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A Revision of Mid-Cretaceous Textularian Foraminifers from Texas

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A Revision of Mid-Cretaceous Textularian Foraminifers from Texas J.micropalaeontol., 1: 55-69, July 1982 A revision of mid-Cretaceous textularian foraminifers from Texas ALFRE.D R. LOEBLICH & HELEN TAPPAN Department of Earth and Space Sciences, University of California, Los Angeles, California 90024 U.S.A. ABSTRACT. 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 Spiro- plectammina longa are assigned to the family Spiroplectamminidae. A new family Tcxtulariop- sidae is proposed for basically biserial taxa with solid walls and includes Plectinella, Textular- iopsis, 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,Auprotoichus, Haimasiella and Minyaichme. INTRODUCTION The presence of perforated or canaliculate walls in All were found to have solid, noncanaliculate walls, agglutinated foraminifera has been sporadically observed although this is not surprising in view of their very thin but taxonomically neglected. Study of Recent and other walls and generally small size. Cenozoic species by various workers (Hofker, 195 1, 1976; Coleman, 1980; Banner & Pereira, 1981) MATERIAL suggests that a greater emphasis should be placed on Material for the present study has been collected by us such wall characters. Thus, Banner & Pereira (1981) over many years from various outcrop localities in north transferred from Textularia the Cretaceous taxa with and central Texas and southern Oklahoma. Only those solid walls, and regarded these as a new genus localities are listed below from which specimens are Textulariopsis which they placed in the subfamily illustrated herein. This material is from the Goodland Verneuilininae, family Ataxophragmiidae. Formation of the Fredericksburg Group and from all In working on a foraminifera1 suprageneric reclassifi- units of the overlying Washita Group, in Oklahoma and cation, we have reexamined certain mid-Cretaceous north Texas, in ascending order the Duck Creek assemblages from the American Gulf Coast that we had Formation, Fort Worth Formation, Denton Formation, studied earlier, including species originally described as Weno Formation, Paw Paw Formation, Main Street Bigenerina, Siphotextularia, Spiroplectamrnina, and Formation and Grayson Formation, the Duck Creek to Tt9xtularia. Most of the species were originally described Main Street equivalent Georgetown Formation and in the 1930’s and 1940’s, hence solely on the basis of Grayson equivalent Del Rio Formation of Central light microscopy. As most are relatively tiny species, Texas, and the youngest Washita unit, the subsurface details of wall character were not evident. For the Maness Formation of east Texas. In addition, cores present paper we have restudied these species and a few taken from the deep sea on the Blake Escarpment in the additional new species, and have examined half-sectioned Atlantic Ocean were studied. specimens in the scanning electron microscope (SEM) to Locality 1. Grayson Formation at Grayson Bluff, a high, determine the character of their walls. S.W.-facing bluff on Denton Creek, 3.2km E. of Fort Worth-Denton highway, 5.6km N.E. of Roanoke, METHODS Denton County, Texas. Collected April, 1937. In addition to study and camera-lucida illustration of Locality 9. Fort Worth Formation, in deep road cut on these species with the light microscope, half sections W. side of U.S. highway 75, the Denison-Durant road, were prepared of each species with the method described 300m N. of Calvary Cemetery, 0.8km N. of Texas by Hofker (1933) and Coleman (1979). Specimens Highway Department information station, 2.5 km north embedded in paraffin were ground on a 600 size car- of Main Street in Denison, Grayson County, Texas. borundum sheet using castor oil as a lubricant; after Collected July, 1938. pdishing and removal of the paraffin in xylene, Locality 13. Duck Creek Formation, on W. bank of Red specimens were mounted on plugs for SEM examination. River in the S.W. 114, Sec. 22, T. SS., R. 2E., on S.W. 55 I.ocblich Kc Tappan side of Horseshoe Bend, Love County, Oklahoma. Fc railroad underpass, on the Belton-Temple highway Collected August, 1939. (U.S. highway 81), N.E. of Bclton, Bell County, Texas. Locality 36. Main Street Formation, in a road cut about Collected July, 1940. 0.4km along road leading E. to Grayson Bluff from Fort Locality 99. Denton Formation, in a roadside ditch 011 E. Worth-Dcnton highway, 5.6km N.E. of Roanoke and side of road leading S. from Rio Vista, on N.E. corner 1.6km E. of the highway, Denton County, Texas. where 21 minor E. branch road turns from the main S. ('ollectcd September, 1938. road, I .6 km S. of the garage and filling station near the Locality 39. Fort Worth Formation, in the bank of a E. edge of Rio Vista town, in southern Johnson County, tributary to Hickory Creek, just N. of the small concrete Texas. Collected July, 1940. bridge over the creek, 2km N.W. of Krum. Denton hcality 104. Duck Creek Formation, in a high, N.-facing County, Texas. Collected September, 1938. slope on S. bank of Red River. cleared by excavation at Locality 40. Paw Paw Formation. in S. bank of Denton the site of the Denison Dam that forms Lake Texhoma, Creek, just W. of U.S. highway 377 (Fort Worth- N. of Denison, Grayson County, Texas. Collected July, Denton highway), where it crosses Denton Creek. 1940. 5.6km N.E. of Roanoke, Denton County, Texas. Locality 169. Goodland Formation, in a low bluff on E. Collected September. 1938. bank of N. Fork of Mary's Creek at a concrete bridge on Locality 44. Fort Worth Formation. on S. bank of the Fort Worth-Weatherford highway, 18.4km W. of Sycamore Creek, about 15 m E. of Fort Worth- Fort Worth, Tarrant County, Texas. Collected August Crowley road, where it crosses the creek, 2.5 km S. of the 12, 1941. Baptist Seminary Cam pus, in Fort Worth , Ta rriin t Locality 172. Goodland Formation, in ;I low. N.-facing County, Texas. Collected July. 1940. bluff on S. bank of Clear Creek, 0.3 km W. of bridge of Locality 47. Weno Formation, on S. bank of ii tributary Farm Road 425 across Clear Creek, 7.8 km W. of U.S. to Sycamore Creek, which was dammed to form Katy highway 77 junction with the farm road in Sanger. Lakc. 0.4km E. of and below the Katy Lake Dam, S.E. Denton County, Texas. Collected August. of Fort Worth, Tarrant County, Texas. Collected 194 I. September, 1938. Locality 203. Weno Formation, in a road cut on E. side of S. of Locality 48. Fort Worth Formation, on E. side of U.S. Old Mansfield Road, 0.4km bridge over highway 77, just S. of a small bridge, 1.6km W.S.W. of Sycamore Creek, W. of Glen Garden Country Club, 4.8km S.E. of Fort Worth, Tarrant County, Texas. G a i n e sv i 11 e co u r t h o use s q u a re, Coo k e Cou n t y , Tex a s . Collected July, 1940. Collected October, 1943. Locality 55. Paw Paw Formation, in a road cut on N. side Locality 206. Denton Formation, in an intermittent of road, at W. edge of Federal Narcotic Farm, S.E. of stream valley, S. of the road, 0.6km N.E. of Denton Fort Worth, Tarrant County, Tcxas. Collected June, Creek, 2.6km E. of Justin-Ponder road in Justin, 1939. Denton County, Texas. Collected October, 1943. Locality 56. Fort Worth Formation, in a road cut in the Locality 248. Goodland Formation, at Lake Worth 1700 block of East Laneaster Street. just W. of the Dam, in Fort Worth, Tarrant County, Texas. Collected corner of Riverside Drive and Laneaster Street, on Fort July, 1948. Worth-Dallas highway (U.S. 80). in Fort Worth, Tarrant Sample 1026. Paw Paw Formation. in an exposure along a N.-flowing tributary to Clear Creek. 0.8km E. of road, County, Texas. Collectcd June, 1939. 6.8 km clue N. of town square in Denton, Denton County. Locality 57. Duck Creek Formation, in ;I road cut on E. side of U.S. highway 77, just S. of bridge across Red Texas. Collected August, 1949. River, Cooke County, Texas. Collected June, 1939. Subsurface Maness Formation from Shell Oil Company S.T. Stephens No. 1, LaRue area, Henderson Locality 73. Goodland Formation, N.side of road. 6 krn W. of Montgomery Street on Old Stove Foundry Road County, Texas. The Maness Formation was cored from (Vickery Boulevard), at Cragin Knob, in Fort Worth, 3600 to 3665 feet in depth. Tarrant County, Texas. Collected August, 194 1. Atlantic Deep Sea Core A 167-25, a 17Scm core at a water depth of 1745m from the Blake escarpment, at Locality 90. Del Rio Formation, on W. bank of Shoal 28"52'N. Lat., 76'47'W. Long. This material was dated Creek, just S. of bridge of 34th Street, and just N. of a fault, in Austin, Travis County, Texas. Collected July, by A.R. Loeblich, Jr. iis Cenomanian, and slightly 1940. younger than the surface Washita Group of Texas and Oklahoma (Ericson 1961, p. 236). Locality 96. Georgetown Formation, along Smith et al. All types and figured specimens are deposited in the Branch, the first main creek E. of the town of George- U .S . Nation a 1 Muse um , Washington , D .C. town, in an exposure for about 1.2km, N.E.
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