Trilobite-Ostracode Fauna, Cape Phillips Fm. GSC C-22187, Baillie-Hamilton Is. (Silurian of Canada)

Where: Nunavut, Canada (75.8° N, 94.5° W: paleocoordinates 1.9° N, 30.6° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Cape Phillips Formation, Gorstian (427.4 - 425.6 Ma)

• Parts of section yielding trilobites are from about 97.5 ft. to 245 ft. above base, spanning early Wenlockian Cyrtograptus canadenses through penultimate Wenlockian Monograptus testis zones.

• bed-level stratigraphic resolution

Environment/lithology: slope; shelly/skeletal limestone and calcareous shale

• SEP environmental call based on given info and regional context
• "alternating fine grained, argillaceous limestones and lesser amounts of interbedded calcareous shale and biogenic limestone" Column shows the last two named lithologies to be most relevant to these collections.

Reposited in the GSC

Primary reference: D. G. Perry and B. D. E. Chatterton. 1977. Silurian (Wenlockian) trilobites from Baillie-Hamilton Island, Canadian Arctic Archipelago. Canadian Journal of Earth Sciences 14:285-317 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 26008: authorized by Michael Foote, entered by Michael Foote on 30.09.2002, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Ostracoda
 Leperditicopida - Leperditiidae
Leperditia arctica, "Leperditia" hisingeri
Trilobita
 Phacopida - Encrinuridae
Encrinurus (Fragiscutum) sp.
Encrinurus (Fragiscutum) sp. Emmrich 1844 trilobite
 Phacopida - Cheiruridae
Sphaerexochus dimorphus n. sp., Youngia "sp. 1", Youngia "sp. 2"
Sphaerexochus dimorphus n. sp. Whittington and Evitt 1953 trilobite
Youngia "sp. 1" Lindström 1885 trilobite
Youngia "sp. 2" Lindström 1885 trilobite
 Phacopida - Calymenidae
Calymene sp.
Calymene sp. Brongniart 1822 trilobite
 Proetida - Otarionidae
Otarion sp.
Otarion sp. Zenker 1833 trilobite
 Proetida - Proetidae
sensu lato Proetus sp., "sensu lato Proetus cf. granulatus" = Gerastos granulatus
sensu lato Proetus sp. Steininger 1831 trilobite
"sensu lato Proetus cf. granulatus" = Gerastos granulatus Lindström 1885 trilobite
 Lichida - Lichidae
Borealarges mikulicorum1
Borealarges mikulicorum1 Perry and Chatterton 1977 trilobite
 Corynexochida - Illaenidae
Illaenidae indet.
Illaenidae indet. Hawle and Corda 1847 trilobite
 Odontopleurida - Odontopleuridae
? Odontopleuridae indet., ? Leonaspis sp.
? Odontopleuridae indet. Burmeister 1843 trilobite
New genus odontopleurid?
? Leonaspis sp. Richter and Richter 1917 trilobite
Gastropoda
 Euomphalina - Holopeidae
"Lytospira cf. gotlandicus" = Pachystrophia gotlandicus3
"Lytospira cf. gotlandicus" = Pachystrophia gotlandicus3 Lindström 1884 snail
 Euomphalina - Oriostomatidae
? Oriostoma sp.4
? Oriostoma sp.4 Munier-Chalmas 1876 snail
 Euomphalina - Platyceratidae
"Platyceras (Platyceras) cornutum" = Platyostoma cornutum3, "Platyceras (Platyostoma) boggsi" = Platyostoma boggsi3
"Platyceras (Platyceras) cornutum" = Platyostoma cornutum3 Hisinger 1837 snail
ssp. loricatum
"Platyceras (Platyostoma) boggsi" = Platyostoma boggsi3 Rohr et al. 1981 snail
 Murchisoniina - Murchisoniidae
Murchisonia aff. obtusangula4
Murchisonia aff. obtusangula4 Lindström 1884 snail
 Murchisoniina - Gosseletinidae
Promourlonia aff. furcata4
Promourlonia aff. furcata4 Longstaff 1924 snail
Tergomya
 Tryblidiida - Tryblidiidae
Tryblidium thorsteinssoni n. sp.2
Tryblidium thorsteinssoni n. sp.2 Boucot 1975
1Adrain and Ramskold 1996; 2Boucot 1975; 3Rohr et al. 1981; 4Wagner 2023