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The Fossil Record02:56

The Fossil Record

The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
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Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.Phylogenetic trees illustrate the evolutionary relationships among these organisms. Scientists infer organisms’ common ancestry by evaluating shared morphological and genetic characteristics. Together, the fossil...
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Reproductive Techniques for Ovarian Monitoring and Control in Amphibians
04:37

Reproductive Techniques for Ovarian Monitoring and Control in Amphibians

Published on: May 12, 2019

Amphibian development in the fossil record.

Nadia B Fröbisch1, Jennifer C Olori, Rainer R Schoch

  • 1Department of Organismal Biology & Anatomy, University of Chicago, 1027 E 57th Street, Culver 108, Chicago, IL 60637, USA. nfrobisch@uchicago.edu

Seminars in Cell & Developmental Biology
|November 17, 2009
PubMed
Summary
This summary is machine-generated.

Fossil amphibian ontogenetic sequences, though rare, offer crucial insights into extinct species. Studying these developmental series enhances our understanding of ancient amphibian anatomy, life history, and ecology.

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Area of Science:

  • Paleontology
  • Evolutionary Biology
  • Vertebrate Zoology

Background:

  • Ontogenetic series of extinct taxa are rare, often incomplete, and challenging to interpret.
  • The fossil record of amphibians, however, contains well-preserved ontogenetic sequences for temnospondyl and lepospondyl taxa.
  • These sequences provide valuable data on the development of extinct amphibian groups.

Purpose of the Study:

  • To summarize current knowledge on fossil amphibian ontogenies.
  • To assess the potential and limitations of these fossil series for phylogenetic relationship assessments.
  • To discuss the insights gained regarding the anatomy, life history, and ecology of extinct amphibians.

Main Methods:

  • Review and synthesis of existing literature on fossil amphibian ontogenetic sequences.
  • Analysis of the interpretability and completeness of preserved ontogenetic data.
  • Comparative analysis of developmental patterns across different extinct amphibian taxa.

Main Results:

  • Despite rarity, amphibian fossil ontogenies offer significant data on developmental patterns.
  • These sequences provide insights into growth, metamorphosis, and adult morphology of extinct amphibians.
  • Limitations include preservation biases and challenges in accurately reconstructing developmental trajectories.

Conclusions:

  • Fossil amphibian ontogenies are invaluable for reconstructing the biology of extinct groups.
  • Careful interpretation is necessary to overcome limitations and maximize the utility of these fossils.
  • Continued study of ontogenetic sequences will refine our understanding of amphibian evolution.