A new early Cambrian lobopod-bearing animal (Murero, Spain) and the problem of the ecdysozoan early diversification

Gámez Vintaned, J.A.; Liñán, E.; Zhuravlev, A.Y.

Авторы: Gámez Vintaned J.A., Liñán E., Zhuravlev A.Yu
Сборник: Evolutionary Biology – Concepts, Biodiversity, Macroevolution and Genome Evolution
Год издания: 2011
Место издания: Springer-Verlag Berlin; Heidelberg
Первая страница: 193
Последняя страница: 219
DOI: 10.1007/978-3-642-20763-1_12
Аннотация: A new xenusian, Mureropodia apae gen. and sp. nov., is found in the lower Cambrian of the Murero Lagerst€atte in the Cadenas Ibe ́ricas, NE Spain. In Mureropodia, the lobopod length/body width ratio reveals that this animal hardly was able to walk on the bottom surface. Possibly, it could use the limbs for anchoring the body to the substrate. A well-developed dermomuscular sac of cir- cular and longitudinal muscular systems as well as probably retractile proboscis fit such an interpretation. The ground plan of the Xenusia includes a vermiform body; a proboscis or mouth cone; paired lobopods with claws; a cuticle displaying a repeated anatomical patterning; a straight digestive tract with terminal mouth and anus. Morphologically heterogeneous xenusians, which crawled with their lobopods along the bottom, might give rise to four morphofunctional lineages – to cephalorhynch worms by adaptation for burrowing with retractable proboscis; to tardigrades by adaptation for interstitial habitat; to euarthropods by adaptation to walking on joint appendages; and to anomalocaridids by adaptation to swimming with lateral flaps.
Добавил в систему: Журавлев Андрей Юрьевич

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A new early Cambrian lobopod-bearing animal (Murero, Spain) and the problem of the ecdysozoan early diversificationстатья

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