Casa Blanca: Late/Upper Uintan, Texas

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Spinizoncolpites prominatus
Westgate 2001
Langiopollis eocaenica
Westgate 2001
Paraoreomunea sp.
Westgate 2001
Leea sp.
Westgate 2001
Lycopodiopsida - Selaginellales - Selaginellaceae
Selaginella sp. Beauvois 1804
Westgate 2001
Polypodiopsida - Polypodiales - Pteridaceae
Pteris dentata
Westgate 2001
Polypodiopsida - Schizaeales - Schizaeaceae
Lygodiumsporites adriennis
Westgate 2001
Angiospermae - Malvales - Bombacaceae
Bombacacidites paulus
Westgate 2001
Angiospermae - Arecaceae
Spinizonocolpites prominatus
Gee 2001
Nypa sp. van Wurmb 1779
Gee 2001
Gastropoda - Turritellidae
Turritella cortezi
Westgate 2001
Gastropoda - Naticidae
Naticidae indet. Guilding 1834
Westgate 2001
Bivalvia - Ostreida - Ostreidae
Crassostrea amichel
Westgate 2001
Bivalvia - Mytilida - Mytilidae
? Brachidontes sp. Swainson 1840
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
Chondrichthyes - Myliobatiformes - Myliobatidae
Myliobatis sp. Cuvier 1816
Westgate 1989
Rhinoptera sp. Cuvier 1829
Westgate 1989
Chondrichthyes - Myliobatiformes - Dasyatidae
Dasyatis sp. Rafinesque 1810
Westgate 1989
Chondrichthyes - Rhinopristiformes - Pristidae
Pristis sp. Linck 1790
Westgate 1989
Pristis sp. Linck 1790
Westgate 2001
Chondrichthyes - Rajiformes - Rhinobatidae
Rhinobatos sp. Link 1790
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
original and current combination Otodus macrotus
Striatolamia macrota (Agassiz 1838)
Westgate 2001
original and current combination Otodus macrotus
Acipenseriformes
Cylindracanthus sp. Leidy 1856
Westgate 2008
Amphibia - Temnospondyli
Anura indet. (Fischer von Waldheim 1813)
Westgate 1989
Mammalia - Rodentia - Ischyromyidae
Ischyromyidae indet. Alston 1876
two forms
Microparamys sp. Wood 1959
not Laredomys
Mytonomys cf. robustus (Peterson 1919)
68 specimens
Thisbemys sp. Wood 1959
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 - 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
cf. Nonomys sp. Emry and Dawson 1973
Westgate 2001 1 specimen
Mammalia - Rodentia - Cylindrodontidae
Cylindrodontidae indet. Miller and Gidley 1918
said to be new
Mammalia - Primates - Microsyopidae
Microsyops sp. Leidy 1872
11 specimens
Mammalia - Primates
Mahgarita cf. stevensi (Wilson and Szalay 1976)
Westgate 2012
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
synonym of Ourayia
Mammalia - Geolabididae
Centetodon pulcher Marsh 1872
5 specimens
Mammalia - Chiroptera
Chiroptera indet. Blumenbach 1779
Westgate 2012
Mammalia - Perissodactyla - Brontotheriidae
Brontotheriidae indet. (Marsh 1873)
6 specimens
    = Notiotitanops mississippiensis Gazin and Sullivan 1942
Westgate 2009
Mammalia - Perissodactyla - Amynodontidae
Amynodon advenus (Marsh 1875)
5 specimens
also present at TMM 42185
Mammalia - Perissodactyla - Hyracodontidae
? Triplopus sp. Cope 1880
Westgate 2001
Mammalia - Perissodactyla - Equidae
Epihippus cf. gracilis (Marsh 1871)
12 specimens
(1 measurement)
    = Epihippus sp. Marsh 1878
Westgate 2012
"Epihippus gracilis or E. uintensis"
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 - Protoceratidae
Leptoreodon leptolophus Golz 1976
24 specimens
additional specimen from TMM 41871 described by Wilson 1984 (4 measurements)
Leptoreodon pusillus Golz 1976
3 specimens
Toromeryx cf. marginensis Wilson 1974
9 specimens
Mammalia - Agriochoeridae
Protoreodon parvus Scott and Osborn 1887
Westgate 2001
Protoreodon petersoni Gazin 1955
8 specimens
Mammalia
Procynodictis cf. vulpiceps Wortman and Matthew 1899
1 specimen
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 - 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 - Condylarthra - Hyopsodontidae
Hyopsodus cf. uintensis Osborn 1902
3 specimens
Mammalia - Sirenia - Sirenia
Sirenia indet. Illiger 1811
1 specimen
Mammalia - Groeberida
Peratherium comstocki Cope 1884
3 specimens
Peratherium marsupium (Troxell 1923)
4 specimens
    = Herpetotherium marsupium Troxell 1923
Alroy 2002
Reptilia - Testudines - Kinosternoidea
Xenochelys sp. Hay 1906
Westgate 1989
cf. Baptemys sp. Leidy 1870
Westgate 1989
Reptilia - Testudines - Emydidae
Emydidae indet. Rafinesque 1815
Westgate 1989
Reptilia - Testudines
Hadrianus sp. Cope 1872
Westgate 1989
cf. Allaeochelys sp. Noulet 1867
Westgate 1989
Reptilia - Testudines - Trionychidae
Westgate 1989
    = Trionychidae indet. Gray 1825
Alroy 2006
Reptilia - Palaeophiidae
Pterosphenus schucherti Lucas 1898
Westgate 1989
Pterosphenus schucherti Lucas 1898
Westgate 2008
Reptilia - Anguidae
Glyptosaurinae indet. Marsh 1872
Westgate 1989
Glyptosaurinae indet. Marsh 1872
Westgate 2008
Reptilia
Pristichampsus cf. vorax (Troxell 1925)
Westgate 1989
recombined as Boverisuchus vorax
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
Actinopteri - Lepisosteiformes - Lepisosteidae
Lepisosteus sp. Agassiz 1843
Westgate 1989
Actinopteri - Sciaenidae
Jefitchia sp. Frizzell and Dante 1965
Westgate 1989
Actinopteri - Perciformes
Diaphyodus wilsoni n. sp.
Westgate 1989
Actinopteri - Siluriformes - Ariidae
cf. Arius sp. Cuvier and Valenciennes 1840
Westgate 1989
Actinopteri - Elopiformes - Megalopidae
Megalopidae indet. Jordan 1923
Westgate 1989
Actinopteri - Elopiformes - Phyllodontidae
cf. Paralbula marylandica Blake 1940
Westgate 1989
see common names

Geography
Country:United States State/province:Texas County:Webb
Coordinates: 27.5° North, 99.4° West (view map)
Paleocoordinates:29.5° North, 89.8° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Eocene
Stage:Lutetian 10 m.y. bin:Cenozoic 2
*Period:Early/Lower Tertiary *Epoch:Middle Eocene
*Local age/stage:Late/Upper Uintan
Key time interval:Late/Upper Uintan
Age range of interval:46.20000 - 40.40000 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, P. Holroyd, M. Uhen Enterer:J. Alroy, P. Holroyd, M. Uhen
Modifier:M. Uhen Research group:marine invertebrate,vertebrate
Created:1993-02-18 00:00:00 Last modified:2016-08-29 09:13:48
Access level:the public Released:1993-02-18 00:00:00
Creative Commons license:CC BY
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]