MacDonald River Section Unit 07 084-134 ft (Ordovician of Canada)

Where: Quebec, Canada (49.7° N, 63.0° W: paleocoordinates 23.1° S, 38.1° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Hercochitina normalis other zone, Easton Member (Vauréal Formation), Richmondian (449.5 - 443.7 Ma)

• Given as English Head Zone 4.

• group of beds-level stratigraphic resolution

Environment/lithology: nodular, blue, calcareous shale and blue limestone

• Nodular, calcareous, blue shale with several groups of 2 to 6-inch beds of hard, blue limestone at distances of 15 to 25 feet apart, the limestone layers being separated by beds of blue shale of about equal thickness

Size classes: macrofossils, mesofossils

Reposited in the GSC

Primary reference: W. H. Twenhofel. 1928. Geology of Anticosti Island. Geological Survey of Canada Memoir 154(2132):1-351 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 174027: authorized by Pete Wagner, entered by Pete Wagner on 23.10.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Phacopida - Cheiruridae
Ceraurinus icarus Billings 1860 trilobite
 Phacopida - Calymenidae
"Calymene meeki" = Flexicalymene meeki
"Calymene meeki" = Flexicalymene meeki Foerste 1910 trilobite
Lophophorata
 Tentaculitida - Costatulitidae
"Cornulites richmondensis" = Costatulites richmondensis
"Cornulites richmondensis" = Costatulites richmondensis Miller 1874
Strophomenata
 Strophomenida - Plectambonitidae
Plectambonites sericeus Sowerby 1839
/Plectambonites sericeus glaber
 Strophomenida - Strophomenidae
"Strophomena planocorrugata" = Rugomena planocorrugata, "? Leptaena gracilis" = Megamyonia gracilis, "? Leptaena nitens" = Megamyonia nitens
"Strophomena planocorrugata" = Rugomena planocorrugata Twenhofel 1928
"? Leptaena gracilis" = Megamyonia gracilis Twenhofel 1928
"? Leptaena nitens" = Megamyonia nitens Billings 1860
Rhynchonellata
 Atrypida - Anazygidae
Catazyga anticostiensis, "Zygospira recurvirostris" = Anazyga recurvirostra
"Zygospira recurvirostris" = Anazyga recurvirostra Hall 1847
Zygospira recurvirostris aequivalvis
 Orthida - Dalmanellidae
"Dalmanella meeki" = Cincinnetina meeki
"Dalmanella meeki" = Cincinnetina meeki Miller 1875
 Orthida - Plaesiomyidae
"Dinorthis carletona" = Dinorthis (Pionorthis) carletona
"Dinorthis carletona" = Dinorthis (Pionorthis) carletona Twenhofel 1928
Bivalvia
 Cyrtodontida - Cyrtodontidae
Whitella sigmoidea Billings 1858 clam
Gastropoda
 Murchisoniina - Eotomariidae
Liospira americana Billings 1860 snail
Stenolaemata
 Cryptostomata - Ptilodictyidae
Ptilodictya flagella Nicholson 1875
 Cryptostomata - Arthrostylidae
Sceptropora facula Ulrich 1888