Ffridd Mathrafal (Meifod 6701): Llandovery, United Kingdom

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Harpidae indet.
1 specimen
gen. et sp. indet.
Brachiopoda indet. Cuvier 1805
21 specimens
Craniata - Craniida - Craniidae
Craniidae indet. Menke 1828
4 specimens
Philhedra grayii
1 specimen
Craniata - Craniopsida - Craniopsidae
Paracraniops sp. Williams 1963
3 specimens
Lingulata - Lingulida
Lingulacea indet. Menke 1828
2 specimens
replaced by Linguloidea
gen. et sp. indet.
Rhynchonellata - Pentamerida
Pentameracea indet. M'Coy 1844
30 specimens
replaced by Pentameroidea
Most probably all belong to Stricklandia sp.
Rhynchonellata - Pentamerida - Clorindidae
Clorinda sp. Barrande 1879
8 specimens
Rhynchonellata - Pentamerida - Stricklandiidae
Stricklandia sp. Billings 1859
59 specimens
Rhynchonellata - Orthida - Dalmanellidae
Resserella llandoveryiana
122 specimens
62 specimens
subsp. silvicola
Rhynchonellata - Orthida - Kayserellidae
Kayserella sp.
6 specimens
sp. nov.
Rhynchonellata - Orthida - Dicoelosiidae
Dicoelosia cf. indenta (Cooper 1930)
61 specimens
originally entered as "Dicoelosia cf. indenta"
Rhynchonellata - Orthida - Saukrodictyidae
Saukrodictya sp. Wright 1964
23 specimens
Rhynchonellata - Orthida - Giraldiellidae
Giraldiella cf. protensa (de Sowerby 1839)
1 specimen
subsp. filitexta - originally entered as "Giraldiella cf. protensa"
Rhynchonellata - Orthida - Wangyuiidae
Toxorthis sp.
2 specimens
sp. nov.
Rhynchonellata - Orthida - Hesperorthidae
Schizonema capillata Temple 1970
26 specimens
corrected as Schizonema capillatum
Dolerorthis sp. Schuchert and Cooper 1931
10 specimens
sp. nov.
Dolerorthis sowerbyiana (Davidson 1869)
23 specimens
Rhynchonellata - Orthida
Orthacea indet. Woodward and Schuchert 1852
23 specimens
replaced by Orthoidea
Enteletacea indet. Waagen 1884
3 specimens
gen. et sp. indet.
Enteletacea indet. Waagen 1884
33 specimens
these probably belong to Resserella llandoveryiana
Rhynchonellata - Protorthida - Skenidiidae
Skenidioides sp. Schuchert and Cooper 1931
67 specimens
Rhynchonellata - Rhynchonellida - Rhynchotrematidae
Rhynchotrema sp. Hall 1860
32 specimens
Rhynchonellata - Atrypida - Atrypinidae
Plectatrypa gaspeensis Schuchert and Cooper 1930
32 specimens
recombined as Spirigerina (Eospirigerina) gaspeensis
Rhynchonellata - Atrypida - Lissatrypidae
Meifodia subundata (McCoy 1851)
7 specimens
Rhynchonellata - Atrypida - Protozygidae
Protozyga aff. gastrodes
3 specimens
"ex gr." gastrodes - originally entered as "Protozyga aff. gastrodes"
Strophomenata - Strophomenida - Leptestiidae
Leangella scissa (Davidson 1871)
99 specimens
Strophomenata - Strophomenida - Sowerbyellidae
Anisopleurella gracilis (Jones 1928)
46 specimens
recombined as Kozlowskites gracilis
Eoplectodonta duplicata (de Sowerby and Murchison 1839)
186 specimens
recombined as Eoplectodonta (Eoplectodonta) duplicata
subsp. undulata
Strophomenata - Strophomenida - Eopholidostrophiidae
Eopholidostrophia sefinensis (Williams 1951)
20 specimens
Stropheodonta sefinensis
subsp. nov.
Strophomenata - Strophomenida - Rafinesquinidae
Leptaenidae indet. Hall and Clarke 1894
8 specimens
replaced by Leptaeninae
Leptaena valentia Cocks 1968
9 specimens
recombined as Leptaena (Leptaena) valentia
Leptaena reedi Cocks 1968
7 specimens
recombined as Crassitestella reedi
Strophomenata - Strophomenida - Leptostrophiidae
Leptostrophia reedi Bancroft 1949
2 specimens
Strophomenata - Strophomenida - Stropheodontidae
Stropheodontidae indet. Caster 1939
7 specimens
Strophomenata - Orthotetida - Chilidiopsidae
Fardenia sp. Lamont 1935
18 specimens
Strophomenata - Orthotetida - Triplesiidae
Triplesia sp. Hall 1859
3 specimens
Trilobita - Proetida - Proetidae
Proetidae indet. Salter 1864
3 specimens
Trilobita - Proetida - Otarionidae
Otarion sp. Zenker 1833
1 specimen
Trilobita - Phacopida - Cheiruridae
Deiphon sp. Barrande 1846
3 specimens
Trilobita - Phacopida - Encrinuridae
Encrinurus cf. mullochensis Reed 1931
34 specimens
originally entered as "Encrinurus cf. mullochensis"
Trilobita - Phacopida - Calymenidae
Calymene sp. Brongniart 1822
Temple 1975
sp. A
Diacalymene sp. Kegel 1927
10 specimens
Trilobita - Phacopida - Phacopidae
Acernaspis sp. Campbell 1967
2 specimens
Trilobita - Lichida - Lichidae
Lichidae indet. Hawle and Corda 1847
1 specimen
Trilobita - Corynexochida - Illaenidae
Stenopareia sp. Holm 1886
7 specimens
see common names

Geography
Country:United Kingdom State/province:Wales County:Montgomeryshire
Coordinates: 52.7° North, 3.3° West (view map)
Paleocoordinates:32.9° South, 16.0° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Silurian Epoch:Llandovery
10 m.y. bin:Silurian 1
*Epoch:Early/Lower Llandovery
Key time interval:Llandovery
Age range of interval:443.80000 - 433.40000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Stratigraphic resolution:group of beds
Stratigraphy comments: "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].
Lithology and environment
Primary lithology:burrows lithified siltstone
Environment:marine indet.
Geology comments: Blue siltstone with interbedded micaceous layers. Fossils preserved mostly as moulds with occasionally-retained shell material.
Taphonomy
Modes of preservation:body
Collection methods and comments
Collection excludes:some macrofossils
Collection methods:bulk,mechanical,field collection
Reason for describing collection:taxonomic analysis
Taxonomic list comments:"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."
Metadata
Also known as:6701
Database number:3207
Authorizer:J. Alroy Enterer:M. Sommers
Modifier:C. Visaggi Research group:marine invertebrate
Created:1999-07-27 15:57:02 Last modified:2004-03-11 16:25:07
Access level:the public Released:2000-11-20 13:53:19
Creative Commons license:CC BY
Reference information

Primary reference:
147. 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]

Secondary references:

202 J. T. Temple. 1975. Early Llandovery trilobites from Wales with notes on British Llandovery Calymenids. Palaeontology 18(1):137-159 [J. Alroy/M. Sommers/J. Alroy]