All Fishes ⇒ Loricariidae ⇒ Hypoptopomatinae ⇒ Acestridium  |  | 

  • Acestridium triplax
  • Acestridium triplaxVentral view
  • Acestridium triplaxDorsal view
  • Acestridium triplaxPectoral fin spine
  • Acestridium triplaxLateral view
  • Acestridium triplaxDorsal view
  • Acestridium triplaxClose-up of caudal fin
  • Acestridium triplaxDorsal view
  • Acestridium triplax
  • Acestridium triplaxClose-up of rostrum
  • Acestridium triplaxClose-up of ventral plates
  • Acestridium triplax
  • Acestridium triplax
Hop to next section All Fishes Data Sheet
Scientific Name Acestridium triplax  Rodriguez & Reis, 2007
Common Names Emerald Whiptail Catfish
Whiptail Catfish, Smaragdgrenmalle (Denmark)
Type Locality Municipio de Juruti, igarapé Mutum, tributary to rio Aruã, a tributary to rio Branco, a tributary. to rio Aripiuns, itself a tributary to the lower rio Tapajós, 2°36'45''S, 56°11'37''W, Pará State, Brazil.
Etymology The species epithet triplax from the Greek tri, three, and plax, plate, referring to the three series of abdominal plates.
Hop to next section Species Information
Size 56mm or 2.2" SL. Find near, nearer or same sized spp.
Identification Acestridium was diagnosed by Schaefer (1991) based on the following characters: ten principal caudal-fin rays; plates at anterior snout margin forming conspicuous spatulate projection; head and body very slender, depressed; dorsal surface of head and trunk with longitudinal ridges; dorsal fin placed posteriorly, well beyond pelvic fin and just anterior to anal-fin origin; adipose fin absent; dermal plates anterior to first dorsal-fin proximal radial expanded, bearing ventromedial keel contacting the dorsal margin of the neural arches of the vertebrae six through twelve; and ridge of bone on the ventral surface of the lateral ethmoid contacting the metapterygoid channel reflected mesially.

A. triplax can be distinguished from all its congeners by having one series of middle abdominal plates between the lateral abdominal plates (vs no abdominal plates between the lateral abdominal plates).
Sexing Males of Acestridium triplax have conspicuous urogenital papilla, immediately posterior to anal opening, these are not present in females.
Hop to next section Habitat Information
Distribution South America: Rio Tapajós drainage, Amazon River basin in Brazil.
Amazon, Lower Amazon, Tapajós (click on these areas to find other species found there)

Log in to view data on a map.
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
Furniture In the wild inhabits small forest creeks which are usually shallow (0.3-1.0 m deep, 5-10 m wide), with a sandy bottom, clear or slightly black water, moderate water current and dense aquatic and marginal vegetation.
Breeding Unreported.
Breeding Reports There is no breeding report.
Hop to next section Further Information
Reference Neotropical Ichthyology v. 5 (no. 4), pp 429, Figs. 1, 2A, 3A, 4A.
Registered Keepers There is no registered keeper.
Wishlists Love this species? Click the heart to add it to your wish list.
There is no wish to keep this species.
Spotters Spotted this species somewhere? Click the binoculars!
There is but a single record of this fish being seen, view it.
Forum BBCode
Look up PlanetCatfish.com Look up A. triplax on PlanetCatfish.com
Look up on Fishbase Look up A. triplax on Fishbase
Look up on Encyclopedia of Life Look up A. triplax on Encyclopedia of Life
Look up on Global Biodiversity Information Facility Look up A. triplax on Global Biodiversity Information Facility
Acestridium triplax QR code LFS label creator
Last Update 2023 Aug 10 04:36 (species record created: 2010 Jul 04 04:58)