A new annual killifish species of the Hypsolebias flavicaudatus complex from the sao Francisco River basin, Brazilian Caatinga (Cyprinodontiformes: Rivulidae)

作者：Costa Wilson J E M^*; Amorim Pedro F

来源：Vertebrate Zoology, 2011, 61(1): 99-104.

• Caatinga
• Killifishes
• Neotropica
• Species delimitation
• Sao Francisco River
• Systematics
• Taxonomy

The Hypsolebias flavicaudatus species complex is a clade of annual killifishes inhabiting seasonal pools associated to Sao Francisco River basin, in the semi-arid Caatinga region of northeastern Brazil. The analysis of both morphological and molecular data supports recognition of a new species of that complex, herein named as Hypsolebias guanambi. It was collected in the upper section of the Carnaiba de Dentro River drainage and is distinguished from all other species of the complex by having the dorsal fin more posteriorly placed in females, presence of short filamentous rays on the dorsal and anal fins in males, and fewer teeth on the second pharyngobranchial bone. The recognition of a species of the H.flavicaudatus complex endemic to the upper Carnaiba de Dentro River drainage corroborates this region as an important area of endemism for annual killifishes.

• 出版日期2011