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Spinosity, regeneration, and targeting among Paleozoic crinoids and their predators
The data corroborate the hypothesis that predators targeted epibionts on camerate crinoids and anal sacs on advanced cladids and suggest that the replacement of shearing predators by crushing predators after the Hangenberg extinction affected the locations of spines in Mississippian camerates.
Temporal trends of predation resistance in Paleozoic crinoid arm branching morphologies
It is concluded that decreasing EAL signals a selective pressure in favor of resistance to grazing predation in camerates but not in other subclasses before the Mississippian, with an apparent relaxation in this constraint after the late Devonian extinctions.
Size and shape stasis in late Pleistocene mammals and birds from Rancho La Brea during the Last Glacial-Interglacial cycle
The data show that birds and mammals at Rancho La Brea show complete stasis and were unresponsive to the major climate change that occurred at 20 ka, consistent with other studies of Pleistocene animals and plants.
Predation, Resistance, and Escalation in Sessile Crinoids.
Predation, resistance, and escalation in sessile crinoids is studied in order to establish a strategy for sustainable development in the presence of these animals.
Pleistocene fossils related to the living California condor (Gymnogyps californianus) have been found in several locations in western North America. Different authors have either assigned these to
Growth, Injury, and Population Dynamics in the Extant Cyrtocrinid Holopus mikihe (Crinoidea, Echinodermata) near Roatan, Honduras
Cyrtocrinids attributed to Holopus mikihe Donovan and Pawson, 2008, have been observed in large numbers via submersible off the western coast of Roatan, Honduras, on vertical and overhanging walls at depths between 430 and 640 m.
A New Tool for Deep-Down Data Mining
Stasis in the smaller owls from Rancho La Brea during the last glacial-interglacial climate change
Conventional evolutionary biology highlights examples like the Galápagos finches, which show rapid responses to climatic change. Previous studies of many common birds of La Brea, including Teratornis