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Hemipsilichthys cameroni, photo by K.S. Cummings
Hemipsilichthys nudulus, from Reis and Pereira 1999
Hemipsilichthys gobio, photo by J.W. Armbruster
Hemipsilichthys vestigipinnis, photo by K.S. Cummings
H. bahianus (Gosline 1947)
H. cameroni (Steindachner 1907)
H. calmoni Steindachner 1908 2
H. cerosus Miranda Ribeiro 1951
H. garbei Ihering 1911
H. gobio (Lütken 1874)
H. luderwaldti (Miranda Ribeiro 1918)
H. nudulus Reis and Pereira 1999
H. regani (Giltay 1936) 3
H. splendens Bizerril 1995
H. steindachneri Miranda Ribeiro 1918
H. stephanus Oliveira and Oyakawa 19990
H. vestigipinnis Pereira and Reis 1992
1 Additional species
have recently been described, but I do not yet have the publications or
2 An unnecessary correction for H. cameroni. Considered to be a synonym of H. cameroni.
3 Considered a synonym of H. cameroni by Pereira and Reis (1992)
Hemipsilichthys are small- to medium-sized loricariids.
Color pattern is usually dark brown and mottled with the abdomen white
(there is mottling on the lower surface of the caudal peduncle in some
species). Abdomen naked. Caudal fin straight, angled posteroventrally
to slightly emarginate. Four or more predorsal plates. At least
a single column of plates on the caudal peduncle where there are only three
rows of plates. Canal plate large with the ventral border deflected under
the head. Eyes typically small. Dorsal fin short, never reaching
the adipose fin. In one species, H. vestigipinnis, the adipose
fin is nearly absent.
The following does not apply to Hemipsilichthys gobio. Hemipsilichthys
can be distinguished from all but Isbrueckerichthys, Delturus, Pogonopoma,
Pseudorinelepis, and Upsilodus and some Loricariinae by a combination
of a lack of evertible cheek plates and elongated odontodes along the snout
margin in breeding males. Hemipsilichthys differs from Isbrueckerichthys
by lacking small, embedded plates on the abdomen, from Delturus
by lacking a postdorsal ridge, from
Pogonopoma and Pseudorinelepis
by lacking plates on the abdomen and having three (vs. five or more) rows
of plates in at least one column on the caudal peduncle, and from Loricariinae
by having an adipose fin and lacking an elongate, flattened caudal peduncle
that is rectangular in cross-section. Non-breeding males, females,
and juveniles can be separated from Pareiorhina by the presence
of an adipose fin, from Upsilodus, Corymbophanes, and Delturus
by a lack of a postdorsal ridge, from Kronichthys by having a wider
body (vs. cigar-shaped) and by having the sphenotic in contact with the
sixth infraorbital externally, from Neoplecostomus and the Rhinelepis
group, by a lack of plates on the abdomen, from most the Rhinelepis
group, the Pterygoplichthys group, and Hypostomus by having
more than three predorsal plates and a rectangular (vs. triangular) dorsal
fin spinelet, and from the Pterygoplichthys group and Ancistrini
by a lack of evertible odontodes on the cheek.
Reis, R.E. and E.H.L. Pereira. 1999. Hemipsilichthys
nudulus, a new, uniquely-plated species of loricariid catfish from
the rio Araranguá basin, Brazil (Teleostei: Siluriformes).
Ichthyol. Explor. Freshwaters: 10:45-51.