Journal Article
A review of the south American catfish tribe Hoplomyzontini (Pisces, Aspredinidae), with descriptions of new species from Ecuador
Stewart, D.J.
Record Number:
5549
Year:
1985
Journal:
Fieldiana: Zoology
Pages:
1036
Volume:
1360
Abstract:
Two new species of aspredinid catfishes belonging
to the tribe Hoplomyzontini were collected
on expeditions to the Rio Napo basin, eastern
Ecuador, in 1981 and 1983. Hoplomyzon papillatus,
new species, is distinguished from all known
aspredinids by having ( 1 ) five stout papillae along
the upper lip and (2) mentum with two pairs of
longer barbels and about 36 short, papillae-like
barbels; it differs further from all other species of
Hoplomyzontini by having the snout deeply emarginate
at midline. Ernstichthys intonsus, a new
species collected by trawling in the Rio Napo
mainstream, is distinguished from all known aspredinids
by having (1) a branched maxillary barbel
with about 15 threadlike secondary barbels;
(2) more than 100 slender barbels on mentum,
breast, and belly; (3) anterolateral branch of pelvic
bone expanded to form a superficial plate extending
anteriorly to meet a relatively short coracoid
process; and (4) dorsal fin i,7 (vs. dorsal fin i,l-6
in all other aspredinids). The tribe Hoplomyzontini
is revised, and a key to genera and species is
provided. Dupouyichthys Schultz is removed from
the synonymy of Hoplomyzon Myers, and Hoplomyzon
megistus Orces is reassigned to the genus
Ernstichthys Femandez-Yepez.
Times Cited:
1