CEES Seminar - Sept 15th, 3:30

[Natalie Campbell]

The CEES Seminar Series presents:

*Dr. James Thomka*, Assistant Professor Geology, Center for Earth and
Environmental Science SUNY Plattsburgh

*Parasites of ancient stalked echinoderms: The fossil record, evolutionary
significance, and new developments*

In spite of the historic emphasis on competition, antagonistic biotic
interactions are increasingly recognized as major drivers of long-term and
large-scale evolutionary trends. Predator-prey relationships over
evolutionary timescales have been extensively studied, but an equally
important form of antagonistic interaction--that involving parasites and
hosts--remains more poorly understood, primarily because of limitations
imposed by biases in the fossil record. Fortunately, stalked echinoderms
(pelmatozoans) are characterized by a rare combination of properties that
make them ideally suited for study of the effects of host-selective
parasitic infestation over deep (i.e., evolutionarily significant)
timescales. This presentation focuses on the two most common manifestations
of parasitism in pelmatozoan echinoderm hosts: development of swollen pit
structures and encrustation by platyceratid gastropods. Morphological,
ecological, and other effects driven by parasitism of host lineages are
highlighted in the context of evolutionary change.
*Friday Sept 15th **3:30pm. *
*Hudson 106*


*All seminars are free and open to the public. *

If you have any questions regarding the seminar please contact Dr. Mark
Lesser (mless004 at plattsburgh.edu)
[image: CEES seminar poster_Thomka_Sept15.jpg]
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