4.4 km north-north-east of Bala, Gwynedd, Rhiwlas Limestone (Ordovician of the United Kingdom)

Where: Wales, United Kingdom (52.9° N, 3.6° W: paleocoordinates 45.8° S, 17.4° W)

• outcrop-level geographic resolution

When: Paraorthograptus pacificus graptolite zone, Limestone Member (Rhiwlas Formation), Rawtheyan (455.8 - 445.6 Ma)

• Was Cautleyan, zone 5, but Baars (2013 Geological Journal: Ref #56165) presents charts putting it in Paraorthograptus pacificus zone.

• member-level stratigraphic resolution

Environment/lithology: limestone

Size classes: macrofossils, mesofossils

Primary reference: R. M. Owens. 2004. Late Ordovician and early Silurian Proetida (Trilobita) from North-Western and Central Europe. Palaeontology 47(3):557-578 [B. Kröger/B. Kröger]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 165091: authorized by Björn Kröger, entered by Björn Kröger on 12.01.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

 Proetida - Proetidae
Ogmocnemis irregularis Kielan 1960 trilobite