A complex and confusing taxonomy has concealed the diversity dynamics of Cretaceous ichthyosaurs (Reptilia) for decades. The near totality of Albian-Cenomanian remains from Eurasia has been assigned, by default, to the loosely defined entity Platypterygius campylodon, whose holotype was supposed to be lost. By thoroughly examining the Cenomanian ichthyosaur collections from the UK, I redescribe...

We explore the functional, developmental, and evolutionary processes which are argued to produce tooth reduction in the extinct marine reptile Stenopterygius quadriscissus (Reptilia: Ichthyosauria). We analyze the relationship between mandible growth and tooth size, shape, and count, to establish an ontogenetic trend. The pattern in S. quadriscissus is consistent with hypotheses of tooth size r...

Most mammals and approximately 20% of squamates (lizards and snakes) are viviparous, whereas all crocodilians, birds and turtles are oviparous. Viviparity evolved greater than 100 times in squamates, including multiple times in Mabuyinae (Reptilia: Scincidae), making this group ideal for studying the evolution of nutritional patterns associated with viviparity. Previous studies suggest that ext...

Life at high altitudes is particularly challenging for ectothermic animals like reptiles and involves the evolution of specialised adaptations to deal with low temperatures, hypoxia intense UV radiation. As a result, only very few reptile taxa are able survive above 5,000 m elevation herpetological observations from these exceedingly rare. We report here an exceptional observation lizard popula...

Press, Cambridge, England. MORI, A., AND T. HIKIDA. 1993. Natural history observations on the flying lizards, Draco volans sumatranus (Agamidae, Squamata) from Sarawak, Malaysia. Raffles Bull. Zool. In Press. MUSTERS, C. J. M. 1983. Taxonomy of the genus Draco L. (Agamidae, Lacertilia, Reptilia). Zool. Verhandelingen No. 199:1-120. PFEFFER, P. 1962. Parades et comportement territorial chez troi...

Based on material collected from Pseudemys nelsoni (Reptilia: Chelonia: Emydidae) during a parasite survey of the herpetofauna around Gainesville, Florida, USA, Polystomoides nelsoni sp. n. is described as a new polystome species. This parasite was found in the oral and pharyngeal region of the host. In a sample of nine Pseudemys nelsoni, three specimens were found to release polystome eggs. On...