PBDB Collection

GSC C12272, Baillie-Hamilton Island (Silurian of Canada)

Where: Nunavut, 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)

• Rohr et al.: "All of the localities are from the Monograptus riccartonensis Graptolite Zone within the Cape Phillips Formation..."

•

•Zhang: 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.

• bed-level stratigraphic resolution

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

• Rohr et al.: "The nature of the faunas...is consistent with their having been derived by downslope transport and extensive disarticulation from the outer BA 3 region through BA 5."

•SEP environmental call based on given info and regional context.

•

•Zhang: "...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

• Rohr et al.: "alternating fine-grained argillaceous limestones and lesser amounts of interbedded calcareous shale and biogenic limestone...The shelly fossils from the lower Wenlockian beds...occur in thin shelly limestones interlayered with graptolitic shales and mudstones."

•

•Zhang: "..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

Collection methods: bulk, hydrochloric

• Combined localities GSC C12272, C22184, C22187, and Perry localities BH-1-348,358,362,368,520, and 540.

•Wagner broke this up into individual localities.

Primary reference: D. M. Rohr, A.J. Boucot, and D.G. Perry. 1981. Silurian (Wenlockian) gastropods from Baillie-Hamilton Island, Canadian Arctic. Journal of Paleontology 55(2):331-339 [M. Foote/M. Foote/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 26009: authorized by Michael Foote, entered by Michael Foote on 30.09.2002, edited by Pete Wagner

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). Trilobites given in Perry & Chatterton 1977.

Show authors, comments, and common names

unclassified
-	Fascizentina rohri³ Fascizentina rohri³
Ostracoda
Palaeocopida -	Severella arctosulcata³ Severella arctosulcata³ Zhang 1989 ostracod
Gastropoda
Euomphalina - Anomphalidae	Pycnomphalus cf. obesus Pycnomphalus cf. obesus Lindström 1884 snail
Euomphalina - Euomphalidae	Poleumita sp. Poleumita sp. Clarke and Ruedemann 1903 snail
Euomphalina - Oriostomatidae	"? Oriostoma clarki" = Hecetastoma clarki, ? Oriostoma sp.² "? Oriostoma clarki" = Hecetastoma clarki Rohr et al. 1981 snail ? Oriostoma sp.² Munier-Chalmas 1876 snail BH-1-540 (5);
Euomphalina - Platyceratidae	"Platyceras (Platyostoma) boggsi" = Platyostoma boggsi "Platyceras (Platyostoma) boggsi" = Platyostoma boggsi Rohr et al. 1981 snail BH-1-348 (8); BH-1-358 (22); BH-1-362 (20); BH-1-368 (6); BH-1-540 (2);
Cyrtoneritida - Orthonychiidae	"Platyceras (Orthonychia) baldwini" = Orthonychia baldwini "Platyceras (Orthonychia) baldwini" = Orthonychia baldwini Rohr et al. 1981 snail
Murchisoniina - Trochonematidae	"Trochonema (Eunema) kaysi" = Globonema kaysi "Trochonema (Eunema) kaysi" = Globonema kaysi Rohr et al. 1981 snail
Murchisoniina - Murchisoniidae	Murchisonia aff. obtusangula² Murchisonia aff. obtusangula² Lindström 1884 snail BH-1-358 (22); BH-1-540 (43);
Rhynchonellata
Athyridida - Nucleospiridae	Nucleospira cf. raritas³ Nucleospira cf. raritas³
Athyridida - Athyrididae	Athyrididae indet.³, ? Pseudoprotathyris modzalevskayae³ Athyrididae indet.³ McCoy 1841 ? Pseudoprotathyris modzalevskayae³
Athyridida - Meristidae	Merista sp.³ Merista sp.³ Suess 1851
Protorthida - Skenidiidae	Skenidioides operosa³ Skenidioides operosa³ Johnson et al. 1976
Spiriferida - Cyrtiidae	Janius occidentalis³, Hedeina sp.³, Plicocyrtia jonesi³, Cyrtia alatiformis³ Janius occidentalis³ Boucot et al. 1988 Hedeina sp.³ Boucot 1957 Plicocyrtia jonesi³ Cyrtia alatiformis³ Zhang 1989
Spiriferida - Ambocoeliidae	Plicoplasia cf. acutiplicata³ Plicoplasia cf. acutiplicata³
Spiriferida - Adolfiidae	Spurispirifer hughesi³ Spurispirifer hughesi³
Spiriferida - Reticulariidae	Spirinella struszi³ Spirinella struszi³ Zhang 1989
Spiriferida - Delthyrididae	Howellella sp.³ Howellella sp.³ Kozlowski 1946
Orthida - Hesperorthidae	Flabellitesia kessei³, Ptychopleurella lenzi³ Flabellitesia kessei³ Boucot et al. 1988 Ptychopleurella lenzi³ Zhang 1989
Orthida - Wangyuiidae	Wangyuia thorsteinssoni³ Wangyuia thorsteinssoni³ Zhang 1989
Orthida - Rhipidomellidae	Pseudomendacella boucoti³, Dalejina parahanusi³ Pseudomendacella boucoti³ Dalejina parahanusi³
Orthida - Dicoelosiidae	Epitomyonia clausula³, Epitomyonia amplissima³, Dicoelosia bailliehamiltonensis³ Epitomyonia clausula³ Johnson et al. 1976 Epitomyonia amplissima³ Zhang 1989 Dicoelosia bailliehamiltonensis³
Orthida - Dalmanellidae	Visbyella visbyensis³, Parmorthina havliceki³, Resserella canalis³, Isorthis sulcata³, Isorthis walmsleyi³, Isorthis jini³ Visbyella visbyensis³ Lindstrom 1861 Parmorthina havliceki³ Resserella canalis³ Sowerby 1839 Isorthis sulcata³ Isorthis walmsleyi³ Isorthis jini³
Orthida - Draboviidae	Hirnantia sp.¹, ? Drabovia sp.³, Salopina carinata³ Hirnantia sp.¹ Lamont 1935 ? Drabovia sp.³ Havlicek 1950 Salopina carinata³
Atrypida - Anazygidae	Zygatrypa stenoparva³ Zygatrypa stenoparva³ Boucot et al. 1988
Atrypida - Punctatrypidae	Reticulatrypa blodgetti³, Reticulatrypa variabilis³ Reticulatrypa blodgetti³ Reticulatrypa variabilis³
Atrypida - Atrypidae	Eospinatrypa bassetti³, Eospinatrypa sagana³, Plectatrypa unicosta³, "? Eospinatrypa savagei" = Plectatrypa savagei³ Eospinatrypa bassetti³ Eospinatrypa sagana³ Boucot et al. 1988 Plectatrypa unicosta³ Zhang 1989 "? Eospinatrypa savagei" = Plectatrypa savagei³ Zhang 1989
Atrypida - Lissatrypidae	Lissatrypa cf. atheroidea³ Lissatrypa cf. atheroidea³ Twenhofel 1914
Atrypida - Atrypinidae	Gracianella dimorpha³, Spirigerina copperi³ Gracianella dimorpha³ Spirigerina copperi³ Zhang 1989
Atrypida - Glassiidae	? Glassia "sp. 2"³, ? Glassia "sp. 1"³ ? Glassia "sp. 2"³ Davidson 1881 ? Glassia "sp. 1"³ Davidson 1881
Rhynchonellida - Rhynchotrematidae	Stegerhynchus angaciensis³, Stegerhynchus estonicus³ Stegerhynchus angaciensis³ Stegerhynchus estonicus³ Rubel 1977
Rhynchonellida - Trigonirhynchiidae	"Ancillotoechia" sheehani³, Thebesia cf. thebesensis³, Rhynchotreta americaniformis³ "Ancillotoechia" sheehani³ Thebesia cf. thebesensis³ Foerste 1909 Rhynchotreta americaniformis³ Zhang 1989
Pentamerida - Pentameridae	? Lissocoelina sp.³, ? Rhipidium sp.³ ? Lissocoelina sp.³ Schuchert and Cooper 1931 ? Rhipidium sp.³ Schuchert and Cooper 1931
Pentamerida - Subrianidae	Spondylopyxis potteri³, Conchidium cf. microlocularis³, Cymbidium sp.³, Vosmiverstum breiveli³ Spondylopyxis potteri³ Conchidium cf. microlocularis³ Johnson et al. 1976 Cymbidium sp.³ Kirk 1926 Vosmiverstum breiveli³ Zhang 1989
Pentamerida - Clorindidae	Clorinda geniculata³, Clorinda sp.³ Clorinda geniculata³ Clorinda sp.³ Barrande 1879
Pentamerida - Gypidulidae	Amsdenina amsdeni³, Caryogyps grayi³, Caryogyps chattertoni³ Amsdenina amsdeni³ Caryogyps grayi³ Zhang 1989 Caryogyps chattertoni³ Zhang 1989
Pentamerida - Parastrophinidae	"Grayina cf. magnifica" = Anastrophia (Grayina)³ "Grayina cf. magnifica" = Anastrophia (Grayina)³
Strophomenata
Orthotetida - Chilidiopsidae	Morinorhynchus crispus³, Morinorhynchus miniparvicostellus³ Morinorhynchus crispus³ Lindström 1861 Morinorhynchus miniparvicostellus³ Zhang 1989
Orthotetida - Triplesiidae	Cliftonia contorta³, Streptis glomerata³ Cliftonia contorta³ Streptis glomerata³
Strophomenida - Furcitellidae	Pentlandina harperi³, ? Laevicyphomena sp.³ Pentlandina harperi³ Zhang 1989 ? Laevicyphomena sp.³
Strophomenida - Leptaenoideidae	Liljevallia amorpha³ Liljevallia amorpha³ Zhang 1989
Strophomenida - Amphistrophiidae	Amphistrophia sp.³ Amphistrophia sp.³ Hall and Clarke 1892
Strophomenida - Rafinesquinidae	Leptaena "Form 2"³ Leptaena "Form 2"³ Dalman 1828
Strophomenida - Eopholidostrophiidae	Mesopholidostrophia salopiensis³ Mesopholidostrophia salopiensis³ Cocks 1967
Strophomenida - Sowerbyellidae	"Paranisopleurella cooperi" = Eoplectodonta (Ygerodiscus)³ "Paranisopleurella cooperi" = Eoplectodonta (Ygerodiscus)³
Strophomenida - Leptestiidae	"Opikella sp." = Leangella³ "Opikella sp." = Leangella³ Opik 1933
Strophomenida - Aegiromenidae	"Aegiria grayi" = Jonesea grayi³, ? Chonetoidea cocksi³ "Aegiria grayi" = Jonesea grayi³ Davidson 1849 ? Chonetoidea cocksi³
Craniata
Trimerellida - Trimerellidae	Trimerella sp.³ Trimerella sp.³ Billings 1862

¹Rong et al. 2019; ²Wagner 2023; ³Zhang 1989