Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Plural form of
elpistostegid .
Etymologies
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Examples
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Their discoveries have suggested that the first tetrapods evolved relatively rapidly from lobe-finned fishes, through a short-lived intermediate stage represented by "elpistostegids" such as Tiktaalik, about 380 million years ago.
Gaea Times (by Simple Thoughts) Breaking News and incisive views 24/7 2010
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The grey bar indicates replacement of elpistostegids by tetrapods in body fossil record. b, Effect of adding the Zachełmie tracks to the phylogeny: the ghost ranges of tetrapods and elpistostegids are greatly extended and the 'changeover' is revealed to be an artefact.
Casey Luskin embarrasses himself again - The Panda's Thumb 2010
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Phylogenetic implications of tracks. a, Phylogeny of selected elpistostegids and stem tetrapods fitted to Devonian stratigraphy.
Casey Luskin embarrasses himself again - The Panda's Thumb 2010
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This means that not only tetrapods but also elpistostegids originated much earlier than we thought, because the position of elpistostegids as evolutionary precursors of tetrapods are not in doubt and so they must have existed at least as long, says Per Ahlberg.
Gaea Times (by Simple Thoughts) Breaking News and incisive views 24/7 2010
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The footprints are also 10 million years earlier than the oldest known elpistostegids -- creatures which displayed some animal characteristics but retained fins.
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