Akawaio penak, a new genus and species of Neotropical electric fish (Gymnotiformes, Hypopomidae) endemic to the upper Mazaruni River in the Guiana Shield

被引：20

作者：

Maldonado-Ocampo, Javier A. ^{[1
]}

Lopez-Fernandez, Hernan ^{[2
,3
]}

Taphorn, Donald C.

Bernard, Calvin R. ^{[4
]}

Crampton, William G. R. ^{[5
]}

Lovejoy, Nathan R. ^{[3
,6
]}

机构：

[1] Pontificia Univ Javeriana, Dept Biol, Fac Ciencias, Unidad Ecol & Sistemat UNESIS, Bogota, DC, Colombia

[2] Royal Ontario Museum, Dept Nat Hist, Toronto, ON M5S 2C6, Canada

[3] Univ Toronto, Dept Ecol & Evolutionary Biol, Toronto, ON M5S 3B2, Canada

[4] Univ Guyana, Ctr Study Biodivers, Georgetown, Guyana

[5] Univ Cent Florida, Dept Biol, Orlando, FL 32816 USA

[6] Univ Toronto Scarborough, Dept Biol Sci, Toronto, ON M1C 1A4, Canada

来源：

ZOOLOGICA SCRIPTA | 2014年 / 43卷 / 01期

基金：

加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

GUAYANA HIGHLANDS; DIVERSIFICATION; TELEOSTEI; SYSTEM;

D O I：

10.1111/zsc.12035

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Akawaio penak, a new genus and species, is described from the upper Mazaruni River, Guyana. The new species is diagnosed from all other species of Hypopomidae by several anatomical traits. The phylogenetic affinities of the new genus were inferred using data from one nuclear (rag2) and two mitochondrial (COI and cyt b) genes. The phylogenetic analyses indicate that Akawaio is the sister taxon of a clade that includes Brachyhypopomus, Hypopomus, Microsternarchus and Racenisia. These results provide evidence for the phylogenetic composition of Hypopomidae supported by previous molecular studies and support the position of the Steatogenini (Hypopygus+Steatogenys) as the sister group of Rhamphichthys+Gymnorhamphichthys. The description of this new electric knifefish increases the total number of endemic genera and species in the upper Mazaruni, a region that is suffering freshwater habitat degradation as consequence of gold-mining activities.

引用

页码：24 / 33

页数：10