Hansenomysis sorbei Vicente, 2009, n. sp.

• Main Author: Vicente, Carlos San
• Format: Other/Unknown Material
• Language: unknown
• Published: 2009
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Mysida; Petalophthalmidae; Hansenomysis; Hansenomysis sorbei; Bellingshausen Sea
• Online Access: https://zenodo.org/record/6213384; https://doi.org/10.5281/zenodo.6213384

Hansenomysis sorbei n. sp. (Figs. 1–5) Material examined. Holotype (ICMM 1 / 2009). Mature female, 24.3 mm TL. Stn. 26 TA, Bellingshausen Sea, 70 º 14 ’ 14 ”S – 81 º 46 ’07”W, 1869 m depth, 10–50 cm water layer above bottom, sediment with a low organic matter content (2.0%) and a high percentage of fine sand (49.4 %), 20 January 2006. Paratypes (ICMM 2 / 2009). Five immature females (18.5 mm TL, 6.6 mm CL, 14.5 mm TL, 12.1 mm TL and 4.3 mm CL), same locality. Diagnosis. Hepatic region of the carapace with a strong bollard-like process. Antennal scale lanceolate, armed with a row of 5–8 evenly graduated spines. Posterior margins of abdominal somites 4 to 6 produced into five strong spines. Exopod and endopod of uropod sub-equal in length and extending to the apex of telson. Description. The morphological characteristics refer only to females, male is unknown. Body robust, elongate (Figs. 1 A, B). Carapace without spines, leaving the two posterior thoracic somites exposed in dorsal view; anterior margin rounded without rostrum; antero-lateral corners slightly produced, not projecting beyond the carapace anterior margin. In the median line, one small keel near the anterior margin, rectangular in shape in lateral view. Two strong bollard-like process projects forward from the hepatic region. Posterior to the sulcus, carapace almost parallel and raised into two keels that converge posteriorly and run forward on each side (Figs. 1 A, B). Tergum of the anterior margin of thoracic somites 7 and 8 produced forward and overlapping the preceding somite. Tergum of abdominal somite 1 thickened and produced backward, more or less covering the second abdominal somite. Abdominal somites 2–5 increasing regularly in length distally; somite 6 twice as long as the preceding one. The posterior margins of abdominal somite 3 produced into three strong spines: one dorsal and one pair on lateral angles. The posterior margins of abdominal somites 4 to 6 produced into five strong spines: one dorsal, one pair on lateral angles and other ...