Zion South (S7) section, lot 10, Lake Simcoe area: Chatfieldian, Canada

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Pterobranchia - Graptoloidea - Climacograptidae
Climacograptus sp. Hall 1865
Lingulata - Lingulida - Lingulidae
Lingula sp. Bruguiére 1797
Lingulata - Lingulida - Obolidae
Lingula narrawayi Wilson 1946
recombined as Lingulella narrawayi
Lingulata - Lingulida - Trematidae
Trematis cf. ottawaensis
Strophomenata - Billingsellida - Clitambonitidae
Vellamo cf. trentonensis (Raymond 1921)
Strophomenata - Strophomenida - Sowerbyellidae
Sowerbyella subovalis Wilson 1932
Sowerbyella sericea (Sowerby 1839)
recombined as Sowerbyella (Sowerbyella) sericea
Sowerbyella cf. curdsvillensis (Foerste 1912)
Sowerbyella punctostriata (Mather 1917)
synonym of Sowerbyella curdsvillensis
Strophomenata - Strophomenida - Strophomenidae
Opikina auriculata
Opikina rugosa (Wilson 1921)
O. rugosa and O. rugosa avita
Opikina platys Wilson 1944
Strophomena delicatula
Strophomena cf. billingsi Winchell and Schuchert 1893
Strophomenata - Strophomenida - Rafinesquinidae
Rafinesquina calderi
Rafinesquina camerata
Rafinesquina esmondensis
Rafinesquina esmondensis borealis
Rafinesquina pota
Wagner 2020
Rafinesquina alternata pota
Rafinesquina quadrata
Wagner 2020
Rafinesquina alternata quadrata
Rafinesquina trentonensis (Hall 1847)
Rafinesquina deltoidea (Conrad 1838)
Rafinesquina platys (Wilson 1944)
Wagner 2020
original and current combination Rafinesquina alternata platys
Rafinesquina alternata platys
Rafinesquina alternata (Conrad 1838)
R. alternata intermedia and R. alternata alata and R. alternata plana and R. alternata platys and R. alternata pota and R. alternata quadrata
    = Rafinesquina intermedia Wilson 1944
Wagner 2020
original and current combination Rafinesquina alternata intermedia
Rafinesquina alata (Wilson 1944)
Wagner 2020
original and current combination Rafinesquina alternata alata
Rafinesquina alternata alata
Rhynchonellata - Atrypida - Anazygidae
Zygospira recurvirostris (Hall 1847)
recombined as Anazyga recurvirostra
Rhynchonellata - Protorthida - Skenidiidae
? Skenidioides merope
Rhynchonellata - Rhynchonellida - Rhynchotrematidae
Rhynchotrema increbescens (Hall 1847)
Rhynchonellata - Orthida - Dalmanellidae
Paucicrura rogata (Sardeson 1892)
Rhynchonellata - Orthida - Plectorthidae
Plectorthis sp. Hall and Clarke 1892
Plectorthis ottawaensis
Stenolaemata - Trepostomida - Monticuliporidae
Mesotrypa quebecensis
Mesotrypa whiteavesi
Prasoporina selwyni
Prasoporina semioculata
Prasopora simulatrix
P. simulatrix and P. simulatrix orientalis
cf. Homotrypa minnesotensis
Stenolaemata - Cryptostomata - Escharoporidae
Escharopora sp. Hall 1847
Escharopora cf. subrecta Ulrich 1886
Stenolaemata - Trepostomata - Heterotrypidae
Dekayella trentonensis
Stenolaemata - Trepostomata - Halloporidae
Hallopora cf. dumalis Ulrich 1893
Stenolaemata - Trepostomata - Trematoporidae
Batostoma winchelli Ulrich 1893
Stenolaemata - Trepostomata - Aisenvergiidae
Eridotrypa aedilis Eichwald 1855
Cephalopoda - Endocerida - Endoceratidae
Endoceras proteiforme Hall 1847
Cephalopoda - Orthocerida - Orthoceratidae
"Orthoceras" sp. Breynius 1832
Gastropoda - Bellerophontida - Sinuitidae
Sinuites cancellatus (Hall 1847)
Gastropoda - Bellerophontida - Bucaniidae
Salpingostoma expansum (Hall 1847)
recombined as Salpingostoma expansa
Bucania cf. punctifrons (Emmons 1842)
recombined as Undulabucania punctifrons
Gastropoda - Murchisoniina - Hormotomidae
Hormotoma gracilis (Hall 1847)
Hormotoma simplex Wilson 1932
Lophospira augustina (Billings 1865)
    = ? Hormotoma minnesotensis Ulrich and Scofield 1897
Wagner 2023
L. augustina minnesotensis of Ulrich & Scofield 1897 (not Eroicaspira augustina)
Gastropoda - Murchisoniina - Murchisoniidae
Hormotoma salteri Ulrich and Scofield 1897
recombined as Cyrtostropha salteri
H. salteri canadensis
Gastropoda - Murchisoniina - Trochonematidae
Trochonema umbilicatum (Hall 1847)
recombined as Trochonema umbilicata
Trochonema fragile Ulrich and Scofield 1897
Gastropoda - Murchisoniina - Lophospiridae
Lophospira serrulata (Salter 1859)
Lophospira ventricosa (Hall 1847)
Lophospira perangulata (Hall 1847)
Lophospira perforata Ulrich and Scofield 1897
synonym of Lophospira perangulata
Gastropoda - Murchisoniina - Loxonematidae
Omospira alexandra (Billings 1865)
Gastropoda - Murchisoniina - Subulitidae
Hormotoma bellicincta (Hall 1847)
recombined as Eroicaspira bellicincta
Gastropoda - Euomphalina - Platyceratidae
Cyclonema cf. montrealense Billings 1865
Gastropoda - Euomphalina - Helicotomidae
Helicotoma sp. Salter 1859
Bivalvia - Solemyida - Ctenodontidae
Ctenodonta logani Salter 1859
Ctenodonta nasuta (Hall 1847)
Bivalvia - Modiomorphida - Modiomorphidae
Orthodesma cf. canaliculatum Ulrich 1894
Trilobita - Corynexochida - Illaenidae
Illaenus americanus Billings 1859
replaced by Thaleops laurentiana
Trilobita - Proetida - Bathyuridae
Raymondites ingalli (Raymond 1913)
recombined as Bathyurus (Raymondites) ingalli
Trilobita - Phacopida - Calymenidae
Flexicalymene senaria (Conrad 1841)
recombined as Flexicalymene (Flexicalymene) senaria
Trilobita - Phacopida - Pterygometopidae
cf. Achatella achates (Billings 1860)
Calyptaulax alatus
Calliops callicephalus (Hall 1847)
recombined as Calyptaulax callicephalus
Calyptaulax calderi Wilson 1947
synonym of Sceptaspis lincolnensis
Trilobita - Phacopida - Cheiruridae
Ceraurus dentatus Raymond and Barton 1913
recombined as Gabriceraurus dentatus
Ceraurus pleurexanthemus Green 1832
Trilobita - Asaphida - Asaphidae
Isotelus cf. maximus Locke 1838
Trilobita - Lichida - Lichidae
Hemiarges cf. paulianus (Clarke 1894)
Scyphozoa - Conulariida - Conulariidae
Conularia sp.
Conularia trentonensis
see common names

Geography
Country:Canada State/province:Ontario
Coordinates: 44.4° North, 78.8° West (view map)
Paleocoordinates:25.1° South, 54.9° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Ordovician Epoch:Late/Upper Ordovician
10 m.y. bin:Ordovician 4-5
*Period:Middle Ordovician *Epoch:Caradocian
*Local age/stage:Trentonian
Key time interval:Chatfieldian Graptolite zone: Climacograptus americanus - Orthograptus ruedemanni
Age range of interval:453.70000 - 451.10000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Simcoe Formation:Verulam Member:Lower
Stratigraphic resolution:member
Stratigraphy comments: M5 - M6
Lithology and environment
Primary lithology:gray argillaceous "limestone"
Secondary lithology:green "shale"
Includes fossils?Y
Includes fossils?Y
Lithology description: "170 feet of grey and brownish grey, fine- and medium-grained, argillaceous and sublithographic limestone; and higher in the formation, 8- to 10-inch beds of grey, medium-crystalline, crinoidal limestone alternating with 2- to 3-foot beds of greenish grey shale. Most of the strata weather to thin, 1- to 2-inch beds and to a buff and rusty colour. The lowermost 10 to 30 feet are non-resistant and consist of an alternation of grey and brownish grey, fine-grained, argillaceous limestone and thin, 1-inch greenish shale partings."
Environment:deep subtidal indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Metadata
Database number:26273
Authorizer:S. Holland, P. Wagner Enterer:T. Hanson, P. Wagner
Modifier:P. Wagner Research group:marine invertebrate
Created:2002-10-10 20:32:18 Last modified:2018-03-24 00:27:20
Access level:the public Released:2002-10-10 20:32:18
Creative Commons license:CC BY
Reference information

Primary reference:
7251. B. A. Liberty. 1969. Palaeozoic geology of the Lake Simcoe Area, Ontario. Geological Survey of Canada Memoirs (355)1-201 [S. Holland/T. Hanson/T. Hanson]

Secondary references:

65064 P. Wagner. 2020. Subspecies kluges: a pointless taxonomic database to create species opinions for subspecies that then will be over-ruled and allow subspecies occurrences to be recognized as the subspecies rather than the parent species. [P. Wagner/P. Wagner/P. Wagner]
9042 P. J. Wagner. 2023. Paleozoic Gastropod, Rostroconch, Helcionelloid and Tergomyan Database (2006 - 2023). [P. Wagner/P. Wagner/P. Wagner]
62157 A. E. Wilson. 1946. Brachiopoda of the Ottawa Formation of the Ottawa - St. Lawrence Lowland. Geological Survey of Canada Bulletin 8:1-149 [P. Wagner/P. Wagner]