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A clade of non-sexually dimorphic ponyfishes (Teleostei, Perciformes, Leiognathidae) : phylogeny, taxonomy, and description of a new species. American Museum novitates ; no. 3459

Show simple item record Sparks, John S. en_US Dunlap, Paul Vernon. en_US 2005-10-06T16:37:48Z 2005-10-06T16:37:48Z 2004 en_US
dc.description 21 p. : ill. (some col.) ; 26 cm. en_US
dc.description Electronic version available in portable document format (PDF). en_US
dc.description Includes bibliographical references (p. 18-20). en_US
dc.description.abstract "A phylogeny was generated for Leiognathidae, commonly known as ponyfishes, using nucleotide characters from two mitochondrial genes. Results indicate that Leiognathidae comprises two major clades, one consisting of species that exhibit internally sexually dimorphic light-organ systems (LOS), and the Leiognathus equulus species complex, whose members exhibit neither internal nor external sexual dimorphism of the LOS. Species with internally sexually dimorphic LOS generally also exhibit associated male-specific external modifications in the form of transparent patches on the margin of the opercle, the midlateral flank, or behindthe pectoral fin axil. The L. equulus species complex is the sister group to all other leiognathids, and a new species, L. robustus, recovered within this clade is described herein. Results demonstrate that Leiognathus is paraphyletic, whereas Gazza and Secutor are each monophyletic and are nested within the sexually dimorphic clade. The morphology of the LOS of nonsexually dimorphic leiognathids is compared to the more common sexually dimorphic state, and differences in these systems are discussed and illustrated. In the context of a family-level phylogeny, we can trace the evolution of the leiognathid LOS from a 'simple' non-sexually dimorphic circumesophageal light organ to a complex and species-specific luminescence system involving not only major structural modifications of the light organ itself but also numerous associated tissues"--P. [1]. en_US
dc.format.extent 1177782 bytes
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York, NY : American Museum of Natural History en_US
dc.relation.ispartofseries American Museum novitates ; no. 3459 en_US
dc.subject.lcc QL1 .A436 no.3459, 2004 en_US
dc.subject.lcsh Leiognathidae -- Phylogeny. en_US
dc.subject.lcsh Leiognathus robustus en_US
dc.subject.lcsh Leiognathus equulus -- Morphology. en_US
dc.subject.lcsh Leiognathidae -- Morphology. en_US
dc.subject.lcsh Sexual dimorphism (Animals) en_US
dc.subject.lcsh Bioluminescence. en_US
dc.title A clade of non-sexually dimorphic ponyfishes (Teleostei, Perciformes, Leiognathidae) : phylogeny, taxonomy, and description of a new species. American Museum novitates ; no. 3459 en_US
dc.title.alternative Non-sexually dimorphic ponyfishes en_US
dc.type text en_US

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  • American Museum Novitates
    Novitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology. New numbers are published at irregular intervals.

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