PHYLOGENETIC EVIDENCE FOR A MAJOR REVERSAL OF LIFE-HISTORY EVOLUTION IN PLETHODONTID SALAMANDERS
Open Access
- 1 December 2004
- Vol. 58 (12), 2809-2822
- https://doi.org/10.1111/j.0014-3820.2004.tb01632.x
Abstract
The transition from aquatic to terrestrial eggs is a key evolutionary change that has allowed vertebrates to successfully colonize and exploit the land. Although most amphibians retain the primitive biphasic life cycle (eggs deposited in water that hatch into free-living aquatic larvae), direct development of terrestrial eggs has evolved repeatedly and may have been critical to the evolutionary success of several amphibian groups. We provide the first conclusive evidence for evolutionary reversal of direct development in vertebrates. The family Plethodontidae (lungless salamanders) contains the majority of salamander species, including major radiations of direct developers. We reconstruct the higher level phylogenetic relationships of plethodontid salamanders using molecular and morphological data and use this phylogeny to examine the evolution of direct development. We show that the predominantly biphasic desmognathines, previously considered the sister group of other plethodontids, are nested inside a group of direct-developing species (Plethodontini) and have re-evolved the aquatic larval stage. Rather than being an evolutionary dead end, the reversal from direct developing to biphasic life history may have helped communities in eastern North America to achieve the highest local diversity of salamander species in the world.Keywords
This publication has 62 references indexed in Scilit:
- Speciation, phylogeography and evolution of life history and morphology in plethodontid salamanders of the Eurycea multiplicata complexMolecular Ecology, 2004
- Loss and recovery of wings in stick insectsNature, 2003
- A Fossil Snake with LimbsScience, 2000
- Phylogenetic Relationships and Systematic Revision of Central Texas Hemidactyliine Plethodontid SalamandersHerpetological Monographs, 2000
- Multiple Comparisons of Log-Likelihoods with Applications to Phylogenetic InferenceMolecular Biology and Evolution, 1999
- Combining Data Sets with Different Phylogenetic HistoriesSystematic Biology, 1998
- An evolutionary correlate of genome size change in plethodontid salamandersProceedings Of The Royal Society B-Biological Sciences, 1997
- Adaptive Radiation of Salamanders in Middle American Cloud ForestsAnnals of the Missouri Botanical Garden, 1987
- Tongue Evolution in the Lungless Salamanders, Family Plethodontidae IV. Phylogeny of Plethodontid Salamanders and the Evolution of Feeding DynamicsSystematic Zoology, 1986
- Oral structures and their development in egg‐brooding hylid frog embryos and larvae: Evolutionary and ecological implicationsJournal of Morphology, 1984