GSC 99917. Small exposures 1.5 miles east of Junction Cliff, Zone 4 (Ordovician of Canada)

Where: Qu├ębec, Canada (49.9° N, 64.2° W: paleocoordinates 22.6° S, 38.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Hercochitina crickmayi other zone, Velleda Member (Vaureal Formation), Richmondian (449.5 - 443.7 Ma)

• Parastrophia reversa and Hindella beds; given as Gamachian. Zone 4 is Velleda Member.

•Revised stratigraphy by Copper et al. 2013. Rhipidognathus symmetricus conodont zone & P. pacificus graptolite zone.

• 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: P. Copper, J. Jin, and A. Desrochers. 2013. The Ordovician-Silurian boundary (late Katian-Hirnantian) of western Anticosti Island: revised stratigraphy and benthic megafaunal correlations. Stratigraphy 10(4):213-227 [P. Wagner/P. Wagner]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 63728: authorized by Pete Wagner, entered by Pete Wagner on 19.08.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Rostroconchia
 Ribeirioida - Technophoridae
"Technophorus plicata" = Myocaris plicata
"Technophorus plicata" = Myocaris plicata Billings 1866
Gastropoda
 Trochonematoidea - Lophospiridae
"? Lophospira ? circe" = Paupospira circe, "Schizolopha gigantea" = Paupospira moorei, "Lophospira sybellina" = Arjamannia sybellina
"? Lophospira ? circe" = Paupospira circe Billings 1857 snail
"Schizolopha gigantea" = Paupospira moorei Ulrich and Scofield 1897 snail
"Lophospira sybellina" = Arjamannia sybellina Billings 1866 snail
 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
 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 - Hormotomidae
Hormotoma cf. gracilis Hall 1847 snail