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Hoplomyzon papillatus Stewart, 1985

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Description: Distinguished from all known aspredinids by having five stout papillae along upper lip and mentum with two pairs of longer barbels and about 36 short, papillae-like barbels. Distinguished from all other species of Hoplomyzontini by having snout deeply emarginate at midline, appearing bilobed. Differs further from its only congener in having (1) no slender rictal barbel; (2) dorsal-fin rays i,3,i (vs. i,6); (3) maxillary barbel relatively short, not extending posterior to pectoral-fin origin (1 3% vs. 1 9.5% standard length, extending posteriorly beyond pectoral-fin origin); (4) lateral-line scutes in zig-zag pattern (vs. rela- tively straight line); (5) second pelvic-fin ray longest, extending posteriorly as short filament (vs. third ray longest and not extended); and (6) dorsal and anal fins attached posteriorly to body midline by membranes (vs. not attached). Habitat: Ecuador, Napo Province, Rio Aguarico,about 1 km upstream from confluence with Rio Shushufindi, lat. 0°17'S, long. 76°25.4'W. Etymology: The genus name Hoplomyzon: hoplo-, armed, referring to body “armed with six longitudinal series of bony bucklers”; myzon, to suck, presumably referring to resemblance to Asian (Exostoma) and neotropical (Astroblepus) catfishes (as noted by Myers) that have sucker mouths (a resemblance mainly due to adnate maxillary barbels in Hoplomyzon. The specific name papillatus: From the Latin , with buds, in reference to the numerous short, papillae like mental barbels.

Common Name:

None

Synonyms:

None

Family:

Aspredinidae

Distribution:

South America: Napo and Portuguesa River basins. Type locality: Rio Aguarico,about 1 km upstream from confluence with Rio Shushufindi, lat. 0°17'S, long. 76°25.4'W.

Size:

1.7cm. (¾ins)

Temp:

p.H.

Reference:

Burgess, W.E., 1989. An atlas of freshwater and marine catfishes. A preliminary survey of the Siluriformes. T.F.H. Publications, Inc., Neptune City, New Jersey (USA). 784 p.
Froese, R. and D. Pauly. Editors. 2022. FishBase. World Wide Web electronic publication. www.fishbase.org, version (04/2022).
Stewart, D.J. 1985. A review of the South American catfish tribe Hoplomyzontini (Pisces, Aspredinidae) with descriptions of new species from Ecuador. ResearchGate.

Family: Aspredinidae Back to Ident-A-Cat Click on Thumbnails

Hoplomyzon papillatus
Dorsal view

Hoplomyzon papillatus
Ventral view

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