TRILOBITES OF THE SURVEY PEAK, OUTRAM, and SKOKI FORMATIONS:

 

 

Survey Peak Formation, Outram Formation, and Skoki Formation, Wilcox Pass, Jasper National Park, Rocky Mountains, Alberta, Canada:

 

Trilobites:

 

Geragnostus (Micragnostus) chiushuensis (Kobayashi, 1931) Survey Peak Formation

Harpides sp. (see Dean, 1989) Outram Formation

Scotoharpes sp. (see Dean, 1989) Outram Formation

Carinocranium cariniferum Dean, 1989 Outram Formation, Zone J

Tesselacauda flabella Kobayashi, 1955 Survey Peak Formation, zone E

Cybelopsis speciosa Poulsen, 1927 Skoki Fm., Zone J.

Pseudocybele nasuta Ross, 1951 Outram Formation, Zone J

Protopliomerops? radiatus Kobayashi, 1955 Outram Formation, Zone J

Pliomeridius lacunatus Dean, 1989 Outram Formation, Zone J

Pliomerid gen. et sp. indet.1 (see Dean, 1989) Survey Peak Formation

Pliomerid gen. et sp. indet.2 (see Dean, 1989) Outram Formation

Apoplanias rejectus Lochman, 1964 Survey Peak Formation

Jujuyaspis borealis Kobayashi, 1955 Survey Peak Formation

Paenebetella convexa Kobayashi, 1955 Survey Peak Formation

Highgatella? cordilleri (Lochman, 1964) Survey Peak Formation, Missisquoia Zone and Zone A.

Plethometopus obtusus Rasetti, 1945 Survey Peak Formation

Hystricurus oculilunatus Ross, 1951 Survey Peak Formation, Zone E

Hystricurus cf. H. sp. A of Ross, 1951  Survey Peak Formation, Zone E

Hystricurus cf. H. sp. B of Ross, 1951 Survey Peak Formation, Zone E

Hystricurus sp. (see Dean, 1989) Survey Peak Formation, Zone E & F

Pseudohystricurus sp. (see Dean, 1989) Survey Peak Formation, Zone E

Hyperbolochilus cf. H. expansus Kobayashi, 1955 Survey Peak Formation, Zone E

Hyperbolochilus sp. (see Dean, 1989) Survey Peak Formation, Zone F

Metabowmania sp. (see Dean, 1989) Survey Peak Formation, Zone E

Hillyardina sp. (see Dean, 1989) Survey Peak Formation, Zone E

Goniotelina brevis (Hintze, 1953) Outram and Skoki Formations

Gonioteloides monoceros Kobayashi, 1955 Survey Peak Formation

Peltabellia sp. (see Dean, 1989) Outram Formation

Benthamaspis obrepta (Lochman, 1966) Outram Formation, Zone G

Benthamaspis canadensis Dean, 1989 Outram Formation, Zone J

Benthamaspis diminutiva Hintze, 1953 Outram and Skoki Formations, Zone J

Carolinites genacinaca Ross, 1951 Outram and Skoki Formations, Zone J [Carolinites genacinaca genacinaca Ross, 1951 (also in Skoki Fm.?), Outram Formation, Ibexian, (Blackhillsian), Zone J (Pseudocybele nasuta Zone)]

Carolinites aff. C. tasmaniensis (Etheridge, 1919) Outram Formation, Zone G

Leiostegium (Leiostegium) valmyense (Lochman, 1966) Survey Peak Formation

Leiostegium (Evansaspis) ceratopygoides (Raymond, 1925) Survey Peak Formation, Zone E

Missisquoia typicalis Shaw, 1951 Survey Peak Formation

Missisquoia enigmatica (Kobayashi, 1955) Survey Peak Formation

Missisquoia sp. (see Dean, 1989) Survey Peak Formation

Kainella billingsi (Walcott, 1924) Survey Peak Formation, Zone D

Kainella flagricauda (White, 1874) Survey Peak Formation

Apatokephaloides clivosus Raymond, 1924 Survey Peak Formation

Apatokephalus finalis (Walcott, 1884) (maybe in the Survey Peak Formation?)

Apatokephalus sp. (see Dean, 1989) Outram Formation, Zone G

Apatokephalus? longifrons Dean, 1989 Survey Peak Formation, Zone D & E

Menoparia elegans Dean, 1989 Outram Formation, Zone G

Ischyrotoma cf. I. caudanodosa (Ross, 1951) Outram and Skoki Formations, Zone J = Dimeropygiella cf. caudanodosa

Dimeropygiella cf. caudanodosa of Dean (1989) (formerly Ischyrotoma cf. caudata) (see Adrain et al., 2001), Outram Formation, Ibexian, (Blackhillsian), Zone J (Pseudocybele nasuta Zone)

Ischyrotoma cf. I. eos (Kobayashi, 1955) Survey Peak Formation, Zone E [Ischyrotoma cf. eos (neither Ischyrotoma nor Dimeropygiella still needs work) (see Adrain et al., 2001), Survey Peak Formation, Ibexian, (Stairsian), Zone E (Tesselacauda Zone)]

Corbinia horatio Walcott, 1924 Survey Peak Formation, Saukia Zone

Aulacoparia (Aulacoparia ) sculpta Dean, 1989 Outram Formation, Zone G

Kobayashia cf. K. douglasensis (Walcott, 1925) (see Dean, 1989) Outram Formation, Zone G

Isoteloides saxosimontis Dean, 1989 Outram and Skoki Formations, Zone J

Lachnostoma latucelsum Ross, 1951 Outram Formation, Zone J (also in Skoki Fm.?)

Presbynileus (Presbynileus ) latifrons Dean, 1989 Outram and Skoki Formations, Zones G, I, J

Ptyocephalus declivitus (Ross, 1951) Outram and Skoki Formations, Zone J

Ptyocephalus acclivus (Hintze, 1953) Outram Formation, Zone J

Trigonocerca ? sp. (see Dean, 1989) Outram Formation, Zone G

Megistaspis (Ekeraspis?) sp. (see Dean, 1989) Outram Formation, Zone G

Niobella sp. (see Dean, 1989) Outram Formation, Zone G

Symphysurina walcotti Kindle, 1929 Survey Peak Formation, Zone A

Symphysurina spicata Ulrich in Walcott, 1925 Survey Peak Formation, Zone A and Missisquoia Zone

Symphysurina sp. (see Dean, 1989) Survey Peak Formation, Zone A and Missisquoia Zone

Bellefontia nonius Walcott, 1925 Survey Peak Formation, Zone B

Parabellefontia concinna Hintze, 1953 Survey Peak Formation

Unassigned asaphid hypostoma A-E (see Dean, 1989) mostly Outram Formation, Zone G, J

Clelandia albertensis Norford, 1969 Survey Peak Formation, Zone A

Clelandia sp. (see Dean, 1989) Survey Peak Formation, Zone A

Pseudoclelandia cornupsittaca Ross, 1951 Survey Peak Formation, Zone F

Pseudoclelandia fluxafissura Ross, 1951 Survey Peak Formation, Zone E

Gen. et sp. indet. A (see Dean, 1989)

Gen. et sp. indet. B (see Dean, 1989)

Gen. et sp. indet. C (see Dean, 1989)

Gen. et sp. indet. D (see Dean, 1989)

Gen. et sp. indet. E (see Dean, 1989)

Gen. et sp. indet. F (see Dean, 1989)

 

 

COMMENTS:

 

    The Survey Peak Formation, Outram Formation, and Skoki Formation outcrop in the Rocky Mountains in Jasper National Park in the Alberta-British Columbia border area. Almost all known outcrops are in Canada's Rocky Mountain Parks, so collecting is forbidden.

    The trilobites in these 3 formations include a diverse fauna of about 48 genera. They range in age from the Upper Cambrian (Trempealeau Series) to the Lower Ordovician (Ibex Series). The zones range (from oldest) from the Saukia Zone, up through the Missisquoia Zone, to Zone A through to Zone J (of the Ibexian of Utah).

 

 

REFERENCES:

 

Adrain, J. A., Westrop, S. A., Landing, E., and Fortey, R. A. (2001)  Systematics of the Ordovician trilobites Ischyrotoma and Dimeropygiella, with species from the type Ibexian area, western U.S.A. Journal of Paleontology, Vol. 75, No. 5, pp. 947-971.

 

Dean, W. T. (1988)  Lower Ordovician trilobites from the uppermost McKay Group at its type section, southeastern British Columbia. In Contributions to Canadian Paleontology, Geological Survey of Canada, Bulletin 379, p. 1-15.

Dean, W. T. (1989)  Trilobites from the Survey Peak, Outram, and Skoki Formations (Upper Cambrian) Lower Ordovician) at Wilcox Pass, Jasper National Park, Alberta. Geological Survey of Canada, Bulletin 389, 141 pp.

McCormick, T and Fortey, R. A. (1999) The most widely distributed trilobite species: Ordovician Carolinites genacinana. Journal of Paleontology, Vol. 73, pp. 202-218.


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