Search: id:"swepub:oai:DiVA.org:uu-407125" >
Follow the footprin...
-
Ahlberg, Per,1963-Uppsala universitet,Evolution och utvecklingsbiologi
(author)
Follow the footprints and mind the gaps : a new look at the origin of tetrapods
- Article/chapterEnglish2019
Publisher, publication year, extent ...
-
CAMBRIDGE UNIV PRESS,2019
-
electronicrdacarrier
Numbers
-
LIBRIS-ID:oai:DiVA.org:uu-407125
-
https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-407125URI
-
https://doi.org/10.1017/S1755691018000695DOI
Supplementary language notes
-
Language:English
-
Summary in:English
Part of subdatabase
Classification
-
Subject category:ref swepub-contenttype
-
Subject category:art swepub-publicationtype
Notes
-
The hypothesis that tetrapods evolved from elpistostegids during the Frasnian, in a predominantly aquatic context, has been challenged by the discovery of Middle Devonian tetrapod trackways predating the earliest body fossils of both elpistostegids and tetrapods. Here I present a new hypothesis based on an overview of the trace fossil and body fossil evidence. The trace fossils demonstrate that tetrapods were capable of performing subaerial lateral sequence walks before the end of the Middle Devonian. The derived morphological characters of elpistostegids and Devonian tetrapods are related to substrate locomotion, weight support and aerial vision, and thus to terrestrial competence, but the retention of lateral-line canals, gills and fin rays shows that they remained closely tied to the water. Elpistostegids and tetrapods both evolved no later than the beginning of the Middle Devonian. The earliest tetrapod records come from inland river basins, sabkha plains and ephemeral coastal lakes that preserve few, if any, body fossils; contemporary elpistostegids occur in deltas and the lower reaches of permanent rivers where body fossils are preserved. During the Frasnian, elpistostegids disappear and these riverine-deltaic environments are colonised by tetrapods. This replacement has, in the past, been misinterpreted as the origin of tetrapods.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
-
Uppsala universitetEvolution och utvecklingsbiologi
(creator_code:org_t)
Related titles
-
In:Earth and environmental science transactions of the Royal Society of Edinburgh: CAMBRIDGE UNIV PRESS109:1-2, s. 115-1371755-69101755-6929
Internet link
Find in a library
To the university's database