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328 results on '"MARTIN, LARRY D."'

4. Rise and Fall of the Beringian Steppe Bison

Author

Shapiro, Beth, Drummond, Alexei J., Rambaut, Andrew, Wilson, Michael C., Matheus, Paul E., Sher, Andrei V., Pybus, Oliver G., Barnes, Ian, Binladen, Jonas, Willerslev, Eske, Hansen, Anders J., Baryshnikov, Gennady F., Burns, James A., Davydov, Sergei, Driver, Jonathan C., Froese, Duane G., Harington, C. Richard, Keddie, Grant, Kosintsev, Pavel, Kunz, Michael L., Martin, Larry D., Stephenson, Robert O., Storer, John, Tedford, Richard, Zimov, Sergei, and Cooper, Alan

Published
2004

5. The earliest North American record of the Antilocapridae (Artiodactyla, Mammalia)

Author

Beatty, Brian L. and Martin, Larry D.

Subjects
Antilocaprid, Artiodactyl, Harrison Formation, Wyoming
Abstract

The Family Antilocapridae is considered to have first appeared in the Early Hemingfordian of western North America. Here we report a mandible of a merycodontine antilocaprid from the Late Arikareean Harrison Formation of eastern Wyoming. The mandible has three lower molars preserved and mandibular ramus features that allow it to be differentiated from other contemporaneous selenodont artiodactyl families, yet the lack of detailed understanding of intraspecific variation in Paracosoryx and Merycodus warrant caution in assigning this to a genus. This new material predates the previous first appearance of antilocaprids by approximately 3–4 million years and suggests that antilocaprid immigration from Eurasian ruminant stock occurred earlier than previously assumed and that caution should be exercised when using first appearances in broader analyses.

Published
2009

10. Symposium on Evolutionary Origin of Feathers: Panel Discussion

Author

Bock, Walter J., Brush, Alan H., Davis, Paul G., Dodson, Peter, Farlow, James O., Harris, Matthew, Martin, Larry D., Pinshow, Berry, Porter, Warren P., Ruben, John, Sawyer, Roger H., Stettenheim, Peter, and Wolf, Blair O.

Published
2000

14. Spatial Response of Mammals to Late Quaternary Environmental Fluctuations

Author

Graham, Russell W., Lundelius, Ernest L., Graham, Mary Ann, Schroeder, Erich K., Toomey, Rickard S., Anderson, Elaine, Barnosky, Anthony D., Burns, James A., Churcher, Charles S., Grayson, Donald K., Guthrie, R. Dale, Harington, C. R., Jefferson, George T., Martin, Larry D., McDonald, H. Gregory, Morlan, Richard E., Semken, Holmes A., Webb, S. David, Werdelin, Lars, and Wilson, Michael C.

Published
1996

46. Torridorefugium eskridgensis (new ichnogenus and ichnospecies): amphibian aestivation burrows from the Lower Permian Speiser Shale of Kansas

Author

Hembree, Daniel I., Hasiotis, Stephen T., and Martin, Larry D.

Subjects
Amphibians -- Research, Paleontology -- Research, Biological sciences, Science and technology
Abstract

Burrows of the lysorophid amphibian Brachydectes elongatus occur in deposits interpreted as ephemeral ponds within the Lower Permian Speiser Shale of eastern Kansas. The burrows of B. elongatus have been previously recorded in the Lower Permian strata of Texas, Oklahoma, and Kansas, but have not been described in detail and an ichnotaxonomic designation has not been provided. Torridorefugium eskridgensis new ichnogenus and ichnospecies show two types of burrow architecture distinguished by width-to-length ratios. Type I burrows are elongate, elliptical tubes 4-32 cm long and 2-7 cm wide. Type II burrows are short, elliptical tubes 1.5-3.5 cm long and 2.5 5 cm wide. Both Type I and II burrows may contain coiled skeletons of B. elongatus. Torridorefugium eskridgensis occur in clusters of up to 45 burrows with maximum concentrations of 20/[m.sup.2]. The type specimens of Torridorefgium eskridgensis occur in a 40-cm-thick lens of calcareous mudstone that fills a 100-m-long paleodepression within a well-developed paleosol. The burrow clusters are capped by surfaces with evidence of subaerial exposure, and overlain by nonburrowed, massive mudstone containing the fossils of the charophyte Stomachara, the ostracodes Carbonita and Paraparchites, fish, amphibians, and reptiles. This succession suggests that lysorophids burrowed in response to episodic, perhaps seasonal, droughts on the Permian midcontinental coastal plain. Permian lysorophid burrowing behavior is analogous to that of the extant aestivating amphibians Amphiuma sp. and Siren intermedia that inhabit ephemeral rivers and ponds of the southeastern United States.

Published
2005

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