Garth, G29A,B (Silurian of the United Kingdom)

Where: Wales, United Kingdom (52.2° N, 3.5° W: paleocoordinates 36.6° S, 16.8° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: acinaces - cyphus zone, shelly facies Member, Rhuddanian (443.4 - 440.8 Ma)

• No formation name. [Late Rhuddanian entered because of the listed biozone.]

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, sandy siltstone

• "...consists of detrital sediments, but mainly mudstones and sandstones, and with a fauna predominantly of brachiopods."

Collection methods: bulk,

• Apparently two seperate grabs were made, differentiated by thickness and mass: A = 40 mm, 5.5 kg; B = 30 mm, 5.5 kg. Abundances in comment field.

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 3472: authorized by John Alroy, entered by Mike Sommers on 02.08.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• Brachiopods only, except a few graptolites.
Rhynchonellata
 Atrypida - Atrypinidae
Pterobranchia
 Graptoloidea - Neodiplograptidae
"? Diplograptus magnus" = Neodiplograptus magnus
"? Diplograptus magnus" = Neodiplograptus magnus Lapworth 1900 graptolite
"??"; A
 Graptoloidea - Normalograptidae
? Rhaphidograptus toernquisti Elles and Wood 1906 graptolite
A
 Graptoloidea - Monograptidae
? Pseudoclimacograptus (Clinoclimacograptus) retroversus Bulman and Rickards 1968 graptolite
A
Rhynchonellata
 Orthida - Rhipidomellidae
Mendacella mullockiensis Davidson 1869
llandoveriana morph; A76, B4
 Atrypida - Lissatrypidae
Meifodia prima Williams 1951
ssp. indet.; A2, B2
 Protorthida - Skenidiidae
"Skenidioides ? woodlandiense" = Skenidioides woodlandiensis
"Skenidioides ? woodlandiense" = Skenidioides woodlandiensis Davidson 1882
B
Strophomenata
 Strophomenida - Aegiromenidae
Aegiria garthensis Jones 1928
A
 Strophomenida - Leptestiidae
Leangella scissa Davidson 1871
A10, B25
 Strophomenida - Sowerbyellidae
"Eoplectodonta duplicata" = Eoplectodonta (Eoplectodonta) duplicata
"Eoplectodonta duplicata" = Eoplectodonta (Eoplectodonta) duplicata de Sowerby and Murchison 1839
B
 Strophomenida - Rafinesquinidae
"Leptaena haverfordensis" = Leptaena (Leptaena) haverfordensis
"Leptaena haverfordensis" = Leptaena (Leptaena) haverfordensis Bancroft 1949
B
 Strophomenida - Furcitellidae
 Orthotetida - Triplesiidae
Craniata
 Craniopsida - Craniopsidae
Paracraniops sp. Williams 1963
A2, B1
 Craniida - Craniidae