James Thomka
State University of New York at Plattsburgh, Plattsburgh, NY
Activity
2025
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FIRST REPORT OF REGENERATION IN STELLAROCRINID CRINOID AXILLARY SPINES: EVIDENCE FOR ATTEMPTED PREDATION FROM THE UPPER PENNSYLVANIAN WANN FORMATION OF NORTHEASTERN OKLAHOMA
38 D5. Contributions from Paleontology, Paleoclimatology, and Geoarchaeology (Posters)Sunday, 30 March 20258:30 AM - 2:30 PMNorth Great Hall
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A NEW OCCURRENCE OF PARASITIC PITS IN CRINOIDS FROM THE UPPER JURASSIC OF POLAND AND ARANGE EXTENSION FOR THE ICHNOGENUS TREMICHNUS IN CYRTOCRINID HOSTS IN CENTRAL EUROPE
38 D5. Contributions from Paleontology, Paleoclimatology, and Geoarchaeology (Posters)Sunday, 30 March 20258:30 AM - 2:30 PMNorth Great Hall
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ARCHAEOCIDARID ECHINOID JAW ELEMENTS FROM THE UPPERPENNSYLVANIAN BARNSDALL FORMATION OF NORTHERN OKLAHOMA:MORPHOLOGY AND DISTRIBUTIONAL PATTERNS
38 D5. Contributions from Paleontology, Paleoclimatology, and Geoarchaeology (Posters)Sunday, 30 March 20258:30 AM - 2:30 PMNorth Great Hall
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PETROLOGY OF THE MIDDLE SILURIAN (WENLOCK: SHEINWOODIAN) MASSIE FORMATION OF THE CINCINNATI ARCH REGION: ANALYSIS OF UNDOLOMITIZED STRATA FROM SOUTHEASTERN INDIANA
39 D6. Sediments, Stratigraphy, Geomorphology, and Coastal Geoscience Contributions (Posters)Sunday, 30 March 20258:30 AM - 2:30 PMNorth Great Hall
2024
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PELMATOZOAN ECHINODERMS AS HOSTS TO PIT-FORMING PARASITES: PALEOECOLOGICALLY SIGNIFICANT EXAMPLES FROM THE MIDDLE PALEOZOIC
22 Echinoderm Paleobiology: Evolution, Ecology, and Earth HistoryMonday, 22 April 20241:30 PM - 5:30 PMMojave Room, Oasis Hotel
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ARE BIFURCATED PIRASOCRINID CRINOID TEGMEN SPINES THE RESULT OF A NORMAL GROWTH PROCESS OR A PATHOLOGICAL RESPONSE TO PREDATION-INDUCED DAMAGE? PRELIMINARY STATISTICAL RESULTS
6 D4. Paleontology/Paleoclimatology (Posters)Sunday, 21 April 20241:30 PM - 5:30 PMGrand Ballroom, Oasis CC
2023
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INFLUENCE OF REDOX RHYTHMS ON MAGNETIC SUSCEPTIBILITY TRENDS IN PALEOZOIC MARINE STRATA: PILOT STUDIES FROM THE SILURIAN AND MISSISSIPPIAN OF THE EASTERN MIDCONTINENT
230 D17. Recent Advances in Sedimentology and Stratigraphy (Posters)Wednesday, 18 October 20238:00 AM - 5:30 PMHall B
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THE RARE BECOMES COMMON: NEW RECORDS OF UPPER PENNSYLVANIAN CRINOID SPINES WITH MULTIPLE PLANES OF REGENERATION
166 D25. Recent Developments in Paleoecology (Posters)Tuesday, 17 October 20238:00 AM - 5:30 PMHall B
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NAUTILOID CEPHALOPODS AS SUBSTRATA FOR ENCRUSTATION BY STALKED ECHINODERMS IN THE MIDDLE SILURIAN (WENLOCK) MASSIE FORMATION OF SOUTHEASTERN INDIANA
7 D5. Paleontology and Paleoclimatology (Posters)Friday, 17 March 20238:00 AM - 12:00 PMGrand Ballroom A–D
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DISTRIBUTION AND TAPHONOMY OF CRINOIDS THROUGH THE ‘ROARING BROOK BUTTER SHALE’ INTERVAL OF THE WAYNESVILLE FORMATION (UPPER ORDOVICIAN: KATIAN, RICHMONDIAN), SOUTHEASTERN INDIANA
7 D5. Paleontology and Paleoclimatology (Posters)Friday, 17 March 20238:00 AM - 12:00 PMGrand Ballroom A–D
2022
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TESTING THE SENSITIVITY OF MAGNETIC SUSCEPTIBILITY TO UNCONFORMITIES, FLOODING SURFACES, AND REDOX RHYTHMS: SALUDA THROUGH LAUREL FORMATIONS (UPPER ORDOVICIAN THROUGH MIDDLE SILURIAN) OF WESTERN KENTUCKY
244 D34. Recent Advances in Stratigraphy (Posters)Wednesday, 12 October 20229:00 AM - 1:00 PMExhibit Hall F
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REGENERATION FREQUENCY OF PIRASOCRINID CLADID CRINOID SPINES IN THE UPPER PENNSYLVANIAN WANN AND BARNSDALL FORMATIONS OF NORTHEASTERN OKLAHOMA
63 D25. Paleontology: Recent Developments in Paleoecology and Taphonomy (Posters)Sunday, 9 October 20222:00 PM - 6:00 PMExhibit Hall F
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TAPHONOMY OF NAUTILOID CEPHALOPODS FROM THE MIDDLE SILURIAN MASSIE FORMATION OF SOUTHEASTERN INDIANA: PRELIMINARY RESULTS
63 D25. Paleontology: Recent Developments in Paleoecology and Taphonomy (Posters)Sunday, 9 October 20222:00 PM - 6:00 PMExhibit Hall F
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STRONGLY ASYMMETRICAL RADICLE GROWTH IN ATTACHMENT STRUCTURES OF SILURIAN EUCALYPTOCRINITES (CRINOIDEA) ENCRUSTING HOLOCYSTITES (DIPLOPORITA)
47 Under the (Ancient) Sea: Marine Life from the Coastal to Great Plains (Posters)Friday, 8 April 20221:30 PM - 5:30 PMJunior Ballroom B
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MULTIPLE FORMS OF BIOIMMURATION IN A CORAL-CRINOID-BRYOZOAN ASSOCIATION FROM THE MIDDLE DEVONIAN ONONDAGA FORMATION OF SOUTHERN ONTARIO
6 D5. Paleontology (Posters)Sunday, 20 March 20228:00 AM - 12:00 PMFreedom Hall A
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RELATIONSHIPS BETWEEN MAGNETIC SUSCEPTIBILITY AND CARBONATE CONTENT IN METER-SCALE PERITIDAL RHYTHMS: UPPER ORDOVICIAN CROWN POINT FORMATION, NORTHEASTERN NEW YORK
8 D7. Sedimentology and Stratigraphy (Posters)Sunday, 20 March 20228:00 AM - 12:00 PMFreedom Hall A
2021
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SITE-SELECTIVE PARASITIC EMBEDMENT STRUCTURES ON MIDDLE SILURIAN CRINOID COLUMN MATERIAL FROM WESTERN ESTONIA
T94 Biotic Interactions through Time (Posters)Monday, 11 October 20219:00 AM - 1:00 PMExhibit Hall A
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MAGNETIC SUSCEPTIBILITY OF INTER-MOUND SHALLOW-WATER CARBONATES IN THE UPPER ORDOVICIAN CROWN POINT FORMATION (CHAZY GROUP) OF NORTHEASTERN NEW YORK
93 D20. Recent Advances in Paleontology III (Posters)Monday, 11 October 20219:00 AM - 1:00 PMExhibit Hall A
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ALLOCHTHONOUS CRINOID MATERIAL FROM ECHINODERM-POOR LITHOFACIES IN THE UPPER ORDOVICIAN GRANT LAKE FORMATION OF NORTHERN KENTUCKY
18 D5. Sedimentology, Stratigraphy, and PaleontologyMonday, 15 March 20211:30 PM - 5:50 PMPortland
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INTERACTIONS BETWEEN CORALS AND STALKED ECHINODERMS IN THE MIDDLE SILURIAN (WENLOCK: SHEINWOODIAN) MASSIE FORMATION OF SOUTHERN INDIANA
18 D5. Sedimentology, Stratigraphy, and PaleontologyMonday, 15 March 20211:30 PM - 5:50 PMPortland
2020
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SEQUENTIAL ENCRUSTATION OF A MIDDLE SILURIAN NAUTILOID CEPHALOPOD (MICHELINOCERAS?) BY THE BLASTOZOAN ECHINODERMS PAULICYSTIS (DIPLOPORITA) AND CARYOCRINITES (RHOMBIFERA)
T204 Biotic Interactions through Time IIThursday, 29 October 20201:30 PM - 5:30 PMMeeting Rooms
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CRYPTIC INTERACTION BETWEEN STALKED ECHINODERM RADICULAR ATTACHMENT STRUCTURES ON A MIDDLE SILURIAN HARDGROUND
23 D15. Paleontology (Posters)Friday, 20 March 20201:30 PM - 5:30 PMGrand Ballroom A–D
2019
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STEREOMIC MICROSTRUCTURE OF CRINOID SPINE REGENERATION: EXAMPLES FROM THE UPPER PENNSYLVANIAN OF EASTERN OHIO
118 D24. Paleontology: Phylogenetic/Morphological Patterns (Posters)Monday, 23 September 20199:00 AM - 6:30 PMHall AB, North Building
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“PHOSPHATIZATION” OF ECHINODERM OSSICLES: INSIGHTS FROM ORDOVICIAN AND MODERN ENVIRONMENTS
T68 The Ordovician Earth: Integrated Perspectives on the Fossil and Rock RecordsSunday, 22 September 20191:30 PM - 5:30 PMRoom 228AB, North Building