Costa 1992, recently considered a synonym of T.
is not a member of the T. goeldii complex.
Its autopalatine has a short posterolateral process
and a weakly concave medial margin, and the premaxilla
is not folded. Trichomycterus longibarbatus
is also distinguished from species of the T. goeldii
complex and all other species of Psammocambeva
by having longer barbels, with the nasal barbel reaching
an area between the opercle and the pectoral-fin base,
often reaching the middle portion of the pectoral-fin
base (vs. reaching the middle portion of the opercle
as in T. alternatus or an area anterior to
it), and the maxillary barbel reaching an area posterior
to the pectoral-fin base (vs. reaching the pectoral-fin
base as in T. alternatus or more often an
area anterior to it as in most other trichomycterids).
In addition, T. longibarbatus differs from
all other trichomycterine taxa from eastern South
America by having a narrow and anteriorly expanded
interopercular dorsal process, thus assuming an axe-like
unique morphology. It also differs from all other
species of PAC by having a nearly straight premaxilla.
The present analysis indicates that T. longibarbatus
is a sister to a clade including all species of PAC.(Costa et al. 2022). Habitat:Near Santa Tereza, Espirito Santo State, Brazil.
Diet: Will feed on most aquarium
fare such as tablet, frozen and live foods. It is
an opportunistic predator that mainly feeds on insects,
but also will take small crustaceans and plant material
(algae and remains of phanerogams). Etymology:
longibarbatus, alluding to the long barbels.
Trichomycterus longibarbatus has most recently
been assessed for The IUCN Red List of Threatened
Species in 2018. It is listed as Least Concern.
South America:Near Santa Tereza, Espirito Santo State,
Brazil. Type locality: près
de la ville de Santa Tereza, Espirito Santo, Brazil.
Costa, W.J.E.M.; Mattos,
J.L.; Vilardo, P.J.; Amorim, P.F.; Katz, A.M.
Perils of Underestimating Species Diversity: Revisiting
Systematics of Psammocambeva Catfishes (Siluriformes:
Trichomycteridae) from the Rio Paraíba do Sul
Basin, South-Eastern Brazil †. Taxonomy 2022.
2, 491-523. de Pínna, M.C.C. and W. Wosiacki,
2003. Trichomycteridae (pencil or parasitic catfishes).
p. 270-290. In R.E. Reis, S.O. Kullander and C.J.
Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes
of South and Central America. Porto Alegre: EDIPUCRS,
Brasil. Ferraris, C.J. Jr., 2007. Checklist
of catfishes, recent and fossil (Osteichthyes: Siluriformes),
and catalogue of siluriform primary types. Zootaxa
1418:1-628. Froese, R. and D. Pauly. Editors.
2022. FishBase. World Wide Web electronic publication.
www.fishbase.org, ( 08/2022 ). Instituto Chico Mendes de Conservação
da Biodiversidade (ICMBio). 2022. Trichomycterus
longibarbatus. The IUCN Red List of Threatened Species