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Development of the Cetacean Nasal Skull : Advances in Anatomy, Embryology and Cell Biology - Milan Klima

Development of the Cetacean Nasal Skull

Advances in Anatomy, Embryology and Cell Biology

Paperback Published: 29th January 1999
ISBN: 9783540649960
Number Of Pages: 144

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Morphogeny of the nasal skull was investigated in 29 embryos of 13 species of Cetacea. Compared to the original nasal capsule of land mammals, the nasal structures of Cetacea show many weighty transformations. As a result, the nostrils are translocated from the tip of the snout to the vertex of the head. Several structures of the embryonic nasal skull remain preserved even in adult cetaceans. The translocation of the nostrils to the highest point of the surfacing body is among the most perfect adaptions of cetaceans to the aquatic life habits. The morphogeny of the nasal skull suggests that all cetaceans are of common origin and form a single monophyletic order. The hitherto usual division of this order into two suborders, Mysticeti and Odontoceti, appears to be unsubstantiated. Rather, at least three closely related superfamilies should be distinguished within the order Cetacea, viz., Balaenopteroidea, Physeteroidea, and Delphinoidea. The results are in a conspicuous accordance with the most recent molecular biological investigations on this topic.

Introductionp. 1
Materials and Methodsp. 5
Synopsis of Structures of the Embryonic Nasal Skullp. 9
Morphogeny of the Nasal Skullp. 13
Metamorphosis and Translocation of the Nasal Structuresp. 45
Comparison of the Embryonic Nasal Structuresp. 59
The Nasal Structures of Adult Cetaceap. 99
Evolutional and Functional Relationshipsp. 115
The Systematics of Cetacea According to the Morphogeny of Their Nasal Skullp. 125
Summaryp. 131
Referencesp. 133
Table of Contents provided by Blackwell. All Rights Reserved.

ISBN: 9783540649960
ISBN-10: 3540649964
Series: Advances in Anatomy, Embryology and Cell Biology
Audience: General
Format: Paperback
Language: English
Number Of Pages: 144
Published: 29th January 1999
Publisher: Springer-Verlag Berlin and Heidelberg Gmbh & Co. Kg
Country of Publication: DE
Dimensions (cm): 23.39 x 15.6  x 0.84
Weight (kg): 0.23