Sex-determining mechanisms in reptiles can be divided into two convenient classifications:
genotypic (GSD) and environmental (ESD). While a number of types of GSD have been …

Among vertebrates there is wide variation in the degree to which sexual differentiation is
developmentally buffered, or canalized. In birds, and particularly in mammals …

The author of this book on the theory and principles of zoological classification and
nomenclature is a Professor of Zoology at Harvard University, a Director of the Museum of …

We present phylogenetic analyses of both molecular and morphological data for the 23
major lineages of living turtles and seven key fossil taxa. Nearly 1 kilobase of cytochrome b …

ABSTRACT Zug, George R., Addison H. Wynn, and Carol Ruckdeschel. Age Determination
of Loggerhead Sea Turtles, Caretta caretta, by Incremental Growth Marks in the Skeleton …

We describe the normal embryonic development of the Chinese soft-shelled turtle,
Pelodiscus sinensis. We identified 23 stages between the late neurula and hatching, based …

Turtles are one of Earth's most instantly recognizable life forms, distinguished for over 200
million years in the fossil record. Even so, key nodes in the phylogeny of turtles remain …

Mesoamerica, the area composed of Mexico and Central America, is the third largest of the
world's biodiversity hotspots. The Central American herpetofauna currently consists of 493 …

The turtle family Kinosternidae comprises 25 living species of mud and musk turtles confined
to the New World. Previous attempts to reconstruct a phylogenetic history of the group have …

A character matrix of 39 characters for 14 supregeneric categories of living and extinct turtles
was examined using PAUP 2.41 and 3.0 L. The Branch and Bound algorithm found a single …