منابع مشابه
Coordinated shifts to non-planktotrophic development in spatangoid echinoids during the Late Cretaceous.
Despite widespread interest in the interplay between evolutionary and developmental processes, we still know relatively little about the evolutionary history of larval development. Many clades exhibit multiple shifts from planktotrophic (feeding) to non-planktotrophic (non-feeding) larval development. An important question is whether these switches are scattered randomly through geological hist...
متن کاملAssessing the robustness of disparity estimates: the impact of morphometric scheme, temporal scale, and taxonomic level in spatangoid echinoids
– The joint quantification of disparity and diversity is an important aspect of recent macroevolutionary studies, and is usually motivated by theoretical considerations on the pace of innovation and the filling of morphospace. In practice, varying protocols of data collection and analysis have rendered comparisons among studies difficult. The basic question remains, how sensitive is any given d...
متن کاملDescription of two new fossil echinoids (Echinodermata: Echinoidea) from the Early Hauterivian (Early Cretaceous) of the Paris Basin (France)
Two new echinoid genera and species, Salvaster roberti gen. et sp. nov. and Pygolampas edita gen. et sp. nov. are described. They were collected in the Calcaires à Spatangues Formation (CSF) that consists of limestone and clay sediments deposited in the southeast of the Paris Basin (France) during the Early Hauterivian (Early Cretaceous). The CSF is dated from the Acanthodiscus radiatus chronoz...
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—The enigmatic fossil snipe Capella sp., previously known in the Greater Antilles by specimens recovered from the Bahamas and Cayman Islands, is recorded from three Quaternary cave deposits in western and central Cuba. This new material provides information about the paleoecology and ancient distribution of this taxon in the West
متن کاملConcurrent Cuba
The parallel version of the multidimensional numerical integration package Cuba is presented and achievable speed-ups discussed.
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ژورنال
عنوان ژورنال: Smithsonian Contributions to Paleobiology
سال: 1984
ISSN: 0081-0266
DOI: 10.5479/si.00810266.55.1