Pleojassa multidentata

• Main Author: Conlan, Kathleen E.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2021
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Amphipoda; Ischyroceridae; Pleojassa; Pleojassa multidentata; Antarc*; Antarctic
• Online Access: https://doi.org/10.5281/zenodo.4534325; http://treatment.plazi.org/id/03DFE565EA51D445FF133211D49EFBE1

Pleojassa multidentata (Schellenberg, 1931) (Fig. 27) Jassa multidentata Schellenberg, 1931, 251–253, Fig. 131; J. L. Barnard, 1958, 85; Lowry & Bullock, 1976, 75. Description of male. (Not type; MfN 22.962, South Georgia, Swedish Antarctic Expedition): Length 8.0 mm. Antenna 2 : overlapped by antenna 1 to midway along article 5; antenna 2, article 5 bearing simple setae only, these less than half the length of those of the female; flagellum 3 articles, article 1 86% of full flagellum length. Mandible : palp articles 2 and 3 without a dorsal fringe of setae; raker spines 4 right, 6 left. Gnathopod 1 : coxal margins, anterior 110% of dorsal length, ventral margin shallowly concave; basis, anterior and posterior margins not setose; carpus, length 75% of propodus length, posterior lobe 49% of anterior margin length, anterodistal setal cluster short, 18% of the anterior margin; propodus, palm convex, defining spine central. Gnathopod 2 : coxal margins, anterior 30% and posterior 72% of ventral length, ventral margin convex and slightly sinuous; carpus less than 1/4 the length of propodus, posterior lobe with a short distal seta; propodus, hinge tooth large, conical, not bifid, palmar setae sparse throughout, thumb 30% of article length, distally squared, tip with a minute defining spine, both inner and outer margins setose, posterior margin straight. Pereopod 3 : coxa, greatest depth posterior of centre; basis, anterior margin shallowly concave; merus, anterior margin with 2 clusters of setae, these setae shorter than article width, article width 95% of length; carpus 49% overlapped by the merus; propodus, width 36% of length. Pereopods 5–7 : setae and spines moderately abundant, basis posterodistally produced, anterior margin spinose; merus, posterior margin not spinose. Uropod 1 : peduncle, posteroventral spinous process underlying 38% of the inner ramus, inner and outer rami with 14 and 17 mid-dorsal spines respectively. Uropod 2 : peduncle, posteroventral spinous process underlying 27% of the inner ramus. ...