species has a relatively wide, albeit scattered, distribution
in the central and western portions of the Amazon
basin and possibly the southwestern portions of the
Río Orinoco basin. The type series of Denticetopsis
seducta that originated in the Río Ucayali
basin and in the region of Iquitos in northeastern
Peru, and the non-type population samples of the species
from the Rio Aripuanã in the rio Madeira basin,
Brazil agree in all examined features. Description:
A single specimen that originated in the upper Río
Napo in eastern Ecuador (ANSP 139105) and which is
tentatively identified as Denticetopsis seducta
has slightly higher number of total vertebrae (43)
than the 39 to 42 total vertebrae that occur in the
other examined specimens assigned herein to that species.
Additional population samples of Denticetopsis
from the upper Río Napo basin are necessary
to determine whether this specimen represents yet
another undescribed species.
Western Amazon River basin, and possibly southwestern
Orinoco River basin. Type locality:
Peru. Loreto: Caño “Sabalito,”
small creek on terra firma approximately 25 mi (=km)
S of Iquitos (4º14'45"S, 73º24'57"W).
22-28°c (71-83°f )
Vari, R.P., C.J. Ferraris,
Jr. and M.C.C. de Pinna
2005 The neotropical whale catfishes (Siluriformes:
Cetopsidae: Cetopsinae), a revisionary study. Neotrop.
Ichthyol. 3(2):127-238. Ferraris, C.J. Jr., 2007. Checklist
of catfishes, recent and fossil (Osteichthyes: Siluriformes),
and catalogue of siluriform primary types. Zootaxa