Beartooth Butte 2 (Devonian of the United States)

Where: Park County County, Wyoming (45.0° N, 109.6° W: paleocoordinates 28.2° S, 47.1° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Beartooth Butte Formation, Emsian (407.6 - 393.3 Ma)

• age based on dispersed spore data (McGregor, personal communication to Tanner).

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithified, gray, calcareous mudstone and lithified, calcareous shale

• It is a lenticular, channel-fill deposit which is some 2500 feet wide and 250 feet thick at maximum. Most collections from talus slope.
• Deposit contains basal limestone conglomerate overlain by evenly bedded red or gray limestones (more accurately, limy mudstones) and calcareous shales.

Size classes: macrofossils, microfossils

Preservation: mold/impression, adpression, permineralized, replaced with pyrite

Collection methods: quarrying, surface (float), surface (in situ), chemical, mechanical, peel or thin section,

• most plant fossils seem to come from Dorf's lithological sequence C; however, fossils collected for this study are from talus.

Primary reference: W. R. Tanner. 1984. A Fossil Flora from the Beartooth Butte Formation of Northern Wyoming. [P. Gensel/P. Gensel/P. Gensel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 26176: authorized by Pat Gensel, entered by Pat Gensel on 07.10.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
"Trimerophyte" indet.
= (?) Psilophyton of Dorf, single sporangium
Sawdonia wyomingense n. sp.
may = Dorf's Psilophyton wyomingense
Sphondylophyton hyenioides
affinity unknown
"Morphotype I" indet.
= Psilophyton wyomingense of Dorf - sterile axes only, preclude designating as Psilophyton
"Morphotype II" indet.
sterile, ribbon-like axes
Lingulata
 Lingulida - Elkaniidae
? Broeggeria strobiliformis
possibly an animal
Pteraspidomorpha
  - Cardipeltidae
Cardipeltis wallacii Branson and Mehl 1931
vertebrate
 Cyathaspidiformes - Pteraspididae
Protaspis sculpta Bryant 1933
fish
Protaspis ovata Bryant 1932
fish
Oreaspis williamsi Denison 1970
fish
Oreaspis dunklei Denison 1970
fish
Oreaspis ampla Bryant 1933
fish
Pteraspidomorphi
 Pteraspidomorphes -
Chondrichthyes
 Acanthodei - Acanthoessidae
Machaeracanthus minor shark
vertebrate
 Polyspondyli - Onchidae
Onchus peracutus shark
vertebrate
Onchus penetrans Bryant 1932 shark
vertebrate
Osteichthyes
 Arthrodira - Actinolepidae
Anarthraspis chamberlini armour-plated fish
fish
Anarthraspis montanus armour-plated fish
fish
Bryantolepis brachycephalus armour-plated fish
vertebrate
Bryantolepis cristatus armour-plated fish
vertebrate
Bryantolepis major armour-plated fish
vertebrate
Bryantolepis obscurus armour-plated fish
vertebrate
 Ptyctodontida - Ptyctodontidae
Bulbocanthus rugosus Bryant 1932 armour-plated fish
vertebrate
 Dipnoi - Uranolophidae
Uranolophus wyomingense lungfish
vertebrate
Rhyniopsida
  - Cooksoniaceae
Renalia dorfii n. sp.
also similar to Hsua Li
Drepanophycus
  -
Drepanophycus devonicus
fragments tentatively identified as
Psilophytopsida
 Psilophytales -
Distichophytum ovatum
= Bucheria Dorf and Rebuchia Hueber
Pteridopsida
  -
Apiculatisporis microconus
spore, Richardson
 Life -
Dibolisporites abitibiensis
spore, McGregor & Camfield
cf. Dibolisporites eifeliensis
spore, (Lanninger) McGregor
Retusotriletes
  -
Retusotriletes actinomorphus
spore, Chibrikova
Retusotriletes dubiosus
spore, McGregor
Retusotriletes indet. Naumova 1953
spore
Retusotriletes simplex
  -
Retusotriletes simplex Naumova 1953
spore, Naumova
Chomotriletes
  -
Chomotriletes indet. Naumova 1953
spore
Apiculiretusispora
  -
Apiculiretusispora plicata
spore, (Allen) Streel
Apiculiretusispora ? plicata
spore, (Allen) Streel
Apiculiretusispora indet. Streel 1964
spore
Grandispora
  -
Grandispora ? biornata
spore, (Lanninger) McGregor
Grandispora douglastownense
spore, (McGregor)
Grandispora ? macrotuberculata
spore, (Arkhangelskaya) McGregor
Grandispora micronata
spore, Tiwari & Schaarschmidt
Cornuata
 Cephalaspidiens - Cephalaspidae