Where: Fergus County, Montana (46.9° N, 109.0° W: paleocoordinates 5.4° N, 35.1° W)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Bear Gulch Member (Heath Formation), Arnsbergian (326.4 - 318.1 Ma)
• "Namurian E2b" (E2 = Arnsbergian)
• member-level stratigraphic resolution
Environment/lithology: open shallow subtidal; lithified, concretionary limestone
Size class: macrofossils
Preservation: adpression, concretion, soft parts
Collected by J. Lund, W. G. Melton, J. R. Horner, D. Melton, B. Snyder; reposited in the CM
Collection methods: mechanical, peel or thin section,
• material is prepared by taking thin sections
Primary reference: W. G. Melton. 1969. A new dorypterid fish from central Montana. Northwest Science 43:196-206 [M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 90681: authorized by John Alroy, entered by John Alroy on 12.08.2009, edited by Loic Villier and Matthew Clapham
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
"Metazoa indet." = Animalia11
| |
Archisymplectes rhothon | |
| |
Polychaeta | |
| |
| |
Xiphosura | |
"Paleolimulus longispinus" = Boeotiaspis longispinus15
"Paleolimulus longispinus" = Boeotiaspis longispinus15 Schram 1979 CM 33946, 33947, 33983-33985, 33994-34000
| |
"? Euproopidae indet." = Belinuridae15
"? Euproopidae indet." = Belinuridae15 Zittel and Eastman 1913 CM 33986, 33987 ("may also be euproopids")
| |
Asteroidea | |
Lepidasterella montanensis n. sp.17
| |
Chondrichthyes | |
| |
Falcatus falcatus4 St. John and Worthen 1883 elasmobranch some material earlier attributed to Physonemus
Damocles serratus n. gen. n. sp.5 Lund 1986 elasmobranch includes material earlier compared to Physonemus attenuatus
| |
| |
Squatinactis caudispinatus n. gen. n. sp.6
| |
Harpagofututor volsellorhinus n. gen. n. sp.3
| |
Debeerius ellefseni n. gen. n. sp.1
| |
| |
Petalorhynchus beargulchensis n. sp.7
| |
Coelacanthimorpha | |
Caridosuctor populosum n. gen. n. sp.8
| |
Lochmocercus aciculiodontus n. gen. n. sp.8
| |
| |
Osteichthyes | |
Lineagruan snowyi n. sp.12 Mickle et al. 2009
Lineagruan judithi n. gen. n. sp.12 Mickle et al. 2009 | |
Proceramala montanensis n. gen. n. sp.13 Poplin and Lund 2000
Aesopichthys erinaceus n. gen. n. sp.13 Poplin and Lund 2000 | |
Kalops monophrys n. sp.14 Poplin and Lund 2002
Beagiascus pulcherrimus n. gen. n. sp.12 Mickle et al. 2009 | |
Actinopteri | |
Paratarrasius hibbardi n. gen.9
Paratarrasius hibbardi n. gen.9 Lund and Melton 1982 | |
Osteichthyes | |
Wendyichthys dicksoni n. gen.10 Lund and Poplin 1997
Cyranorhis bergeraci n. gen. n. sp.10 Lund and Poplin 1997 |