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Yegua, Texas, USA

Formation	Yegua
Age:	41.3 - 37.2 Ma Eocene
Interval	Middle Eocene
Lithology	claystone, sandstone
Number of Collections	9
Number of Occurrences	86

Recorded Sample Locations

Location	Region	Stratigraphic Name
Loc. 3	Houston County, Texas, USA	Yegua
J. H. Giesenschlag property	Burleson County, Texas, USA	Yegua
Orell's Crossing Horizon No. 5	Lee County, Texas, USA	Yegua

Recorded Fossils

Accepted Name	Type	Hierarchy	Age
Quinqueloculina sp. genus	6	Chromista : Foraminifera : Tubothalamea : Miliolida : Hauerinidae : *Quinqueloculina*	41.3 - 38 Ma Eocene
Cythere sp. genus	6	Animalia : Arthropoda : Ostracoda : Podocopida : Cytheridae : *Cythere*	41.3 - 38 Ma Eocene
Cythereis sp. genus	6	Animalia : Arthropoda : Ostracoda : Podocopida : Trachyleberididae : *Cythereis*	41.3 - 38 Ma Eocene
Cytherella sp. genus	6	Animalia : Arthropoda : Ostracoda : Platycopina : Cytherellidae : *Cytherella*	41.3 - 38 Ma Eocene
Bairdia sp. genus	6	Animalia : Arthropoda : Ostracoda : Podocopida : Bairdiidae : *Bairdia*	41.3 - 38 Ma Eocene
Cytheridea (Cytheridea) mulleri species	7	Animalia : Arthropoda : Ostracoda : Podocopida : Cytherideidae : Cytheridea : *Cytheridea (Cytheridea) mulleri*	41.3 - 38 Ma Eocene
Cytheropteron sp. genus	6	Animalia : Arthropoda : Ostracoda : Podocopida : Cytheruridae : *Cytheropteron*	41.3 - 38 Ma Eocene
Ariidae family	5	Animalia : Chordata : Actinopteri : Siluriformes : Ariidae	48.6 - 37.2 Ma Eocene
Dasyatidae family	5	Animalia : Chordata : Chondrichthyes : Myliobatiformes : Agabelus : Dasyatidae	48.6 - 37.2 Ma Eocene
Pristidae family	5	Animalia : Chordata : Elasmobranchii : Rhinopristiformes : Pristidae	48.6 - 37.2 Ma Eocene
Heptacodon yeguaensis species	7	Animalia : Chordata : Mammalia : Artiodactyla : Anthracotheriidae : Heptacodon : *Heptacodon yeguaensis*	48.6 - 37.2 Ma Eocene
Protocetidae family	5	Animalia : Chordata : Mammalia : Cetacea : Protocetidae	41.3 - 38 Ma Eocene
Crocodylia order	4	Animalia : Chordata : Reptilia : Crocodylia	48.6 - 37.2 Ma Eocene
Palaeophis sp. genus	6	Animalia : Chordata : Reptilia : Squamata : Palaeophiidae : *Palaeophis*	48.6 - 37.2 Ma Eocene
Dermatemydidae family	5	Animalia : Chordata : Reptilia : Testudines : Dermatemydidae	48.6 - 37.2 Ma Eocene
Echmatemys sp. genus	6	Animalia : Chordata : Reptilia : Testudines : Geoemydidae : *Echmatemys*	48.6 - 37.2 Ma Eocene
Trionychidae family	5	Animalia : Chordata : Reptilia : Testudines : Trionychidae	48.6 - 37.2 Ma Eocene
Ceratobulimina sp. genus	6	Chromista : Foraminifera : Globothalamea : Robertinida : Ceratobuliminidae : *Ceratobulimina*	41.3 - 38 Ma Eocene
Eponides sp. genus	6	Chromista : Foraminifera : Globothalamea : Rotaliida : Eponididae : *Eponides*	41.3 - 38 Ma Eocene
Cristellaria sp. genus	6	Chromista : Foraminifera : Lagenida : Lagenidae : *Cristellaria*	41.3 - 38 Ma Eocene
Guttulina problema species	7	Foraminifera : Polymorphinidae : Guttulina : *Guttulina problema*	41.3 - 38 Ma Eocene
Polymorphina sp. genus	6	Chromista : Foraminifera : Lagenida : Polymorphinidae : *Polymorphina*	41.3 - 38 Ma Eocene

References

Stadnichenko M. M. (1927) The Foraminifera and Ostracoda of the marine Yegua of the type sections, Journal of Paleontology 1 3, 221-243

Holroyd P. A. (2002) New record of Anthracotheriidae (Artiodactyla: Mammalia) from the middle Eocene Yegua Formation (Claiborne Group), Houston County, Texas, Texas Journal of Science 54 4, 301-308

Westgate J. W. (2012) Palaeoecology of a primate-friendly, middle Eocene community from Laredo, Texas and a review of stratigraphic occurrences of Paleogene land mammals across the Gulf Coastal Plain, USA, Palaeobiodiversity and Palaeoenvironments 92, 497-505 doi:10.1007/s12549-012-0084-6

Uhen M. D. (2013) A review of North American Basilosauridae, Alabama Museum of Natural History Bulletin 31 2, 1-45

Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!

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