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  E-mail Message: I thought you might be interested in this item at http://www.worldcat.org/oclc/112317760 Title: Osteology and skeletal development of Apalone spinifera (Reptilia: Testudines: Trionychidae). Publisher: ISBN/ISSN: 0362-2525 OCLC:112317760

  
  

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Osteology and skeletal development of Apalone spinifera (Reptilia: Testudines: Trionychidae).

Author:	CA Sheil
Edition/Format:	Article : English
Publication:	Journal of morphology, 2003 Apr; 256(1): 42-78
Database:	From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
Other Databases:	British Library Serials; ArticleFirst
Summary:	Despite considerable attention that other groups of reptiles have received, few descriptions of the development and sequences of chondrification and ossification of the entire skeleton of turtles exist. Herein, the adult skeleton of the spiny softshell turtle, Apalone spinifera (Testudines: Trionychidae), is described; this description forms a basis of comparison for the embryonic skeleton and its ontogenesis. Descriptions are made on the basis of cleared and double-stained embryos and dry skeletal postembryonic specimens. The embryonic chondrocranium of A. spinifera is described and compared to those of Emys orbicularis and Caretta caretta, the sequence of chondrification of fore- and hindlimbs are compared with published descriptions of Chelydra serpentina and Chrysemys picta, and the sequence of ossification of elements is compared with those of C. serpentina, Lacerta vivipara, and Alligator mississippiensis. In A. spinifera, the first elements that ossify (Stage 17) are associated with the dermatocranium and mandible, followed by elements of the dermal skull table, lower jaw, and dermal elements of the plastron. In A. spinifera, the sequence of chondrification of limb elements is similar to that of C. serpentina; however, the sequence of ossification varies greatly among Apalone, Chelydra, Lacerta, and Alligator.  Read more...
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