Acnodon oligacanthus
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| Acnodon oligacanthus | |
|---|---|
 | |
| A. oligacanthus | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Characiformes |
| Family: | Serrasalmidae |
| Genus: | Acnodon |
| Species: | A. oligacanthus |
| Binomial name | |
| Acnodon oligacanthus (J. P. Müller & Troschel, 1844) | |
| Synonyms[2] | |
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Acnodon oligacanthus, the slender pacu, is a species of freshwater ray-finned fish belonging to the family Serrasalmidae, which includes the pacus and piranhas. This fish is found in South America.
Acnodon oligacanthus was first formally described as Myleus oligacanthus in 1844 by the German zoologists Johannes Peter Müller and Franz Hermann Troschel with its type loacliaty given as Suriname.[2] In 1903 Carl H. Eigenmann proposed the new monospecific genus Acnodon with M. oligacanthus designated as its type species. Acnodon belongs to the subfamily Myleinae in the family Serrasalmidae[3] which is classified in the suborder Characoidei of the order Characiformes.[4]
Etymology
Acnodon oligacanthus is the type species of the genus Acnodon, a name which prefixies a-, meaning without, onto knodon, which means "the projecting teeth on a hunting spear", an allusion to the mistaken perception that this species does not have a spine in front of its dorsal fin, it actually does, but it is very small. The Specific name oligacanthus, combines the Greek lígos, meaning "little", "small" or "few", with ákantha, maning "thorn", alluding to the small and difficult to discern spine to the front of the origin of the dorsal fin.[5]
Description
Acnodon oligacanthus has a maximum published total length of 20 cm (7.9 in).[6]
Distribution
Acnodon oligacanthus has been confirned to occur in the Maroni and Mana rivers in French Guiana and in the Maronwijne and Suriname rivers. Its presence in Amapá, Brazil and Guyana have still to be confirmed.[1]
