Roadside near Chapel (Ordovician of the United Kingdom)

Where: Wales, United Kingdom (51.8° N, 3.6° W: paleocoordinates 46.8° S, 17.6° W)

• small collection-level geographic resolution

When: Rawtheyan (448.8 - 445.2 Ma)

• no formation name given.

• member-level stratigraphic resolution

Environment/lithology: offshore; lithified, bioturbated, concretionary, pyritic, gray siltstone

• dark to blue-grey muddy siltstones weathering paler or mottled, with manganese stained surfaces. widely dispersed grains of quartz, feldspar, secondary pyrite up to 0.2 mm. bioturbation; nodules several cm diam;

Primary reference: A. Williams and A. D. Wright. 1981. The Ordovician-Silurian boundary in the Garth area of southwest Powys, Wales. Geological Journal 16:1-39 [J. Alroy/M. Sommers/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 8370: authorized by John Alroy, entered by Mike Sommers on 10.07.2000, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Othacea indet., Leptestiinidae indet.
Othacea indet.
orthacean
Leptestiinidae indet.
leptestiinid
Scyphozoa
 Conulariida - Conulariidae
Exoconularia sp.
unclassified
  -
Problematica indet., Porifera indet.
Problematica indet. Andrews 1970
as if there weren't enough already
Porifera indet. Grant 1836
sponge
Demospongiae
 Sigmatosclerophorida - Dystactospongiidae
Heterospongia indet.
Pterobranchia
 Graptoloidea - Diplograptidae
Diplograptidae indet.
Diplograptidae indet. graptolite
diplograptid
Crinoidea
  -
Crinoidea indet.
Crinoidea indet. Miller 1821 Sea lily
ossicles
unclassified
  -
Pelmatozoa indet.
Pelmatozoa indet. Leuckart 1848
ossicles
Cystoidea
  -
Cystoidea indet.
Cystoidea indet. von Buch 1846
Hyolitha
  -
Hyolitha indet.
Hyolitha indet. Marek 1963
hyolith
 Hyolithida - Hyolithidae
Elegantilites cf. asteroideus, Sololites sp.
Sololites sp. Marek 1967
 Orthothecida - Orthothecidae
Orthothecidae indet., Bactrotheca sp.
Orthothecidae indet. Syssoiev 1957
orthothecid
Bactrotheca sp. Novak 1891
including 3 ? Bactrotheca
Bryozoa
  -
Bryozoa indet.
Bryozoa indet. Ehrenberg 1831
Stenolaemata
 Trepostomata -
Trepostomata indet.
Trepostomata indet. Ulrich 1882
trepostome
Rhynchonellata
 Atrypida - Cyclospiridae
Cyclospira sp.
Cyclospira sp. Hall and Clarke 1893
 Orthida - Dalmanellidae
Dalmanellidae indet., Dalmanella sp., Dalmanella cf. sculpta, ? Dedzetina sp.
Dalmanellidae indet. Schuchert 1913
dalmanellid
Dalmanella sp. Hall and Clarke 1892
 Orthida - Rhactorthidae
? Rhactorthis sp.
? Rhactorthis sp. Williams 1963
 Orthida - Glyptorthidae
? Glyptorthis sp.
? Glyptorthis sp. Foerste 1914
Strophomenata
 Strophomenida - Aegiromenidae
? Chonetoidea sp., Chonetoidea sp., Sericoidea sp.
? Chonetoidea sp. Jones 1928
Chonetoidea sp. Jones 1928
Sericoidea sp. Lindström 1953
 Strophomenida - Bimuriidae
? Bimuria sp.
? Bimuria sp. Ulrich and Cooper 1942
 Strophomenida - Hesperomenidae
"Trimurellina sp." = Kassinella (Trimurellina)
"Trimurellina sp." = Kassinella (Trimurellina) Mitchell 1977
 Strophomenida -
"Plectambonitacea indet." = Plectambonitoidea
"Plectambonitacea indet." = Plectambonitoidea Jones 1928
plectambonitacean
 Strophomenida - Leptostrophiidae
? Eostropheodonta sp.
? Eostropheodonta sp. Bancroft 1949
 Strophomenida - Rafinesquinidae
Leptaena sp., Leptaena rugosa, Rhactomena sp.
Leptaena sp. Dalman 1828
Leptaena rugosa Dalman 1828
Rhactomena sp. Mitchell 1977
 Strophomenida -
"Strophomenacea indet." = Strophomenoidea
"Strophomenacea indet." = Strophomenoidea King 1846
strophomenacean
 Orthotetida - Triplesiidae
Cliftonia cf. oxoplecioides
Polychaeta
  -
Machaeridia indet.
Machaeridia indet. scale worm
macheridian
Tergomya
 Cyrtonellida - Cyrtolitidae
Cyrtolites sp.
Cyrtolites sp. Conrad 1838
 Tryblidiida - Tryblidiidae
? Archinacellina sp.
Bivalvia
  -
Bivalvia indet.
Bivalvia indet. Linnaeus 1758 clam
1x mytiliform, 1x reticulate
 Solemyida - Ctenodontidae
Ctenodontidae indet.
Ctenodontidae indet. Wöhrmann 1893 clam
ctenodontid
 Nuculida - Cardiolariidae
Deceptrix sp.
Deceptrix sp. Fuchs 1919 clam
 Nuculida - Praenuculidae
Praenucula sp.
Praenucula sp. Pfab 1934 clam
including 22x ? Praenucula
 Nuculida -
Nuculacea indet.
Nuculacea indet. Gray 1824 clam
nuculacean
Cephalopoda
 Orthocerida - Orthoceratidae
Orthoceras sp.
Orthoceras sp. Breynius 1832
 Orthocerida - Kionoceratidae
Polygrammoceras sp.
Polygrammoceras sp. Foerste 1927
Gastropoda
  -
Gastropoda indet., Gastropoda sp.
Gastropoda indet. Cuvier 1795 snail
6 high spired, 36 gastro indet, 1 discoidal
Gastropoda sp. Cuvier 1795 snail
 Pleurotomariacea -
"Pleurotomariacea indet." = Pleurotomarioidea
"Pleurotomariacea indet." = Pleurotomarioidea Swainson 1840 snail
pleurotomaria
 Bellerophontida - Tropidodiscidae
Tropidodiscus sp.
Tropidodiscus sp. Meek and Worthen 1866 snail
 Bellerophontida -
Bellerophontoidea indet.
Bellerophontoidea indet. M'Coy 1851 snail
bellerophontacean
 Bellerophontida - Plectonotidae
Tritonophon aff. bohemica
Tritonophon aff. bohemica Perner 1903 snail
 Euomphalina - Elasmonematidae
? Streptotrochus sp.
? Streptotrochus sp. Perner 1907 snail
including 4x cf. ? Streptotrochus
 Euomphalina - Anomphalidae
Anomphalidae indet.
Anomphalidae indet. Wenz 1938 snail
anomphalid
 Euomphalina - Holopeidae
Holopea sp.
Holopea sp. Hall 1847 snail
 Euomphalina - Euomphalidae
Euomphalus sp.
Euomphalus sp. Sowerby 1814 snail
sp. A
 Murchisoniina - Loxonematidae
Loxonema sp.
Loxonema sp. Phillips 1841 snail
3 sp., 86 L. sp. A
 Murchisoniina - Eotomariidae
? Eotomaria sp.
? Eotomaria sp. Ulrich and Scofield 1897 snail
 Murchisoniina - Lophospiridae
Donaldiella sp., Lophospira sp.
Donaldiella sp. Cossmann 1903 snail
Lophospira sp. Whitfield 1886 snail
17 L. sp., 41 L. sp. C, 11 L. sp. B, 155 L. sp. A
 Murchisoniina - Murchisoniidae
Murchisonia sp.
Murchisonia sp. d'Archiac and de Verneuil 1841 snail
Ostracoda
 Podocopa -
Palaeocopida indet.
Palaeocopida indet. Henningsmoen 1953 ostracod
including 5 "reticulate" palaeocopes
Trilobita
 Asaphida - Asaphidae
Opsimasaphus sp.
Opsimasaphus sp. Kielan 1960 trilobite
 Corynexochida - Illaenidae
Illaenidae indet., Stenopareia sp.
Illaenidae indet. Hawle and Corda 1847 trilobite
illaenid
Stenopareia sp. Holm 1886 trilobite
 Phacopida - Dalmanitidae
Mucronaspis sp.
Mucronaspis sp. Destombes 1963 trilobite
 Phacopida - Calymenidae
Calymenidae indet., Gravicalymene sp.
Calymenidae indet. Milne-Edwards 1840 trilobite
calymenid
Gravicalymene sp. Shirley 1936 trilobite