Baylor County (Seymour): Cisuralian, Texas
collected by Jacob Boll 1880

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Chondrichthyes - Hybodontiformes - Hybodontidae
"Hybodus" regularis n. sp. Cope 1891
replaced by Hybodus copei
Chondrichthyes - Xenacanthida - Orthacanthidae
Didymodus compressus (Newberry 1856)
Cope 1884 12 specimens
recombined as Orthacanthus compressus
Didymodus platypternus (Cope 1884)
Cope 1884
original and current combination Orthacanthus platypternus
see common names

Geography
Country:United States State/province:Texas
Coordinates: 33.6° North, 99.3° West (view map)
Paleocoordinates:0.2° South, 30.0° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Permian Epoch:Cisuralian
Key time interval:Cisuralian
Age range of interval:298.90000 - 272.30000 m.y. ago
Stratigraphy
Stratigraphic resolution:group of beds
Stratigraphy comments: According to Romer (1942), the specimen cannot be Triassic because (1) there are no Triassic beds within 100 miles of Seymour, (2) no limestone strata are recorded in the Texas Triassic, (3) Boll never worked in Triassic regions, and (4) fossiliferous Triassic beds were not discovered until years after Boll's death.
Lithology and environment
Primary lithology: lithified "limestone"
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Museum repositories:AMNH
Collectors:Jacob Boll Collection dates:1880
Metadata
Database number:132969
Authorizer:M. Clapham Enterer:P. Vazquez
Modifier:P. Vazquez Research group:vertebrate
Created:2012-08-30 08:49:38 Last modified:2013-11-25 13:02:06
Access level:the public Released:2012-08-30 08:49:38
Creative Commons license:CC BY
Reference information

Primary reference:

47800. E. D. Cope. 1891. On the characters of some Paleozoic fishes. Proceedings of the United States National Museum 14:447-463 [M. Clapham/M. Clapham/M. Clapham]

Secondary references:

47909 E. D. Cope. 1884. On the structure of the skull in the Elasmobranch genus Didymodus. Proceedings of the American Philosophical Society 21:572-590 [M. Clapham/P. Vazquez]