Low cliffs near the head of Ellis Bay, Zone 4 (Ordovician of Canada)

Where: Québec, Canada (49.8° N, 64.3° W: paleocoordinates 22.7° S, 38.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Belonechitina gamachiana other zone, Prinsta Member (Ellis Bay Formation), Gamachian (449.5 - 443.7 Ma)

• Parastrophia reversa and Hindella beds; Given as Zone 4, which is Prinsta member; Gamachignathus ensifer and Normalograptus persculptus zones.

• bed-level stratigraphic resolution

Environment/lithology: gray, yellow limestone and gray, blue shale

• Yellowish grey, and grey, compact limestone interstratified with grey and blue shale.

Size class: macrofossils

Reposited in the YPM

Primary reference: A. Soufiane and A. Achab. 2000. Chitinozoan zonation of the Late Ordovician and the Early Silurian of the island of Anticosti, Québec, Canada. Review of Palaeobotany and Palynology 109:85-101 [P. Wagner/P. Wagner]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 63767: authorized by Pete Wagner, entered by Pete Wagner on 20.08.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Euomphalina - Platyceratidae
Cyclonema thalia Billings 1857 snail
 Euomphalina - Ophiletidae
"Eccyliomphalus nitida" = Lytospira nitida
"Eccyliomphalus nitida" = Lytospira nitida Twenhofel 1928 snail
 Bellerophontida - Sinuitidae
Sinuites cf. bilobatus de Sowerby and Murchison 1839 snail
 Bellerophontida - Plectonotidae
Tetranota cf. obsoleta Ulrich and Scofield 1897 snail
 Bellerophontida - Bucaniidae
"Bucania ellisensis n. sp." = Loxobucania ellisensis, Salpingostoma canadensis
"Bucania ellisensis n. sp." = Loxobucania ellisensis Twenhofel 1928 snail
Salpingostoma canadensis Billings 1866 snail
 Bellerophontida - Tropidodiscidae
"Oxydiscus giganteus n. sp." = Alaskadiscus giganteus
"Oxydiscus giganteus n. sp." = Alaskadiscus giganteus Twenhofel 1928 snail
 Murchisoniina - Phanerotrematidae
"? Lophospira papillosa" = Brachytomaria papillosa
"? Lophospira papillosa" = Brachytomaria papillosa Billings 1857 snail
 Murchisoniina - Eotomariidae
Liospira americana Billings 1860 snail
Clathrospira subconica Hall 1847 snail
 Murchisoniina - Lophospiridae
"Lophospira gamachiana n. sp." = Paupospira manitouliensis, "? Lophospira circe" = Paupospira circe, "Lophospira acutocarinata n. sp." = Paupospira tropidophora, "Schizolopha gigantea" = Paupospira moorei, "Lophospira sybellina" = Arjamannia sybellina
"Lophospira gamachiana n. sp." = Paupospira manitouliensis Foerste 1924 snail
"? Lophospira circe" = Paupospira circe Billings 1857 snail
"Lophospira acutocarinata n. sp." = Paupospira tropidophora Meek 1873 snail
"Schizolopha gigantea" = Paupospira moorei Ulrich and Scofield 1897 snail
"Lophospira sybellina" = Arjamannia sybellina Billings 1866 snail
 Murchisoniina - Hormotomidae
Hormotoma cf. gracilis Hall 1847 snail
 Murchisoniina - Subulitidae
Cyrtospira notata Billings 1866 snail
Subulites ellisensis n. sp. Twenhofel 1928 snail