Severn Formation Locality B (Landover) (Cretaceous of the United States)

Also known as McCormick, Inglewood

Where: Prince George's County, Maryland (38.9° N, 76.8° W: paleocoordinates 39.8° N, 52.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Severn Formation, Maastrichtian (72.1 - 66.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithology not reported

• none given

Size classes: macrofossils, mesofossils

Collected by D. J. Bohaska, L. Decina, G. C. Fonger, E. F. Hartstein, P. M. Kranz, & E. M. Lauginiger; reposited in the USNM

Primary reference: D. Baird. 1986. Upper Cretaceous reptiles from the Severn Formation of Maryland. The Mosasaur 3:63-85 [J. Alroy/M. Sommers]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 27563: authorized by John Alroy, entered by John Alroy on 11.12.2002, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudines - Toxochelyidae
Toxochelyidae indet. Baur 1895 sea turtle
USNM 336471; "possibly Peritresius"
 Testudines - Macrobaenidae
Osteopygis emarginatus Cope 1868 turtle
USNM 336472
 Testudines - Pantrionychidae
cf. Trionyx priscus Cope 1869 turtle
USNM 387367, 336475
 Testudines - Pancheloniidae
Peritresius ornatus Leidy 1856 turtle
USNM 336479, 336470, 336474
 Crocodylia -
Thoracosaurus neocesariensis De Kay 1842 crocodilian
USNM 336478, 387368; Foniger coll.
 Squamata - Mosasauridae
Mosasauridae indet. Gervais 1852 mosasaur
USNM 336473; Lauginiger coll.
"Mosasaurus maximus" = Mosasaurus hoffmanni Mantell 1829 mosasaur
Hartstein coll., tooth
cf. Mosasaurus conodon Cope 1881 mosasaur
USNM 336480, 336473
Prognathodon rapax Hay 1902 mosasaur
USNM 336477
Halisaurus platyspondylus Marsh 1869 mosasaur
USNM 336476
 Sauropterygia - Elasmosauridae
cf. Cimoliasaurus magnus Leidy 1851 elasmosaur
Decina coll, cast PU 23625