aqua 26(23-4)_Nasutoryzias
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SINGLE PAPER
Volume 26, Issue 3-4 – 30 November 2020
Tyson R. Roberts: Nasutoryzias ataranensis new genus and species, a Slender Adrianichthyid Fish with specialized oral and pharyngeal teeth and pectoral fins covered with Melanophores from the lower Salween basin, Myanmar, pp. 87-9
Description
SINGLE PAPER
Volume 26, Issue 3-4 – 30 November 2020
Tyson R. Roberts: Nasutoryzias ataranensis new genus and species, a Slender Adrianichthyid Fish with specialized oral and pharyngeal teeth and pectoral fins covered with Melanophores from the lower Salween basin, Myanmar, pp. 87-92
Abstract
The new genus and species described here from the Lower Salween basin in Myanmar, Nasutoryzias ataranensis, differs from other members of the beloniform family Adrianichthyidae in having upper and lower jaws equally projecting when mouth is closed, greatly enlarged central upper jaw teeth and tricuspid rather than simply conical pharyngeal teeth, mid-water swimming habits, pectoral fins uniformly covered with melanophores, and short pelvic fins. Food habits and reproductive behavior unknown. Sexual dimorphism apparently absent. Phyletic relations to other members of the family unknown but possibly close to slender-bodied species of Oryzias from India (including two newly discovered but still undescribed species) and Thailand.
