Onshore-offshore trend in the evolution of calliotropid gastropods expressed in shell morphology
Autor: | Andrzej Kaim, S. Mariel Ferrari |
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Rok vydání: | 2018 |
Předmět: |
0106 biological sciences
Systematics 010506 paleontology Paleontology Morphology (biology) MIDDLE JURASSIC 010603 evolutionary biology 01 natural sciences EVOLUTION Ciencias de la Tierra y relacionadas con el Medio Ambiente Waves and shallow water Taxon CALLIOTROPIS Genus SYSTEMATIC Mesozoic Subgenus Meteorología y Ciencias Atmosféricas Cenozoic CIENCIAS NATURALES Y EXACTAS Geology 0105 earth and related environmental sciences |
Zdroj: | Journal of Systematic Palaeontology. 17:269-286 |
ISSN: | 1478-0941 1477-2019 |
Popis: | Two new species of calliotropid gastropods, Calliotropis (Riselloidea) faustiankensis sp. nov. and Calliotropis (Riselloidea) lukovensis sp. nov., are described from the Middle Jurassic (Middle Bathonian−Upper Callovian) of Poland. Additionally, new excellently preserved shells of Calliotropis (Riselloidea) biarmata (Münster) allow redefinition of this species. The new morphological information obtained from these three fossil species of Calliotropis in combination with the dataset assembled from 20 extinct and 24 living calliotropids is here summarized in quantitative multivariate and principal component analyses suggesting an onshore-offshore trend in calliotropid gastropod evolution from the Triassic to Recent times. This trend, which is expressed in the morphology of shells, shows that the Mesozoic species are mostly shallow water, while Cenozoic and Recent taxa are mostly deep water. The distinction supports earlier suggestions that the genus Calliotropis can be subdivided into two temporal subgenera belonging to the family Eucyclidae Koken. Fil: Ferrari, Silvia Mariel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico de Geología y Paleontología; Argentina Fil: Kaim, Andrzej. Polish Academy of Sciences; Polonia |
Databáze: | OpenAIRE |
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