UCMP D-5554, Murry Summit (Permian of the United States)

Where: Nevada (39.2° N, 115.0° W: paleocoordinates 13.8° N, 36.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Loray Formation, Kungurian (279.3 - 272.3 Ma)

• 365' (111 m) above base of Loray Fm

• group of beds-level stratigraphic resolution

Environment/lithology: lithified, calcareous siliciclastic sediments and lithified limestone

• The rocks containing this community are calcareous mudstone and siltstone and wackestones with a high proportion of clay and noncalcareous silt. The community is sometimes found in coarser grained muddy sandstone and packstone. The sediments are thin bedded and sometimes laminated.

Size class: macrofossils

Collected by T. Yancey, L. Plas, M. Kaasa

• Also included is 1 encrusting bryozoan (indiv.), 3 ostracod (indiv.),and 20 pentacrinoids (indiv.)

Primary reference: T. E. Yancey. 1978. Brachiopods and mollusca of the Lower Permian Arcturus Group, Nevada and Utah, Part 1: brachiopods, scaphopods, rostroconchs, and bivalves. Bulletins of American Paleontology 74(303):257-367 [P. Wagner/P. Wagner/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 10447: authorized by Tom Olszewski, entered by Melissa Gibson on 17.04.2001, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Ulvophyceae
 Bryopsidales - Codiaceae
Ivanovia sp.2
Ivanovia sp.2 Khvorova 1946
Sedentaria
 Sabellida - Serpulidae
Spirorbis sp.2
Spirorbis sp.2 Daudin 1800
Cephalopoda
 Pseudorthocerida - Pseudorthoceratidae
Pseudorthoceras sp.2
Pseudorthoceras sp.2 Girty 1912
Gastropoda
 Caenogastropoda - Meekospiridae
Meekospira sp.2
Meekospira sp.2 Ulrich and Scofield 1897 snail
 Caenogastropoda - Goniasmatidae
Goniasma sp.2
Goniasma sp.2 Tomlin 1930 snail
 Trochoidea -
Strianematina sp.2
Strianematina sp.2 Chronic 1952 snail
 Euomphalina - Euomphalidae
Leptomphalus sp.2
Leptomphalus sp.2 Yochelson 1956 snail
 Neritoidea - Naticopsidae
Naticopsis sp.2
Naticopsis sp.2 M'Coy 1844 snail
 Bellerophontida -
Bellerophontoidea indet.1
Bellerophontoidea indet.1 M'Coy 1851 snail
 Bellerophontida - Euphemitidae
Euphemites sp.2, Euphemitopsis sp.2
Euphemites sp.2 Warthin 1930 snail
Euphemitopsis sp.2 Yochelson 1960 snail
 Murchisoniina - Soleniscidae
Soleniscus sp.2
Soleniscus sp.2 Meek and Worthen 1860 snail
 Murchisoniina - Gosseletinidae
Ananias sp.2
Ananias sp.2 Knight 1945 snail
Bivalvia
 Nuculanida - Polidevciidae
Polidevcia sp.2
Polidevcia sp.2 Tschernyschev 1943 clam
 Nuculida - Nuculidae
Nuculavus sp.2
Nuculavus sp.2 Tschernyschev 1943 nut clam
 Cardiida - Kalenteridae
Permophorus sp.2
Permophorus sp.2 Chavan 1954 clam
 Trigoniida - Schizodidae
Schizodus sp.2
Schizodus sp.2 King 1844 clam
 Myalinida - Myalinidae
Myalina sp.2
Myalina sp.2 de Koninck 1842 clam
 Pectinida - Pseudomonotidae
Pseudomonotis sp.2
Pseudomonotis sp.2 von Beyrich 1862 scallop
Scaphopoda
 Dentaliida - Prodentaliidae
Prodentalium canna
Prodentalium canna White 1874 tusk shell
1Wagner 2023; 2Yancey and Stevens 1981