Parachevreuxiella justi Lowry &amp; Stoddart 2011, sp. nov.
Creators: name: Lowry, J. K.
name: Stoddart, H. E.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Thoriellidae
Parachevreuxiella
Parachevreuxiella justi

description: <i>Parachevreuxiella justi</i> sp. nov. (Figs 8–10) <b>Type material.</b> Holotype, male, 21.5 mm, MV J15798, south of Point Hicks, Victoria, Australia, 38°27.20'S 149°09.70'E to 38°24.93'S 149°03.75'E, 1720 m over bottom depth of 1720–1800 m, rectangular midwater trawl, 22 July 1986, M.F. Gomon <i>et al</i>. on RV <i>Franklin</i>, stn SLOPE 24. <b>Type locality.</b> South of Point Hicks, Victoria, Australia, 38°27.20'S 149°09.70'E to 38°24.93'S 149°03.75'E, 1720 m over bottom depth of 1720–1800 m. <b>Etymology.</b> The species is named for Jean Just who recognised this specimen in the unsorted SLOPE material. <b>Diagnostic description.</b> <i>Head</i> much deeper than long, narrow, extending well below insertion of antenna 2, lateral cephalic lobe small, narrowly rounded; rostrum absent; eyes round. <i>Antenna 1</i> accessory flagellum absent; flagellum 22-articulate, with callynophore, but without aesthetascs; without calceoli. <i>Antenna 2</i> flagellum 22- articulate, without calceoli. <i>Epistome and upper lip</i> fused; produced into broad step. <i>Mandible</i> asymmetrical, incisors large, left with straight margin, minutely serrate, right with straight smooth margin; lacinia mobilis absent; accessory setal row absent; molar absent; mandibular palp absent. <i>Maxilla 1</i> inner plate tapering distally, with reduced row of pappose setae along medial margin; outer plate with 7 setal-teeth in modified 8/3 crown arrangement; palp large, 2-articulate, without apical setae. <i>Maxilla 2</i> inner plate very broad, with round lateral margin covered in long fine setae; outer plate narrow, tapering distally. <i>Maxilliped</i> inner plate large; outer plate large, subovate; palp vestigial, 1-articulate. <i>Gnathopod 1</i> weakly subchelate; coxa vestigial; basis short, broad; ischium short, length 1.1 × breadth; carpus short, length 1.3 × breadth, shorter than, (0.6 ×) propodus; dactylus simple, extremely reduced. <i>Gnathopod 2</i> minutely subchelate; coxa vestigial; dactylus vestigial. <i>Pereopod 3</i> coxa large; propodus without posterodistal spur; dactylus long, slender, curved. <b> <i>Pereopod 4</i> coxa deeper than wide</b> ; propodus without posterodistal spur; dactylus long, slender, curved. <i>Pereopod 5</i> coxa bilobate, posterior lobe strongly produced ventrally; basis linear; propodus without posterodistal spur. <i>Pereopod 6</i> coxa large, strongly lobate posteriorly; basis linear, slightly broader than basis of pereopod 5; propodus without posterodistal spur; dactylus long, slender, curved. <i>Pereopod 7</i> basis linear with slight posteroproximal bulge; propodus curved, without posterodistal spur; dactylus long, slender. <i>Epimeron 3</i> posteroventral corner narrowly rounded. <i>Urosomites</i> 1 and 2 free, 3 absent; urosomites 1 and 2 dorsally smooth. <i>Uropod 1</i> uniramous; <b>ramus</b> narrow, <b>length 5 × breadth and 0.7 × length of peduncle</b>. <i>Uropod 2</i> uniramous; <b>ramus</b> narrow, <b>length 7 × breadth, as long as peduncle</b>. <i>Uropod 3</i> absent. <i>Telson</i> absent. <b>Remarks.</b> <i>Parachevreuxiella justi</i> is very similar to <i>P. lobata</i> despite their great geographical separation. They can be distinguished by the deeper than wide coxa 4 in <i>P. justi</i> (wider than deep in <i>P. lobata</i> Andres, 1987) and in the ratios and shapes of uropods 1 and 2. <b>Distribution.</b> South-west South Pacific Ocean in 1720–1800 m depth.
description: Published as part of <i>Lowry, J. K. &amp; Stoddart, H. E., 2011, The new deep-sea families Cebocaridae fam. nov., Cyclocaridae fam. nov. and Thoriellidae fam. nov. (Crustacea: Amphipoda: Lysianassoidea), pp. 53-68 in Zootaxa 2747 (1)</i> on pages 63-65, DOI: 10.11646/zootaxa.2747.1.4, http://zenodo.org/record/5291255
description: {"references": ["Andres, H. G. (1987) Die Gammaridea der 76. Reise von FFS \" Walther Herwig \" mit Beschreibung von Parachevreuxiella lobata gen. n. und sp. n. (Crustacea: Amphipoda). Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut, 84, 95 - 103."]}