BH-1-164.5, Baillie-Hamilton Is (Silurian of Canada)

Also known as BH-1-540; BHL1-164.5

Where: Nunavut, Canada (74.1° N, 94.0° W: paleocoordinates 3.8° N, 35.3° W)

When: Monograptus riccartonensis graptolite zone, Cape Phillips Formation, Sheinwoodian (433.4 - 430.5 Ma)

• Sometimes given as BHL; perneri-opimus zone

• bed-level stratigraphic resolution

Environment/lithology: slope; calcareous carbonate and shale

• "A series of carbonate debris flows [into basinal shales] derived from the platform margin is preserved in this area. It is from these gravity flow deposits that silicified fossils have been recovered."

Size classes: macrofossils, mesofossils

Preservation: replaced with silica

Primary reference: J. M. Adrain and L. Ramskold. 1997. Silurian Odontopleurinae (Trilobita) from the Cape Phillips Formation, Arctic Canada. Journal of Paleontology 71(2):237-261 [J. Alroy/M. Sommers/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 690: authorized by John Alroy, entered by Mike Sommers on 23.02.1999, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

• Odontopleurinae trilobites only; article implies there is a graptolite fauna as well.
Show authors, comments, and common names
Gastropoda
 Bellerophontida - Bucaniidae
Salpingostoma aff. martinssoni3
 Euomphalina - Euomphalidae
Euomphalopterus (Euomphalopterus) alatus2
 Euomphalina - Holopeidae
"Lytospira cf. gotlandicus" = Pachystrophia gotlandicus2
"Lytospira cf. gotlandicus" = Pachystrophia gotlandicus2 Lindström 1884 snail
 Euomphalina - Platyceratidae
"Platyceras (Platyostoma) boggsi" = Platyostoma boggsi2
"Platyceras (Platyostoma) boggsi" = Platyostoma boggsi2 Rohr et al. 1981 snail
 Euomphalina - Oriostomatidae
? Oriostoma sp.3
? Oriostoma sp.3 Munier-Chalmas 1876 snail
 Murchisoniina - Murchisoniidae
Murchisonia cf. obtusangula3
Murchisonia cf. obtusangula3 Lindström 1884 snail
 Murchisoniina - Gosseletinidae
Promourlonia cf. furcata3
Promourlonia cf. furcata3 Longstaff 1924 snail
Trilobita
 Odontopleurida - Odontopleuridae
Radiaspis "sp. 1", Kettneraspis wrightae n. sp., Edgecombeaspis johansonae n. sp.
Radiaspis "sp. 1" Richter and Richter 1917 trilobite
Kettneraspis wrightae n. sp. Adrain and Ramskold 1997 trilobite
Edgecombeaspis johansonae n. sp. trilobite
 Phacopida - Encrinuridae
sensu lato Struszia petebesti n. sp.1
sensu lato Struszia petebesti n. sp.1 Adrain and Edgecombe 1997 trilobite
1Adrain and Edgecombe 1997; 2Rohr et al. 1981; 3Wagner 2023