Small changes, big results: evolution of morphological discontinuity in mammals

Mammal disparity decreases during the Cretaceous angiosperm radiation.

Fossil discoveries over the past 30 years have radically transformed traditional views of Mesozoic mammal evolution. In addition, recent research provides a more detailed account of the Cretaceous diversification of flowering plants. Here, we examine patterns of morphological disparity and functional morphology associated with diet in early mammals. Two analyses were performed: (i) an examinati...

Leptospirosis in small mammals of Iran: II: Isolation of Leptospira grippotyphosa, from Mus musculus

On the Ecological Separation between Tigers and Leopards

In the Royal Chitawan National Park, Nepal, the tiger (Panthera tigris) and the leopard (Panthera pardm) coexist in the riverine forest/tall grass vegetation types. These two big cats differ in the size of prey killed, use of vegetation types, and in activity periods. Although the tiger's weight is four times that of the leopard, coexistence is reportedly not the general rule. A comparison of t...

Leptospirosis in small mammals of Iran; 1. Serologic tests and isolation of Leptospira hebdomadis from Apodemus sylvaticus

Evolution of ventricular myocyte electrophysiology.

The relative importance of regulatory versus structural evolution for the evolution of different biological systems is a subject of controversy. The primacy of regulatory evolution in the diversification of morphological traits has been promoted by many evolutionary developmental biologists. For physiological traits, however, the role of regulatory evolution has received less attention or has b...