Project 845: C. D. Shelton, P. M. Sander, K. Stein, H. Winkelhorst. 2013. Long bone histology indicates sympatric species of Dimetrodon (Lower Permian, Sphenacodontidae). Earth and Environmental Science Transactions of the Royal Society of Edinburgh. 103 (3-4):217-236.
Abstract
The Briar Creek Bonebed (Artinskian, Nocona Formation) in Archer County is one of the richest sources of Dimetrodon bones in the Lower Permian of Texas, USA. Based on size, a small (D. natalis), an intermediate (D. booneorum), and a large species (D. limbatus) have been described from this locality. It has been proposed that these traditionally recognised species represent an ontogenetic series of only one species. However, the ontogenetic series hypothesis is inconsistent with the late ontogenetic state of the small bones, as suggested by their osteology and degree of ossification. Histological analysis of newly excavated material from the Briar Creek Bonebed has resolved some of the discretion between these two competing hypothesis, confirming the coexistence of a small (D. natalis) with at least one larger Dimetrodon species. An external fundamental system is present in the largest sampled long bones identified as D. natalis. The histology of D. natalis postcrania is described as incipient fibro lamellar bone. This tissue is a combination of parallel-fibred and woven-fibred bone that is highly vascularised by incipient primary osteons. The species status of D. booneorum and D. limbatus remain unresolved.Read the article »
Project DOI: 10.7934/P845, http://dx.doi.org/10.7934/P845
This project contains |
---|
Download Project SDD File ![]() |
Currently Viewing:
MorphoBank Project 845
MorphoBank Project 845
- Creation Date:
17 December 2012 - Publication Date:
29 August 2013 - Project views: 26785
- Media downloads: 6
Authors' Institutions
- Rheinische Friedrich-Wilhelms-Universität Bonn (University of Bonn)
Members
member name | taxa ![]() |
specimens ![]() |
media ![]() |
Christen Shelton Project Administrator Last logged in 10/08/13 | 3 | 13 | 13 |
Maureen Admin Full membership ![]() Last logged in 10/11/13 | 0 | 0 | 0 |
MorphoBank Curator Full membership ![]() Last logged in 10/14/13 | 0 | 0 | 0 |
Project has no matrices defined.
Project views 
type | number of views | Individual items viewed (where applicable) |
Total project views | 26785 | |
Project overview | 3529 | |
Media views | 12947 | Media search (4544 views); M306393 (626 views); M306387 (749 views); M306388 (634 views); M306396 (594 views); M306391 (673 views); M306395 (615 views); M306399 (616 views); M306398 (681 views); M306389 (646 views); M306397 (660 views); M306394 (666 views); M306390 (580 views); M306392 (663 views); |
Specimen list | 7038 | |
Taxon list | 2018 | |
Bibliography | 878 | |
Documents list | 375 |
Project downloads 
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 242 | |
Media downloads | 6 | M306391 (1 download); M306387 (2 downloads); M306393 (1 download); M306395 (2 downloads); |
Project downloads | 236 |