Upper Longhope Beds at May Hill inlier (Silurian of the United Kingdom)

Where: Wales, United Kingdom (52.0° N, 2.0° W: paleocoordinates 26.6° S, 12.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Upper Longhope Beds Formation, Ludlow (427.4 - 423.0 Ma)

• Listed as Upper Ludlovian

• formation-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lithified, calcareous siltstone and lithified limestone

• Grayish-olive to grayish-brown flaggy and shaly calcareous siltstones with thin limestone bands

Size classes: macrofossils, mesofossils

Primary reference: J. D. Lawson. 1955. The geology of the May Hill Inlier. Quarterly Journal of the Geological Society of London 111:85-116 [P. Novack-Gottshall/P. Novack-Gottshall]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 74805: authorized by Phil Novack-Gottshall, entered by Paul Hearn on 30.08.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Orthocerida - Orthoceratidae
 Orthocerida - Kionoceratidae
 Lituitida - Lituitidae
Lituites ibex
"Fairly common"
Gastropoda
 Murchisoniina - Phanerotrematidae
"Bembexia (Murchisonia) lloydi" = Ulrichospira lloydii
"Bembexia (Murchisonia) lloydi" = Ulrichospira lloydii de Sowerby and Murchison 1839 snail
"Present"
Bivalvia
 Ostreida - Pterineidae
Pterinea sp. Goldfuss 1832 oyster
"Present"
Pteronitella retroflexa oyster
"Fairly common"
 Lucinida - Mactromyidae
 Modiomorphida - Modiomorphidae
"Goniophora cymbaeformis" = Goniophora (Goniophora) cymbaeformis
"Goniophora cymbaeformis" = Goniophora (Goniophora) cymbaeformis Sowerby 1839 clam
"Fairly common"
 Modiomorphida - Allodesmatidae
 Cardiidia - Grammysiidae
Fuchsella (Orthonota) amygdalina Sowerby 1827 clam
"Fairly common"
 Solenida - Orthonotidae
Orthonota rigida clam
"Present"
 Nuculanida - Cucullellidae
Lophophorata
 Tentaculitida - Tentaculitidae
Tentaculites tenuis
"Fairly common"
Strophomenata
 Strophomenida - Chonetidae
Rhynchonellata
 Rhynchonellida - Trigonirhynchiidae
"Camarotoechia nucula" = Microsphaeridiorhynchus nucula
"Camarotoechia nucula" = Microsphaeridiorhynchus nucula Sowerby 1839
"Common"
 Orthida - Dalmanellidae
 Spiriferida - Delthyrididae
Delthyris elegans Muir-Wood 1925
"Present"
Craniata
 Craniopsida - Craniopsidae
Lingulata
 Lingulida - Discinidae
Orbiculoidea rugata
"Fairly common"
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
"Fairly common" "Polyzoan"
Gymnolaemata
 Ctenostomata - Ropalonariidae
Ropalonaria sp. Ulrich 1879
"Present" Originally Rhopalonaria, likely spelling error
Stenolaemata
 Trepostomida - Stenoporidae
Polychaeta
 Serpulimorpha -
Serpulites longissimus
"Fairly common"
Tentaculita
 Cornulitida - Cornulitidae
Cornulites serpularius
"Fairly common"
Eurypterida
 Eurypterida -
Eurypterida indet. Burmeister 1843 eurypterid
"Present"
Malacostraca
 Archaeostraca - Ceratiocarididae
Ceratiocaris sp. M'Coy 1849
"Present"
Ostracoda
 Palaeocopida - Beyrichiidae
Beyrichia torosa ostracod
"Fairly common"
Trilobita
 Phacopida - Calymenidae
Calymene intermedia trilobite
"Present"
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
"Common" [entered as Criniodea indet.]
Reptilia
 Squamata -
"Keilorites (Trachyderma) sp." = Heloderma
"Keilorites (Trachyderma) sp." = Heloderma Wiegmann 1829 beaded lizard
"Present"