Where: Wales, United Kingdom (52.9° N, 3.6° W: paleocoordinates 53.3° S, 18.7° W)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Nant Hir Mudstones Formation (Lower Bala Group), Costonian to Costonian (460.9 - 455.8 Ma)
• upper part of formation above Derfel Limestone
• member-level stratigraphic resolution
Environment/lithology: marine; lithified, blue mudstone and lithified siltstone
Size class: macrofossils
Preservation: mold/impression
Reposited in the BMNH
Primary reference: H. B. Whittington. 1968. The Ordovician trilobites of the Bala Area, Merioneth. Part IV. Monograph of the Palaeontographical Society 122(520):93-138 [M. Hopkins/M. Hopkins]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 188594: authorized by Melanie Hopkins, entered by Melanie Hopkins on 08.09.2017
Creative Commons license: CC BY (attribution)
Taxonomic list
Strophomenata | |
"Sowerbyella sericea" = Sowerbyella (Sowerbyella) sericea
| |
Sericoidea abdita Whittington and Williams 1955 | |
? Hedstroemina sp. Bancroft 1929 | |
Rhynchonellata | |
Dinorthis berwynensis Whittington 1938 | |
| |
Lingulata | |
Lingulella sp. Salter 1866 | |
Trilobita | |
Ampyx sp. Dalman 1827 trilobite | |
"Broeggerolithus cf. ulrichi" = Broeggerolithus broeggeri ulrichi
"Broeggerolithus cf. ulrichi" = Broeggerolithus broeggeri ulrichi Bancroft 1949 trilobite | |
Brongniartella sp. Reed 1918 trilobite | |
Flexicalymene sp. Shirley 1936 trilobite |