Darfel Limestone trilobites (Ordovician of the United Kingdom)

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 (460.9 - 457.5 Ma)

• limestone at base of formation

• member-level stratigraphic resolution

Environment/lithology: marine; lithified limestone

• Lithology based on Bassett et al 1966, Quart J Geol Soc 122: 219-271]

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
  -
Trilobita
 Corynexochida - Illaenidae
Illaenus sp. Dalman 1827 trilobite
 Phacopida - Encrinuridae
Encrinuridae indet. Angelin 1854 trilobite
? Deacybele sp. Whittington 1965 trilobite
 Harpida - Harpetidae
Harpes sp. Goldfuss 1839 trilobite
 Asaphida - Raphiophoridae
Ampyx sp. Dalman 1827 trilobite
 Asaphida - Trinucleidae
 Lichida - Lichidae
Platylichas sp. Gürich 1901 trilobite
Strophomenata
 Orthotetida - Triplesiidae
 Billingsellida - Gonambonitidae
 Strophomenida - Sowerbyellidae
Sowerbyella sp. Jones 1928
Eoplectodonta lenis Whittington and Williams 1955
 Strophomenida - Aegiromenidae
Sericoidea abdita Whittington and Williams 1955
 Strophomenida - Leptestiidae
 Strophomenida - Leptellinidae
"Palaeostrophomena magnifica" = Glyptambonites magnificus
"Palaeostrophomena magnifica" = Glyptambonites magnificus Williams 1955
 Strophomenida - Rafinesquinidae
Kjaerina sp. Bancroft 1929
Kiaeromena sp. Spjeldnaes 1957
Rhynchonellata
 Orthida - Linoporellidae
Salopia salteri Davidson 1869
subspecies gracilis
 Orthida - Dalmanellidae
 Orthida - Harknessellidae
Horderleyella sp. Bancroft 1928
 Orthida - Archaeorthidae
"Cyrtonotella aff. kukersiana" = Cyrtonotella kuckersiana
"Cyrtonotella aff. kukersiana" = Cyrtonotella kuckersiana Wysogorski 1900
 Orthida - Productorthidae
 Orthida - Hesperorthidae
 Orthida - Platystrophiidae
Platystrophia precedens
subspecies major