AMNH1067, Little Colorado River canyon (Permian of the United States)

Where: Arizona (34.4° N, 109.3° W: paleocoordinates 7.6° N, 35.5° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Alpha Member (Kaibab Formation), Roadian (272.3 - 268.8 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: lagoonal or restricted shallow subtidal; lithified limestone

• Calcitic limestone just above 6-foot marly shale

Size class: macrofossils

Preservation: replaced with silica

Primary reference: R. L. Batten. 1964. Some Permian Gastropoda from eastern Arizona. American Museum Novitates 2165:1-16 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 94884: authorized by Matthew Clapham, entered by Matthew Clapham on 31.03.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Trigoniida - Schizodidae
Schizodus canalis, Schizodus texanus
Schizodus canalis Branson 1930 clam
Schizodus texanus Clifton 1942 clam
Gastropoda
 Euomphalina - Euomphalidae
? Planotectus sp.
? Planotectus sp. Yochelson 1956 snail
 Murchisoniina - Gosseletinidae
Bradyospira johnsensis n. gen. n. sp., "Glabrocingulum (Glabrocingulum) coronatum" = Glabrocingulum coronatum
Bradyospira johnsensis n. gen. n. sp. Batten 1964 snail
"Glabrocingulum (Glabrocingulum) coronatum" = Glabrocingulum coronatum Chronic 1952 snail
 Cerithimorpha - Orthonemidae
"Goniasma geminocarinata" = Donaldospira geminocarinata
"Goniasma geminocarinata" = Donaldospira geminocarinata Chronic 1952 snail
 Caenogastropoda - Meekospiridae
? Meekospira sulcata n. sp., Girtyspira sp.
? Meekospira sulcata n. sp. Batten 1964 snail
Girtyspira sp. Knight 1936 snail
 Caenogastropoda - Orthonematidae
Orthonema sp.
Orthonema sp. Meek and Worthen 1862 snail