Abyssorchomene shannonae Hendrycks & Broyer 2022, sp. nov.

• Main Authors: Hendrycks, Ed A., Broyer, Claude De
• Format: Other/Unknown Material
• Language: unknown
• Published: 2022
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Amphipoda; Uristidae; Abyssorchomene; Abyssorchomene shannonae; Weddell Sea; Weddell; Argentine; Powell Basin
• Online Access: https://zenodo.org/record/6687280; https://doi.org/10.5281/zenodo.6687280

Abyssorchomene shannonae sp. nov. urn:lsid:zoobank.org:act: EEBF5622-BB6E-4CA5-9767-4CFE71A4ED9F Figs 26–34 Diagnosis Pereonites 1–7 and pleonites 1–2 with a weak but distinct dorsoposterior hump on each segment. Lateral cephalic lobe broadly rounded, dorsal and ventral margins nearly equally convex. Antennae 1–2 of male with calceoli, female without. Epistome level with the upper lip. Maxilla 1 palp, distal end weakly convex with distal conical spines contiguous. Maxilliped inner plate, distal margin nearly straight, strongly beveled, with a very slight concavity on outer half, with mediodistal extension surpassing outer corner; outer plate with strongly scalloped inner margin. Coxa 1 strongly widened distally, ~ 1.5–1.7 × proximal width. Gnathopod 2 propodus of female broad, anterodistal margin slightly expanded and protruding, length ~ 1.5× width, (different in form to narrow male propod), dactylus very small, inserted on the posterodistal one-third of the distal margin, palm with a distinct concavity. Coxa 5 distinctly posterolobate, posteroventral lobe broadly rounded, posterior margin evenly rounded. Pereopod 7 basis with anterior margin slightly concave, distal half of posterior margin with a steep, strong bevel. Uropod 1 peduncle long, about 1.6× length of outer ramus. Uropod 3 inner ramus extends past distal end of article 1 and reaches 20–25% length of article 2 of outer ramus. Telson cleft 55% of length, deeper in males. Etymology The species name is dedicated to Shannon Hendrycks, the wife of the first author for her continued enthusiasm and support over the many years of this and other amphipod studies. Material examined Holotype EASTERN WEDDELL SEA • ♀ (12 mm, mature, figured, appendages on 7 slides); RV Polarstern ANT XXII-3 (ANDEEP III), station PS67-78-1; 71°9.91′ S, 014°4.80′ W; depth 2194 m; gear, baited traps; 21 Feb. 2005; C. De Broyer and B. Danis leg.; ZMH K-61209. Allotype EASTERN WEDDELL SEA • ♂ (7 mm, figured, appendages on 6 slides); same collection data as for holotype; ZMH K-61210. ...