SBMNH Berry Loc. 1 (Oligocene to of the United States)

Where: Meagher County, Montana (46.6° N, 111.1° W: paleocoordinates 47.6° N, 106.2° W)

• coordinate stated in text

When: Deep River Formation, Late/Upper Oligocene to Late/Upper Oligocene (28.4 - 16.0 Ma)

Environment/lithology: terrestrial; tuff

• environment interpreted as mesic, temperate climate with woodland having similar climate requirements as modern mixed mesophytic. Precipitation no less than 75cm.
• altered, tan, lime-cemented, clayey, vitric crystal tuff containing numerous glass shards of up to 0.5 mm diameter.

Size class: macrofossils

Collected by S. S. Berry

Primary reference: B. Roth and K. C. Emberton. 1994. "Extralimital" Land Mollusks (Gastropoda) from the Deep River Formation, Montana: Evidence for Mesic Medial Tertiary Climate. Proceedings of the Academy of Natural Sciences of Philadelphia 145:93-106 [P. Holroyd/P. Holroyd]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 200342: authorized by Patricia Holroyd, entered by Patricia Holroyd on 29.03.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

• specimens held at Santa Barbara Museum of Natural History
Show authors, comments, and common names
unclassified
  -
Gastrocopia aff. armifera
Gastropoda
 Cycloneritida - Helicinidae
Hendersonia stillmani n. sp.
Hendersonia stillmani n. sp. Roth and Emberton 1994 snail
 Stylommatophora - Succineidae
Succineidae indet.
Succineidae indet. Beck 1837 amber snail
 Stylommatophora - Polygyridae
Triodopsis sp., Euchemotrema occidaneum n. sp.
Triodopsis sp. Rafinesque 1819 slug
Euchemotrema occidaneum n. sp. Roth and Emberton 1994 slug
 Stylommatophora - Oreohelicidae
Oreohelix aff. strigosa, ? Radiocentrum sp.
Oreohelix aff. strigosa mountain snail
subspecies berryi
? Radiocentrum sp. Pilsbry 1905 slug
 Stylommatophora - Pupillidae
Pupillidae indet., Pupoides montana
Pupillidae indet. Turton 1831 slug
2-3 species
 Stylommatophora - Valloniidae
Vallonia aff. perspectiva
 Pulmonata - Discidae
Discus aff. patulus