Epactionotus
| Epactionotus | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Siluriformes |
| Family: | Loricariidae |
| Tribe: | Otothyrini |
| Genus: |
Epactionotus Reis & Schaefer, 1998 |
| Type species | |
|
Epactionotus bilineatus Reis & Schaefer, 1998 |
|
| Species | |
|
4 species (see text) |
|
4 species (see text)
Epactionotus is a genus of armored catfishes native to South America.
Epactionotus was first described in 1998 by Roberto E. Reis and Scott A. Schaefer, as including three species.Epactionotus is part of the tribe Otothyrini within the subfamily Hypoptopomatini. Epactionotus is sister to a clade including Eurycheilichthys, , Microlepidogaster, Schizolecis, Otothyris, and Pseudotothyris.E. yasi was described in 2004.
There are currently four recognized species in this genus:
The first three described Epactionotus species are each endemic to a very limited geographic area along the Atlantic coast of southern Brazil.E. bilineatus is endemic to the rio Maquiné, the rio Três Forquilhas and its tributaries in Rio Grande do Sul State, southern Brazil.E. itaimbezinho is endemic to two localities in the upper reaches of the rio Mampituba drainage, an isolated coastal stream situated along the border between Rio Grande do Sul and Santa Catarina States, southern Brazil.E. gracilis is endemic to the Araranguá River drainage, an isolated coastal drainage in southern Santa Catarina State.E. yasi is only known from the arroyo Lobo, a tributary of the Iguazu River in Argentina.
These fish are small, none surpassing 4 centimetres (1.6 in) SL. The head have longitudinal light-colored stripe markings which may extend onto the body over a base green color. The body is covered by bony plates except for a few areas.E. yasi is differentiated from the other species by a vent completely covered by platelets. The adipose fin is absent. The lips are small and round and form a suckermouth. Maxillary barbels are short. Odontodes are present on the head and trunk and are generally uniform in size and distribution.
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