Where: Wales, United Kingdom (52.9° N, 3.6° W: paleocoordinates 54.4° S, 18.9° W)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Derfel Member (Nant Hir Mudstones Formation), Costonian (458.4 - 457.2 Ma)
• limestone at base of formation
• member-level stratigraphic resolution
Environment/lithology: marine; lithified limestone
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 188595: authorized by Melanie Hopkins, entered by Melanie Hopkins on 08.09.2017
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Rhynchonellata | |
Horderleyella sp. Bancroft 1928 | |
Howellites sp. Bancroft 1945 | |
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"Cyrtonotella aff. kukersiana" = Cyrtonotella kuckersiana
"Cyrtonotella aff. kukersiana" = Cyrtonotella kuckersiana Wysogorski 1900 | |
Glossorthis sp. Öpik 1930 | |
Strophomenata | |
Kiaeromena sp. Spjeldnaes 1957
Kjaerina sp. Bancroft 1929 | |
Sericoidea abdita Whittington and Williams 1955 | |
"Palaeostrophomena magnifica" = Glyptambonites magnificus
"Palaeostrophomena magnifica" = Glyptambonites magnificus Williams 1955 | |
Leptestiina derfelensis Jones 1928 | |
Sowerbyella sp. Jones 1928
Eoplectodonta lenis Whittington and Williams 1955 | |
Kullervo aff. panderi Opik 1930 | |
Trilobita | |
Illaenus sp. Dalman 1827 trilobite | |
Platylichas sp. Gürich 1901 trilobite | |
Encrinuridae indet. Angelin 1854 trilobite
? Deacybele sp. Whittington 1965 trilobite | |
Ampyx sp. Dalman 1827 trilobite | |
Broeggerolithus cf. harnagensis trilobite | |
Harpes sp. Goldfuss 1839 trilobite |