The lefteye flounder family Bothidae (Order Pleuronectiformes) of Taiwan Author Amaoka, Kunio Author Ho, Hsuan-Ching text Zootaxa 2019 2019-12-04 4702 1 155 215 journal article 24734 10.11646/zootaxa.4702.1.18 d2251320-5eef-450d-9703-2d2004e4962b 1175-5326 3562779 9108DB7D-3722-4F5C-BD76-F387E813BECB Key to genera of Bothidae in Taiwan 1A. First pelvic-fin ray on blind side opposite to second ray on ocular side; origin of pelvic fin on ocular side slightly behind tip of isthmus, their distance subequal to base length of pelvic fin on ocular side; lower part of urohyal truncate distally........................................................................................... Taeniopsetta (1 species) 1B. First pelvic-fin ray on blind side opposite to third or fourth ray on ocular side; origin of pelvic fin on ocular side at or near tip of isthmus; lower part of urohyal pointed distally............................................................ 2 2A. Mouth extremely large, maxillary length more than half of HL; end of upper jaw extend to or well behind posterior margin of eye................................................................................................. 3 2B. Mouth small to moderate large, maxillary length less than half of HL; end of upper jaw before posterior margin of eye..... 4 3A. Anterior tip of upper jaw extending beyond snout tip; pectoral-fin length on ocular side longer than HL..... Kamoharaia (1) 3B. Anterior tip of upper jaw not extending beyond snout tip; pectoral-fin length on ocular side shorter than HL.................................................................................................. Chascanopsetta (2) 4A. Eyes separated by a broad concave space; interorbital space wider in males than in females and in large specimens than small ones of same sex; rostral spine usually present in males....................................................... 5 4B. Eyes separated by a bony ridge or distinctly narrow anteriorly, no sexual dimorphism on interorbital space; no rostral spine.. .................................................................................................. 11 5A. First dorsal-fin ray elongate, lure-like, longer than and free from the second ray; gill rakers palmate...... Asterorhombus (2) 5B. First dorsal-fin ray shorter than second, connected to each other by fin membrane; gill rakers not palmate in shape........ 6 6A. Tip of isthmus below posterior margin of eye............................................................... 7 6B. Tip of isthmus below middle to anterior margin of eye........................................................ 8 7A. Body long elliptical, body depth <46.2% SL................................................... Parabothus (4) 7B. Body ovoid, body depth> 50% SL.......................................................... Tosarhombus (1) 8A. LLs> 76............................................................................................ 9 8B. LLs <61........................................................................................... 10 9A. Anterior dorsal-fin rays elongate; 3 clear ocelli on body....................................... Grammatobothus (2) 9B. Anterior dorsal-fin rays not elongate; no clear ocelli on body............................................ Bothus (3) 10A. Scales ctenoid, with long hair like spines on posterior margin; body dark brown, with a large dark blue blotch on blind side in males................................................................................. Crossorhombus (4) 10B. Scales ctenoid, with short spines on posterior margin; body greyish or greenish brown, light grayish on blind side in males........................................................................................ Engyprosopon (9) 11A. HL> 22% SL; vert. <45.............................................................................. 12 11B. HL <21% SL; vert.> 49.............................................................................. 13 12A. Upper-jaw length about equal to eye diameter; scales with long hair like spines on posterior margin............ Psettina (4) 12B. Upper-jaw length longer than eye diameter; scales cycloids or ctenoids with short spines on posterior margin.................................................................................................... Arnoglossus (6) 13A. Upper-jaw length 3.1–6.2% SL, lower-jaw length 5.6–7.8%, upper-eye diameter 4.8–6.2%; vert. 11–12+37–42=48–54.... 14 13B. Upper-jaw length 7.5–8.8% SL, lower-jaw length 10.2–11.5, upper-eye diameter 3.3–4.5; vert. 13+37–38=50–51................................................................................................... Neolaeops (1) 14A. Teeth present on both jaws of ocular side; upper-jaw length about equal to eye diameter; HL 18.1–20.6% SL.................................................................................................... Japonolaeops (1) 14B. Teeth absent on both jaws of ocular side; upper-jaw length much shorter than eye diameter; HL 14.9–17.6% SL...................................................................................................... Laeops (1)