. hoylei and P. newtoniana Bovallius, 1887 as junior synonyms of Stebbing’ species. Zeidler (1998: 85), however, established the validity of P. hoylei based on material collected in Australian waters. The status of P. newtoniana was further discussed by Zeidler (2016) (see comments in discussion).</p> </div>	https://treatment.plazi.org/id/FA135526FF8BFFC8FF7386FC72FDFBCC	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.		MagnoliaPress via Plazi	Gasca, Rebeca;Suárez-Morales, Eduardo;Hendrickx, Michel E.	Gasca, Rebeca, Suárez-Morales, Eduardo, Hendrickx, Michel E. (2021): Hyperiids (Amphipoda, Hyperiidea) collected during the TALUD cruises in western Mexico. 5. Family Amphithyridae, with the description of a new species of Amphithyropsis Zeidler. Zootaxa 5039 (4): 479-494, DOI: 10.11646/zootaxa.5039.4.2
FA135526FF8BFFC5FF73835D726DFD16.text	FA135526FF8BFFC5FF73835D726DFD16.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Amphithyropsis shanti Gasca & Suárez-Morales & Hendrickx 2021	<div><p>Amphithyropsis shanti sp. nov.</p> <p>(Figs. 4‒8)</p> <p>Type material. Holotype, 1 male, TALUD III. St. 19B (25°18’24”N, 109°18’36”W), August 20, 1991, I-K from surface to 600 m (TD, 1890 m) (ECO-CH-Z-10545). Allotype, 1 gravid female, TALUD IV, St. 25A2 (24°54’N, 108°59’W), August 26, 2000, BS from surface to ca. 800 m (ECO-CH-Z-10546).</p> <p>Type locality. <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-109.310005&amp;materialsCitation.latitude=25.306665" title="Search Plazi for locations around (long -109.310005/lat 25.306665)">Central Gulf of California</a>, SW of Topolobampo, Sinaloa (25°18’24”N, 109°18’36”W).</p> <p>Distribution. Known only from two localities, in the central Gulf of California, Mexico (Fig. 9).</p> <p>Etymology. The Sanskrit noun shanti means peace. It is feminine as the genus gender, which ending on the suffix – opsis is to be treated as feminine (Oren &amp; Schink 2016). In this way, we manifest our wish for world peace.</p> <p>Description of adult male.</p> <p>Body. Body (Fig. 4A) robust, weakly curved, total length, 2.66 mm. Surface of whole body sculptured with hexagonal and pentagonal polygons.</p> <p>Head. Longer than high, hemispheric, representing 0.15 x of total body length (0.40 mm), not notoriously deeper than body. Eyes (Fig. 4B) covering most of head surface except for triangular frontal space in front of head. Antenna 1 (Fig. 4C, 5A) prominent; peduncle 1-segmented, flagellum with large callynophore armed with transversally arranged rows of aesthetascs crossing the ventral zone, distal segment armed with spines and aesthetascs. Antenna 2 (Fig. 5B, C) peduncle with dorsally flat and ventrally round first segment, as high as long; succeeding four segments zig-zagged, folded below eyes and thorax; segments with row of setae along anterior margins; terminal segment with setae extending to the tip, directed anteriorly. Segment 3 about 0.75 x length of segments 2, terminal article about 0.83 x the length of precedent.</p> <p>Mandible (Fig. 5D) about 0.75 x length of first mandibular palp. Mandibular palp (Fig. 5E) 3-segmented, middle segment being longest (0.15‒0.20 x of segments 1 or 3 length).</p> <p>Maxilliped (Fig. 5F) fully sculptured, developed inner lobes completely fused, with two spines on the external apical margins (Fig. 5G). Maxillae sculptured; maxilla 1 inner lobe wide and truncated, outer lobe triangular with long apical spines; maxilla 2 both lobes pyramidal, about 2 x as long as maxilla 1, with spines both along inner margin and apically (Fig. 5H).</p> <p>Pereon (Fig. 4A) length about 2 x eyes diameter, all segments distinctly separate. Pereopods 1 and 2 (Fig. 6A, B) bases longer than combined length of distal segments; carpus sub-rectangular, lacking anterodistal projection; propodus with rounded, thumb-like antero-distal projection. Pereopod 1 simple (ca. 0.41 mm), with long slender basis, straight anterior margin, and bulging posterior margin; isquium bent to the front, forming the internal part of an elbow (similar in pereopods 1–4); propodus 0.4 x narrower than carpus, thumb-like in posterodistal section; dactylus claw-shaped, ornamented with teeth-like processes and short spines. Pereopod 2 like pereopod 1, about 1.2 x its length, basis 1.3 x length of basis of pereopod 1; propodus narrower than carpus, with thumb-like process on postero-distal end. Pereopods 3 and 4 (Fig. 6C, D) (0.7 mm) longer than 1 and 2 (ca. 0.50 mm). Pereopod 3 approximately 1.6 times as long as pereopod 1. Basis with weakly concave anterior margin and convex posterior margin; 70% wider than the widest portion of pereopod 1 basis. Pereopod 4 basis with straight anterior margin, posterior margin regularly convex, propodus almost 2 x as long as carpus, dactylus nearly half length of propus, bent backwards, with postero-proximal hump. Pereopod 5 (Fig. 6E) being the longest leg (about 1 mm), 2 x as long as pereopod 2, basis 2 x as long as wide, with anterodistal lobe overlapping ischium, inserted terminally to basis, bent towards posterior end; carpus and propodus with short spines along anterior margin (seen at 400 magnification); propodus long, slender; dactylus short (0.1 x propodus length). Pereopod 6 (Fig. 6F) basis longer than wide, with fissure but lacking telsonic groove; isquium inserted in ventral rounded socket of basis; merus dorsal margin approximately 0.5 length of anterior margin, with similar and regularly distributed spines along anterior margin; carpus about 0.5 x as long as merus width; propodus less than 0.5 carpus width; dactylus finger-shaped, 0.3 x propodus length. A strong structural union of isquium to basis appears like a separating segment. Pereopod 7 (Fig. 6G) basis more than 3.5 x as long as wide, plus one additional crinkled segment, about 0.2 mm total length. All coxae, except seventh, separate from thorax, coxae 1‒5 rectangular, with rounded margins; coxa 6 posteriorly expanded, with groove and spines on posterior margin.</p> <p>Pleon. Pleon (Fig. 4A) 1.3 x combined length of pereon segments; epimeral plates rounded, with slightly elongated distal margin, directed backwards (illustrated for female in Fig. 8G); pleonic segments with height similar to thoracic segments, projected downward. Third epimeron with median dorsal and lateral teeth. Pereon and urosome subequal in length (0.70 mm). Urosome first segment about as long as fused segments 2 and 3 (0.19 mm), shorter than telson (0.23 mm). Uropods maximum length about 1.35 x telson length; margins of uropod endopods and exopods serrate; endopod of uropod 3 fused with basis; uropod 1 ca. 0.50 mm long, exopod and basis sub equally long, with serrate margins, exopod 1.25 times as long as endopod, with both margins serrate; uropod 2 about 0.60 mm long, exopod 0.6 x uropod 2 total length, endopod about 0.5 x as long as exopod, with serrate margins specially on endopod; uropod 3 about 0.55 x uropod 1 length, endopod length 2/3 of total uropod 3 length (ca. 0.28 mm), inner and outer rami serrate along inner margins, especially apically. Telson not fused to urosome.</p> <p>Description of allotype female (gravid)</p> <p>Body (Fig. 4D) smaller than male (2.4 mm).</p> <p>Head. Higher than long (vs. longer than high in male), the longest part in the dorsal portion and not in the middle, head not as rounded as in male. Antenna 1 (Fig. 7A, B) 2-articulated, directed backwards; callinophore resembling a truncate cone, with several transverse tight rows of aesthetascs; terminal segment about 0.35 x preceding one, with distinctive thumb-like projection forming an incomplete “U”, armed with setae. Antenna 2 absent.</p> <p>Pereon. Pereopods (Fig. 8) similar to those of male, but with some variations: carpus of pereopod 1 wider proximally in female (Fig 8A); propodus of female pereopod 5 equally wide along segment (Fig 8E).</p> <p>Urosome and uropods (Fig. 7A) as illustrated.</p> <p>Remarks. Hitherto, the genus Amphithyropsis contained a single species, A. pulchellus, described from a male found off New Zealand, but it was not described in detail. Barnard (1930) pointed out some of its specific characteristics, like the reticulate cuticular sculpturing, and described and illustrated the 4th segment of pereopod 6, specifying that its structure “… seems to be quite distinctive”. Amphithyropsis pulchellus had so far been found in the southwestern Pacific, including waters around New Zealand and Australia and, as stated by Zeidler (2016), it also occurs along the southeast coast of Africa, where specimens show the same attributes as those from the Pacific.</p> <p>The specimens collected in the Gulf of California have the main distinctive generic features of Amphithyropsis but cannot be assigned to A. pulchellus because these specimens possess: 1) different segment proportions in the male antenna 2; 2) a shallower head; 3) pereopods lacking spines; 4) the basis of pereopods 1 and 2 longer than the combined length of distal segments; 5) the middle segment of the male mandibular palp longer than the others; and 6) a female first antenna with a thumb-like projection. All these characters allowed us to distinguish our material from A. pulchellus and propose a new species.</p> <p>Amphithyropsis shanti sp. nov. most closely resembles A. sculpturatus mainly in the body sculpturation, urosome and uropods shape, and in the general structure of pleonite VI. Amphithyropsis shanti sp. nov., however, is easily distinguished from this species by having segments 4‒6 of pereopods 1 and 2 more rectangular, segment 5 without anterodistal projection, and segment 2 longer than the combined length of distal segments. Amphithyropsis shanti sp. nov. also has the uropod 2 endopod about 0.5 x the length of the exopod, which is longer than basis, and the pleonite VII lacks segments 3‒5. The shape of the female antennae 1 is also a conspicuous distinctive characteristic between the two species.</p> </div>	https://treatment.plazi.org/id/FA135526FF8BFFC5FF73835D726DFD16	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.		MagnoliaPress via Plazi	Gasca, Rebeca;Suárez-Morales, Eduardo;Hendrickx, Michel E.	Gasca, Rebeca, Suárez-Morales, Eduardo, Hendrickx, Michel E. (2021): Hyperiids (Amphipoda, Hyperiidea) collected during the TALUD cruises in western Mexico. 5. Family Amphithyridae, with the description of a new species of Amphithyropsis Zeidler. Zootaxa 5039 (4): 479-494, DOI: 10.11646/zootaxa.5039.4.2
