MV 7632, Blacktail Pillar, Bear Gulch (Carboniferous of the United States)

Where: Fergus County, Montana (47.0° N, 108.9° W: paleocoordinates 5.4° N, 35.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Bear Gulch Member (Heath Formation), Arnsbergian (326.4 - 318.1 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, Lund

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 116659: authorized by Matthew Clapham, entered by Matthew Clapham on 10.09.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

 Symmoriiformes - Falcatidae
Falcatus falcatus1 St. John and Worthen 1883 elasmobranch
MV 6156
 Chondrenchelyiformes - Chondrenchelyidae
Harpagofututor volsellorhinus Lund 1982 chimaera
MV 6188, 6189
 Palaeonisciformes - Rhadinichthyidae
Wendyichthys dicksoni n. gen.2 Lund and Poplin 1997
MV 6117-8, 6146, 8602, 8604, 8608-10
  - Aesopichthyidae
Aesopichthys erinaceus3 Poplin and Lund 2000
MV 7790