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 (477.7 - 473.8 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):979-1026 [A. Miller/R. Krause/P. Wagner]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

Show authors, comments, and common names
Trilobita
 Asaphida - Asaphidae
Merlinia murchisoniae
Merlinia murchisoniae Murchison 1839 trilobite
 Phacopida - Calymenidae
Neseuretus ramseyensis
Neseuretus ramseyensis Hicks 1873 trilobite
Bivalvia
 Colpomyida - Colpomyidae
Xestoconcha sp., Eurymya sp.
Xestoconcha sp. Pojeta and Gilbert-Tomlinson 1977 clam
Eurymya sp. Ulrich 1894 clam
 Myalinida - Ambonychiidae
Cleionychia sp.
Cleionychia sp. Ulrich 1892 clam
 Ostreida - Pterineidae
Palaeopteria sp.
Palaeopteria sp. Whiteaves 1897 oyster
 Arcida - Parallelodontidae
Glyptarca serrata n. sp.
Glyptarca serrata n. sp. clam
 Cyrtodontida - Cyrtodontidae
Cyrtodonta cf. staffordae, Cyrtodonta cf. wattii, Cyrtodontula cf. hadzeli
Cyrtodonta cf. staffordae Pojeta and Gilbert-Tomlinson 1977 clam
Cyrtodonta cf. wattii Tate 1896 clam
Cyrtodontula cf. hadzeli Pojeta and Gilbert-Tomlinson 1977 clam
 Cyrtodontida - Falcatodontidae
Falcatodonta costata n. gen. n. sp.
Falcatodonta costata n. gen. n. sp. clam
 Actinodontida - Cycloconchidae
Carminodonta crossi n. gen. n. sp., Fortowensia grandis n. gen. n. sp., Celtoconcha foveata n. gen. n. sp.
Carminodonta crossi n. gen. n. sp. clam
Fortowensia grandis n. gen. n. sp. clam
Celtoconcha foveata n. gen. n. sp. clam
 Actinodontida - Redoniidae
Moridunia simplicidens n. gen. n. sp.
Moridunia simplicidens n. gen. n. sp. Cope 1996 clam
 Cardiidia - Grammysiidae
Arenigomya carinata n. gen. n. sp.
Arenigomya carinata n. gen. n. sp. clam
 Modiomorphida - Modiomorphidae
Modiolopsis "sp. A", Modiolopsis "sp. B", "Goniophora (Cosmogoniophora) extensa n. sp." = Goniophora (Cosmogoniophora), Parallelodus dyfedensis n. sp.
Modiolopsis "sp. A" Hall 1847 clam
Modiolopsis "sp. B" Hall 1847 clam
"Goniophora (Cosmogoniophora) extensa n. sp." = Goniophora (Cosmogoniophora) clam
 Solemyida - Solemyidae
Ovatoconcha fragilis n. gen. n. sp.
Ovatoconcha fragilis n. gen. n. sp. Awning Clam
 Nuculida - Praenuculidae
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
Rostroconchia
 Ribeirioida - Technophoridae
Ribeiria complanata
Ribeiria complanata Salter 1859
Anthozoa
 Gorgonacea -
Petilavenula varifurcata n. gen. n. sp.
Petilavenula varifurcata n. gen. n. sp. Cope 2005 gorgonian