Snowshoe Formation, Oregon, USA (Locality513) (Jurassic of the United States)

Where: Oregon (44.0° N, 119.5° W: paleocoordinates 34.8° N, 59.8° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Snowshoe Formation, Bajocian (170.3 - 168.3 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; gray mudstone and gray lime mudstone

• dark gray mudstones with common limestone nodules. sample from limestone nodules

Size class: microfossils

Primary reference: E. A. Pessagno, Jr. and C.D. Blome. 1980. Upper Triassic and Jurassic Pantanelliinae from California, Oregon, and British Columbia. Micropaleontology 26(3):225-273 [A. Miller/K. Layou/D. Schramm]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 32746: authorized by Arnold Miller, entered by Karen Layou on 14.07.2003, edited by Adam Kocsis

Creative Commons license: CC BY (attribution)

Taxonomic list

• Abundance data given as rare (1-2 specimens); common (3-5 specimens); and abudant (6+ specimens). Data recorded as 1, 3, 6 specimens for rare, common, and abundant, respectively.
Protozoa
 Nassellaria - Archaeodictyomitridae
Archaeodictyomitra "sp. A"2 Pessagno 1977 radiolarian
 Nassellaria - Hsuidae
Hsuum parasolense2 Pessagno and Whalen 1982 radiolarian
Hsuum robustum2 Pessagno and Whalen 1982 radiolarian
 Actinommacea - Xiphostylidae
Archaeocenosphaera spp.1 Pessagno et al. 1989 radiolarian
OR-513C
Triactoma spp.1 RĂ¼st 1885 radiolarian
OR-513C
Tripocyclia spp.1 Haeckel 1881 radiolarian
OR-513C
Xiphostylus superbus1 radiolarian
OR-513C
 Spumellaria - Pantanelliidae
Pantanellium baileyi n. sp. radiolarian
Pantanellium malheurense n. sp. radiolarian
Pantanellium vigrassi n. sp. radiolarian
Pantanellium sp. Pessagno 1977 radiolarian
Pantanellium sincerum n. sp. Pessagno and Blome 1980 radiolarian
Trillus seidersi n. sp. radiolarian
Zartus imlayi radiolarian
 Spumellaria - Parvivaccidae
Lanubus spp.1 Pessagno and Yang 1989 radiolarian
OR-513C