e are back to the South
American sub-continent for this months factsheet (October
2014) with a second look (first
April 2014, M. iheringi)
at these members of the Pseudopimelodidae family.Pseudopimelodinae is now of course considered
a full family status and is closely related to the
Pimelodidae family and as such mostly contains the
smaller pims, such as the South American Bumblebee
and dwarf marbled catfishes.
There can be confusion
between members of this genera, Microglanis
poecilus, M. secundus,
iheringi and M.
parahybae. There are diferences in colour patterns,
especially on the caudal peduncle, caudal fin and
anal fin areas.
anal fin view
Among the known
species in this genera, Microglanis cottoides
(Boulenger 1891) is especially interesting for phylogeographic
and genetic population studies, owing to its geographical
distribution in the Brazilian Atlantic Forest, being
present in the Uruguay River basin and along the eastern
coast of Brazil, with records of their occurrence
in drainages across the southern and southeastern
regions (Malabarba & Mahler, 1998; Shibatta, 2003b,
2007; Mori & Shibatta, 2006). These regions can
be considered of great biogeographical significance,
not only for the high degree of endemism of its fish
fauna (Bizerril, 1994, 1995), but also for being a
very populated area with high environmental degradation
due to human activities.
from U.K. aquarist Gareth Savage who keeps this species.
"They will not share a hide with anything. I've
witnessed them chasing each other around but never
locking jaws like M. heringi do. The weirdest
thing I've noticed is the dominant fish in the tank
shows the most colour just like with cichlids. I've
kept small fish in the tank with them and they have
been left alone. I think they like to be fed rather
than hunt there food, though this would be with caution."
To sum up, a very
nice looking pim, while being very nocturnal, but
being able to see them on the odd occasion makes up
for the weeks that you thought you had lost it, and
so a nice addition to a medium sized community tank.
South America: Laguna
dos Patos and rio Uruguay drainages in Brazil.
Rio Camaquã, Rio Grande do Sul, Brazil.
Dorsal spines (total): 1; Dorsal
soft rays (total): 6; Anal soft rays: 9 - 12; Vertebrae:
30. Distinguished from M. parahybae and M.
cibelae by the longer head (29.3-33.8% SL, versus
23.2-27.6 and 25.6-31.1 respectively) and wide body
(28.5-33.9% SL versus 23.8-27.7 and 25.4-29.8, respectively).
The smaller mouth width distinguish this species from
M. eurystoma (50.6-64.3% HL, versus 67.3-84.4).
Dark brown markings on a
light brown background. The area of dark brown colour
on the caudal peduncle is crescent shaped. Dorsal
fin clear with a dark brown band. The caudal fin
has a dark brown cross band. Anal
fin sports a dark brown cross band.
Care & Compatibility
cottoides is one
of twenty six, small to medium sized pims, found in
this family, and as such is a good addition to the
medium sized community tank, and will not harm the
occupants unless they are small enough to fit into
its mouth such as newly born fry and young fish.
Hiding places such as rockwork, plants and or wood
will benefit this species and help, along with regular
water changes, to keep this it happy in its surroundings
Males are slimmer than females.
Can be fed a varied diet of
tablet food, pellets, worm foods and frozen food such
fin:Fleshy finlike projection
without rays, behind the rayed dorsal fin. Anal fin: The median, unpaired, ventrally
located fin that lies behind the anus, usually on the
posterior half of the fish. Dorsal spines: The primary rayed fin(s)
on top of the body. Pectoral
paired fins just behind the head.
Micro = small; glanis = catfish.
R. and D. Pauly. Editors. 2016. FishBase.
World Wide Web electronic publication. www.fishbase.org,
( 06/2016 ). Ferraris, C.J. Jr., 2007. Checklist
of catfishes, recent and fossil (Osteichthyes: Siluriformes),
and catalogue of siluriform primary types. Zootaxa
1418:1-628. Malabarba, L.R. and
J.K.F. Mahler Jr.,
1998. Review of the genus Microglanis in the rio Uruguay
and coastal drainages of southern Brazil (Ostariophysi:
Pimelodidae). Ichthyol. Explor. Freshwat. 9(3):243-254.
Savage, Gareth: pers. comm. Souza-Shibatta,
Lenice, Ferreira, Dhiego Gomes, Oliveira, Claudio,
Almeida, Fernanda Simões de, Shibatta, Oscar
Akio, & Sofia, Silvia Helena. (2013).
Development and characterization of microsatellite
loci of Microglanis cottoides (Siluriformes: Pseudopimelodidae)
and cross-species amplification. Neotropical Ichthyology.