GSC C22185, Baillie-Hamilton Island (Silurian of Canada)

Also known as Brachiopods, Cape Phillips Formation,

Where: Northwest Territories, Canada (75.8° N, 94.5° W: paleocoordinates 3.5° N, 32.7° W)

• coordinate estimated from map

• local area-level geographic resolution

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

• According to author, material is from between the murchisoni and lundgreni zones. This would make it Sheinwoodian, although author simply refers to it as Wenlockian.

• formation-level stratigraphic resolution

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

• "...Formation...represents the slope-to-basinal facies equivalent of coeval platform carbonates that occur to S and E..."

•SEP environmental call based on given info and regional context

• "..Formation consists of shale and thin bedded, laminated siltstone and limestone...Section [with faunas] broadly divisible into two lithofacies: a lower part about 25 m thick, consists mainly of medium grey, thin bedded argillaceous Lst that is variably dolomitic...and an upper part, about 65 m thick, consisting mainly of very dark grey, very thin bedded argillaceous Lst that is markedly bituminous and commonly planar laminated...These beds appear to represent sediment gravity flows that were derived from platform carbonates...some 10 km to the east. The brachiopods and conodonts were obtained from the bioclastic beds and are therefore presumed to be allochthonous."

Preservation: replaced with silica

Reposited in the GSC

Primary reference: N. Zhang. 1989. Wenlockian (Silurian) brachiopods of the Cape Phillips Formation, Baillie Hamilton Island, Arctic Canada: part I. Palaeontographica Abteilung A 206(1-3):49-97 [M. Foote/M. Foote/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 26011: authorized by Michael Foote, entered by Michael Foote on 30.09.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• List in Part I of monograph (PBDB ref. 7205) covers all the brachiopods, whereas the systematic treatment is spread out through three parts (refs. 7205-7207).
Show authors, comments, and common names
unclassified
  -
Sprinella struszi
Strophomenata
 Orthotetida - Triplesiidae
Cliftonia contorta, Streptis glomerata
 Orthotetida - Chilidiopsidae
Morinorhynchus crispus
Morinorhynchus crispus Lindström 1861
 Strophomenida - Sowerbyellidae
"Paranisopleurella cooperi" = Eoplectodonta (Ygerodiscus)
"Paranisopleurella cooperi" = Eoplectodonta (Ygerodiscus)
 Strophomenida - Aegiromenidae
? Chonetoidea cocksi, "Aegiria grayi" = Jonesea grayi
"Aegiria grayi" = Jonesea grayi Davidson 1849
 Strophomenida - Leptaenoideidae
Liljevallia amorpha
 Strophomenida - Amphistrophiidae
Amphistrophia sp.
Amphistrophia sp. Hall and Clarke 1892
 Strophomenida - Rafinesquinidae
Leptaena "Form 2"
Leptaena "Form 2" Dalman 1828
Rhynchonellata
 Pentamerida - Gypidulidae
Amsdenina amsdeni, Caryogyps grayi, Caryogyps chattertoni
Caryogyps grayi Zhang 1989
 Pentamerida - Clorindidae
Clorinda sp.
Clorinda sp. Barrande 1879
 Pentamerida - Pentameridae
? Lissocoelina sp., ? Rhipidium sp.
? Lissocoelina sp. Schuchert and Cooper 1931
? Rhipidium sp. Schuchert and Cooper 1931
 Pentamerida - Subrianidae
Spondylopyxis potteri
 Spiriferida - Adolfiidae
Spurispirifer hughesi
 Athyridida - Meristidae
Merista sp.
Merista sp. Suess 1851
 Athyridida - Nucleospiridae
Nucleospira cf. raritas
 Atrypida - Punctatrypidae
Reticulatrypa blodgetti, Reticulatrypa variabilis
 Atrypida - Atrypinidae
Gracianella dimorpha, Spirigerina copperi
Spirigerina copperi Zhang 1989
 Atrypida - Lissatrypidae
Lissatrypa cf. atheroidea, "Johnsoniatrypa imbricata" = Aulacatrypa
"Johnsoniatrypa imbricata" = Aulacatrypa
 Atrypida - Atrypidae
Eospinatrypa bassetti, Eospinatrypa sagana, Plectatrypa rongi
Eospinatrypa sagana Boucot et al. 1988
 Protorthida - Skenidiidae
Skenidioides operosa
Skenidioides operosa Johnson et al. 1976
 Rhynchonellida - Trigonirhynchiidae
"Ancillotoechia" sheehani, Rhynchotreta americaniformis
 Rhynchonellida - Rhynchotrematidae
Stegerhynchus angaciensis, Stegerhynchus estonicus
 Orthida - Dicoelosiidae
Epitomyonia amplissima, Dicoelosia bailliehamiltonensis
 Orthida - Rhipidomellidae
Dalejina parahanusi, Pseudomendacella boucoti
 Orthida - Dalmanellidae
Resserella canalis, Isorthis jini, Isorthis walmsleyi, Isorthis sulcata
Resserella canalis Sowerby 1839
 Orthida - Hesperorthidae
Flabellitesia kessei
Flabellitesia kessei Boucot et al. 1988
 Orthida - Wangyuiidae
Wangyuia thorsteinssoni