A revision of mid-Cretaceous textularian foraminifers from Texas

As Cretaceous species previously placed in Bigenerina, Siphotextularia, and Textularia differ from typical Cenozoic representatives of these genera in having solid non-canaliculate walls, 16 species from the Fredericksburg and Washita Groups (Albian-Cenomanian) of Texas and Oklahoma have been restudied. The new genera Heterantyx with type species H. antonovae sp. nov. and Quasispiroplectammina with type species Spiroplectammina longa are assigned to the family Spiroplectamminidae. A new family Textulariopsidae is proposed for basically biserial taxa with solid walls and includes Plectinella, Textulariopsis, of which two species T. lechriosa and T. texhomensis are new, the reinstated genus Bimonilina, with a new species B. reciprocata, and three new genera, Aaptoioichus, Haimasiella and Minyaichme.

[1]  F. T. Banner,et al.  Some biserial and triserial agglutinated smaller foraminifera; their wall structure and its significance , 1981 .

[2]  A. R. Coleman.  Test structure and function of the agglutinated foraminifera Clavulina , 1980 .

[3]  A. R. Coleman.  Sectioning microfossils; an old method revisited , 1979 .

[4]  M. Ewing,et al.  Atlantic Deep-Sea Sediment Cores , 1961 .

[5]  M. G. Barakat,et al.  Jurassic microfossils from Gebel Maghara, Sinai, Egypt , 1958 .

[6]  A. R. Loeblich,et al.  New Washita Foraminifera [Oklahoma, Texas] , 1946 .

[7]  H. Tappan.  Foraminifera from the Duck Creek Formation of Oklahoma and Texas , 1943 .

[8]  H. Tappan.  Foraminifera from the Grayson Formation of northern Texas , 1940 .

[9]  R. S. Bassler.  An Outline of a Reclassification of the Foraminifera . By Joseph A. Cushman. Contributions from the Cushman Laboratory for Foraminiferal Research, Vol. 3, pt. 1, 1927, pp. 1-105, 21 plates. Published by the author at Sharon, Mass. , 1927, Science.

[10]  Dorothy Ogden Carsey.  Foraminifera of the Cretaceous of Central Texas, 1926 , 1926 .

[11]  J. Hofker.  Further studies on Caribbean Foraminifera , 1976 .

[12]  F. E. Lozo.  Stratigraphic Notes on the Maness (Comanche Cretaceous Shale) , 1951 .

[13]  J. Hofker.  The foraminifera of the Siboga expedition , 1927 .

[14]  Kitchen W. Parker,et al.  VI. On some foraminifera from the North Atlantic and Arctic Oceans, including Davis Straits and Baffin's Bay , 1865, Philosophical Transactions of the Royal Society of London.