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 - 39.7 Ma)
• Uinta C
Environment/lithology: estuary or bay; sandstone
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
•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 | |
Polypodiopsida | |
Lycopodiopsida | |
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Angiospermae | |
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Actinopteri | |
Jefitchia sp.6 Frizzell and Dante 1965 | |
Diaphyodus wilsoni n. sp.6
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Cylindracanthus sp.9 Leidy 1856 | |
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cf. Paralbula marylandica6 Blake 1940 | |
Megalopidae indet.6 Jordan 1923 | |
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Amphibia | |
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Reptilia | |
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"Pristichampsus cf. vorax" = Boverisuchus vorax6
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Aves | |
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Reptilia | |
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Mammalia | |
Peratherium comstocki Cope 1884 marsupial | |
Hyopsodus cf. uintensis Osborn 1902 condylarth | |
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Procynodictis cf. vulpiceps Wortman and Matthew 1899 placental | |
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cf. Simidectes magnus Peterson 1919 mesonychian | |
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Protoreodon petersoni Gazin 1955 agriochoerid | |
Toromeryx cf. marginensis Wilson 1974 protoceratid
Leptoreodon leptolophus Golz 1976 protoceratid additional specimen from TMM 41871 described by Wilson 1984
Leptoreodon pusillus Golz 1976 protoceratid | |
Centetodon pulcher Marsh 1872 placental | |
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Laredomys riograndensis n. sp.13
Laredomys riograndensis n. sp.13 Wilson and Westgate 1991 rodent may include unidentified mammal, said to be new
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Pauromys simplex n. sp.4
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Thisbemys sp. Wood 1959 rodent
Mytonomys cf. robustus Peterson 1919 rodent | |
Microeutypomys karenae n. sp.5
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Macrotarsius cf. jepseni Robinson 1968 tarsier | |
Microsyops sp. Leidy 1872 primate | |
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Sirenia indet. sirenian | |
Chondrichthyes | |
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Bivalvia | |
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Gastropoda | |
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Deuteropoda | |
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Ostracoda | |
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Malacostraca | |
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