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44740

Some Morphological Studies on the Wing and foot of the Southern Cassowary (Casuarius casuarius)

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Last updated: 04 Jan 2025

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Abstract

The cassowaries are ratites (flightless birds without a keel on their sternum). The wings and feet of a doubled-wattled or Southern cassowary used in this study were radiographed. Pieces of the quills and claws were processed for histological examination, and the wings and feet were cleaned to study the bones. The wings are small with only four long, slightly curved quills or remeges. Quills occurred in follicles, similar to the hair follicles of mammals. The shaft of a quill was for med by a central medulla consisting of a solid polygonal, non-nucleated cell mass surrounded by dense compact keratinized cells compressed to form a cortex. The wing skeleton was formed by the humerus, a thick radius paired with a thinner curved ulna, ulnar and radial carpals, carpometacapal, and three digits. The second digit bore a long curved claw. The skeleton of the foot was formed by the distal extremity of the tarsometatarsal, which had three articular surfaces (trochlea) representing the three digits (II, III, IV). The first digit was missing. The second digit consisted of 3 phalanges, the distal phalanx of which was a long tapering cone sheathed completely by a keratinous long straight claw (dagger-shaped). The third digit was the largest, and consisted of 4 phalanges. The fourth digit was longer than the second one and shorter than the third one, and had five phalanges. The gross anatomy described was supported by 8 images (x-rays, histology, and skeleton of the wings and feet) and discussed in comparison with other bird species.

DOI

10.21608/jva.2014.44740

Keywords

Cassowary, quills, claws, digits, histology, Radiology

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 Anatomy and Pathology, School of Veterinary and Biomedical 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, University of Sadat City, Sadat City, Egypt.

Email

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City

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Orcid

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Volume

7

Article Issue

2

Related Issue

6940

Issue Date

2014-10-01

Receive Date

2014-05-05

Publish Date

2014-10-01

Page Start

17

Page End

32

Print ISSN

1687-9988

Online ISSN

2357-0504

Article File

JVA_Volume 7_Issue 2_Pages 17-32.pdf

PDF . 1.3MB

Link

https://jva.journals.ekb.eg/article_44740.html

Detail API

https://jva.journals.ekb.eg/service?article_code=44740

Order

2

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 Wing and foot of the Southern Cassowary (Casuarius casuarius)

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Type

Article

Created At

22 Jan 2023