Dounans Limestone, Lime Craig Quarry (Ordovician of the United Kingdom)

Where: Scotland, United Kingdom (56.0° N, 4.0° W: paleocoordinates 27.1° S, 36.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Zone J (Pseudocybele nasuta) trilobite zone, Dounans Limestone Formation, Cassinian (478.6 - 468.1 Ma)

• Listed as Late Canadian, Cassinian. Ethington & Austin (1991) put this in Zone J

• formation-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lithified, calcareous mudstone

• Shelf margin (suggestive of Fortey's illaenid-cheirurid association) or outer shelf fine-grained lime muds
• Calcilutite

Size classes: macrofossils, mesofossils

Collection methods: 7500 kgs of raw rock collected from quarry scree

Primary reference: J. K. Ingham, G. B. Curry, and A. Williams. 1986. Early Ordovician Dounans Limestone fauna, Highland Border Complex, Scotland. Earth Sciences 76:481-513 [P. Novack-Gottshall/P. Hearn/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 75589: authorized by Phil Novack-Gottshall, entered by Paul Hearn on 18.10.2007, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

 Corynexochida - Illaenidae
Illaenus aff. oscitatus Fortey 1980 trilobite
 Odontopleurida - Odontopleuridae
Ceratocephala sp. Warder 1838 trilobite
 Phacopida - Cheiruridae
Sycophantia aff. seminosa Fortey 1980 trilobite
Kawina sp. Barton 1916 trilobite
Heliomeroides sp. Evitt 1951 trilobite
 Phacopida - Pliomeridae
Strotactinus sp. Bradley 1925 trilobite
or Ectenonotus
 Ptychopariida - Catillicephalidae
Distazeris adoceta trilobite
Table tabulates
 Proetida - Dimeropygidae
Ischyrotoma stubblefieldi Ingham 1986 trilobite
 Proetida - Telephinidae
Carolinites cf. genacinaca Ross 1951 trilobite
 Proetida - Bathyuridae
Bathyuridae indet. Walcott 1886 trilobite
"Goniotelina aff. williamsi" = Acidiphorus williamsi Ross 1951 trilobite
 Pentamerida - Syntrophiidae
Syntrophiidae indet. Schuchert 1896
"Conjoined or isolated valves and fragments"
 Pentamerida - Camerellidae
Idiostrophia sp. Ulrich and Cooper 1936
"Conjoined or isolated valves and fragments"
Camerella sp. Billings 1859
"Conjoined or isolated valves and fragments"
 Orthida -
Orthida "indet. sp.1" Schuchert and Cooper 1932
"Conjoined or isolated valves and fragments"
Orthida "indet. sp.2" Schuchert and Cooper 1932
"Conjoined or isolated valves and fragments"
 Orthida - Archaeorthidae
Nothorthis sp. Ulrich and Cooper 1938
"Conjoined or isolated valves and fragments"
Archaeorthis sp. Schuchert and Cooper 1931
"Conjoined or isolated valves and fragments"
 Orthida - Hesperonomiidae
Hesperonomiidae indet. Ulrich and Cooper 1936
"Conjoined or isolated valves and fragments"
 Orthida - Orthidae
Orthambonites sp. Pander 1830
"Conjoined or isolated valves and fragments"
 Orthida - Orthidiellidae
Orthidium sp. Hall and Clarke 1892
"Conjoined or isolated valves and fragments"
Gastropoda indet. Cuvier 1797 snail
 Euomphalina - Macluritidae
cf. Maclurites sp. Le Sueur 1818 snail
 Bellerophontida - Sinuitidae
cf. Cyrtodiscus sp. Perner 1903 snail
 Murchisoniina - Straparollinidae
Straparollinidae sp. Wagner 1999 snail
 Murchisoniina - Murchisoniidae
cf. Murchisonia sp. d'Archiac and de Verneuil 1841 snail
 Murchisoniina - Subulitidae
cf. Subulites sp. Emmons 1842 snail
 Endoceratoidea -
Endoceratoidea indet. Teichert 1933
 Trepostomata -
Trepostomata indet. Ulrich 1882
 Conodontophorida -
 Panderodontida - Panderodontidae
Parapanderodus cornuformis conodont
comuform element - 6 specimens; scandodontiform element - 1 specimens Parapanderodus striatus
 Ozarkodinida -
Periodon flabellum conodont
Sb element - 1 specimen; Pa element - 1 specimen
Scandodus brevibasis conodont
oistodontiform element - 1 specimen; distacodontifom element - 1 specimen; drepanodontiform element - 3 specimens
 Protopanderodontida -
Drepanoistodus sp. Lindstrom 1971 conodont
erect element - 1 specimen
 Protopanderodontida - Protopanderodontidae
Eucharodus parallelus Branson and Mehl 1933 conodont
3 specimens
 Teleostei -
Incertae indet. Brito and Gallo 2002
Crinoidea indet. Miller 1821 Sea lily