Luciogobius Gill 1859

Diagnostic key for six nominal species of Luciogobius from Taiwan and the Matsu Islands, ROC: 1a Vertebral count 3................................................................. L. newtaipeiensis sp. nov. 1b Vertebral count more than 36........................................................................... 2 2a Pectoral fin with 1 or more upper free ray(s)............................................................... 3 2b Pectoral fin without any upper free rays....................................... L. opisthoprotus Chen & Liao 2024 3a Pectoral fin with 1 upper free ray........................................................................ 4 3b Pectoral fin with more than 1 upper free ray................................................................ 5 4a Pectoral fin modally 16; vertebral count 37–38..................................... L. matsuensis Chen et al. 2024 4b Pectoral fin modally 13; vertebral count 41............................................. L. chaojinensis sp. nov. 5a Second dorsal fin modally I/15; pectoral fin with 4 upper free rays; vertebral count 39.......... L. huatungensis sp. nov. 5b Second dorsal fin I/16; pectoral fin with 3 upper free rays; vertebral count 41........... L. dongyinensis Chen et al. 2024