GSC 26406, Lyall River, Grinnell Peninsula, Devon Island (Permian of Canada)

Where: Nunavut, Canada (77.0° N, 95.4° W: paleocoordinates 37.2° N, 0.2° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Assistance Formation, Roadian (272.3 - 268.8 Ma)

• Collection between 45 and 57 m above base of formation

• group of beds-level stratigraphic resolution

Environment/lithology: offshore shelf; lithified, glauconitic, gray sandstone and lithified, bioturbated, concretionary, hematitic, silty limestone

• 200 ft. of dark grey recessive sandstone and minor resistant silty limestone bands that are iron rich, concretionary, and contain and abundance of plant and animal debris. Unconsolidated glauconitic sandy clay and sand, locally with siderite and sandstone concretions.

Size class: macrofossils

Preservation: replaced with other

Reposited in the GSC

Primary reference: P. Harker and R. Thorsteinsson. 1960. Permian rocks and faunas of Grinnell Peninsula, Arctic Archipelago. Geological Survey of Canada Memoir 309:1-89 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 11089: authorized by Arnold Miller, entered by Chad Ferguson on 13.07.2001, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Scyphozoa
 Conulariida - Conulariidae
Paraconularia arctica n. sp.1 Babcock 1988 jellyfish
Paraconularia margaritae n. sp.1 Babcock 1988 jellyfish
Cephalopoda
 Goniatitida - Mongoloceratidae
Biarmiceras sp.6 Leonova et al. 2005 ammonite
 Goniatitida - Paragastrioceratidae
"Pseudogastrioceras fortieri n. sp." = Daubichites fortieri
"Pseudogastrioceras fortieri n. sp." = Daubichites fortieri Harker 1960 ammonite
 Goniatitida - Spirolegoceratidae
Sverdrupites sp.8 Nassichuk 1970 ammonite
Sverdrupites harkeri n. sp.8 Ruzhentsev 1961 ammonite
Bivalvia
 Myalinida - Myalinidae
Myalinidae indet.7 Frech 1891 clam
 Pectinida - Deltopectinidae
Deltopecten sp.7, "Cyrtorostra arctica n. sp." = Cyrtorostra laticostata7
Deltopecten sp.7 Etheridge 1892 scallop
"Cyrtorostra arctica n. sp." = Cyrtorostra laticostata7 Nechaev 1894 scallop
 Pectinida - Aviculopectinidae
Aviculopecten sp.7 M'Coy 1851 scallop
 Pectinida - Limipectinidae
Acanthopecten sp.7 Girty 1903 scallop
 Ostreida - Bakevelliidae
Bakevellia sp.7 King 1848 oyster
 Pholadomyida - Edmondiidae
Edmondia sp.7 de Koninck 1841 clam
 Cardiida - Kalenteridae
Stutchburia sp.7 Etheridge 1900 clam
Permophorus sp.7 Chavan 1954 clam
 Trigoniida - Schizodidae
Schizodus sp.7 King 1844 clam
Scaphopoda
 Dentaliida - Prodentaliidae
Prodentalium belcheri n. sp.10 Nassichuk and Hodgkinson 1976 tusk shell
Strophomenata
 Orthotetida - Schuchertellidae
"Streptorhynchus kempei" = Arctitreta kempei, "Streptorhynchus triangularis" = Arctitreta triangularis
"Streptorhynchus kempei" = Arctitreta kempei Andersson 1914
"Streptorhynchus triangularis" = Arctitreta triangularis Wiman 1914
 Orthotetida - Derbyiidae
Derbyia cf. grandis Waagen 1884
 Strophomenida - Rugosochonetidae
"Chonetes capitolinus" = Brachiosvalbardia capitolina
"Chonetes capitolinus" = Brachiosvalbardia capitolina Toula 1875
 Productida - Echinoconchidae
 Productida - Productidae
"Kochiproductus freboldi" = Kochiproductus porrectus, "Muirwoodia mammatus" = Yakovlevia mammata
"Kochiproductus freboldi" = Kochiproductus porrectus Kutorga 1844
"Muirwoodia mammatus" = Yakovlevia mammata Keyserling 1846
 Productida - Productellidae
"Thuleproductus arcticus" = Thamnosia arctica11
"Thuleproductus arcticus" = Thamnosia arctica11 Whitfield 1908
 Productida - Monticuliferidae
"Cancrinella cf. germanicus" = Costatumulus germanicus
"Cancrinella cf. germanicus" = Costatumulus germanicus Frebold 1933
Rhynchonellata
 Rhynchonellida - Stenoscismatidae
Septacamera opitula n. sp.3 Grant 1971
 Rhynchonellida - Rhynchoporidae
Rhynchopora cf. nikitini Tschernyschew 1889
 Spiriferida - Strophopleuridae
Pterospirifer cf. alatus von Schlotheim 1813
 Spiriferida - Spiriferidae
"Spirifer osborni n. sp." = Brachiokasakhstania osborni
"Spirifer osborni n. sp." = Brachiokasakhstania osborni Harker 1960
 Spiriferida - Spiriferellidae
Spiriferella loveni13 Diener 1903
Timaniella harkeri12 Waterhouse 1971
 Spiriferida - Trigonotretidae
"Gobbettifera angulata n. gen. n. sp." = Fasciculatia angulata5
"Gobbettifera angulata n. gen. n. sp." = Fasciculatia angulata5 Waterhouse 2004
 Spiriferida - Elythidae
"Neophricadothyris "sp. B"" = Phricodothyris2
"Neophricadothyris "sp. B"" = Phricodothyris2 George 1932
 Athyridida - Athyrididae
 Terebratulida - Dielasmatidae
Dielasma cf. plica Kutorga 1842
Lingulata
 Lingulida - Lingulidae
Lingula freboldi2 Gobbett 1963
 Lingulida - Discinidae
Orbiculoidea jangarensis4 Ustritsky 1960
Chondrichthyes
  -
Physonemus sp.9 Agassiz 1843 elasmobranch