Dorsal soft rays (total): 9; Anal soft rays: 5; Vertebrae:
27 - 28. Curculionichthys karipuna is distinguished
from all congeners, except C. sabaji and
C. paresi, by having an irregular concentration
of chromatophores that entirely cover the anal-fin
origin and adjacent region, and distal portions of
the first unbranched anal-fin ray (vs. absence of
such pigmentation pattern). It can be differentiated
from C. sabaji by the absence of dark-brown
spots scattered over the body (vs. presence); and
from C. paresi by the absence of contrasting
dark spots at the anterodorsal region of body (vs.
presence of such spots). It also differs from C.
insperatus, C. sabaji, C. paresi
and C. coxipone by having all papillae
randomly distributed throughout lower lip (vs. papillae
aligned in series that extends from the distal portion
of lower lip to dentary). It can be diagnosed from
C. insperatus and C. oliveirai by
having small, inconspicuous odontodes forming rows
on head and trunk (vs. presence of large, conspicuous
odontodes); from C. coxipone and C. oliveirai
by having a pointed profile of the anterior portion
of the head (vs. rounded profile); from C. paresi
by having 10-16 premaxillary teeth (vs. 6-10) and
10-14 dentary teeth (vs. 4-7); from C. sagarana
by the absence of an unpaired platelet on dorsal portion
of caudal peduncle (vs. presence). It can be distinguished
from C. coxipone by having 27-28 vertebrae
(vs. 29-30) and from C. oliveirai by having
7-8 lateral abdominal plates (vs. 4-5). Habitat:
Curculionichthys karipuna inhabits
two small, shallow, fast-flowing streams (Rio Cassiporé
and Rio Jari) bordered with marginal vegetation. Sections
of the stream of Rio Cassiporé have large rocks
and the vegetation has suffered high anthropic influence
causing intense penetration of light. The stream of
the Rio Jari has 1-meter deep water in which C.
karipuna lives associated to aquatic roots stuck
on the border.
Cassiporé and Rio Jari in northern Brazil.
Froese, R. and D. Pauly.
Editors. 2019. FishBase. World Wide Web electronic
publication. www.fishbase.org, ( 08/2019 ). Silva, G.S.C., F.F. Roxo, B.F. Melo and C.
Oliveira, 2016. New species of Curculionichthys
(Siluriformes: Loricariidae) from the eastern Guiana
Shield. Zootaxa 4175(3):281-291.