identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
03DA8782DB41FFFB2BF2FB9B5AABFC62.text	03DA8782DB41FFFB2BF2FB9B5AABFC62.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Orchestia mauritanica Momtazi & Myers & Knorrn & Moctar & Freiwald & Sonnewald 2025	<div><p>Orchestia mauritanica Momtazi &amp; Myers, sp. nov.</p><p>urn:lsid:zoobank.org:act: 8F4A9671-AD74-4158-AA58-77BACA1737A8</p><p>(Figs 2–5)</p><p>Diagnosis. Male gnathopod 2 propodus posterior margin distally straight with distinct proximal shelf; pereopod 7 with basis posterior margin lacking concavity, carpus expanded, irregular.</p><p>Material examined</p><p>Holotype: male (preserved in alcohol); 20.42 mm; Mauritania, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-16.675554&amp;materialsCitation.latitude=20.679443" title="Search Plazi for locations around (long -16.675554/lat 20.679443)">Cap Sainte Anne</a>; 20°40′46″ N, 16°40′32″ W; 3 March 2024; M. Sonnewald, A. Knorrn, S. Moctar &amp; A. Freiwald leg; hand collection at intertidal sandstones during low tide; Station BdL-61; Crustacea— SMF 62512.</p><p>Paratype: male (preserved in alcohol); 22.27 mm; Mauritania, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-16.675554&amp;materialsCitation.latitude=20.679443" title="Search Plazi for locations around (long -16.675554/lat 20.679443)">Cap Sainte Anne</a>; 20°40′46″ N, 16°40′32″ W; 3 March 2024; M. Sonnewald, A. Knorrn, S. Moctar &amp; A. Freiwald leg; hand collection at intertidal sandstones during low tide; Station BdL-61; Crustacea— IMROP 60 .</p><p>Type locality. Mauritania, Cap Sainte Anne.</p><p>Etymology. The species name “mauritanica ” is derived from the Latin name of the Islamic Republic of Mauritania, known for its species-rich marine ecosystems, such as the intertidal sandstones, which are inhabited by Orchestia mauritanica sp. nov. within the Banc d’Arguin National Park.</p><p>Description of male holotype (20.42 mm).</p><p>Head. Eyes round, moderate size (1/5 head length). Antenna 1 short, reaching beyond peduncular article 4 of antenna 2; the first peduncular article as long as the second and third ones, bearing three plumose and several robust setae; the second article has one plumose seta and several robust setae; accessory flagellum absent; primary flagellum of the left antenna with 6 articles, and the primary flagellum of the right antenna with 7 articles. Antenna 2 reaching the third pereonite; peduncular article 5 as long as the combined length of third and second peduncular articles; primary flagellum with 17 articles, final article cone-shaped, with imbricated setae virgula divina (Lowry &amp; Springthorpe, 2015). Labrum without epistome. Lower lip, distolateral setal tuft absent, with vestigial inner plates. Left mandible, lacinia mobilis with 5 cusps; molar triturative; incisor with 6 dentate; bearing 6 accessory blades and without palp. Right mandible, lacinia mobilis 5–cuspidate; incisor with 5 dentate; bearing 4 accessory blades and without palp. Maxilla 1 without palp; inner plate with two plumose setae; outer plate with 9 dentate setae; inner margin has several fine setae. Maxillae 2 outer plate equal to inner plate, covered apically with simple setae, outer margin with 6 simple setae; inner plate with apical robust setae and proximal blade setae. Maxilliped palp article 2 with distomedial lobe, article 4 small, button-shaped; inner plate reaches to the base of the second palp article, bearing 3 apical dentate setae and several plumose setae on apical and inner margins; outer plate subequal to inner plate and covered with simple setae.</p><p>Pereon. Gnathopod 1 subchelate, coxa smaller than that of coxa 2, with a small anterior ventral lobe, bearing stout marginal setae; the basis 0.82× as long as coxa; ischium quadrate; merus trapezoidal, carpus with round posterior-proximal lobe covered with palmate setae; propodus subquadrate with several robust setae on anterior margin and facial, posterior margin with palmate setae; palm sinusoidal, distinct a proximal protuberance covered with facial and marginal robust setae; dactylus shorter than palm. Gnathopod 2 subchelate; basis 2.67 × as long as broad; ischium with triangle lobe on antero-distal margin; merus with two robust setae on posterior margin; carpus triangular; propodus with four facial robust setae, weakly triangular, distal width 1.9 × proximal width, presence a distinct shelf in the middle length of posterior margin; palm distinct with prominent shelf at the beginning, straight with two rows of robust setae; dactylus overlapping palm.</p><p>Pereopods 3–7 bicuspidactylate. Pereopod 3 longer than pereopod 4, coxa with robust setae on ventral margin. Pereopod 4 coxa with robust setae on ventral margin. Pereopod 5 basis subovid, propodus 1.3 × long as carpus with marginal robust setae on the posterior lobe, basis subovoid. Pereopod 6 shorter than pereopod 7; coxa rounded, without marginal seta. Pereopod 7 basis posterior margin weakly serrate; merus elongate, weakly triangular, becoming 2 × as wide distally as proximally; carpus irregular, anterior margin strongly convex, posterior margin straight; carpus and merus subequal in length; propodus 1.2 × length of the carpus.</p><p>Pleon. Epimeron 1 subquadrate with straight posterior margin. Epimeron 2, posterior margin subconcave, postero–distal angle round. Epimeron 3 posterior margin straight, postero–distal angle round. Uropod 1 peduncle longer than rami, without distolateral robust seta; rami subequal, inner ramus with 3 marginal and 4 apical robust setae, outer ramus with 3 marginal and 3 apical robust setae. Uropod 2 peduncle subequal in length with subequal rami; outer ramus with 3 marginal robust setae and 3 apical robust setae; inner ramus with 6 marginal robust setae in two rows and 3 apical robust setae. Uropod 3 peduncle 1.2 times as long as broad, 1.3 times as long as ramus; ramus unarticulate, 2 times as long as broad, outer margin with 7 robust setae. Telson notched, with about 8 apical robust setae on each side.</p><p>Female not found.</p><p>Remarks. Orchestia mauritanica sp. nov. is a new North Atlantic Orchestia species group member. It belongs to a species group defined by Myers &amp; Lowry (2020b), including Q. aestuarensis Wildish, 1987, O. magnifica, Vecchi, 1931, and O. mediterranea Costa, 1853, which are characterized by irregular carpus in the seventh pereopod and extremely acute palm in the second male gnathopod. The straight distal posterior propodus margin and a distinct proximal shelf on the second male gnathopod and the lack of concavity on the posterior margin of the carpus in the seventh pereopod characterize the new species.</p></div>	https://treatment.plazi.org/id/03DA8782DB41FFFB2BF2FB9B5AABFC62	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	Momtazi, Farzaneh;Myers, Alan A.;Knorrn, Alexander Hans;Moctar, Sidi Mohamed M.;Freiwald, André;Sonnewald, Moritz	Momtazi, Farzaneh, Myers, Alan A., Knorrn, Alexander Hans, Moctar, Sidi Mohamed M., Freiwald, André, Sonnewald, Moritz (2025): Orchestia mauritanica sp. nov. (Amphipoda: Talitridae), a new sand hopper from Mauritania with a Comprehensive Key to the World Species of Orchestia. Zootaxa 5701 (5): 563-572, DOI: 10.11646/zootaxa.5701.5.5, URL: https://doi.org/10.11646/zootaxa.5701.5.5
03DA8782DB44FFF42BF2F9DE5D9EFE99.text	03DA8782DB44FFF42BF2F9DE5D9EFE99.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Orchestia Leach 1814	<div><p>Key to male Orchestia species of the world</p><p>1. Pereopod 7 carpus posterior margin substraight, scarcely concave or evenly convex................................. 4</p><p>Pereopod 7 carpus posterior margin markedly irregular and partially concave...................................... 2</p><p>2. Pereopod 7 basis flange on posterior margin with concavity............................. O. aestuarensis Wildish, 1987</p><p>Pereopod 7 basis flange on posterior margin lacking concavity................................................. 3</p><p>3. Gnathopod 2 propodus posterior margin distally straight with distinct proximal shelf.............. O. mauritanica sp. nov.</p><p>Gnathopod 2 propodus posterior margin sinuous and lacking distinct proximal shelf.......... O. mediterranea Costa, 1853</p><p>4. Uropod 3 ramus subequal in length to peduncle.................................... O. xylino Lowry &amp; Fanini, 2013</p><p>Uropod 3 ramus distinctly shorter than peduncle............................................................. 5</p><p>5. Pereopod 7 carpus anterior margin strongly crenulate......................................................... 6</p><p>Pereopod 7 carpus anterior margin not strongly crenulate...................................................... 7</p><p>6. Pereopod 7 carpus pyriform........................................................ O. montagui Audouin, 1826</p><p>Pereopod 7 carpus subovoid................................................... O. perezi Myers &amp; Lowry, 2020b</p><p>7. Pereopod 7 carpus almost as broad as long................................................................. 8</p><p>Pereopod 7 carpus longer than broad...................................................................... 9</p><p>8. Pereopod 7 basis posterior margin strongly serrate.......................................................... 10</p><p>Pereopod 7 basis posterior margin weakly notched.......................................................... 11</p><p>10. Gnathopod 2 propodus almost as broad as long, palm strongly convex................ O. tabladoi Myers &amp; Lowry, 2020b</p><p>Gnathopod 2 propodus longer than broad, palm weakly convex..................... O. inequalipes (K.H. Barnard, 1951)</p><p>11. Pereopod 7 merus almost parallel-sided...................................... O. forchuensis Myers &amp; Lowry, 2020b</p><p>Pereopod 7 merus triangular............................................................................ 12</p><p>12. Gnathopod 2 propodus subovoid, palm moderately oblique, convex...................... O. gammarellus (Pallas, 1766)</p><p>Gnathopod 2 propodus pyriform, palm very oblique, straight............................... O. magnifica Vecchi, 1931</p></div>	https://treatment.plazi.org/id/03DA8782DB44FFF42BF2F9DE5D9EFE99	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	Momtazi, Farzaneh;Myers, Alan A.;Knorrn, Alexander Hans;Moctar, Sidi Mohamed M.;Freiwald, André;Sonnewald, Moritz	Momtazi, Farzaneh, Myers, Alan A., Knorrn, Alexander Hans, Moctar, Sidi Mohamed M., Freiwald, André, Sonnewald, Moritz (2025): Orchestia mauritanica sp. nov. (Amphipoda: Talitridae), a new sand hopper from Mauritania with a Comprehensive Key to the World Species of Orchestia. Zootaxa 5701 (5): 563-572, DOI: 10.11646/zootaxa.5701.5.5, URL: https://doi.org/10.11646/zootaxa.5701.5.5
