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Mature Modifications and Sexual Dimorphism


Klug, Christian; Zatoń, Michał; Parent, Horacio; Hostettler, Bernhard; Tajika, Amane (2015). Mature Modifications and Sexual Dimorphism. In: Klug, Christian. Topics in Geobiology. Heidelberg New York London: Springer, 253-320.

Abstract

Allometric growth between different parts of the shell often hampers the identification of mollusk shells, particularly in such cases where preadult shell growth varies strongly. Especially in gastropods, the terminal aperture is often less variable and yields morphological information essential for species determination (e.g. Vermeij 1993; Urdy et al. 2010a, b). In fossil mollusk shells, the adult aperture (peristome)is often missing, partially due to an early death, and partially due to destructive processes, which occurred post mortem (taphonomy). Therefore, the entire shell
ontogeny is known only from a small fraction of all ammonoid taxa (e.g., Landman et al. 2012). Nevertheless, knowledge of the adult shell of ammonoids is very
important since it can yield morphological information essential for systematics and for the reconstruction of various aspects of their paleobiology.

Abstract

Allometric growth between different parts of the shell often hampers the identification of mollusk shells, particularly in such cases where preadult shell growth varies strongly. Especially in gastropods, the terminal aperture is often less variable and yields morphological information essential for species determination (e.g. Vermeij 1993; Urdy et al. 2010a, b). In fossil mollusk shells, the adult aperture (peristome)is often missing, partially due to an early death, and partially due to destructive processes, which occurred post mortem (taphonomy). Therefore, the entire shell
ontogeny is known only from a small fraction of all ammonoid taxa (e.g., Landman et al. 2012). Nevertheless, knowledge of the adult shell of ammonoids is very
important since it can yield morphological information essential for systematics and for the reconstruction of various aspects of their paleobiology.

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Additional indexing

Item Type:Book Section, not refereed, original work
Communities & Collections:07 Faculty of Science > Paleontological Institute and Museum
Dewey Decimal Classification:560 Fossils & prehistoric life
Language:English
Date:2015
Deposited On:09 Feb 2016 16:16
Last Modified:01 Nov 2016 01:01
Publisher:Springer
ISBN:978-94-017-9630-9
Additional Information:Chapter Ammonoid Paleobiology: From anatomy to ecology
Publisher DOI:https://doi.org/10.1007/978-94-017-9630-9_7

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