Helmick Hill (Eocene of the United States)

Where: Oregon (44.8° N, 123.4° W: paleocoordinates 45.8° N, 110.0° W)

• coordinate estimated from map

When: Spencer Formation, Bartonian (41.3 - 38.0 Ma)

• age after Nesbitt (2018)

Environment/lithology: marine; sandstone

Size class: macrofossils

Primary reference: B. J. Welton. 1972. Fossil sharks in Oregon. The Ore Bin 34(10):161-170 [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 201281: authorized by Mark Uhen, entered by Mark Uhen on 03.05.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Squatiniformes - Squatinidae
Squatina sp. Dumeril 1806 angel shark
 Plagiostomi - Squalidae
Squalus sp. Linnaeus 1758 dogfish shark
 Myliobatiformes - Myliobatidae
Myliobatis sp. Cuvier 1816 eagle ray
 Lamniformes - Lamnidae
Isurus sp. Agassiz 1843 mako shark
 Lamniformes - Odontaspididae
Odontaspis macrota Agassiz 1843 sand tiger shark
 Heterodontiformes - Heterodontidae
Heterodontus sp. de Blainville 1816 bullhead shark