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Scientific Name Heptapterus longicauda  (Borodin, 1927)
Common Name
Type Locality Franca, Rio Grande, Province of São Paulo, southeastern Brazil.
Synonym(s) Imparfinis borodini
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Size 157mm or 6.2" SL. Find near, nearer or same sized spp.
Identification Deprá et al. (2022) redescribed the genus Heptapterus as having the following shared features: (1) Adipose fin extensively fused with the caudal fin; (2) caudal fin non-bifurcate (i.e., caudal fin not divided in two lobes; vs. bifurcate, with distinct dorsal and ventral lobes); (3) dark bars and stripes on back of trunk (vs. absence of dark bars and stripes on back of trunk); (4) 5-6 pairs of pleural ribs (vs. 8-9 ribs); (5) elongate body with a head length of 16.1-24.9% (vs. 25.5-27.3%); (6) posterior extension of mouth rim short, with rictus barely reaching vertical line through posterior nostril (vs. posterior extension of mouth rim longer, with rictus reaching vertical line between posterior nostril and eye); (7) premaxillary tooth plate with no posterolateral extension, or with a small one (vs. with a very long posterolateral extension); (8) pelvic-fin insertion posterior to vertical through insertion of dorsal fin (vs. anterior) and anal-fin insertion posterior to vertical through adipose-fin origin (vs. anterior); (9) 10-23 anal-fin rays (vs. 33-46); (10) anal and caudal fins separated (vs. anal fin confluent with the caudal fin); and (11) supraorbital pore 6 (s6) fused or closer to each other (vs. separate and closer to the eye than to each other).
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Distribution South America: Upper Paraná, São Francisco, and Tocantins River basins in Brazil.
São Francisco (click on these areas to find other species found there)
La Plata, Paraná, Paranapanema, Upper Paranapanema (click on these areas to find other species found there)
La Plata, Paraná, Upper Paraná, Grande (Parana basin) (click on these areas to find other species found there). Maps are currently offline pending redevelopment (July/August 2024).
IUCN Red List Category
Not Evaluated
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Breeding Reports There is no breeding report.
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Reference American Museum Novitates No. 266, pp 4, Fig. 3.
Registered Keepers There is no registered keeper.
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There is no record of this fish being seen.
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Heptapterus longicauda QR code LFS label creator
ARN ref:1.30.104.6609
Last Update 2023 Nov 19 07:03 (species record created: 2016 May 04 22:35)