Diancistrus mcgroutheri Schwarzhans, Møller & Nielsen, 2005
Mcgrouther's coralbrotula
photo by W. Schwarzhans et al.

Family:  Dinematichthyidae (Viviparous brotula)
Max. size:  4.7 cm SL (male/unsexed); 6 cm SL (female)
Environment:  reef-associated; marine; depth range 30 - 60 m
Distribution:  Western Pacific: northern Great Barrier Reef and along the southern part of Papua New Guinea.
Diagnosis:  Dorsal soft rays (total): 73-76; Anal soft rays: 56-61; Vertebrae: 41-41. The species is distinguished by having the following characters: Vertebrae 11+30=41, dorsal fin rays 73-76, anal fin rays 56-61; small eyes (1.5-2.1% SL); outer pseudoclasper with small ear-lobe extension opening inwards; inner pseudoclasper free from outer pseudoclasper, with supporter, forming a sharp, forward-inclined thorn; narrow scale patch on cheek, absence of scales on operculum; head profile slender; otolith length to height ratio 2.0-2.2 (Ref. 57884). Description: Characterized by depth of body at anal fin origin 17.3-18.7 (mean=18.0) % SL (Ref. 90102).
Biology:  Solitary inhabitant of coral reef crevices, cryptic (Ref 90102).
IUCN Red List Status: Least Concern (LC); Date assessed: 16 August 2019 Ref. (130435)
Threat to humans:  harmless

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