Ffridd Mathrafal (Meifod 6701) (Silurian of the United Kingdom)

Also known as 6701

Where: Wales, United Kingdom (52.7° N, 3.3° W: paleocoordinates 32.9° S, 16.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Llandovery (443.4 - 433.4 Ma)

• "The siltstones from which the fauna was collected lie about 120 m above the base of the Silurian...they appear to belong to King's (1928) horizon V2c. The present investigation supports Williams (1951) age assement [high Lower Llandovery; A3-4].

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, burrowed siltstone

• Blue siltstone with interbedded micaceous layers. Fossils preserved mostly as moulds with occasionally-retained shell material.

Collection methods: bulk, mechanical,

Primary reference: J. T. Temple. 1970. The Lower Llandovery brachiopods and trilobites from Ffridd Mathrafal, near Meifod, Montgomeryshire. Palaeontological Society Monographs 124(527):1-76 [J. Alroy/M. Sommers/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 3207: authorized by John Alroy, entered by Mike Sommers on 27.07.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• "In addition to the brachs and trilobites...there are also bryozoans, corals (often encrusting brachs), crinoid columnals, gastropods and ostracods. Burrows passing obliquely through the sed layers are common."
Show authors, comments, and common names
unclassified
  -
Harpidae indet.
Harpidae indet.
gen. et sp. indet.
Brachiopoda
  -
Brachiopoda indet.
Brachiopoda indet. Cuvier 1805
Lingulata
 Lingulida -
"Lingulacea indet." = Linguloidea
"Lingulacea indet." = Linguloidea Menke 1828
gen. et sp. indet.
Rhynchonellata
 Orthida -
"Orthacea indet." = Orthoidea
"Orthacea indet." = Orthoidea Woodward 1852
 Orthida - Hesperorthidae
Dolerorthis sp., Dolerorthis sowerbyiana, "Schizonema capillata" = Schizonema capillatum
Dolerorthis sp. Schuchert and Cooper 1931
sp. nov.
Dolerorthis sowerbyiana Davidson 1869
"Schizonema capillata" = Schizonema capillatum Temple 1970
 Orthida -
Enteletacea indet., Enteletacea indet.
Enteletacea indet. Waagen 1884
gen. et sp. indet.
Enteletacea indet. Waagen 1884
these probably belong to Resserella llandoveryiana
 Orthida - Wangyuiidae
Toxorthis sp.
Toxorthis sp.
sp. nov.
 Orthida - Giraldiellidae
Giraldiella cf. protensa
Giraldiella cf. protensa de Sowerby 1839
subsp. filitexta - originally entered as "Giraldiella cf. protensa"
 Orthida - Saukrodictyidae
Saukrodictya sp.
Saukrodictya sp. Wright 1964
 Orthida - Kayserellidae
Kayserella sp.
Kayserella sp.
sp. nov.
 Orthida - Dalmanellidae
Onniella rava, Resserella llandoveryiana
Onniella rava Marek and Havlíček 1967
subsp. silvicola
 Orthida - Dicoelosiidae
Dicoelosia cf. indenta
Dicoelosia cf. indenta Cooper 1930
originally entered as "Dicoelosia cf. indenta"
 Atrypida - Protozygidae
Protozyga aff. gastrodes
Protozyga aff. gastrodes
"ex gr." gastrodes - originally entered as "Protozyga aff. gastrodes"
 Atrypida - Lissatrypidae
Meifodia subundata
Meifodia subundata McCoy 1851
 Atrypida - Atrypinidae
"Plectatrypa gaspeensis" = Spirigerina (Eospirigerina) gaspeensis
"Plectatrypa gaspeensis" = Spirigerina (Eospirigerina) gaspeensis Schuchert and Cooper 1930
 Rhynchonellida - Rhynchotrematidae
Rhynchotrema sp.
Rhynchotrema sp. Hall 1860
 Pentamerida - Clorindidae
Clorinda sp.
Clorinda sp. Barrande 1879
 Pentamerida - Stricklandiidae
Stricklandia sp.
Stricklandia sp. Billings 1859
 Pentamerida -
"Pentameracea indet." = Pentameroidea
"Pentameracea indet." = Pentameroidea McCoy 1844
Most probably all belong to Stricklandia sp.
 Protorthida - Skenidiidae
Skenidioides sp.
Skenidioides sp. Schuchert and Cooper 1931
Strophomenata
 Orthotetida - Triplesiidae
Triplesia sp.
Triplesia sp. Hall 1859
 Orthotetida - Chilidiopsidae
Fardenia sp.
Fardenia sp. Lamont 1935
 Strophomenida - Stropheodontidae
Stropheodontidae indet.
 Strophomenida - Sowerbyellidae
"Anisopleurella gracilis" = Kozlowskites gracilis, "Eoplectodonta duplicata" = Eoplectodonta (Eoplectodonta) duplicata
"Anisopleurella gracilis" = Kozlowskites gracilis Jones 1928
"Eoplectodonta duplicata" = Eoplectodonta (Eoplectodonta) duplicata de Sowerby and Murchison 1839
subsp. undulata
 Strophomenida - Leptestiidae
Leangella scissa
Leangella scissa Davidson 1871
 Strophomenida - Rafinesquinidae
"Leptaena valentia" = Leptaena (Leptaena) valentia, "Leptaenidae indet." = Leptaeninae, "Leptaena reedi" = Crassitestella reedi
"Leptaena valentia" = Leptaena (Leptaena) valentia Cocks 1968
"Leptaenidae indet." = Leptaeninae Hall and Clarke 1894
"Leptaena reedi" = Crassitestella reedi Cocks 1968
 Strophomenida - Leptostrophiidae
Leptostrophia reedi
Leptostrophia reedi Bancroft 1949
 Strophomenida - Eopholidostrophiidae
Eopholidostrophia sefinensis
Eopholidostrophia sefinensis Williams 1951
subsp. nov.
Craniata
 Craniida - Craniidae
Craniidae indet., Philhedra grayii
Craniidae indet. Menke 1828
 Craniopsida - Craniopsidae
Paracraniops sp.
Paracraniops sp. Williams 1963
Trilobita
 Proetida - Proetidae
Proetidae indet.
Proetidae indet. Salter 1864 trilobite
 Proetida - Otarionidae
Otarion sp.
Otarion sp. Zenker 1833 trilobite
 Lichida - Lichidae
Lichidae indet.
Lichidae indet. Hawle and Corda 1847 trilobite
 Corynexochida - Illaenidae
Stenopareia sp.
Stenopareia sp. Holm 1886 trilobite
 Phacopida - Encrinuridae
Encrinurus cf. mullochensis
Encrinurus cf. mullochensis Reed 1931 trilobite
originally entered as "Encrinurus cf. mullochensis"
 Phacopida - Cheiruridae
Deiphon sp.
Deiphon sp. Barrande 1846 trilobite
 Phacopida - Phacopidae
Acernaspis sp.
Acernaspis sp. Campbell 1967 trilobite
 Phacopida - Calymenidae
Calymene sp., Diacalymene sp.
Calymene sp. Brongniart 1822 trilobite
sp. A
Diacalymene sp. Kegel 1927 trilobite