Shipshaw River 1 km downstream from the dam at Chute aux Galets (Ordovician of Canada)

Where: Quebec, Canada (48.6° N, 71.2° W: paleocoordinates 24.1° S, 47.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Climacograptus pygmaeus graptolite zone, Unit 1 Member (Shipshaw Formation), Edenian (451.0 - 450.2 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: shale and wackestone

• This unit is a succession of shale and interbedded wackestone, packstone, and grainstone that is up to 15 m in thickness

Size class: macrofossils

Reposited in the GSC

Primary reference: P. J. Lespérance and D. Desbiens. 1995. Selected Ordovician trilobites from the Lake St. John District of Quebec and their bearing on systematics. Paleontological Society Memoir 42:1-19 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 163865: authorized by Pete Wagner, entered by Pete Wagner on 18.11.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Phacopida - Calymenidae
"Flexicalymene senaria" = Flexicalymene (Flexicalymene) senaria
"Flexicalymene senaria" = Flexicalymene (Flexicalymene) senaria Conrad 1841 trilobite
 Phacopida - Encrinuridae
Encrinuroides "n. sp.", "? Encrinuroides spicatus" = Erratencrinurus spicatus
Encrinuroides "n. sp." Reed 1931 trilobite
"? Encrinuroides spicatus" = Erratencrinurus spicatus Tripp 1974 trilobite
 Phacopida - Cheiruridae
"Sphaerocoryphe robustus" = Sphaerocoryphe robusta Walcott 1875 trilobite
Ceraurinus marginatus Barton 1913 trilobite
Ceraurus matranseris Sinclair 1947 trilobite
 Phacopida - Pterygometopidae
Calyptaulax callicephalus Hall 1847 trilobite
Sceptaspis lincolnensis Branson 1909 trilobite
Achatella achates Billings 1860 trilobite
 Asaphida - Remopleurididae
Hypodicranotus striatulus Walcott 1875 trilobite
 Asaphida - Asaphidae
Isotelus gigas Dekay 1824 trilobite
 Odontopleurida - Odontopleuridae
Primaspis sp. Richter and Richter 1917 trilobite
 Lichida - Lichidae
Hemiarges paulianus Clarke 1894 trilobite
Amphilichas sp. Raymond 1905 trilobite
 Proetida - Otarionidae
"Otarion" sp. Zenker 1833 trilobite
 Proetida - Proetidae
Proetidae "n.gen. n.sp." Salter 1864 trilobite
 Proetida - Dimeropygidae
 Harpetida - Harpetidae
 Corynexochida - Illaenidae
Bumastoides sp., "Illaenus americanus" = Thaleops laurentiana
Bumastoides sp. Whittington 1954 trilobite
"Illaenus americanus" = Thaleops laurentiana Amati and Westrop 2004 trilobite
 Corynexochida - Styginidae