WebCtenacanthus: [noun] a genus of Upper Devonian and Lower Permian sharks related to Cladoselache and known chiefly from its very stout fin spines. WebCtenacanthusis an extinct genus of ctenacanthiform shark that lived in the Americas during the Carboniferous. Species[] C. amblyxiphias C. buttersi C. chemungensis C. cliftonensis C. concinnus C. costellatus C. elegans C. furcicarinatus C. major C. maranhensis C. nodocostatus C. terrelli C. tumidus References[]
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WebCtenacanthus terrelli Newberry, 1889; Ctenacanthus tumidus Newberry, 1889; Ctenacanthus vetustus Eastman, 1902; Ctenacanthus wrightii Newberry, 1884; Se også. Liste over forhistoriske bruskfisk slægter; Referencer eksterne links. Fossile hajer i Rocky Mountains: Ctenacanthus og andre Chondrichthyan Spines and Denticles. WebOtanthus is a genus of flowering plants in the chamomile tribe ( Anthemideae) within the daisy family ( Asteraceae or Compositae). [6] The only known species is the cotton weed … does whole wheat contain protein
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WebCtenacanthus [1] is an extinct genus of ctenacanthiform chondrichthyan. Remains have been found in the Bloyd Formation in Arkansas, United States and in South America.[2][3] WebATW030919. Ctenacanthiformes: Ctenacanthus + modern sharks. Most authors probably define this taxon as Ctenacanthus > modern sharks. However, that definition leaves the contents of the group rather vague. … WebOccurrence of a Ctenacanthoid Shark Spine from the Upper Devonian of North Central Iowa. Proc. Iowa Acad. Sci. 81(2): 56-60, 1974. Although a diverse, invertebrate fauna is characteristic of the Upper Devonian, Lime Creek Formation, in north central Iowa, fossil fish remains are sparse. factory work in taiwan