PBDB Collection

Fauna x, Section AV5, Delorme Fm., Mackenzie Mts. (Silurian of Canada)

Where: Northwest Territories, Canada (62.4° N, 127.0° W: paleocoordinates 6.2° N, 50.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Delorme Formation, Wenlock (433.4 - 427.4 Ma)

• Zonation based on conodonts present in AV sections 1, 2, and 4. (AV 3 and DR sections correlated with these on basis of trilobite faunal assemblages. I'm assuming AV5 can be correlated as well.) See PBDB ref. 7215. This fauna is between j (early Wenlock) and k (upper Wenlock/lower Ludlow).

• group of beds-level stratigraphic resolution

Environment/lithology: slope; argillaceous limestone and shale

• Grand Cycle 3.

•SEP environmental call based primarily on PBDB ref. 7215.

• "...sequence of buff and light brown weathering, thinly bedded limestones, dolomites and shales that overlie the Whittaker Formation and underlie the Camsell Formation...The beds above and including a distinctive buff-brown shale unit in the sections near Avalanche Lake are included in the Delorme Formation in this work, although the lowest buff-brown shaly beds (below distinctive orange coloured limestones and dolomites) could be regarded as transitional between the Road River and Delorme..." (PBDB ref. 7215)

Preservation: replaced with silica

Primary reference: D. J. Siveter and B. D. E. Chatterton. 1996. Silicified calymenid trilobites from the Mackenzie Mountains, northwest Canada. Palaeontographica Abteilung A 239(1-3):43-60 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 26059: authorized by Michael Foote, entered by Michael Foote on 01.10.2002, edited by Melanie Hopkins

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Trilobita
Phacopida - Encrinuridae	sensu lato Struszia mccartneyi⁶, Struszia (Avalanchurus) lennoni n. sp.⁶, Encrinurus "sp. A"⁶, Mackenziurus reimeri n. gen. n. sp.⁵ sensu lato Struszia mccartneyi⁶ trilobite S. (s.l.) Struszia (Avalanchurus) lennoni n. sp.⁶ trilobite Encrinurus "sp. A"⁶ Emmrich 1844 trilobite Mackenziurus reimeri n. gen. n. sp.⁵ trilobite
Phacopida - Calymenidae	sensu lato Calymene cf. polgari, Diacalymene gabrielsi sensu lato Calymene cf. polgari Siveter and Chatterton 1996 trilobite C. (s.l.) Diacalymene gabrielsi Siveter and Chatterton 1996 trilobite
Proetida - Otarionidae	Cyphaspis lowei n. sp.¹ Cyphaspis lowei n. sp.¹ trilobite
Lichida - Lichidae	Dicranogmus lepidus³, Borealarges sp.⁴, Borealarges renodis⁴, Borealarges tuckerae⁴, Richterarges facetus n. sp.⁴ Dicranogmus lepidus³ Campbell and Chatterton 2006 trilobite Borealarges sp.⁴ Adrain 1994 trilobite Borealarges renodis⁴ Campbell and Chatterton 2007 trilobite Borealarges tuckerae⁴ Adrain 1994 trilobite Richterarges facetus n. sp.⁴ Campbell and Chatterton 2007 trilobite 58 - 60 m
Rostroconchia
Conocardiida - Bransoniidae	Mulceodens johnstoni n. sp.² Mulceodens johnstoni n. sp.² Caldwell and Chatterton 1995
Conocardiida - Pseudobigaleaidae	Nehedia tricarina n. sp.², Nehedia bergeraci n. sp.², Cassowarioides polgari n. sp.², Cassowarioides anisomorpha n. sp.² Nehedia tricarina n. sp.² Caldwell and Chatterton 1995 Nehedia bergeraci n. sp.² Caldwell and Chatterton 1995 Cassowarioides polgari n. sp.² Caldwell and Chatterton 1995 Cassowarioides anisomorpha n. sp.² Caldwell and Chatterton 1995
Rhynchonellata
Athyridida - Nucleospiridae	Nucleospira lentilca⁷ Nucleospira lentilca⁷ Havlicek 1990
Athyridida - Athyrididae	Didymothyris sp.⁷ Didymothyris sp.⁷ Rubel and Modzalevskaya 1967
Athyridida - Meristidae	Merista cuneatina⁷ Merista cuneatina⁷ Jin and Chatterton 1997
Spiriferida - Cyrtiidae	Hedeina sp.⁷ Hedeina sp.⁷ Boucot 1957
Spiriferida - Reticulariidae	Spirinella tureki⁷ Spirinella tureki⁷ Havlicek 1990
Atrypida - Atrypidae	Atrypa (Gotatrpa) variabilis⁷, Plectatrypa unicosta⁷ Atrypa (Gotatrpa) variabilis⁷ Johnson et al. 1976 Plectatrypa unicosta⁷ Zhang 1989
Atrypida - Atrypinidae	Gracianella rudicristata⁷ Gracianella rudicristata⁷ Jin and Chatterton 1997
Atrypida - Septatrypidae	Septatrypa zelia⁷, Atrypoidea linguata⁷ Septatrypa zelia⁷ Barrande 1879 Atrypoidea linguata⁷ von Buch 1834
Rhynchonellida - Trigonirhynchiidae	Hercotrema pentaforma⁷ Hercotrema pentaforma⁷ Lenz 1977
Pentamerida - Subrianidae	Conchidium microlocularis⁷ Conchidium microlocularis⁷ Johnson et al. 1976
Terebratulida -	Microbilobata avalanchensis⁷ Microbilobata avalanchensis⁷ Jin and Chatterton 1996
Strophomenata
Orthotetida - Chilidiopsidae	Morinorhynchus crispus⁷ Morinorhynchus crispus⁷ Lindström 1861
Strophomenida - Furcitellidae	Pentlandina harperi⁷, Pentlandina lamelliformis⁷ Pentlandina harperi⁷ Zhang 1989 Pentlandina lamelliformis⁷ Jin and Chatterton 1997
Strophomenida - Strophodontidae	"Brachyprion (Protomegastrophia) sp." = Megastrophia (Protomegastrophia)⁷, Pholidostrophia (Mesopholidostrophia) lamellosa⁷ "Brachyprion (Protomegastrophia) sp." = Megastrophia (Protomegastrophia)⁷ Caster 1939 Pholidostrophia (Mesopholidostrophia) lamellosa⁷ Zhang 1989

¹Adrain and Chatterton 1996; ²Caldwell and Chatterton 1995; ³Campbell and Chatterton 2006; ⁴Campbell and Chatterton 2007; ⁵Edgecombe and Chatterton 1990; ⁶Edgecombe and Chatterton 1993; ⁷Jin and Chatterton 1997