Pen Island 1, Churchill River Group Fm, Rhipidognathus symmetricus Z (Ordovician of Canada)

Where: Manitoba, Canada (56.7° N, 88.8° W: paleocoordinates 10.1° S, 49.3° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Rhipidognathus symmetricus conodont zone, Red Head Rapids Formation (Churchill River Group), Richmondian (449.6 - 445.5 Ma)

• PJW: Formation not named, but should be Red Head Rapids.

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; limestone and dolomite

• ossiliferous limestone in the lower part changing upwards to dolostone and evaporite.

Size class: microfossils

Primary reference: S. Zhang and C. R. Barnes. 2007. Late Ordovician- Early Silurian conodont biostratigraphy and thermal maturity, Hudson Bay Basin. Bulletin of Canadian Petroleum Geology 55(3):179-216 [E. Jarochowska/P. Nätscher]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 177645: authorized by Wolfgang Kiessling, entered by Mihaela Krause on 07.04.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Conodonta
 Prioniodontida -
Aphelognathus pyramidalis, Oulodus undulata
Aphelognathus pyramidalis Branson et al. 1951 conodont
 Prioniodontida - Rhipidognathidae
Rhipidognathus symmetricus
Rhipidognathus symmetricus Branson et al. 1951 conodont
 Panderodontida - Panderodontidae
Panderodus liratus, Panderodus unicostatus
Panderodus unicostatus Branson and Mehl 1933 conodont
 Protopanderodontida - Drepanoistodontidae
Drepanoistodus suberectus
Drepanoistodus suberectus Branson and Mehl 1933 conodont