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44742

Some Morphological Studies on the Jaw Joint of the Australian Saltwater Crocodile (Crocodylus porosus)

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Last updated: 04 Jan 2025

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Abstract

The saltwater crocodile is the largest of all living reptiles. It is also known and proved that it has the largest biting forces. The magnitude of the biting force ex- erted by the jaw leads to thoughts about the anatomical structure and construction of the jaw joint in this reptile. Thirteen skulls of the saltwater crocodile (C. porosus) were used for this study. Some skulls were used for X-raying and morphology, and the others for histological slides which were prepared from the articular cartilages, capsule and collateral ligaments. The quadrate/articular joint (jaw joint) was diarthroidal, formed by two articular surfaces, which were fibrocartilage in nature at the periphery of the articular surface, hyaline in the rest of the articular surface, and ossifies on reaching the underlying bone. The thick lateral and thin medial collateral ligaments were formed of collagenous fibers. An articular disc was missing in the crocodile quadrate/articular joint. The joint was surrounded by a complex massive group of muscles responsible for the firm closure and opening of the mouth. The results were supported by 10 images and 4 tables, and were discussed with other amphibians, domestic animals and man when needed.

DOI

10.21608/jva.2014.44742

Keywords

Jaw joint, quadrate-articular joints, Morphology, saltwater crocodile

Authors

First Name

Ashraf

Last Name

Saber

MiddleName

Sobhy Mohamad

Affiliation

Department of Anatomy & Embryology. Fac. Vet. Med., University of Sadat City, EGYPT & Discipline of Veterinary Sciences, College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, Australia

Email

saberashraf_2@yahoo.com

City

Cairo

Orcid

0000-0001-6707-5160

First Name

A.

Last Name

Hassanin

MiddleName

-

Affiliation

Department of Cytology and Histology, Faculty of Veterinary Medicine, Univer- sity of Sadat City, Sadat City, Egypt.

Email

-

City

Sadat City

Orcid

-

Volume

7

Article Issue

2

Related Issue

6940

Issue Date

2014-10-01

Receive Date

2014-05-02

Publish Date

2014-10-01

Page Start

55

Page End

74

Print ISSN

1687-9988

Online ISSN

2357-0504

Article File

JVA_Volume 7_Issue 2_Pages 55-74.pdf

PDF . 1.1MB

Link

https://jva.journals.ekb.eg/article_44742.html

Detail API

https://jva.journals.ekb.eg/service?article_code=44742

Order

4

Type

Original Article

Type Code

782

Publication Type

Journal

Publication Title

Journal of Veterinary Anatomy

Publication Link

https://jva.journals.ekb.eg/

MainTitle

Some Morphological Studies on the Jaw Joint of the Australian Saltwater Crocodile (Crocodylus porosus)

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Article

Created At

22 Jan 2023