Hystrichosphaerids and Dinoflagellates from the Permian of Kansas
1963; Micropaleontology Press; Volume: 9; Issue: 3 Linguagem: Inglês
10.2307/1484757
ISSN1937-2795
Autores Tópico(s)Plant Diversity and Evolution
ResumoA hystrichosphaerid-dinoflagellate assemblage from the Permian (Leonardian) Wellington formation of Kansas is described and figured. It includes two new species of hystrichosphaerids, two new dinoflagellate genera, Nannoceratopsiella and Kofoidopsis, one new species of Deflandrea?, one undetermined species of Peridinium, and a dinoflagellate genus and species of unknown affinities. The hystrichosphaerids occur at horizons that, although barren of fresh-water clam shrimps (Conchostraca), are the equivalents of clam shrimp-bearing beds in the area. The dinoflagellates actually occur in a clam shrimpbearing bed. Both occurrences indicate invasion by a restricted tongue of a salt sea over a coastal flat on which there were clam shrimp ponds. The Leonardian dinoflagellates illustrated in this paper are apparently the oldest at present known in the world. Hystrichosphaerids and dinoflagellates from the Permian of Kansas PAUL TASCH University of Wichita Wichita, Kansas
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