Amphibians and reptiles as a group are often secretive, reach their greatest diversity often in
remote tropical regions, and contain some of the most endangered groups of organisms on …

Among the principal causes producing detrimental effects on global biodiversity are
introductions of alien species. Very few attempts to control introduced amphibians and …

Accurate species delimitation is a central assumption of biology that, in groups such as the
Crocodylia, is often hindered by highly conserved morphology and frequent introgression. In …

Inter-specific hybridization may be especially detrimental when one species is extremely
rare and the other is abundant owing to the potential for genetic swamping. The Cuban …

Abstract The American crocodile (Crocodylus acutus) and the Morelet's crocodile (C.
moreletii) are broadly sympatric in Belize and Mexico. The presence of morphologically …

The American crocodile is the most widely distributed of the New World crocodiles, ranging
from the southern tip of Florida, along both the Atlantic and Pacific coasts of southern …

Hybrid zones represent natural laboratories to study gene flow, divergence and the nature of
species boundaries between closely related taxa. We evaluated the level and extent of …

There is a surprising lack of genetic data for the Cuban crocodile (Crocodylus rhombifer),
especially given its status as a critically endangered species. Samples from captive …

The Siamese crocodile (Crocodylus siamensis) and Saltwater crocodile (C. porosus) are two
of the most endangered animals in Thailand. Their numbers have been reduced severely by …

Advances in molecular biology and genetics are revealing that many recognized
crocodylian species are complexes of two or more cryptic species. These discoveries will …