MV 6902, Allen Quarry, Bear Gulch (Carboniferous of the United States)

Where: Fergus County, Montana (46.9° N, 109.0° W: paleocoordinates 5.4° N, 35.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Bear Gulch Member (Heath Formation), Arnsbergian (327.0 - 323.7 Ma)

• "Namurian E2b" (E2 = Arnsbergian)

• group of beds-level stratigraphic resolution

Environment/lithology: lagoonal or restricted shallow subtidal; lithified, concretionary limestone

• "shallow, marine tropical bay" (Lund 1985)
• "rhythmically alternating sets of microturbidite beds and laminar beds" (Grogan and Lund 1997)

Size class: macrofossils

Preservation: adpression, concretion, soft parts

Collected by Melton

Collection methods: mechanical,

• Material is at the University of Montana

Primary reference: R. Lund. 1982. Harpagofututor volsellorhinus new genus and species (Chondrichthyes, Chondrenchelyiformes) from the Namurian Bear Gulch Limestone, Chondrenchelys problematica Traquair (Visean), and their sexual dimorphism. Journal of Paleontology 56(4):938-958 [J. Alroy/J. Alroy/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 116657: authorized by Matthew Clapham, entered by Matthew Clapham on 10.09.2011, edited by Sophie Fasey and Joseph Flannery-Sutherland

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Coelacanthimorpha
 Coelacanthiformes - Rhabdodermatidae
Caridosuctor populosum5
Caridosuctor populosum5 Lund and Lund 1984 coelacanth
Gnathostomata
  -
Actinopterygii "larval actinop"5
Osteichthyes
  - Aesopichthyidae
Aesopichthys erinaceus6
Aesopichthys erinaceus6 Poplin and Lund 2000
MV 2774
 Palaeoniscoidea -
Acanthoniscus cracens1
Acanthoniscus cracens1 Lowney 1980
"tube snout"
 Phanerosteonoidei - Phanerosteonidae
Atrocauda lundae5
Atrocauda lundae5 Lowney 1980
"long pelvic"
 Fubarichthyiformes - Fubarichthyidae
Yogoniscus gulo2, Fubarichthys copiosus2
Yogoniscus gulo2 Lowney 1980
NMS 1982.21.1a, b (might not be this exact locality)
Fubarichthys copiosus2 Lowney 1980
NMS 1982.21.2a, b (unclear which exact outcrop locality this specimen is from)
 Palaeonisciformes - Rhadinichthyidae
Wendyichthys lautreci4, Wendyichthys dicksoni5, Cyranorhis bergeraci4
Wendyichthys lautreci4 Lund and Poplin 1997
Wendyichthys dicksoni5 Lund and Poplin 1997
Cyranorhis bergeraci4 Lund and Poplin 1997
Chondrichthyes
 Symmoriiformes - Falcatidae
Falcatus falcatus3
Falcatus falcatus3 St. John and Worthen 1883 elasmobranch
MV 3031
 Chondrenchelyiformes - Chondrenchelyidae
Harpagofututor volsellorhinus
Harpagofututor volsellorhinus Lund 1982 chimaera
MV 3208
1Liu and Tseng 1964; 2Lowney 1980; 3Lund 1985; 4Lund and Poplin 1997; 5Lund and Poplin 1999; 6Poplin and Lund 2000