Coelacanth

Coelacanth (Wiki) 
    The coelacanths which are related to lungfishes and tetrapods, were believed to have been extinct since the end of the Cretaceous period. More closely related to tetrapods than even the ray-finned fish, coelacanths were considered the "missing link" between the fish and the tetrapods until the first Latimeria specimen was found off the east coast of South Africa, off the Chalumna River (now Tyalomnqa) in 1938.[1] This discovery 65 million years after they were believed to have gone extinct makes them arguably the most well-known example of a Lazarus taxon, a species that seems to have disappeared from the fossil record only to reappear much later. 


Corticosteroids of the coelacanth Latimeria chalumnae (Goog) 
Only abstract available online.  I got the PDF through the library. 


NOTE:  For a brief discussion of the newly reformatted
Australian Research Online data base, please see:  Lungfish  

Australian Research Online (Goog) 
Australian Research Online 
Major index.  Come back to this. 

From the above Australian Research Online


Oldest coelacanth, from the Early Devonian of Australia

Author/Creator: Johanson, Zerina, Long, John A, Talent, John A, Janvier, Philippe, Warren, John A
Resource type: journal article
Date: 2006
Subject: actinistia, sarcopterygii, Early Devonian, ghost range
Record contributed by: Macquarie University

Full Record and related resources:
http://hdl.handle.net/1959.14/25978
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http://hdl.handle.net/1959.14/25978

Description
Coelacanths are well-known sarcopterygian (lobe-finned) fishes, which together with lungfishes are the closest extant relatives of land vertebrates (tetrapods). Coelacanths have both living representatives and a rich fossil record, but lack fossils older than the late Middle Devonian (385–390Myr ago), conflicting with current phylogenies implying coelacanths diverged from other sarcopterygians in the earliest Devonian (410–415Myr ago). Here, we report the discovery of a new coelacanth from the Early Devonian of Australia (407–409Myr ago), which fills in the approximately 20Myr ‘ghost range’ between previous coelacanth records and the predicted origin of the group. This taxon is based on a single lower jaw bone, the dentary, which is deep and short in form and possesses a dentary sensory pore, otherwise seen in Carboniferous and younger taxa.

4 page(s)

Publisher: The Royal Society
Contributor: Macquarie University. Dept. of Earth and Planetary Sciences; Macquarie University. Dept. of Biological Sciences
Relation: Biology letters, Vol. 2, Issue 3, p.443-446; 10.1098/rsbl.2006.0470

Other identifier: ISSN:1744-957X; mq-rm-2006005100
Language: eng
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Coelacanths are well-known sarcopterygian (lobe-finned) fishes, which together with lungfishes are the closest extant relatives of land vertebrates (tetrapods). Coelacanths have both living representatives and a rich fossil record, but lack fossils older than ...
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