Melanotaenia arguni Kadarusman, Hadiaty & Pouyaud, 2012

Family:  Melanotaeniidae (Rainbowfishes, blue eyes)
Max. size:  7.26 cm SL (male/unsexed)
Environment:  benthopelagic; freshwater
Distribution:  Asia: Indonesia.
Diagnosis:  Dorsal spines (total): 4-5; Dorsal soft rays (total): 12-16; Anal spines: 1-1; Anal soft rays: 20-24. Differs from other species of the genus Melanotaenia in the Bomberai Peninsula and Bird’s Neck region by the combination of the following characters: dorsal rays IV to V-I,12 to 16; anal rays I,20-24; lateral scales 34-37; transverse scales 10-11; predorsal scales 16-18; cheek scales 14-20; gillrakers 17-18; a short snout length, 8.3-9.1% of SL; a thin interorbital width, 8.3-9.0% of SL; a small eye diameter, 6.6-7.2% of SL; a thin body width, 11.0-13.0% of SL; a short and thin caudal peduncle (its length, 14.1-16.1 and depth, 10.0-10.8% of SL); a moderately long predorsal length, 36.8-39.7% of SL; a long preanal length, 49.7-52.9% of SL (Ref. 91054).
Biology:  The type locality, Jasu Creek in Egerwara village, is a stream characterized by less than 5 m width. Habitats in the vicinity of the type locality include shallow and slow flowing water over sandy substrate in secondary forest and cocoa plantations (Ref. 91054).
IUCN Red List Status: Endangered (EN); Date assessed: 03 December 2019 (B1ab(iii)) Ref. (130435)
Threat to humans:  harmless


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