. Bulletins of American paleontology. 4S Bulletin 140 48. Text fig. 23. Globigerinella escherl esclieri (Kaufmann). T. L. L. Cat. Nos. 167518, 1,67519. Globotruncana lapparenti s. 1. zone, Upper Cretaceous. All appr. X So. 17 different individuals in umbilical view. Globigerinella esclieri escheri is closely related to the subspecies clavata. Transitional forms between the two subspecies ore common. Typical representatives of the much scarcer clavata with its peculiar prolongation of the end chamber, however, can be determined without difficulty, Rotalia aspera Ehrenberg (1854, figs. 28, 42, 4
. Bulletins of American paleontology. 4S Bulletin 140 48. Text fig. 23. Globigerinella escherl esclieri (Kaufmann). T. L. L. Cat. Nos. 167518, 1,67519. Globotruncana lapparenti s. 1. zone, Upper Cretaceous. All appr. X So. 17 different individuals in umbilical view. Globigerinella esclieri escheri is closely related to the subspecies clavata. Transitional forms between the two subspecies ore common. Typical representatives of the much scarcer clavata with its peculiar prolongation of the end chamber, however, can be determined without difficulty, Rotalia aspera Ehrenberg (1854, figs. 28, 42, 44, 57, 58) may in part possibly represent species of Upper Cretaceous Globigerinellas. Ehrenberg's description and figures, however, are considered to be inadequate, and the name aspera, therefore, should not be used, unless Ehrenberg's material has been revised and a lectotype has been desig- nated. Globigerinella aspera (Carman, 1929, p. 315, pi. 34, fig. 6) from the Niobrara formation of Wyoming, belongs to Globigerinella escheri escheri. Also Globigerina aspera (Ehrenberg), reported by Eranke (1928, p. 192, pi. 18, figs. lOa-c) from various Turonian-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Paleontological Research Institution (Ithaca, N. Y. ); Columbia University. Ithaca, N. Y. , Paleontological Research Institution [etc. ]
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