Byblisoides monicae Peart 2018, n. sp.

• Main Author: Peart, Rachael A.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2018
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Amphipoda; Ampeliscidae; Byblisoides; Byblisoides monicae; Ross Sea; Antarc*; Antarctica
• Online Access: https://zenodo.org/record/5946783; https://doi.org/10.5281/zenodo.5946783

Byblisoides monicae n. sp. (Figs. 1–5) Type material. Holotype: NIWA 18651, ovigerous female (many eggs), 29 mm, Ross Sea, Antarctica, 75.6333°S 168.5333°E, 407 m, 17/01/1959, NZOI stn A460. Paratype: NIWA 126934, male, 25 mm, collected with holotype. No other ampeliscids were recorded from this station. Other material examined. NIWA 42763, 1 specimen, Ross Sea Antarctica, 75.6217°S 169.8045°E, 520–522 m, 14/02/2008, TAN0802/61, shelf, mud; NIWA 42765, 1 specimen, Ross Sea, Antarctica, 75.6205°S 169.8113°E, 520–522 m, 14/02/2008, TAN0802/61, shelf, mud. Ampelisca barnardi Nicholls, 1938 and an undescribed species of Ampelisca were also recorded from this station. Diagnosis. Anteroventral corner of head acute, produced to length of anterior margin of head. Antenna 1 short, reaching to three-fourths of antenna 2 peduncle article 4, flagellum with 3 articles. Coxa 1 ventral margin angled anteriorly, uneven. Pereopod 5 basis posterior margin uneven, sinuous. Pereopod 7 carpus anterior margin without plumose setae. Pereopod 7 basis posteroventral corner rounded. Uropod 2 inner ramus bearing marginal robust setae. Description. Based on holotype female, 29 mm length. Head anteroventral corner produced forward, reaching almost level with anterodorsal corner, anterior margin, excavate at antenna 2 insertion, antennal lobe concave, with 2 acute points, rostrum absent, head longer than deep, ventral margin straight. Antenna 1 short, reaching to just past half length of antenna 2 peduncle article 4; peduncle article 1 subequal in length to article 2 (1.1 ×), article 2 longer than article 3 (> 4 ×), article 3 shorter than article 1 (0.2 ×); flagellum shorter than peduncle, comprising of 3 articles (article 3 longest), ventral margin of peduncle article 1 and both margins of flagellum with long plumose, slender setae. Antenna 2 comparatively stout, reaching to just under half of body length; 1.8 × length of head; peduncular article 4 subequal in length to article 5, article 5 ventral and dorsal margin slightly serrate, ...