Didymothallus nudigena Schwarzhans & Møller, 2011
Didymothallus nudigena
photo by W. Schwarzhans & P. R. Møller

Family:  Dinematichthyidae (Viviparous brotula)
Max. size:  5.1 cm SL (male/unsexed); 6.6 cm SL (female)
Environment:  benthopelagic; marine
Distribution:  Eastern Indian Ocean: NW Australia.
Diagnosis:  Dorsal soft rays (total): 78-90; Anal soft rays: 57-69; Vertebrae: 40-43. This species is distinguished by the following characters: vertebrae 12+28-31=40-43; rays on dorsal fin 78-90, anal fin 57-69, V in D 1.9-2.3; head with few small, non-imbricate scales on upper cheeks only; single (outer) pseudoclasper wing-shaped with two slender supporters, anterior supporter shorter than posterior one with small distal appendix on inner face, posterior supporter curved, hockey-stick shaped; otolith with undivided short sulcus, its centre anterior to centre of otolith, sulcus not inclined, otolith length to otolith height 2.25-2.35, otolith length to sulcus length 1.9-2.1 (Ref. 88966).
Biology: 
IUCN Red List Status: Least Concern (LC); Date assessed: 16 August 2019 Ref. (130435)
Threat to humans:  harmless


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