Salamander-like development in a seymouriamorph revealed by palaeohistology
| Autor: | Jozef Klembara, Sophie Sanchez, J. Sébastien Steyer, Jacques Castanet |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
biology
Fossils Reptiles Urodela Zoology Extremities Biological evolution biology.organism_classification Biological Evolution Agricultural and Biological Sciences (miscellaneous) Discosauriscus stomatognathic system Extant taxon biology.animal Animals Salamander Sexual maturity Skeletochronology General Agricultural and Biological Sciences Phylogeny Research Article |
| Zdroj: | Biology Letters. 4:411-414 |
| ISSN: | 1744-957X 1744-9561 |
| DOI: | 10.1098/rsbl.2008.0159 |
| Popis: | The amniotes generally lay eggs on land and are thereby differentiated from lissamphibians (salamanders, frogs and caecilians) by their developmental pattern. Although a number of 330–300-Myr old fossils are regarded as early tetrapods placed close to amniotes on the basis of anatomical data, we still do not know whether their developmental pattern was more similar to those of lissamphibians or amniotes. Here we report palaeohistological and skeletochronological evidence supporting a salamander-like development in the seymouriamorph Discosauriscus . Its long-bone growth pattern, slow diaphyseal growth rate and delayed sexual maturity (at more than 10 years old) are more comparable with growth features of extant salamanders rather than extant amniotes, even though they are mostly hypothesized to be phylogenetically closer to living amniotes than salamanders. |
| Databáze: | OpenAIRE |
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