Stenogobius genivittatus (Valenciennes, 1837)

Stenogobius genivittatus (Valenciennes, 1837) View in CoL

Specimens analysed here, both with molecular and morphomeristic datasets, from various localities ( 13 specimens coming from Causse et al. (2023); 2 specimens from PNG and 25 from Ambon Is., West Java Is., East Java, West Bali Is., Lombok Is. and Papua) confirm the presence of S. genivittatus in Indonesia and its widespread distribution .

Originally supposed to be endemic to French Polynesia and then reported from South Africa to Hawaii, these occurrences extend the distribution of S. genivittatus in almost all tropical Indo-Pacific regions (the presence of S. genivittatus is unknown along the northern parts of the Indian Ocean). These congruent datasets allowed synonymising three species with Stenogobius genivittatus (Valenciennes, 1837) : Stenogobius blokzeyli (Bleeker, 1860) , Stenogobius beauforti (Weber, 1907) , and Stenogobius marinus Watson, 1991 , which were previously supposed to be endemic to Indonesia.

The main morphomeristic characters of S. genivittatus are given by Causse et al. (2023): D VI-I, 10-12 (mainly 11); A I-10/12 (mainly 11); C 11-15 (mainly 13); P 14-16 (mainly 15); PD 12-23; TRB 9-13; TRF 12-18; LS 45-52; ZZ caudal branched peduncle 8-9 (mainly 9); ZZ D2 base 7-10; predorsal length 30-52 (lengths in % of SL); head length between 19-39 (in % of SL); preanal length 49-77 (in % of SL); BDL 15-30 (in % of SL); BDM 15-29 (in % of SL); caudal peduncle length 7-17 (in % of SL); HD1 18-27 (female) to 18-31 (male) (in % of SL); jaw length 6-17 (in % of SL); anal length 31-55 (in % of SL); second dorsal 35-56 (female) 37-63 (male) (in % of SL); caudal peduncle depth 8-14 (in % of SL); space inter D1-D2 4-15 (in % of SL); eye diameter 2-10 v; interorbital distance 2-6 (in % of SL); snout length 5-11 (in % of SL); interdorsal membrane distance 1-7 (in % of SL); pelvic length 14-33 (in % of SL); pectoral length 13-33 (in % of SL). Cheek mainly naked, opercle scaled or not; central pectoral base scaled or not; breast and belly mainly scaled; predorsal region fully scaled on the anterior part to the first dorsal fin; first dorsal fin and pores and papillae are presented in Causse et al. (2023). Sexual dimorphism was not analysed.