King 38, Bed 5, Malascachas section, Las Delicias (Permian of Mexico)

Where: Coahuila, Mexico (26.3° N, 102.9° W: paleocoordinates 2.3° S, 35.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Palo Quemado Formation, Roadian (272.3 - 268.8 Ma)

• Part of middle Guadalupe (Cherry Canyon-Word).

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified shale and lithified, concretionary limestone

• Dark shale with a 15-foot layer of yellow-brown lava and some graywacke in the middle. The shale contains abundant limestone concretions formed around ammonoids and other fossils (from section description, p. 10). Prominent limestone layers separated by shales; little igneous material present. Beds 4 to 8. Most important limestone member is bed 6, which caps Cerro Prieto Sur. Cephalopods abundant in shales (From a general stratigraphy table, Fig. 3, p. 19).

Size class: macrofossils

Reposited in the YPM

Primary reference: R. E. King. 1944. Geology, Part I of Geology and paleontology of the Permian area northwest of Las Delicias, southwestern Coahulia, Mexico. Geological Society of America Special Paper 52:3-33 [T. Olszewski/L. Fall/L. Fall]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 63055: authorized by Tom Olszewski, entered by Leigh Fall on 03.08.2006, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Strophomenata
 Productida -
Prorichthofenia sp.
 Productida - Linoproductidae
Cancrinella rugosa
Cancrinella rugosa Cloud 1944
Rhynchonellata
 Rhynchonellida - Paranorellidae
Paranorella imperialis
 Rhynchonellida - Petasmariidae
Leiorhynchoidea schucherti
Cephalopoda
 Prolecanitida - Medlicottiidae
"Medlicottia burckhardti" = Eumedlicottia burckhardti, "Medlicottia girtyi" = Neogeoceras girtyi
"Medlicottia burckhardti" = Eumedlicottia burckhardti Böse 1919 ammonite
"Medlicottia girtyi" = Neogeoceras girtyi Miller and Furnish 1940 ammonite
 Goniatitida - Paragastrioceratidae
"Pseudogastrioceras roadense" = Roadoceras roadense
"Pseudogastrioceras roadense" = Roadoceras roadense Böse 1919 ammonite
 Goniatitida - Thalassoceratidae
Epithalassoceras ruzencevi
Epithalassoceras ruzencevi Miller and Furnish 1940 ammonite
 Goniatitida - Vidrioceratidae
Stacheoceras gemmellaroi n. sp.
Stacheoceras gemmellaroi n. sp. Miller 1944 ammonite
 Goniatitida - Cyclolobidae
Waagenoceras dieneri, "Waagenoceras guadalupense" = Mexicoceras guadalupense
Waagenoceras dieneri Böse 1919 ammonite
"Waagenoceras guadalupense" = Mexicoceras guadalupense Girty 1909 ammonite
 Goniatitida - Adrianitidae
Pseudagathiceras spinosum n. sp., "Adrianites plummeri n. sp." = Metacrimites plummeri
Pseudagathiceras spinosum n. sp. Miller 1944 ammonite
"Adrianites plummeri n. sp." = Metacrimites plummeri Miller 1944 ammonite