Philomedes heptathrix Kornicker 1975

• 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 heptathrix; Antarctic; Molodezhnaya; Seta; Antarc*
• Online Access: https://zenodo.org/record/6069972; https://doi.org/10.5281/zenodo.6069972

Philomedes heptathrix Kornicker, 1975 (Figs. 24–27, 28: A–G, Plate 2 E, F) 1975 Philomedes heptathrix Kornicker: 248–255, Figs. 131, 135 (map), 147–150. 1971 Philomedes species A—Kornicker,: 192, Fig. 17 (?). Non 1990 Philomedes heptathrix Kornicker, 1975 —Hartmann: 199, Abb. 1. Studied material (coordinates, depth and sediment see Appendix). 13 th Soviet (=Russian) Antarctic Expedition, Polar station “ Molodezhnaya ” cutting 1, station 3, sample 10: MIMB 18301 —immature male (1.67mm). RV “Polarstern”, ANT XV/3, station 171: ZMH-K-42266 and 42267—2 adult females (1.95 and 1.77 mm). 52th Russian Antarctic Expedition, station 10, sample 54: MIMB 18297 and 18298—2 adult females (2.0– 1.90 mm). Station 10, sample 56: MIMB 18 302—adult female (1.85 mm) and MIMB 18296—adult male (2.17 mm). Station 12, sample 65: MIMB 18 300—adult female (1.87 mm). Additional material. See Appendix. Diagnosis of female (Kornicker 1975, with additional remarks). Carapace: posterior rounded with narrow caudal process, length 1.60–2.02 mm. First antenna: 2nd joint with 3 setae, 1 ventral, 1 lateral and 1 dorsal. Second antenna: 1st joint of endopodite with 7–9 setae, 5–6 proximal and 2–3 distal; 2nd joint with 1 long and 3 or 4 (very rarely) short ventral setae and 1 long recurved terminal seta. Mandible: dorsal margin of basale with 6–7 setae, 4–5 near middle and 2 subterminal. Sixth limb: epipodite with 3 setae. Seventh limb: each limb with 9–13 setae, 4–5 distal and 5–8 proximal; 2–3 pegs present on opposite terminal comb. Caudal furca: each lamella with 10 (or rarely 11) claws. Bellonci organ: 1- or 2-jointed, with rounded tip. Lateral eye: small with 2–3 divided ommatidia. Anterior process (above upper lip): developed, with rounded tip. Diagnosis of male. Carapace: length 1.75–2.17 mm. First antenna: 2nd joint with 2–3 setae, 1 ventral, 0–1 lateral and 1 dorsal. Second antenna: 1st joint of endopodite with 5 setae, 4 proximal and 1 distal; proximal seta of 3rd joint about half of its length. Mandible: dorsal margin of basale with 5–6 ...