Dan-Ian-y-Castell Farm, Llangynog (Ordovician of the United Kingdom)

Also known as Llyn-y-Llawr

Where: Wales, United Kingdom (51.8° N, 4.4° W: paleocoordinates 68.7° S, 20.2° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Bolahaul Member (Ogof Hen Formation), Moridunian (478.6 - 471.8 Ma)

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified, bioturbated, silty, conglomeratic mudstone

• "a close inshore environment"
• "interbedded siltstones and mudstones" with "thin stringers of conglomerate and occasional pebbles... Bioturbation is common and the rock is an intimate admixture of silt and clay fractions"; said to be "silty mudstones" by Cope 2005

Size class: macrofossils

Collection methods: National Museum of Wales, Cardiff

Primary reference: J. C. W. Cope. 1996. Early Ordovician (Arenig) bivalves from the Llangynog Inlier, South Wales. Palaeontology 39(4):979 [A. Miller/R. Krause/R. Krause]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 87601: authorized by Wolfgang Kiessling, entered by Madeleine Nimke on 20.03.2009, edited by John Alroy

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Phacopida - Calymenidae
 Asaphida - Asaphidae
Rostroconchia
 Ribeirioida - Technophoridae
Bivalvia
 Cyrtodontida - Falcatodontidae
Falcatodonta costata n. gen. n. sp.
Falcatodonta costata n. gen. n. sp. clam
 Cyrtodontida - Cyrtodontidae
Cyrtodonta cf. wattii Tate 1896 clam
Cyrtodonta cf. staffordae Pojeta and Gilbert-Tomlinson 1977 clam
Cyrtodontula cf. hadzeli Pojeta and Gilbert-Tomlinson 1977 clam
 Arcida - Parallelodontidae
Glyptarca serrata n. sp. clam
 Myalinida - Ambonychiidae
Cleionychia sp. Ulrich 1892 clam
 Ostreida - Pterineidae
Palaeopteria sp. Whiteaves 1897 oyster
 Colpomyida - Colpomyidae
Xestoconcha sp. Pojeta and Gilbert-Tomlinson 1977 clam
 Modiomorphida -
Fortowensia grandis n. gen. n. sp., Moridunia simplicidens n. gen. n. sp., Celtoconcha foveata n. gen. n. sp.
Fortowensia grandis n. gen. n. sp. clam
Moridunia simplicidens n. gen. n. sp. clam
Celtoconcha foveata n. gen. n. sp. clam
 Modiomorphida - Modiomorphidae
Modiolopsis "sp. A", Modiolopsis "sp. B", Parallelodus dyfedensis n. sp., "Goniophora (Cosmogoniophora) extensa n. sp." = Goniophora (Cosmogoniophora)
Modiolopsis "sp. A" Hall 1847 clam
Modiolopsis "sp. B" Hall 1847 clam
"Goniophora (Cosmogoniophora) extensa n. sp." = Goniophora (Cosmogoniophora) clam
 Modiomorphida -
Carminodonta crossi n. gen. n. sp. clam
Eurymya sp. Ulrich 1894 clam
 Pholadomyida -
Arenigomya carinata n. gen. n. sp.
Arenigomya carinata n. gen. n. sp. clam
 Solemyoida -
Ovatoconcha fragilis n. gen. n. sp.
Ovatoconcha fragilis n. gen. n. sp. clam
 Nuculida -
Paulinea parva n. gen. n. sp., Pensarnia laeviformis n. gen. n. sp.
Paulinea parva n. gen. n. sp. clam
Pensarnia laeviformis n. gen. n. sp. clam
Anthozoa
 Gorgonacea -
Petilavenula varifurcata n. gen. n. sp.
Petilavenula varifurcata n. gen. n. sp. Cope 2005 gorgonian