Serrapinnus sterbai (=7 Rays Mint Tetra)

16. May 2011

We imported this new, very nice and interesting tetra for the first time now from Brazil. Obviously this species originates from the Araguaia/Tocantins basin in Central Brazil. In the most current issue of the German aquarium magazine “Amazonas” (Issue 35, May/June 2011, p. 79) this fish is named “7 Rays Mint Tetra” what is adopted here.

The fish become about 3 cm long and the males can be easily recognized by the very strange looking laterally broadened anterior anal fin rays (seven, thus the popular name) and the saw-like keel structure at the lower end of the caudal peduncle. Structures of that kind can be found in the genera Spintherobolus and Serrapinnus, but in the 7 Rays Mint Tetra the anterior anal fin rays are not connected by membranes which is the case in all known species of Spintherobolus and Serrapinnus. Thus our fish might not belong only to a new species, but also to a new genus.

Regarding keeping the new species proved to be undemanding so far. The fish are typical, very lively schooling fish.

For our customers: the animals have code 293692 on our stocklist. Please note that we exclusively supply the wholesale trade.

Lexicon: Serrapinnus: Latin, means “saw-fin”, referring to “the peculiar shape of the anal-fin rays of mature males.” (Malabarba, 1998). Spintherobolus: from ancient Greek, means about “emitting sparks”, probably referring to the lateral line organ.

Suggestion of a common name: 7 Rays Mint Tetra

Text & photos: Frank Schäfer

Postscriptum: the species has been described in 2012 under the name of Serrapinnus sterbai by Axel Zarske. This is the complete reference: Zarske, A. (2012): Serrapinnus sterbai spec. nov. — Beschreibung eines neuen Salmlers (Teleostei: Characiformes: Characidae: Cheirodontinae) aus Brasilien mit Bemerkungen zu S. gracilis (Géry, 1960) comb. nov. und S. littoris (Géry, 1960) comb. nov. Vertebrate Zoology v. 62 (no. 1): 3-17.

Angaben zum Tier
Herkunft Brasilien / Brazil
Verfügbare Größe in cm 3-4