Rhachotropis rossi Lörz, 2010, sp. nov.

• Main Author: Lörz, Anne-Nina
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2010
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Amphipoda; Eusiridae; Rhachotropis; Rhachotropis rossi; Antarc*; Antarctica; Ross Sea; Scott Island
• Online Access: https://doi.org/10.5281/zenodo.6204004; http://treatment.plazi.org/id/03B187EA126BFFFFFF0AFD6000AEFBCC

Rhachotropis rossi sp. nov. (Figs 9–12) Material examined . Holotype: NIWA 45813, ovigarous female, 11.8 mm, TAN0802/188, Brenke sled, 68°33.7’S, 178°22.19’W, 1 March 2008, 3210 m, Scott Island, Ross Sea, Antarctica. Etymology . Rhachotropis rossi sp. nov. is named after James Ross, the discoverer of the Ross Sea, where the species was collected. Diagnosis. Body delicate. Rostrum shorter than head. Eyes absent. Head twice as long as pereonite 1, lateral lobes strongly produced. Pereonites smooth. All pleonites bearing small dorsal processes, pleonite 1 and 2 additionally bearing very small dorsolateral processes. Pereonite 3 indented. Pereonite 3 and urosomite 1 with dorsal ridge. Urosomites 1–3 dorsolaterally smooth. Telson slightly cleft, triangular, long and narrow. Description of holotype . Antenna 1 broken off, with more than 10 articles. Antenna 2 article 3 of peduncle shorter than article 4, with several plumose setae; flagellum 18-articulate. Mandible with incisor process well developed, lacinia mobilis denticulate, molar process conical; palp article 1 short, less than a third length of article 2; article 3 longer than 2; articles 2 and 3 with long slender setae; 2 plumose setae at tip of palp. Article 2 of maxillipedal palp bearing epibiont. Maxilla 1 inner plate bearing 2 subterminal plumose setae; outer plate with 9 denticulate spines; article 2 of palp with several slender setae, especially at tip and with epibionts. Maxilla 2 inner and outer plate subequal in length; margins bearing stout and slender setae; inner plate wider than outer plate with several small plumose setae. Maxilliped outer plate nearly twice as long as inner plate, reaching half of second article of maxillipedal palp; inner margins of palp, outer plate and terminal end of inner plate setose. Inner plate, outer plate and maxillipedal palp bearing total of nine epibionts. Hypopharynx inner and outer lobe with terminal setae, outer lobe separated by wide gap. Coxa 1 produced, coxa 2–4 subquadrate. Gnathopods similar in shape, ...