Casa Blanca (Eocene of the United States)

Also known as TMM 42486; Spillway Quarry

Where: Webb County, Texas (27.5° N, 99.4° W: paleocoordinates 29.5° N, 89.8° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Laredo Formation, Late/Upper Uintan (46.2 - 40.4 Ma)

• Uinta C

Environment/lithology: estuary or bay; sandstone

• "tropical coastal conditions... mangrove swamp... estuarine" (Westgate 1989)
• "massive sandstone, fine-grained"

Size classes: macrofossils, mesofossils

Reposited in the TMM

Collection methods: bulk, quarrying, sieve,

• "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"

Primary reference: 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]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 16542: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Mark Uhen and Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• 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

unclassified
  -
Malacostraca
 Decapoda -
Decapoda indet.7 Latreille 1802 decapod
Ostracoda
  -
Ostracoda indet.7 Latreille 1802 ostracod
 Podocopida - Bythocyprididae
Bythocypris indet.7 Brady 1880 ostracod
Bivalvia
 Ostreida - Ostreidae
 Mytilida - Mytilidae
? Brachidontes sp.7 Swainson 1840 mussel
Gastropoda
 Naticoidea - Naticidae
Naticidae indet.7 Guilding 1834 moon snail
 Sorbeoconcha - Turritellidae
Turritella cortezi7 turret shell
Chondrichthyes
 Myliobatiformes - Dasyatidae
Dasyatis sp.5 Rafinesque 1810 whiptail stingray
 Myliobatiformes - Rhinopteridae
Rhinoptera sp.5 Cuvier 1829 cownose ray
 Myliobatiformes - Myliobatidae
Myliobatis sp.5 Cuvier 1816 eagle ray
 Rajiformes - Rhinobatidae
Rhinobatos sp.5 Link 1790 guitarfish
 Pristiformes - Pristidae
Pristis sp.5 Linck 1790 sawfish
Pristis sp.7 Linck 1790 sawfish
 Lamniformes - Odontaspididae
Striatolamia macrota5 Agassiz 1843 sand tiger shark
Striatolamia macrota7 Agassiz 1843 sand tiger shark
 Carchariniformes - Carcharhinidae
Galeocerdo eaglesomei5 White 1926 tiger shark
Galeocerdo eaglesomei7 White 1926 tiger shark
Carcharhinus sp.5 de Blainville 1816 requiem shark
[entered as Carcarhinus sp.]
Carcharhinus sp.7 de Blainville 1816 requiem shark
Actinopteri
 Elopiformes - Megalopidae
Megalopidae indet.5 Jordan 1923
 Elopiformes - Phyllodontidae
 Perciformes -
Diaphyodus wilsoni n. sp.5 perch-like fish
 Acanthomorphata - Sciaenidae
Jefitchia sp.5 Frizzell and Dante 1965
 Alepisauriformes - Dercetidae
Cylindracanthus sp.8 Leidy 1856
 Siluriformes - Ariidae
cf. Arius sp.5 Cuvier and Valenciennes 1840 Ariid catfish
 Lepisosteiformes - Lepisosteidae
Lepisosteus sp.5 Agassiz 1843 gar
Osteichthyes
 Salientia -
Reptilia
 Testudines - Trionychidae
Trionychidae indet.2 Gray 1825 softshell turtle
 Testudines - Kinosternoidea
Xenochelys sp.5 Hay 1906 mud turtle
cf. Baptemys sp.5 Leidy 1870 mud turtle
 Testudines - Carettochelyidae
cf. Allaeochelys sp.5 Noulet 1867 turtle
 Testudines - Pantestudinidae
Hadrianus sp.5 Cope 1872 turtle
 Testudines - Panemydidae
Emydidae indet.5 Rafinesque 1815 turtle
Aves
  -
Aves indet.5 Linnaeus 1758 bird
 Ornithurae -
Gruiformes indet.7 Bonaparte 1854 bird
Reptilia
 Crocodylia - Alligatoridae
Allognathosuchus sp.5 Mook 1921 crocodilian
Caimaninae indet.8 Brochu 1999 crocodilian
 Crocodylia - Planocraniidae
"Pristichampsus cf. vorax" = Boverisuchus vorax5
"Pristichampsus cf. vorax" = Boverisuchus vorax5 Troxell 1925 crocodilian
 Squamata - Anguidae
Glyptosaurinae indet.5 Marsh 1872 squamates
Glyptosaurinae indet.8 Marsh 1872 squamates
 Squamata - Palaeophidae
Pterosphenus schucherti5 Lucas 1898 squamates
Pterosphenus schucherti8 Lucas 1898 squamates
Mammalia
 Sirenia - Sirenia
 Primates - Microsyopidae
Microsyops sp. Leidy 1872 primate
 Primates - Omomyidae
Omomys cf. carteri11, "? Mytonius sp. n. sp." = Ourayia7, Macrotarsius cf. jepseni
Omomys cf. carteri11 Leidy 1869 tarsier
"? Mytonius sp. n. sp." = Ourayia7 Gazin 1958 tarsier
Macrotarsius cf. jepseni Robinson 1968 tarsier
 Primates -
Mahgarita cf. stevensi10 Wilson and Szalay 1976 primate
 Rodentia - Sciuravidae
Pauromys simplex n. sp.3 Walton 1993 rodent
 Rodentia - Laredomyidae
Laredomys riograndensis n. sp.12 Wilson and Westgate 1991 rodent
may include unidentified mammal, said to be new
 Rodentia -
cf. Nonomys sp.7 Emry and Dawson 1973 rodent
 Rodentia - Eutypomyidae
Microeutypomys karenae n. sp.4 Walton 1993 rodent
 Rodentia - Ischyromyidae
Ischyromyidae indet. Alston 1876 rodent
two forms
Microparamys sp. Wood 1959 rodent
not Laredomys
Thisbemys sp. Wood 1959 rodent
Mytonomys cf. robustus Peterson 1919 rodent
 Rodentia - Cylindrodontidae
Cylindrodontidae indet. Miller and Gidley 1918 rodent
said to be new
 Lipotyphla - Geolabididae
Centetodon pulcher Marsh 1872 placental
 Perissodactyla - Brontotheriidae
Notiotitanops mississippiensis9 Gazin and Sullivan 1942 brontothere
Notiotitanops mississippiensis9 Gazin and Sullivan 1942 brontothere
 Perissodactyla - Amynodontidae
Amynodon advenus Marsh 1875 odd-toed ungulate
also present at TMM 42185
 Perissodactyla - Hyracodontidae
? Triplopus sp.7 Cope 1880 odd-toed ungulate
 Perissodactyla - Equidae
Epihippus sp.10 Marsh 1878 horse
 Carnivora - Miacidae
cf. Miocyon sp.1 Matthew 1909 carnivoran
 Carnivora -
Procynodictis cf. vulpiceps Wortman and Matthew 1899 carnivoran
 Chiroptera -
Chiroptera indet.10 Blumenbach 1779 bat
 Ungulata - Hyopsodontidae
Hyopsodus cf. uintensis Osborn 1902 condylarth
 Ungulata - Leptochoeridae
Laredochoerus edwardsi n. gen. n. sp.7 Westgate 1994 even-toed ungulate
Laredochoerus edwardsi n. sp.6 Westgate 1994 even-toed ungulate
 Ungulata - Agriochoeridae
Protoreodon petersoni Gazin 1955 agriochoerid
Protoreodon parvus7 Scott and Osborn 1887 agriochoerid
 Ungulata - Protoceratidae
Toromeryx cf. marginensis Wilson 1974 protoceratid
Leptoreodon pusillus Golz 1976 protoceratid
Leptoreodon leptolophus Golz 1976 protoceratid
additional specimen from TMM 41871 described by Wilson 1984
 Acreodi -
cf. Simidectes magnus Peterson 1919 mesonychian
 Acreodi - Mesonychidae
cf. Harpagolestes uintensis9 Scott 1888 condylarth
Harpagolestes cf. uintensis9 Scott 1888 condylarth
 Theriiformes - Herpetotheriidae
Peratherium comstocki, "Herpetotherium marsupium" = Peratherium marsupium1
Peratherium comstocki Cope 1884 marsupial
"Herpetotherium marsupium" = Peratherium marsupium1 Troxell 1923 marsupial
Pteridopsida
 Polypodiales - Pteridaceae
Lycopsida
  - Selaginellaceae
Selaginella sp.7 Beauvois 1804
Magnoliopsida
 Malvales - Bombacaceae