Benthic myodocopid Ostracoda (Philomedidae) from the Southern Ocean Author Chavtur, Vladimir G. Author Keyser, Dietmar text Zootaxa 2016 4141 1 1 70 journal article 10.11646/zootaxa.4141.1.1 5f6dfb77-a313-4996-b2c8-1f944ab63ad7 1175-5326 260445 6033C3F3-85B8-4665-A7AF-7C0E4B230ABC Key to species of the genus Scleroconcha (only species south of 35°S included) For adult females (also for male A-1 of S. frons ; unknown for S. sculpta ) 1 Length of carapace shorter than 2.5 mm .................................................................... 2 - Length of carapace longer than 2.5 mm .................................................................... 4 2 Carapace with lateral ribs............................................................................... 3 - Carapace without lateral ribs....................................................................... S. wolffi 3 Second endopodial joint of antenna short, 7th limb without peg on opposite comb............................... S. pix - Second endopodial joint of antenna long, 7th limb with peg on opposite comb................................ S. flexilis 4 Rostrum on valves of carapace with ventral horn............................................................. 5 - Rostrum on valves of carapace without ventral horn.......................................................... 6 5 Terminal comb of 7th limb has 8 teeth with long marginal spines, caudal furca with 15+15 claws.................. S. solox - Terminal comb of 7th limb has 15–17 teeth with long marginal spines, caudal furca with 13+13 (14) claws........ S. arcuata 6 Terminal comb of 7th limb has bare teeth or pegs, base of Bellonci organ segmented................................. 7 - Terminal comb of 7th limb has alate teeth with short spines, base of Bellonci organ unsegmented....................... 8 7 Medial eye with 3 tubercles............................................................ S. tuberculata sp. nov. - Medial eye bare.............................................................................. S. gallardoi 8 Carapace elongated, with thin ribs................................................................ S. edentata - Carapace short, with thick ribs.................................................................. S. appelloefi