Revised 17 Dec. 2022
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Ellopostoma Vaillant 1902 éllops (ἔλλοψ), a Greek word (often spelled helops) variously defined as meaning dumb, scaly, a fish (in general), and a large, rare and precious fish compared to or identified as a sturgeon; stóma (Gr. στόμα), mouth, referring to peculiar sturgeon-like mouth of E. megalomycter

Ellopostoma megalomycter (Vaillant 1902) megalo-, from mégas (Gr. μέγας), big; myktḗr (Gr. μυκτήρ), nostril, referring to its large nasal cavities, diameter ~1/3 of eye

Ellopostoma mystax Tan & Lim 2002 mýstax (Gr. μύσταξ), moustache, referring to dark margin over dorsal-anterior edge of snout