Station 21, tributary of Tehuacana Creek (Paleocene to of the United States)

Where: Limestone County, Texas (31.7° N, 96.5° W: paleocoordinates 36.3° N, 77.2° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Mexia Clay Member (Wills Point Formation), Danian to Danian (66.0 - 59.2 Ma)

• The very compact, gray, fossiliferous clays carrying numerous small corals lies within the Mexia clay member of the Wills Point formation and about 35 feet above the top ledge of the Tehuacana limestone. A few yards north and west of this outcrop along the creek, lignitic Wilcox strata are faulted down against these lower strata of the Wills Point formation.

•Mexia Clay Member is Early-Middle Paleocene = Danian-Selandian according to: Armstrong, A., Nyborg, T., Bishop, G.A., Morales, À.O. and Vega, F.J., 2009. Decapod crustaceans from the Paleocene of Central Texas, USA. Revista Mexicana de Ciencias Geológicas, 26(3), pp.745-763.

Environment/lithology: marginal marine; unlithified, gray claystone

• very compact, gray, fossiliferous clays carrying numerous small corals

Size class: microfossils

• fossiliferous clays carrying numerous small corals

•This is the type locality for Cytherella tumidosa n. sp., C. excavata n. sp., C. symmetrica n. sp., Argilloecia faba n. sp., Paracypris perapiculata n. sp., Bairdia suborbiculata n. sp., Brachycythere formosa n. sp., Cythereis sculptilis n. sp., C. lemnicata n. sp., and Eucythere midwayensis n. sp. Plesiotypes of Cythereis spiniferrima Jones and Sherborn and C. prestwichiana Jones and Sherborn have been figured from these clays.

Collection methods: bulk, sieve

Primary reference: C. I. Alexander. 1934. Ostracoda of the Midway (Eocene) of Texas. Journal of Paleontology 8(2):206-237 [S. Cole/S. Cole/G. Hunt]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 191450: authorized by Selina Cole, entered by Selina Cole on 29.01.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

• This references only lists taxa for which the locality is the type section. Other ostracode and foraminiferan taxa are reported to be present but not listed. Corals are also reported present but not identified.
Ostracoda
 Podocopida - Pontocyprididae
Argilloecia faba n. sp. Alexander 1934 ostracod
 Podocopida - Paracyprididae
Paracypris perapiculata n. sp. Alexander 1934 ostracod
 Podocopida - Xestoleberididae
Xestoleberis truncata n. sp. Alexander 1934 ostracod
 Podocopida - Trachyleberididae
Brachycythere formosa n. sp. Alexander 1934 ostracod
 Podocopida - Bythocytheridae
Monoceratina speciosa n. sp. Alexander 1934 ostracod
 Podocopida - Cytherideidae
Eucythere midwayensis n. sp. Alexander 1934 ostracod
Cytheridea multipunctata n. sp. Alexander 1934 ostracod
 Podocopida - Bairdiidae
Bairdia suborbiculata n. sp. Alexander 1934 ostracod
 Platycopida - Cytherellidae
Cytherella excavata n. sp. Alexander 1934 ostracod
Cytherella tumidosa n. sp. Alexander 1934 ostracod
Cytherella symmetrica n. sp. Alexander 1934 ostracod
 Podocopa - Cytheridae
Cythereis spiniferrima Jones and Sherborn 1889 ostracod
Cythereis sculptilis n. sp. Alexander 1934 ostracod
Cythereis prestwichiana Jones and Sherborn 1887 ostracod
Cythereis (Pterygocythereis) lemnicata n. sp. Alexander 1934 ostracod
 Podocopa - Loxoconchidae
Loxoconcha corrugata n. sp. Alexander 1934 ostracod
Loxoconcha perdecora n. sp. Alexander 1934 ostracod