Lonchopisthus ancistrus Smith-Vaniz & Walsh, 2017
Hook jawfish
photo by Schroeder, J. R.

Family:  Opistognathidae (Jawfishes)
Max. size:  8.9 cm SL (male/unsexed)
Environment:  pelagic-neritic; marine; depth range 110 - 220 m
Distribution:  Western Central Atlantic: only from the Gulf of Mexico and off Honduras.
Diagnosis:  Dorsal spines (total): 10-11; Dorsal soft rays (total): 12-13; Anal spines: 3-3; Anal soft rays: 11-12; Vertebrae: 26-27. This species is distinguished by the following set of characters: posterior end of maxilla is strongly hooked; membranes connecting maxilla and premaxilla and covering inner posterior part of dentary pale; D X-XI,12-13; A III,11-12; branched caudal-fin rays 11-13 (exceptionally 5); cheek and opercle are naked; oblique body-scale rows in longitudinal series 33-39; has a very long pelvic fins, 39.4-75.3% SL; with L. lemur, differs from congeners in lacking an inner premaxillary dark stripe and having fewer numbers of segmented dorsal and anal-fin rays and associated unbranched rays (Ref. 116588).
Biology: 
IUCN Red List Status: Data deficient (DD); Date assessed: 09 October 2018 Ref. (130435)
Threat to humans:  harmless


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