PBDB Collection

Casa Blanca: Late Uintan, Texas

List of taxa

Where & when

Geology

Taphonomy & methods

Metadata & references

Taxonomic list

Angiospermae - Malvales - Bombacaceae

	Bombacacidites paulus	Westgate 2001
Angiospermae - Arecaceae

	Spinizonocolpites prominatus	Gee 2001

	Nypa sp. van Wurmb 1779	Gee 2001
Lycopodiopsida - Selaginellales - Selaginellaceae

	Selaginella sp. Beauvois 1804	Westgate 2001
Polypodiopsida - Schizaeales - Schizaeaceae

	Lygodiumsporites adriennis	Westgate 2001
Polypodiopsida - Polypodiales - Pteridaceae

	Pteris dentata	Westgate 2001
Actinopteri - Elopiformes - Phyllodontidae

	cf. Paralbula marylandica Blake 1940	Westgate 1989
Actinopteri - Elopiformes - Megalopidae

	Megalopidae indet. Jordan 1923	Westgate 1989
Actinopteri - Siluriformes - Ariidae

	cf. Arius sp. Cuvier and Valenciennes 1840	Westgate 1989
Actinopteri - Perciformes

	Diaphyodus wilsoni n. sp.	Westgate 1989
Actinopteri

	Cylindracanthus sp. Leidy 1856	Westgate 2008
Actinopteri - Sciaenidae

	Jefitchia sp. Frizzell and Dante 1965	Westgate 1989
Actinopteri - Lepisosteiformes - Lepisosteidae

	Lepisosteus sp. Agassiz 1843	Westgate 1989
Reptilia

	Pristichampsus cf. vorax (Troxell 1925)	Westgate 1989

	Allognathosuchus sp. Mook 1921	Westgate 1989

	Caimaninae indet. Brochu 1999	Westgate 2008

	Aves indet. Linnaeus 1758	Westgate 1989
Reptilia - Gruiformes

	Gruiformes indet. Bonaparte 1854	Westgate 2001
Reptilia - Anguidae

	Glyptosaurinae indet. Marsh 1872	Westgate 1989

	Glyptosaurinae indet. Marsh 1872	Westgate 2008
Reptilia - Palaeophiidae

	Pterosphenus schucherti Lucas 1898	Westgate 1989

	Pterosphenus schucherti Lucas 1898	Westgate 2008
Reptilia - Testudines - Trionychidae

	Trionyx sp. Geoffroy Saint-Hilaire 1809	Westgate 1989
	= Trionychidae indet. Gray 1825	Alroy 2006
Reptilia - Testudines - Kinosternoidea

	Xenochelys sp. Hay 1906	Westgate 1989

	cf. Baptemys sp. Leidy 1870	Westgate 1989
Reptilia - Testudines

	cf. Allaeochelys sp. Noulet 1867	Westgate 1989

	Hadrianus sp. Cope 1872	Westgate 1989
Reptilia - Testudines - Emydidae

	Emydidae indet. Rafinesque 1815	Westgate 1989
Mammalia

	Peratherium comstocki Cope 1884		3 specimens

	Peratherium marsupium (Troxell 1923)		4 specimens
	= Herpetotherium marsupium Troxell 1923	Alroy 2002
Mammalia - Sirenia - Sirenia

	Sirenia indet. Illiger 1811		1 specimen
Mammalia - Chiroptera

	Chiroptera indet. Blumenbach 1779	Westgate 2012
Mammalia - Geolabididae

	Centetodon pulcher Marsh 1872		5 specimens
Mammalia - Carnivora - Miacidae

	Uintacyon sp. Leidy 1873		1 specimen
	= cf. Miocyon sp. Matthew 1909	Alroy 2002
	comparisons are to "U." scotti, see Westgate 1990
Mammalia

	Procynodictis cf. vulpiceps Wortman and Matthew 1899		1 specimen
Mammalia - Acreodi - Mesonychidae

	Mesonychidae indet. Cope 1875		1 specimen
	= Harpagolestes cf. uintensis Scott 1888	Westgate 2009

	cf. Harpagolestes uintensis (Scott 1888)	Westgate 2009
Mammalia - Acreodi

	cf. Simidectes magnus (Peterson 1919)		1 specimen
Mammalia - Leptochoeridae

	Leptochoeridae indet. Marsh 1894		6 specimens
	= Laredochoerus edwardsi n. sp. Westgate 1994	Westgate 1994

	Laredochoerus edwardsi n. gen., n. sp. Westgate 1994	Westgate 2001
Mammalia - Agriochoeridae

	Protoreodon petersoni Gazin 1955		8 specimens

	Protoreodon parvus Scott and Osborn 1887	Westgate 2001
Mammalia - Protoceratidae

	Toromeryx cf. marginensis Wilson 1974		9 specimens

	Leptoreodon leptolophus Golz 1976		24 specimens
	additional specimen from TMM 41871 described by Wilson 1984 (4 measurements)

	Leptoreodon pusillus Golz 1976		3 specimens
Mammalia - Perissodactyla - Equidae

	Epihippus cf. gracilis (Marsh 1871)		12 specimens
	(1 measurement)
	= Epihippus sp. Marsh 1878	Westgate 2012
	"Epihippus gracilis or E. uintensis"
Mammalia - Perissodactyla - Brontotheriidae

	Brontotheriidae indet. (Marsh 1873)		6 specimens
	= Notiotitanops mississippiensis Gazin and Sullivan 1942	Westgate 2009
Mammalia - Perissodactyla - Hyracodontidae

	? Triplopus sp. Cope 1880	Westgate 2001
Mammalia - Perissodactyla - Amynodontidae

	Amynodon advenus (Marsh 1875)		5 specimens
	also present at TMM 42185
Mammalia - Rodentia

	cf. Nonomys sp. Emry and Dawson 1973	Westgate 2001	1 specimen
Mammalia - Rodentia - Sciuravidae

	Pauromys sp. Troxell 1923		85 specimens
	(3 measurements)
	= Pauromys simplex n. sp. Walton 1993	Walton 1993
	"Pauromys sp. new": "Group 2" also present; all from TMM 42486
Mammalia - Rodentia - Laredomyidae

	Laredomys riograndensis n. sp. Wilson and Westgate 1991	Wilson and Westgate 1991	6 specimens
	may include unidentified mammal, said to be new
Mammalia - Rodentia - Ischyromyidae

	Ischyromyidae indet. Alston 1876
	two forms

	Microparamys sp. Wood 1959
	not Laredomys

	Thisbemys sp. Wood 1959

	Mytonomys cf. robustus (Peterson 1919)		68 specimens
Mammalia - Rodentia - Cylindrodontidae

	Cylindrodontidae indet. Miller and Gidley 1918
	said to be new
Mammalia - Rodentia - Eutypomyidae

	Eutypomyidae indet. Miller and Gidley 1918		121 specimens
	(3 measurements)
	= Microeutypomys karenae n. sp. Walton 1993	Walton 1993
	from TMM 42486
Mammalia - Primates - Microsyopidae

	Microsyops sp. Leidy 1872		11 specimens
Mammalia - Primates - Omomyidae

	Macrotarsius cf. jepseni (Robinson 1968)		1 specimen

	Omomys sp. Leidy 1869		10 specimens
	= Omomys cf. carteri Leidy 1869	Williams and Kirk 2008

	? Mytonius sp. n. sp. Robinson 1968	Westgate 2001
Mammalia - Primates

	Mahgarita cf. stevensi (Wilson and Szalay 1976)	Westgate 2012
Mammalia - Condylarthra - Hyopsodontidae

	Hyopsodus cf. uintensis Osborn 1902		3 specimens
Amphibia - Temnospondyli

	Anura indet. (Fischer von Waldheim 1813)	Westgate 1989
Chondrichthyes - Carcharhiniformes - Carcharhinidae

	Carcharhinus sp. de Blainville 1816	Westgate 1989
	[entered as Carcarhinus sp.]

	Carcharhinus sp. de Blainville 1816	Westgate 2001
Chondrichthyes - Carcharhiniformes - Galeocerdidae

	Galeocerdo eaglesomei White 1926	Westgate 1989

	Galeocerdo eaglesomei White 1926	Westgate 2001
Chondrichthyes - Lamniformes - Mitsukurinidae

	Striatolamia macrota (Agassiz 1838)	Westgate 1989

	Striatolamia macrota (Agassiz 1838)	Westgate 2001
Chondrichthyes - Rajiformes - Rhinobatidae

	Rhinobatos sp. Link 1790	Westgate 1989
Chondrichthyes - Rhinopristiformes - Pristidae

	Pristis sp. Linck 1790	Westgate 1989

	Pristis sp. Linck 1790	Westgate 2001
Chondrichthyes - Myliobatiformes - Dasyatidae

	Dasyatis sp. Rafinesque 1810	Westgate 1989
Chondrichthyes - Myliobatiformes - Myliobatidae

	Myliobatis sp. Cuvier 1816	Westgate 1989
Chondrichthyes - Myliobatiformes - Rhinopteridae

	Rhinoptera sp. Cuvier 1829	Westgate 1989
unclassified

	Spinizoncolpites prominatus	Westgate 2001

	Langiopollis eocaenica	Westgate 2001

	Paraoreomunea sp.	Westgate 2001

	Leea sp.	Westgate 2001
Gastropoda - Naticidae

	Naticidae indet. Guilding 1834	Westgate 2001
Gastropoda - Turritellidae

	Turritella cortezi	Westgate 2001
Bivalvia - Mytilida - Mytilidae

	? Brachidontes sp. Swainson 1840	Westgate 2001
Bivalvia - Ostreida - Ostreidae

	Crassostrea amichel	Westgate 2001
Malacostraca - Decapoda

	Decapoda indet. Latreille 1802	Westgate 2001
Ostracoda

	Ostracoda indet. Latreille 1802	Westgate 2001
Ostracoda - Podocopida - Bythocyprididae

	Bythocypris indet. Brady 1880	Westgate 2001
see common names

Geography

Country:	United States	State/province:	Texas	County:	Webb
Coordinates:	27.5° North, 99.4° West (view map)
Paleocoordinates:	33.3° North, 82.0° West (Wright 2013)
Basis of coordinate:	stated in text
Geographic resolution:	outcrop

Time

Period:	Paleogene	Epoch:	Eocene
10 m.y. bin:	Cenozoic 2-3
*Period:	Early/Lower Tertiary	*Epoch:	Middle Eocene
*Local age/stage:	Late/Upper Uintan
Key time interval:	Late Uintan
Age range of interval:	46.2 - 39.7 m.y. ago
* legacy (obsolete) database fields

Stratigraphy

Formation:	Laredo
Stratigraphy comments: Uinta C

Lithology and environment

Primary lithology:	sandstone
Lithology description: "massive sandstone, fine-grained"
Environment:	estuary/bay
Geology comments: "tropical coastal conditions... mangrove swamp... estuarine" (Westgate 1989)

Taphonomy

Modes of preservation:	body
Size of fossils:	macrofossils,mesofossils

Collection methods and comments

Collection methods:	bulk,selective quarrying,sieve,field collection
Minimum sieve size:	1.400
Collection size:	391 specimens
Reason for describing collection:	taxonomic analysis
Museum repositories:	TMM
Collection method comments: "Vertebrates were recovered by plaster jacketing and bulk sampling. More than 5,000 kg of sediment was screen-washed... [using] fine screen with a mesh of 11 x 7 threads /cm2"
Taxonomic list comments:two isolated specimens are from nearby TMM 41871 and TMM 42185, which are in the same unit Westgate 1990 reports NISP 101 excluding rodents and indeterminate records; later publications report 288, for a total of 389 plus two species lacking counts; Westgate 1988 reports "nearly 700" and Westgate 1990 "over 700," and I believe the discrepancy is due to counting indeterminate specimens said to be Uinta C

Metadata

Also known as:	TMM 42486; Spillway Quarry
Database number:	16542
Authorizer:	J. Alroy, M. Uhen, P. Holroyd	Enterer:	J. Alroy, P. Holroyd, M. Uhen
Modifier:	M. Uhen	Research group:	marine invertebrate,vertebrate
Created:	1993-02-18 00:00:00	Last modified:	2025-02-22 15:12:02
Access level:	the public	Released:	1993-02-18 00:00:00
Creative Commons license:	CC0

Reference information

Primary reference:

3615.

J. W. Westgate. 1988. Biostratigraphic implications of the first Eocene land-mammal fauna from the North American coastal plain. Geology 16:995-998 [J. Alroy/J. Alroy/M. Uhen]

Secondary references:

6294		J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
18120		J. Alroy. 2006. Synonymies and reidentifications of North American fossil vertebrates. [J. Alroy/J. Alroy/J. Alroy]
72298		C. T. Gee. 2001. The mangrove palem Nypa in the geologic past of the New World. Wetlands Ecology and Management 9:181-194 [M. Uhen/M. Uhen]
3547		A. H. Walton. 1993. Pauromys and other small Sciuravidae (Mammalia: Rodentia) from the middle Eocene of Texas. Journal of Vertebrate Paleontology 13(2):243-261 [J. Alroy/J. Alroy/P. Wagner]
3548		A. H. Walton. 1993. Pauromys and Other Small Sciuravidae (Mammalia: Rodentia) from the Middle Eocene of Texas. Journal of Vertebrate Paleontology 13(2):243-261 [J. Alroy/J. Alroy/J. Ju]
702		J. W. Westgate. 1989. Lower vertebrates from an estuarine facies of the Middle Eocene Laredo Formation (Claiborne Group), Webb County, Texas. Journal of Vertebrate Paleontology 9(3):282-294 [J. Alroy/J. Alroy/J. Alroy]
3618		J. W. Westgate. 1994. A New Leptochoerid from Middle Eocene (Uintan) Deposits of the Texas Coastal Plain. Journal of Vertebrate Paleontology 14(2):296-299 [J. Alroy/J. Alroy/J. Ju]
12028		J. W. Westgate. 2001. Paleoecology and biostratigraphy of marginal marine gulf coast Eocene vertebrate localities. Eocene Biodiversity: Unusual Occurrences and Rarely Sampled Habitats 263-297 [M. Uhen/M. Uhen/M. Uhen]
40971		J. W. Westgate. 2008. Vertebrates from a middle Eocene estuarine mangrove community in the Rio Grande Embayment. Abstracts with Programs - Geological Society of America 40(3):3-4 [M. Uhen/M. Uhen]
53393		J. W. Westgate. 2009. First records of two large land mammals in middle Eocene coastal plain strata of Texas. Abstracts with Programs - Geological Society of America 41(7):106 [M. Uhen/C. Peredo]
60251		J. W. Westgate. 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 [P. Holroyd/P. Holroyd]
29561		B. A. Williams and E. C. Kirk. 2008. New Uintan primates from Texas and their implications for North American patterns of species richness during the Eocene. Journal of Human Evolution 55(6):927-941 [J. Alroy/J. Alroy]
3674		J. A. Wilson and J. W. Westgate. 1991. A Lophodont Rodent from the Middle Eocene of the Gulf Coastal Plain, Texas. Journal of Vertebrate Paleontology 11(2):257-260 [J. Alroy/J. Alroy/J. Ju]