All FishesPseudopimelodidaeMicroglanis

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Scientific Name Microglanis nigripinnis  Bizerril & Perez-Neto, 1992
Common Name
Type Locality Rio Macacu, Cidade de Papucaia, Município de Cachoeira do Macacu, Rio de Janeiro, Brazil.
Type Locality Notes Latitude & longitude not provided in original description. Coordinates inferred from type locality text.
Etymology Micro - small, glanis - catfish - in reference to the rather small forms of catfish that this genus contains. Specific epithet: niger (black) and pinna (fin), in reference to the dark pigmented fins.
Hop to next section Species Information
Size 40mm or 1.6" SL. Find near, nearer or same sized spp.
Identification The genus Microglanis was described by Eigenmann (1912) to include small pimelodids with the head as wide as long, the skull covered by skin only; the occipital crest small; frontal fontanel not extending much if any behind the eye, and a minute occipital fontanel sometimes present; eye without a free orbital margin; dorsal and pectoral spines well developed; and premaxillary patches of teeth without backward projecting angles.

Caudal fin forked with lobes of equal size. Color: Body black with a light band running across the nape and another in the area between the end of the dorsal fin and the origin of anal fin [some specimens lack this second mark]. A small pale spot at the end of dorsal fin base. Head black with a ligth stripe on the cheeks. Ventral surface of the body white with some irregularly distributed melanophores. Caudal fin with black base and a dark bar in the middle. Pectoral fins completely black. Dorsal fin almost totally black, except for a small white patch at the base of the fifth and sixth branched rays. Adipose black with a pale dot at its origin. Anal and pelvice fins black with a light spot at. the base of the last four branched rays and with a white margin.
General Remarks According to Bizerril & Perez-Neto (1992), Microglanis nigripinnis is very similar in appearance to M. ater, differing mainly in having fewer anal fin rays (12 vs 15) and a longer dorsal spine (1.52 to 1.75 vs 2.4 in predorsal length) than M. ater. M. nigripinnis is sympatric with M. parahybae. The two spp. are easily distinguished by color pattern, but morphologically, the two spp. have the same number of anal fin rays and the shape of the tooth patch is very similar.
Hop to next section Habitat Information
Distribution South America: Macacu River basin in Rio de Janeiro, Brazil.
Rio de Janeiro State Rivers, Macacu (click on these areas to find other species found there)

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IUCN Red List Category Data Deficient, range map and more is available on the IUCN species page. Last assessed 2018.
Other Parameters In nature, M. nigripinnis was collected on slow flowing sections of small coastal rivers.
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Feeding The gut contents of two wild-caught specimens included exclusively Chironomidae larvae and pupa.
Furniture In nature, the fish hide under rocks or beneath dead wood during daylight.
Compatibility In nature, M. nigripinnis was collected with Hypostomus cf. punctatus, Otocinclus notatus, Parotocinclus maculicauda, Schizolecis guntheri, Rineloricaria cf. nigricauda, Microglanis parahybae, Acentronichthys leptos, Astyanax cf. hastatus, Jobertina interrupta, and Geophagus brasiliensis.
Breeding Reports There is no breeding report.
Hop to next section Further Information
Reference Revue française d'Aquariologie Herpétologie v. 18 (no. 4) [for 1991], pp 97, Figs. 1-2.
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Last Update 2021 May 03 05:02 (species record created: 2011 Sep 19 13:48)