Philomedes rotunda Skogsberg 1920

• Main Authors: Chavtur, Vladimir G., Keyser, Dietmar
• Format: Other/Unknown Material
• Language: unknown
• Published: 2016
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Ostracoda; Myodocopida; Philomedidae; Philomedes; Philomedes rotunda; Antarctic; Prydz Bay; Rotunda; Seta; Antarc*
• Online Access: https://zenodo.org/record/6069981; https://doi.org/10.5281/zenodo.6069981

Philomedes rotunda Skogsberg, 1920 (Figs. 34, 35) 1920 Philomedes (Philomedes) rotunda Skogsberg: 366, 367, 368, 414, Figs. 75, 76. 1962 Philomedes rotunda Skogsberg, 1920 —Poulsen: 345 [key]. 1975 Philomedes rotunda Skogsberg, 1920 —Kornicker: 245–248, Figs. 131, 132 (map), 144–146. 1986 Philomedes rotunda Skogsberg, 1920 —Kempf: 590 (key). Studied material (coordinates, depth and sediment see Appendix). 52th Russian Antarctic Expedition Prydz Bay, station 7, sample 36: MIMB 18314 —adult female (2.37 mm). Station 8, sample 37: MIMB 18316—immature male (1.87 mm). Station 10, sample 54: MIMB 18 312—adult female (2.35 mm). Station 10, sample 55: MIMB 18 313—adult female (2.50 mm). Station 12, sample 65: MIMB 18 315—adult female (2.80 mm). Additional material. See Appendix. Diagnosis of female (Kornicker 1975, with additional remarks). Carapace: oval in lateral outline with minute caudal process, surface reticulate, length 1.90–2.80 mm. First antenna: 2nd joint with 3 setae, 1 ventral, 1 lateral and 1 dorsal. Second antenna: 1st joint of endopodite with 6 setae, 5 proximal and 1 distal; 2nd joint with 1 long and 0 (usually) or 1 (rarely) short ventral seta and 1 long terminal seta. Mandible: dorsal margin of basale with 3 setae, 1 near middle and 2 subterminal. Sixth limb: epipodite with 3–4 setae. Seventh limb: each limb with 15–26 setae, 2–5 pegs present on opposite terminal comb. Caudal furca: each lamella with 9–13 claws. Bellonci organ: 2-jointed, with pointed tip. Lateral eye: minute, with 2 ommatidia. Anterior process (above upper lip): developed, large and triangular. Male unknown. Supplementary description of adult female. Carapace (Figs. 34 A–E). Length 1.90–2.30 mm (in literature: 1.90–2.17 mm). Infold on rostrum with 10–14 setae forming a row. Antero-ventral inside with 10–16 setae and 9–11 striations. Posterior infold with 5–6 short setae. Surface reticulate and with very rare setae. First antenna (Fig. 34 I, J, M). Second joint with 3 spinous setae, 1 dorsal, 1 midlength seta and 1 long ventral seta. ...