Xenisthmus chapmani
Xenisthmus chapmani (Schultz, 1966)


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Family:  Xenisthmidae (Collared wrigglers)
Max. size:  1.6 cm SL (male/unsexed)
Environment:  reef-associated; marine
Distribution:  Western Central Pacific: Vanuatu.
Diagnosis:  Dorsal spines (total): 5-5; Dorsal soft rays (total): 15-15; Anal spines: 1-1; Anal soft rays: 13-13. Description: Origin of anal fin is under base of second soft dorsal ray; both jaws with 1-2 rows of conical teeth; probably no teeth on vomer or palatines; maxillary oblique in position, vertical line through rear edge passing slightly in front of pupil; eye large at lateral in position, membraneously attached to skin around eye; 2 pairs of nasal openings, 1 dorsally at front of eye, the other next to upper lip; premaxillary not protractile; head naked and predorsal area probably naked (Ref. 609).
Biology: 
IUCN Red List Status: Data deficient (DD); Date assessed: 12 March 2015 Ref. (130435)
Threat to humans:  harmless


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