Nannoptopoma
| Nannoptopoma | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Siluriformes |
| Family: | Loricariidae |
| Tribe: | Hypoptopomatini
|
| Genus: | Nannoptopoma Schaefer, 1996 |
| Species | |
| |
Nannoptopoma is a small genus of catfishes (order Siluriformes) of the family Loricariidae. This genus includes two species, N. spectabile and N. sternoptychum.[1]
Taxonomy
Nannoptopoma is classified within the tribe
Hypoptopomatini of the subfamily Hypoptopomatinae. It is most closely related to the genus Hypoptopoma with which it has a sister group relationship.[2]
Distribution
N. spectabile is known from the upper
Orinoco basins of Colombia, and N. sternoptychum is known from the lower Amazon River basin and tributaries below 200 metres (660 ft) elevation.[1]
Physical description
Nannoptopoma differs from other members of the subfamily Hypoptopomatinae by
serrae characteristics of Hypoptopoma and have a shorter, stockier body.[2] Both species reach about 3 centimetres (1.2 in) SL.[3][4]
N. sternoptychum differs from N. spectabile in head shape, pectoral fin length, and some meristic features.[2]
Males have an elongate genital papilla and enlarged pelvic fin odontodes. Also, there is a patch of odontodes involving four paired plates on either side of the pre-anal shield between the pelvic fin origin and the anus, possibly involved in increased adhesion in mating encounters.[2]
References
- ^ .
- ^ JSTOR 1447654.
- ^ Froese, Rainer; Pauly, Daniel (eds.) (2007). "Nannoptopoma spectabilis" in FishBase. June 2007 version.
- ^ Froese, Rainer; Pauly, Daniel (eds.) (2007). "Nannoptopoma sternoptychum" in FishBase. June 2007 version.