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Experimental disintegration of regular echinoids; roles of temperature, oxygen, and decay thresholds
Laboratory experiments on regular echinoids indicate that low water temperatures retard organic decomposition far more effectively than anoxia, and that the primary role of anoxia in the preservation…
Survivorship analysis of Paleozoic Crinoidea: effect of filter morphology on evolutionary rates
- T. Baumiller
- 1 July 1993
The "specialized" pinnulate crinoids may be more prone to speciation and extinction than the non-pinnulate "generalists," thus accounting for the observed differences in the evolutionary rates of the three subclasses.
Stalked Crinoid Locomotion, and its Ecological and Evolutionary Implications
The presence of Lauraceae at this latitude in New Zealand and their high diversity clearly implies warmer temperatures than currently exist at lowland locations at that latitude today, which lie to the south of the existing limit of the family.
Taphonomic Inferences on Boring Habit in the Richmondian Onniella meeki Epibole
Back-calculating the biocoenotic boring intensities can provide more accurate paleoecological interpretations of boring habit while remaining numerically conservative and improve estimates of boring stereotypy, as well as indicating a likely contribution of 10–15% predatory boring in the assemblage.
A case of intense predatory drilling of brachiopods from the Middle Miocene of southeastern Poland
Abstract The documentation of biotic interactions in the fossil record is important not only to understanding the earth's paleoecological history, but also to testing the evolutionary role of such…
Testing Predator-Driven Evolution with Paleozoic Crinoid Arm Regeneration
Analysis of 11 Paleozoic crinoid Lagerstätten revealed a significant increase in arm regeneration during the Siluro-Devonian, which implies an important role for predator-driven evolution.
Evaluating the interaction between platyceratid gastropods and crinoids: A cost-benefit approach
- T. Baumiller
- 5 December 2003
The results suggest that some crinoids were well capable of capturing sufficient nutrients to fulfill their metabolic needs as well as those of the infesting platyceratids, and the preference of platycersatids to infest pinnulate crinoid rather than non-pinnulatecrinoids is consistent with the cost–benefit analysis.
Post-Paleozoic crinoid radiation in response to benthic predation preceded the Mesozoic marine revolution
- T. Baumiller, M. Salamon, P. Gorzelak, R. Mooi, C. Messing, F. Gahn
- Biology, MedicineProceedings of the National Academy of Sciences
- 15 March 2010
It is suggested that the appearance and subsequent evolutionary success of motile crinoids were related to benthic predation by post-Paleozoic echinoids with their stronger and more active feeding apparatus and that the predation-driven Mesozoic marine revolution started earlier than in other groups, perhaps soon after the end-Permian extinction.
Infestation of Middle Devonian (Givetian) camerate crinoids by platyceratid gastropods and its implications for the nature of their biotic interaction
The results indicated that for both species of crinoids individuals infested by snails were significantly smaller than uninfested individuals (p < 0.05), confirming the null hypothesis that the crinoid-gastropod relationship was strictly commensal.