The limb is a commonly used model system for developmental biology. Given the need for
precise control of complex signalling pathways to achieve proper patterning, the limb is also …

The remarkable radiation of South American (SA) canids produced 10 extant species
distributed across diverse habitats, including disparate forms such as the short-legged …

Heterochrony, or a change in developmental timing, is an important mechanism of
evolutionary change. Historically the concept of heterochrony has focused alternatively on …

Short-tailed opossums (genus Monodelphis) represent one of the most speciose clades of
New World marsupials, with 26 currently recognized species that collectively range from …

Female laboratory opossums of some genetic stocks can reach sexual maturity as early as
five months of age, and males achieve sexual maturity two to three weeks later …

Background: At birth, marsupial neonates have precociously developed forelimbs. The
development of the tammar wallaby (Macropus eugenii) hindlimbs lags significantly behind …

A fundamental question in biology is how embryonic development is timed between different
species. To address this problem, we compared wing development in the quail and the …

The emergence of evo-devo has had profound effects on how we study evolution. However,
evo-devo research has tended to involve two general approaches, one being mechanistic …

Variation among individuals is a prerequisite of evolution by natural selection. As such,
identifying the origins of variation is a fundamental goal of biology. We investigated the link …

The evolution of an exaggerated trait can lead to a novel morphology that allows organisms
to exploit new niches. The molecular bases of such phenotypes can reveal insights into the …