GSC loc. C-3217. Lowther Island (Devonian of Canada)

Where: Nunavut, Canada (74.6° N, 97.6° W: paleocoordinates 7.9° S, 22.5° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Polygnathus inversus conodont zone, Middle Member (Disappointment Bay Formation), Late/Upper Emsian (402.5 - 391.9 Ma)

• Three collections, C2681, C2682, and C3217, are in increasing stratigraphic order, the first from the lowest of three members, the second two from the middle member. C3217 seen as correlative with Elythyna beds of Nevada and conodont zone 9 of Klapper et al. 1971.

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; dolomite

• SEP environmental call based on given info
• Formation as a whole: "basal conglomerate, fine grained sandstone, and predominantly limestone and dolomite." "The lower member is a dark limestone 125 feet thick...The middle member is 325 feet thick and consists of a light-colored dolomite including reef knolls developed at its base...The upper member consists of anhydrite, sandstone, siltstone, and dolomite and has not yielded fossils."

Size classes: macrofossils, mesofossils

Reposited in the GSC

Primary reference: J. G. Johnson. 1975. Late Early Devonian brachiopods from the Disappointment Bay Formation, Lowther Island, Arctic Canada. Journal of Paleontology 49(6):947-978 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 26625: authorized by Michael Foote, entered by Michael Foote on 18.10.2002, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

• Focus here is on brachiopods. Some other elements mentioned in passing.
Gastropoda
  -
Gastropoda indet. Cuvier 1795 snail
 Murchisoniina - Gosseletinidae
"Angyomphalus (Eoangyomphalus) arctica n. sp." = Eoangyomphalus arctica
"Angyomphalus (Eoangyomphalus) arctica n. sp." = Eoangyomphalus arctica Blodgett and Johnson 1992 snail
 Bellerophontida -
"Bellerophontacea indet." = Bellerophontoidea
"Bellerophontacea indet." = Bellerophontoidea M'Coy 1851 snail
Bivalvia
  -
"Pelecypoda indet." = Bivalvia
"Pelecypoda indet." = Bivalvia Linnaeus 1758 clam
 Lophophorata -
Tentaculitida indet. Ljaschenko 1955
Strophomenata
 Orthotetida - Schuchertellidae
"Schuchertella" sp. Girty 1904
"S."? sp.
 Strophomenida - Stropheodontidae
 Strophomenida - Chonetidae
"Chonetes" "sp. A" Fischer de Waldheim 1830
"Chonetes" "sp. B" Fischer de Waldheim 1830
"Chonetes" "sp. C" Fischer de Waldheim 1830
Rhynchonellata
 Rhynchonellida - Trigonirhynchiidae
 Rhynchonellida - Hebetoechiidae
 Orthida - Schizophoriidae
Schizophoria sp. King 1850
 Atrypida - Atrypidae
Atrypa "sp. C" Dalman 1828
 Pentamerida - Gypidulidae
? Gypidula sp. Hall 1867
 Spiriferida - Ambocoeliidae
Crurithyris sp. George 1931
 Spiriferida - Elythynidae
 Athyridida - Anoplothecidae
 Athyridida - Athyrididae
Hyolitha
  -
Hyolitha indet. Marek 1963
Tentaculita
 Styliolinida - Styliolinidae
Styliolina sp. Karpinsky 1884
Deuteropoda
  -
Ostracoda indet. Latreille 1802 ostracod
Conodonta
 Ozarkodinida - Polygnathidae