Journal Article
A new genus and species of Sarcoglanidinae from the Rio Mamore, Amazon Basin, with comments on subfamilial phylogeny (Teleostei: Trichomycteridae)
de Pinna, M.C.C. and Starnes, W.C.
Record Number:
3035
Year:
1990
Journal:
Journal of Zoology
Pages:
75-88
Volume:
222
Abstract:
Stenolicmus surmienroi
is described as a new genus and species of the trichomycterid subfamily
Sarcoglanidinae, from the
Rio
Mamore Basin, Bolivia.
It
can be distinguished from all other
sarcoglanidines by: five-rayed pectoral fin; elongate body shape (HL about
15%
of
SL);
absence
of fontanelles on cranial roof; well-developed patches of opercular and interopercular odontodes
(five
or
six on each bone); numerous accessory caudal-fin rays
(13
dorsal and
I
I
ventral); and
presence of extensive dark pigmentation on the surface of the body. Three synapornorphies
support a hypothesis that the new taxon forms a monophyletic group with other sarcoglanidines:
presence of an anterior ossification of the palatine cartilage; quadrate with
a
dorsal expansion
directed posteriorly; and premaxilla with a long lateral process.
Stenolicmus
lacks some
synapomorphies shared by
Stauroglunis, Malacoglanis
and
Sarcoglanis,
and shares
some
other
synapomorphies exclusively with
Sarcoglanis
and
Malacoglanis.
These character distributions
make it uncertain whether
Stenolicmus
is the sister group of all other sarcoglanidines
or
only of
Malacoglanis
plus
Sarcoglanis,
because the two positions imply equally parsimonious clado-
grams.
Times Cited:
1
Relevent Species:
Related Records:
de Pinna, M.C.C. and Starnes, W.C. (1990)
A new genus and species of Sarcoglanidinae from the Rio Mamore, Amazon Basin, with comments on subfamilial phylogeny (Teleostei: Trichomycteridae)
Wosiacki, W.B., Coutinho, D.P. and De Assis Montag, L.F. (2011)Description of a new species of sand-dwelling catfish of the genus Stenolicmus
(Siluriformes; Trichomycteridae)