Diastylis catalinae Alberico & Mühlenhardt-Siegel, 2010, n. sp.

• Main Authors: Alberico, Natalia, Mühlenhardt-Siegel, Ute
• Format: Other/Unknown Material
• Language: unknown
• Published: 2010
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Cumacea; Diastylidae; Diastylis; Diastylis catalinae; Seta; Weddell; Weddell Sea
• Online Access: https://zenodo.org/record/6208584; https://doi.org/10.5281/zenodo.6208584

Diastylis catalinae n. sp. (Figures 5−8) Material examined. R/V “Polarstern”. ANDEEP III (ANT XXII/ 3). East Weddell Sea, Sta. 81 −8, 70º 32.02´S, 14 º 35.05´W, 4392 m, 24 February 2005: 1 juvenile (ZMH K- 42180). West Weddell Sea. Sta. 110 −8, 64º 0.52´S, 43 º02.09´W, 4698 m, 10 March 2005: 1 subadult ♂ (paratype ZMH K − 42181). Sta. 121 −11, 63º 36.19´S, 50 º 37.15´W, 2657 m, 15 March 2005: 2 preparatory ♀♀ (holotype ZMH K − 42182; paratype 42183), 1 manca (paratype ZMH K − 42183). Diagnosis. Carapace, surface translucent, inferior margin serrated, anterior part with several teeth arranged in two non −uniform rows on each side of the pseudorostrum. Female: fourth article of antenna 2 with a minute seta, pereopods 3 and 4 with rudimentary exopods, telson with six −seven cuspidate setae on each side, uropod endopod of three articles. Description of the preparatory female (based on the holotype ZMH K − 42182) Total length: approximately 9 mm. Carapace (Figures 5 A, B), surface translucent, approximately 1.2 times as long as wide, inferior margin serrated, anterior part of carapace with several teeth arranged in two non −uniform rows on each side of it: one row extends backwards from the tip of the pseudorostrum and runs parallel to the frontal lobe fissure, the second row starts at middle of the other row of teeth, runs downwards perpendicular to it, and disappears a short distance before reaching inferior margin of carapace. Frontal lobe with three teeth. Ocular lobe wider than long, without lenses. Pseudorostrum approximately 6 times as long as ocular lobe length. Antennal notch shallow and smooth. Pereon (Figures 5 A, B) approximately 0.54 times as long as the carapace. Pereonites 1-3 subequal in length, pereonite 4 the longest, postero −lateral angles of pereonite 5 rounded in dorsal view and with one tooth each. Pleon (Figure 5 A) slightly shorter than cephalothorax, pleonites 2−5 with two small dorso −lateral teeth. Telson (Figure 8 C) approximately 1.7 times as long as last pleonite, with several small ...