Where: Coconino County, Arizona (35.2° N, 111.6° W: paleocoordinates 9.2° N, 36.6° W)
• coordinate estimated from map
• local area-level geographic resolution
When: "Alpha" Member (Kaibab Formation), Roadian (272.3 - 268.8 Ma)
• Bed is 4.5 feet thick; forms irregular slope or cliff
• group of beds-level stratigraphic resolution
Environment/lithology: shallow subtidal; dolomitic, shelly/skeletal, yellow, silty limestone
Size class: macrofossils
Preservation: mold/impression
Primary reference: H. Chronic. 1952. Molluscan fauna from the Permian Kaibab Formation, Walnut Canyon, Arizona. Geological Society America Bulletin 63(2):95-166 [D. Bottjer/M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 39998: authorized by David Bottjer, entered by Matthew Clapham on 13.06.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Gastropoda "Genus and species indet. 1" Cuvier 1795 snail | |
"Ananias gibber n. sp." = Glabrocingulum (Glabrocingulum) gibber, Glabrocingulum laeviliratum, "? Mourlonia cancellata" = Ptychomphalina cancellata
"Ananias gibber n. sp." = Glabrocingulum (Glabrocingulum) gibber Chronic 1952 snail
Glabrocingulum laeviliratum Chronic 1952 snail
"? Mourlonia cancellata" = Ptychomphalina cancellata Chronic 1952 snail | |
Strianematina pulchrelirata n. gen. n. sp.
Strianematina pulchrelirata n. gen. n. sp. Chronic 1952 snail | |
Stegocoelia quadricostata n. sp.
Stegocoelia quadricostata n. sp. Chronic 1952 snail | |
"Retispira undulata" = Retispira modesta, Bellerophon deflectus
"Retispira undulata" = Retispira modesta Girty 1909 snail
Bellerophon deflectus Chronic 1952 snail | |
Euphemites aequisulcatus Chronic 1952 snail | |
Naticopsis sp. M'Coy 1844 snail | |
Euomphalus kaibabensis Chronic 1952 snail | |
Bivalvia | |
"Palaeonucula levatiformis" = Nuculavus levatiformis
"Palaeonucula levatiformis" = Nuculavus levatiformis Walcott 1884 nut clam | |
Astartella subquadrata Girty 1909 clam | |
"Allorisma terminale" = Wilkingia terminale
"Allorisma terminale" = Wilkingia terminale Hall 1852 clam | |
"Pleurophorus albequus" = Permophorus albequus
"Pleurophorus albequus" = Permophorus albequus Beede 1907 clam | |
Promytilus retusus Chronic 1952 mussel | |
"Grammatodon politus" = Grammatodon (Cosmetodon) politus
"Grammatodon politus" = Grammatodon (Cosmetodon) politus Girty 1908 clam | |
Aviculopecten kaibabensis Newell 1938 scallop | |
Tergomya | |
cf. Lepetopsis sp. Whitfield 1882 |