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Scientific Name Tetranematichthys barthemi  Peixoto & Wosiacki, 2010
Common Name Barthem's Shoe Head Catfish
Type Locality Oriximiná, rio Araticum, rio Trombetas basin, 1°45'34.7"S, 56°22'35.5"W, Pará, Brazil.
Etymology Tetranematichthys: From the Greek tetra, meaning four, nema, meaning filament, and ichthys, meaning fish; in reference to the number of barbels. The specific epithet barthemi is a tribute to Ronaldo Borges Barthem, researcher of the MPEG, for his contribution to the field of ichthyology, in particular to fisheries ecology in the Amazon.
Hop to next section Species Information
Size 176mm or 6.9" SL. Find near, nearer or same sized spp.
Identification 1. Lateral margin of head at anterior portion of orbit, parallel to the posterior limit of operculum, in ventral view (Fig. 5a); ventral region light or dark colored; presence or absence of digit-like projections on distal portion of mandibular barbel; length of mandibular barbel 5.2- 2.6% HL; length of main ray of upper caudal-fin lobe 14.5- 20.5% SL; body width at pectoral-fin insertion 82.1- 110.0% HO; head length 24.4- 31.0% SL ..................................................2 1a. Lateral margin of head at anterior portion of orbit, diverging laterally to posterior limit of operculum, in ventral view (Fig. 5b); uniform colour pattern with dark patches along the body; presence of digit-like projections on distal portion of mandibular barbel; length of mandibular barbel 6.3-23.5% HL; length of main ray of upper caudal-fin lobe 18.1-19.9% SL; body width at pectoral-fin insertion 117.0125.0% HO; head length 28.5-32.3% SL ............................................. .............................................................. T. quadrifilis (rio Guaporé Basin) 2. Dorsal region without blurred light area; dark patches of pigmentation present along the body; ventral region dark-coloured; one light coloured stripe present on the caudal-fin; pelvic-fin without distinct light coloured stripe; anterior margin of mandibular barbel with digit-like projections; length of mandibular barbel 7.4-24.6% HL; snout length 41.2-49.3% HL; body width at pectoral-fin insertion 69.279.3% HL ................................................... T. wallacei (rio Tocantins, rio Orinoco and several stretches of the rio Amazon, except rio Guaporé) 2a. Dorsal region with blurred light area; dark patches of pigmentation absent along the body; ventral region light-coloured; two light-coloured stripes present on the caudal fin; pelvic-fin with distinct light coloured stripe; anterior margin of mandibular barbel serrated on distal portion; length of mandibular barbel 4.5-6.0% HL; snout length 28.834.5% HL; body width at pectoral-fin insertion 82.1-88.7% HL..................T. barthemi (rio Saracá, rio Araticum and rio Urubu).
Hop to next section Habitat Information
Distribution Lower Amazon, between the mouth of the rio Negro and the mouth of the rio Trombetas in Brazil.
Amazon, Lower Amazon (click on these areas to find other species found there)

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IUCN Red List Category Least Concern, range map and more is available on the IUCN species page. Last assessed 2018.
Hop to next section Husbandry Information
Breeding Unreported.
Breeding Reports There is no breeding report.
Hop to next section Further Information
Reference Neotropical Ichthyology v. 8 (no. 1), pp 70, Figs. 1-3, 5a.
Registered Keepers There is no registered keeper.
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Last Update 2019 Oct 13 03:34 (species record created: 2010 Mar 31 14:30)