MacDonald River Section Unit 09 146-166 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 crickmayi other zone, Homard Member (Vauréal Formation), Richmondian (449.6 - 445.5 Ma)

• Given as Vaureal Zone 1.

• group of beds-level stratigraphic resolution

Environment/lithology: blue limestone and blue shale

• Hard, blue limestone in 2 to 6-inch beds separated by beds of blue shale of 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 173875: authorized by Pete Wagner, entered by Pete Wagner on 20.10.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Pterobranchia
 Graptoloidea - Climacograptidae
"Mesograptus putillus" = Climacograptus putillus
"Mesograptus putillus" = Climacograptus putillus Hall 1865 climacograptid
Rhynchonellata
 Atrypida - Anazygidae
"Zygospira recurvirostris" = Anazyga recurvirostra
"Zygospira recurvirostris" = Anazyga recurvirostra Hall 1847
Zygospira recurvirostris aequivalvis
Strophomenata
 Strophomenida - Plectambonitidae
Plectambonites sericeus Sowerby 1839
Plectambonites sericeus glaber
 Strophomenida - Furcitellidae
"? Leptaena nitens" = Megamyonia nitens, "? Leptaena gracilis" = Megamyonia gracilis
"? Leptaena nitens" = Megamyonia nitens Billings 1860
"? Leptaena gracilis" = Megamyonia gracilis Twenhofel 1928
Bivalvia
 Cyrtodontida - Cyrtodontidae
Whitella sigmoidea Billings 1858 clam
Trilobita
 Asaphida - Asaphidae
Isotelus gigas Dekay 1824 trilobite