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JAMES R. THOMKA
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Journal Article

REPEATED REGENERATION OF CRINOID SPINES IN THE UPPER PENNSYLVANIAN OF EASTERN OHIO: EVIDENCE OF ELEVATED PREDATION INTENSITY AND SIGNIFICANCE FOR PREDATOR-DRIVEN EVOLUTION OF CRINOID MORPHOLOGY

JAMES R. THOMKA, DONALD B. EDDY
Published: 29 November 2018
PALAIOS (2018) 33 (11): 508–513.
DOI: https://doi.org/10.2110/palo.2018.058
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INSIGHTS INTO THE TAXONOMY AND PALEOECOLOGY OF THE ‘BEAD BED' CRINOID (ECHINODERMATA: CRINOIDEA) BASED ON NEW MATERIAL FROM THE LOWER SILURIAN BRASSFIELD FORMATION OF EAST-CENTRAL KENTUCKY

JAMES R. THOMKA, CARLTON E. BRETT
Published: 12 December 2017
PALAIOS (2017) 32 (12): 762–768.
DOI: https://doi.org/10.2110/palo.2017.061
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SIDERITE CONCRETIONS IN THE COPAN CRINOID LAGERSTÄTTE (UPPER PENNSYLVANIAN, OKLAHOMA): IMPLICATIONS FOR INTERPRETING TAPHONOMIC AND DEPOSITIONAL PROCESSES IN MUDSTONE SUCCESSIONS

JAMES R. THOMKA, RONALD D. LEWIS
Published: 01 October 2013
PALAIOS (2013) 28 (10): 697–709.
DOI: https://doi.org/10.2110/palo.2012.p12-130r
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THE UTILITY OF ISOLATED CRINOID OSSICLES AND FRAGMENTARY CRINOID REMAINS IN TAPHONOMIC AND PALEOENVIRONMENTAL ANALYSIS: AN EXAMPLE FROM THE UPPER PENNSYLVANIAN OF OKLAHOMA, UNITED STATES

JAMES R. THOMKA, DANIEL MOSHER, RONALD D. LEWIS, ROGER K. PABIAN
Published: 01 July 2012
PALAIOS (2012) 27 (7): 465–480.
DOI: https://doi.org/10.2110/palo.2011.p11-125r
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GENUS-LEVEL TAPHONOMIC VARIATION WITHIN CLADID CRINOIDS FROM THE UPPER PENNSYLVANIAN BARNSDALL FORMATION, NORTHEASTERN OKLAHOMA

JAMES R. THOMKA, RONALD D. LEWIS, DANIEL MOSHER, ROGER K. PABIAN, PETER F. HOLTERHOFF
Published: 01 June 2011
PALAIOS (2011) 26 (6): 377–389.
DOI: https://doi.org/10.2110/palo.2011.p11-001r
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