Dorsal spines (total): 2; Dorsal soft rays (total):
6-7; Anal soft rays: 13; Vertebrae: 40. Diplomystes
incognitus can be diagnosed from other species
of the genus Diplomystes by having the following
characters: skin of head, body, and fins densely covered
by round, short papillae giving the skin a blackberry-like
or verrucose aspect in large individuals; with a short
head, slightly squarish and as long as broad (vs.
slightly longer more triangular-shaped head); height
of dorsal fin, ca. 20% of SL (range 17-25%) and triangularly-shaped
(vs. slightly rhomboidal); maxilla with 7-9 teeth
(vs. 8-13 in D. chilensis, 11-3 in D.
and 12-19 in D.
camposensis; with 10 infraorbital
bones, as in D. nahuelbutaensis, but the
dorsalmost compound bone is absent; urogenital pore
and anus placed between posterior tips of pelvic fins
as in D.
chilensis (vs. urogenital pore and
anus placed between pelvic fins or in between the
distal tips of pelvics and anal fin); lack of pores
of axillary gland with occasionally four on one side
of body (vs. two or three pores).
America: Copequén and Tinguiririca
Rivers (Rapel Basin) and Maule Basin. Negro River
and tributaries in Argentina. Type locality:
Melado River, Andean region of Linares, Maule Basin,
Región del Maule, Chile, 35°430'10''S,
Arratia G, Quezada-Romegialli
C. (2017) Understanding
morphological variability in a taxonomic context in
Chilean diplomystids (Teleostei: Siluriformes), including
the description of a new species. Froese, R. and D. Pauly. Editors.
2018. FishBase. World Wide Web electronic publication.
www.fishbase.org, ( 06/2018 ). Diplomystes incognitus Arratia &
observed in Chile by labrigo (licensed under creativecommons.org).