Journal Article10.1666/0094-8373(2005)031<0098:FIAASO>2.0.CO;2
Faunal invasions as a source of morphological constraints and innovations? The diversification of the early Cardioceratidae (Ammonoidea; Middle Jurassic)
TL;DR: It is demonstrated here that geographical constraints play a significant role in the expression of innovation and may be seen as a major factor in macroevolutionary dynamics.
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Abstract: Multivariate analysis of shell characters and quantification of morphological diversity (morphospace occupation and disparity) are used here to investigate the modes of morphological diversification of ammonites. We define five events in early cardioceratid history that connect geographical changes causing emigration or immigration phases with biodiversity dynamics: (1) the initial colonization of the Arctic Basin by the Cardioceratidae at the end of the Bajocian, Middle Jurassic; (2) the first appearance of the Kosmoceratidae clade in the Boreal Realm during the Bathonian; (3) the ensuing expansion phase of this clade in the Boreal Realm; (4) the first phase of migration of the Cardioceratidae (early Callovian) through Eastern Europe, Western Britain and the Yukon corridor; and (5) the second unrelated migration phase in the Western Interior only. Analysis of spatial occupation shows that acquisition of this field occurs essentially by replacement or subdivision of preexisting peaks of occupatio...
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Citations
The Evolution of Pharyngognathy: A Phylogenetic and Functional Appraisal of the Pharyngeal Jaw Key Innovation in Labroid Fishes and Beyond
Peter C. Wainwright,W. Leo Smith,Samantha A. Price,Kevin L. Tang,John S. Sparks,Lara A. Ferry,Kristen L. Kuhn,Kristen L. Kuhn,Ron I. Eytan,Thomas J. Near +9 more
TL;DR: This study provides a surprising, but well-supported, hypothesis for a convict-blenny sister group to the charismatic cichlids and new insights into the evolution of pharyngognathy.
Functional innovations and morphological diversification in parrotfish.
Samantha A. Price,Peter C. Wainwright,David R. Bellwood,Erem Kazancıoğlu,David C. Collar,Thomas J. Near +5 more
TL;DR: Interestingly, this morphological diversity within six functionally important oral jaw traits may not have led to differential resource uses as available data suggest that members of this clade show remarkable homogeneity of diet.
Allometric Space and Allometric Disparity: A Developmental Perspective in the Macroevolutionary Analysis of Morphological Disparity
TL;DR: Novel uses of allometric spaces are advanced with the goal of investigating the focal role of development in shaping the evolution of morphological disparity, and developmental insights into morphological diversification otherwise intractable from the analysis of adult morphospace alone are allowed.
83
Ammonoid Habitats and Life History
Alexander Lukeneder
- 01 Jan 2015
TL;DR: In this article, the current knowledge about the ammonoid/habitat relation is reviewed and in part newly interpreted, based on morphological and geochemical analyses in association with results from modern relatives, forming the foundation for subsequent interpretations.
72
Combining ontogenetic and evolutionary scales of morphological disparity: a study of early Jurassic ammonites.
TL;DR: In this article, a case study of the Early Jurassic ammonite family Hildoceratidae (Mollusca, Cephalopoda) is presented, where morphometric analyses of the shell shape of 20 species spanning the morphological spectrum of the family are used to quantify and contrast juvenile and adult disparity levels.
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