PBDB Collection

Alpha Boulder, Table Head (Ordovician of Canada)

Where: Newfoundland and Labrador, Canada (49.0° N, 57.8° W: paleocoordinates 58.4° S, 37.3° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Whiterockian (470.0 - 457.3 Ma)

• Boulder was deposited in a conglomerate from the Factory Cove Member of the Shallow Bay Formation (Cow Head Group) (see James and Stevens 1986, p. 114). It contains trilobite fauna believed to be correlative with the lower Table Head Formation (Whiterockian) in Newfoundland.

Environment/lithology: reef, buildup or bioherm; lithified, fine-grained, white limestone

• Authors state that "The pure, fine-grained, unbedded limestone of the boulder is suggestive of a reef-core rock."

• Boulder is "...white, fine-grained, irregularly-fracturing limestone...fossils occur in scattered patches, frequently close to calcite-filled geodes"

Size class: macrofossils

Collected by C. H. Kindle and H.B. Whittington in 1952, 1955; reposited in the GSC

Collection methods: mechanical,

Primary reference: H. B. Whittington. 1963. Middle Ordovician trilobites from Lower Head, western Newfoundland. Bulletin of the Museum of Comparative Zoology 129(1):1-118 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 104752: authorized by Melanie Hopkins, entered by Melanie Hopkins on 09.02.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

• Trilobites most common; brachiopods, gastropods and cephalopods occur but are not common.

Show authors, comments, and common names

Rhynchonellata
Orthida - Archaeorthidae	Pleurorthis sp. Pleurorthis sp. Cooper 1956 ID by G.A. Cooper
Pentamerida - Porambonitidae	? Porambonites sp. ? Porambonites sp. Pander 1830 ID by G.A. Cooper
Pentamerida - Camerellidae	Camerella sp. Camerella sp. Billings 1859 ID by G.A. Cooper
Trilobita
- Isocolidae	Isocolus dysdercus n. sp. Isocolus dysdercus n. sp. Whittington 1963 trilobite
Odontopleurida - Odontopleuridae	Ceratocephala exigua n. sp. Ceratocephala exigua n. sp. Whittington 1963 trilobite
Ptychopariida - Raymondinidae	"? Ischyrophyma sp." = Celmus, Ischyrophyma tuberculata n. sp., Glaphurus divisus n. sp. "? Ischyrophyma sp." = Celmus Angelin 1854 trilobite Ischyrophyma tuberculata n. sp. Whittington 1963 trilobite Glaphurus divisus n. sp. Whittington 1963 trilobite
Asaphida - Remopleurididae	Remopleurides ligulus n. sp. Remopleurides ligulus n. sp. Whittington 1963 trilobite
Asaphida - Nileidae	Nileus affinis Nileus affinis Billings 1865 trilobite
Lichida - Lichidae	Apatolichas jukesi Apatolichas jukesi Billings 1865 trilobite
Corynexochida - Styginidae	Perischoclonus capitalis Perischoclonus capitalis Raymond 1925 trilobite
Corynexochida - Illaenidae	Illaenus "sp. 1", Illaenus "sp. 2", Illaenus spiculatus n. sp., Illaenus consobrinus, Illaenus tumidifrons, Illaenus bucculentus n. sp., Harpillaenus arcuatus Illaenus "sp. 1" Dalman 1827 trilobite Illaenus "sp. 2" Dalman 1827 trilobite Illaenus spiculatus n. sp. Whittington 1963 trilobite Illaenus consobrinus Billings 1865 trilobite Illaenus tumidifrons Billings 1865 trilobite Illaenus bucculentus n. sp. Whittington 1963 trilobite Harpillaenus arcuatus Billings 1865 trilobite
Phacopida - Cheiruridae	Lehua argus n. sp., Heliomeroides alacar n. sp., ? Kawina sp., "Cydonocephalus mercurius" = Kawina mercurius, "Cydonocephalus scrobiculus n. sp." = Kawina scrobiculus, Kawina vulcanus, Kawina arnoldi n. sp., "Cydonocephalus prolificus" = Kawina prolificus, "Cydonocephalus prominulus n. sp." = Kawina prominulus, Kawina limbata n. sp., "Cydonocephalus griphus n. sp." = Kawina griphus, "Cydonocephalus torulus n. sp." = Kawina torulus, Heliomera albata n. sp. Lehua argus n. sp. Whittington 1963 trilobite Heliomeroides alacar n. sp. trilobite ? Kawina sp. Barton 1916 trilobite "Cydonocephalus mercurius" = Kawina mercurius Billings 1865 trilobite "Cydonocephalus scrobiculus n. sp." = Kawina scrobiculus Whittington 1963 trilobite Kawina vulcanus Billings 1865 trilobite Kawina arnoldi n. sp. Whittington 1963 trilobite "Cydonocephalus prolificus" = Kawina prolificus Billings 1865 trilobite "Cydonocephalus prominulus n. sp." = Kawina prominulus Whittington 1963 trilobite Kawina limbata n. sp. Whittington 1963 trilobite "Cydonocephalus griphus n. sp." = Kawina griphus Whittington 1963 trilobite "Cydonocephalus torulus n. sp." = Kawina torulus Whittington 1963 trilobite Heliomera albata n. sp. Whittington 1963 trilobite
Phacopida - Pliomeridae	Ectenonotus sp., Pseudomera billingsi, Colobinion julius Ectenonotus sp. Raymond 1920 trilobite Pseudomera billingsi Whittington 1961 trilobite Colobinion julius Billings 1865 trilobite
Proetida - Bathyuridae	Uromystrum fraternum, Uromystrum formosum, Uromystrum patulum n. sp., "Bathyurellus nitidus" = Punka nitidus, "Goniotelus perspicator" = Acidiphorus, "Goniotelus sp." = Acidiphorus, "Goniotelus rostratus n. sp." = Acidiphorus rostratus, "Goniotelus kindlei n. sp." = Acidiphorus kindlei Uromystrum fraternum trilobite Uromystrum formosum trilobite Uromystrum patulum n. sp. Whittington 1963 trilobite "Bathyurellus nitidus" = Punka nitidus Billings 1865 trilobite "Goniotelus perspicator" = Acidiphorus trilobite "Goniotelus sp." = Acidiphorus Raymond 1925 trilobite "Goniotelus rostratus n. sp." = Acidiphorus rostratus Whittington 1963 trilobite "Goniotelus kindlei n. sp." = Acidiphorus kindlei Whittington 1963 trilobite
Proetida - Dimeropygidae	Ischyrotoma twenhofeli Ischyrotoma twenhofeli Raymond 1925 trilobite
Proetida - Proetidae	Phaseolops sepositus n. sp. Phaseolops sepositus n. sp. Whittington 1963 trilobite
Harpetida - Harpetidae	"Selenoharpes vitilis n. sp." = Scotoharpes vitilis "Selenoharpes vitilis n. sp." = Scotoharpes vitilis Whittington 1963 trilobite
Artiopoda
Agnostida - Metagnostidae	"Geragnostus clusus n. sp." = Trinodus clusus "Geragnostus clusus n. sp." = Trinodus clusus Whittington 1963
Idiorhapha solitaria
-	Idiorhapha solitaria Idiorhapha solitaria Billings 1865