title: Cryptomyrus: a new genus of Mormyridae (Teleostei, Osteoglossomorpha) with two new species from Gabon, West-Central Africa.
abstract: We use mitochondrial and nuclear sequence data to show that three weakly electric mormyrid fish specimens collected at three widely separated localities in Gabon, Africa over a 13-year period represent an unrecognized lineage within the subfamily Mormyrinae and determine its phylogenetic position with respect to other taxa. We describe these three specimens as a new genus containing two new species. Cryptomyrus, new genus, is readily distinguished from all other mormyrid genera by a combination of features of squamation, morphometrics, and dental attributes. Cryptomyrus ogoouensis, new species, is differentiated from its single congener, Cryptomyrus ona, new species, by the possession of an anal-fin origin located well in advance of the dorsal fin, a narrow caudal peduncle and caudal-fin lobes nearly as long as the peduncle. In Cryptomyrus ona, the anal-fin origin is located only slightly in advance of the dorsal fin, the caudal peduncle is deep and the caudal-fin lobes considerably shorter than the peduncle. Continued discovery of new taxa within the "Lower Guinea Clade" of Mormyridae highlights the incompleteness of our knowledge of fish diversity in West-Central Africa. We present a revised key to the mormyrid genera of Lower Guinea.
authors.affiliation: Cornell University Museum of Vertebrates, 159 Sapsucker Woods Road, Ithaca, New York 14850 USA.
authors.forename: John P
authors.initials: JP
authors.lastname: Sullivan
authors.affiliation: Institute of Oceanography, National Taiwan University, Roosevelt Road, Taipei 10617, Taiwan.
authors.forename: Sébastien
authors.initials: S
authors.lastname: Lavoué
authors.affiliation: Cornell University Museum of Vertebrates, 159 Sapsucker Woods Road, Ithaca, New York 14850 USA; Department of Neurobiology and Behavior, Cornell University, Ithaca, New York 14853 USA.
authors.forename: Carl D
authors.initials: CD
authors.lastname: Hopkins
keywords: African freshwater fishes; DNA; EOD; Mormyrinae; Weakly electric fish; electric organ discharge; integrative taxonomy; phylogeny; rarity