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Recent And Rapid Radiation Of The Highly Endangered Harlequin Frogs (Atelopus) Into Central America Inferred From Mitochondrial Dna Sequences, Juan P. Ramirez, Cesar A. Jaramillo, Erik D. Lindquist, Andrew J. Crawford, Roberto Ibanez
Recent And Rapid Radiation Of The Highly Endangered Harlequin Frogs (Atelopus) Into Central America Inferred From Mitochondrial Dna Sequences, Juan P. Ramirez, Cesar A. Jaramillo, Erik D. Lindquist, Andrew J. Crawford, Roberto Ibanez
Biology Educator Scholarship
Populations of amphibians are experiencing severe declines worldwide. One group with the most catastrophic declines is the Neotropical genus Atelopus (Anura: Bufonidae). Many species of Atelopus have not been seen for decades and all eight Central American species are considered “Critically Endangered”, three of them very likely extinct. Nonetheless, the taxonomy, phylogeny, and biogeographic history of Central American Atelopus are still poorly known. In this study, the phylogenetic relationships among seven of the eight described species in Central America were inferred based on mitochondrial DNA sequences from 103 individuals, including decades-old museum samples and two likely extinct species, plus ten …
External Morphology Of The Chorion Of The Annual Fishes Cynolebias (Cyprinodontiformes: Rivulidae), Marcelo Loureiro, Rafael O. De Sá
External Morphology Of The Chorion Of The Annual Fishes Cynolebias (Cyprinodontiformes: Rivulidae), Marcelo Loureiro, Rafael O. De Sá
Biology Faculty Publications
Members of the family Rivulidae (killifishes) inhabit temporary bodies of freshwater in South and Central America (one species is also found in North America). The most remarkable characteristic of the family Rivulidae is that species have an annual life cycle with a drought-resistant egg during the dry season. Parenti's (1981) analysis of the order Cyprinodontiformes considered a single genus, Cynolebias, whereas Cos- ta's (1990) phylogenetic analysis of the family Rivulidae separates Cynolebias from Cynopoecilus. One of Costa's synapomorphies to separate Cynopoecilus is the unique structure of their egg's chorion, which is shared with Leptolebias and Campellolebias.