Floresorchestia Bousfield, 1984

Suklom, Anotai, Keetapithchayakul, Tosaphol Saetung, Abdul Rahim, Azman & Wongkamhaeng, Koraon, 2022, Two new species of the genus Floresorchestia (Crustacea, Amphipoda, Talitridae) from Amphawa Estuary, Samut Songkhram Province, Thailand, Zoosystematics and Evolution 98 (2), pp. 285-303 : 285

Floresorchestia Bousfield, 1984

Orchestia floresiana group Bousfield, 1971: 267.

Floresorchestia Bousfield, 1984: 205.- Miyamoto and Morino 2008: 838.- Lowry and Springthorpe 2009: 121.

Type species.

Orchestia floresiana Weber, 1892, original designation.

Diagnostic description

(modified from Lowry and Springthorpe 2015, 2019). Antenna 1 short, not longer than article 4 of antenna 2 peduncle. Antenna 2 peduncular articles slender; article 3 without ventral process. Mandible left lacinia mobilis 4-5-cuspidate. Maxilliped palp article 2 distomedial lobe well developed, article 4 reduced, button-shaped. Gnathopod 1 subchelate; posterior margin of merus, carpus and propodus each with lobe covered in palmate setae. Gnathopod 2 subchelate; dactylus distally attenuated (except Floresorchestia papeari Lowry & Springthorpe, 2015). Pereopods 3-7 cuspidactylate. Pereopods 6-7 not sexually dimorphic. Pleopods all well developed, biramous. Epimera 1-3, 2-3 or 2 with slits just above ventral margins, vestigial on EP1 (except F. xeuli Tong, Hao, Liu, Li & Hou, 2021). Uropods 1 and uropod 2 not sexually dimorphic. Uropod 1 outer ramus without marginal robust setae. Uropod 2 outer ramus with marginal robust setae. Uropod 3 ramus subequal in length to peduncle. Telson with 3-7 robust setae.

Female (sexually dimorphic characters). Gnathopod 1 posterior margin of merus, carpus and propodus each without lobe covered in palmate setae. Gnathopod 2 mitten-shaped. Oostegites on gnathopod 2 to pereopod 5, setae straight.

Species composition.

Floresorchestia contains 27 species + 2 new species: F. amphawaensis sp. nov.; F. andrevo Lowry & Springthorpe, 2015; F. anomala (Chevreux, 1901); F. anoquesana (Bousfield, 1971); F. anpingensis Miyamoto & Morino, 2008; F. boonyanusithii Wongkamhaeng, Dumrongrojwattana & Pattaratumrong, 2016; F. buraphana Wongkamhaeng, Dumrongrojwattana & Pattaratumrong, 2016; F. floresiana (Weber, 1892); F. hanoiensis Hou & Li, 2003; F. kalili Lowry & Springthorpe, 2015; F. kongsemae Suklom, Danaisawadi & Wongkamhaeng, 2021; F. laurenae Lowry & Springthorpe, 2015; F. malayensis (Tattersall, 1922); F. mkomani Bichang’a & Hou in Bichang’a, Kioko, Liu, Li & Hou, 2021; F. oluanpi Lowry & Springthorpe, 2015; F. palau Lowry & Myers, 2013; F. papeari ; F. pectenispina (Bousfield, 1970); F. pohnpei Lowry & Myers, 2013; F. poorei Lowry & Springthorpe, 2009; F. pongrati sp. nov.; F. samoana (Bousfield, 1971); F. serejoae Lowry & Springthorpe, 2015; F. seringat Lowry & Springthorpe, 2015; F. thienemanni (Schellenberg, 1931); F. vitilevana (J.L. Barnard, 1960); F. xueli Tong, Hao, Liu, Li & Hou, 2021; F. yap Lowry & Springthorpe, 2015; F. yehyuensis Miyamoto & Morino, 2008.