NL27 (Silurian of the United Kingdom)

Where: Wales, United Kingdom (52.1° N, 3.6° W: paleocoordinates 36.7° S, 16.9° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: atavus - acinaces zone, Bronydd Formation, Rhuddanian (443.4 - 440.8 Ma)

• Unless a conodont zone was explicitly stated, a Late Rhudd - Late Aeron age was entered because of the statement these beds are all "pre-sedgwickii Zone." Localities are referred to the measured transects f2, h1, i2, i3, j2, and l, of Cocks et al. 1984, p178, fig.3)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified mudstone and sandstone

Collection methods: bulk,

• "... a single collection (from bulk material) [was made] from each locality, identifying and recording all fossils encountered during break up of the rock... [sacrificing commoner taxa in continued searching, or preserving rarer specimens and not breaking the rock further]...figures obtained for relative frequencies of the taxa are prob accurate...estimates of volumetric abundance...are prob too low." Sample: 6.8 kg.

Primary reference: J. T. Temple. 1987. Early Llandovery brachiopods of Wales. Palaeontological Society Monographs 139(572):1-137 [J. Alroy/M. Sommers/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 4965: authorized by John Alroy, entered by Mike Sommers on 26.08.1999, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Brachiopods... form the overwhelming preponderance of early Llandovery shelly faunas in Wales."
Strophomenata
 Strophomenida - Furcitellidae
Katastrophomena scotica Bancroft 1949
ssp. scotica
 Strophomenida - Rafinesquinidae
"Leptaena haverfordensis" = Leptaena (Leptaena) haverfordensis, "Laevicyphomena reedi" = Crassitestella reedi
"Leptaena haverfordensis" = Leptaena (Leptaena) haverfordensis Bancroft 1949
"Laevicyphomena reedi" = Crassitestella reedi Cocks 1968
 Strophomenida - Sowerbyellidae
"Eoplectodonta duplicata" = Eoplectodonta (Eoplectodonta) duplicata
"Eoplectodonta duplicata" = Eoplectodonta (Eoplectodonta) duplicata de Sowerby and Murchison 1839
 Strophomenida - Leptestiidae
Leangella scissa Davidson 1871
Rhynchonellata
 Orthida - Hesperorthidae
 Orthida - Rhipidomellidae
Mendacella mullockiensis Davidson 1869
"llandoveriana morph"
 Orthida - Dalmanellidae
 Orthida - Dicoelosiidae
 Pentamerida - Virgianidae
Brevilamnulella ? sp. Amsden 1974
sp. nov.
 Atrypida - Lissatrypidae
Meifodia prima Williams 1951
ssp. prima
 Athyridida - Meristellidae
"? Hyattidina angustifrons" = Hindella angustifrons, "Cryptothyrella crassa" = Hindella crassa
"? Hyattidina angustifrons" = Hindella angustifrons Salter 1851
"Cryptothyrella crassa" = Hindella crassa Sowerby 1839