King 20, Beds 5,7, Cerro Wencelao to El Indio, Las Delicias (Permian of Mexico)

Where: Coahuila, Mexico (26.4° N, 102.9° W: paleocoordinates 1.8° S, 34.7° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: La Difunta Formation, Capitanian (264.3 - 259.5 Ma)

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

• The Permian rocks are folded in a syncline, and western limb is referred to as the Difunta flank. The strata in the Difunta flank dip to the east at an average angle of 45 degrees.
• Black shale containing abundant concretions of hard black limestone, many of which have nuclei of ammonoids and other fossils (from section description, p. 13). Black concretionary shale, with persistent limestone layers in lower part in southern portion of area. Beds 4 to 7 (From a general stratigraphy table, Fig. 3, p. 19).

Size class: macrofossils

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: paleoecologic analysis

PaleoDB collection 62907: authorized by Tom Olszewski, entered by Leigh Fall on 01.08.2006, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Foraminifera
 Fusulinoidea - Schwagerinidae
Polydiexodina capitanensis
Polydiexodina capitanensis Dunbar and Skinner 1931
 Fusulinoidea - Ozawainellidae
Rauserella erratica n. gen. n. sp.
Rauserella erratica n. gen. n. sp. Dunbar 1944
Lingulata
 Lingulida - Discinidae
Orbiculoidea ovalis n. sp.1
Orbiculoidea ovalis n. sp.1 Cloud 1944
Strophomenata
 Productida -
Prorichthofenia sp.
 Strophomenida - Chonetidae
"Chonetes" deliciasensis
Rhynchonellata
 Athyridida - Neoretziidae
Hustedia mexicana
Hustedia mexicana Haack 1915
 Rhynchonellida - Paranorellidae
Paranorella imperialis
 Rhynchonellida - Petasmariidae
Leiorhynchoidea schucherti n. gen. n. sp., Leiorhynchoidea laevis, Leiorhynchoidea amygdaloidea2
Leiorhynchoidea schucherti n. gen. n. sp. Cloud 1944
Leiorhynchoidea amygdaloidea2 Cooper and Grant 1976
Pugnoides bisulcatus mexicanus, n. var.
 Spiriferida - Ambocoeliidae
"Crurithyris attenuata n. sp." = Attenuatella attenuata
"Crurithyris attenuata n. sp." = Attenuatella attenuata Cloud 1944
Cephalopoda
 Nautilida - Grypoceratidae
Stearoceras sp.
Stearoceras sp. Hyatt 1893
 Pseudorthocerida - Spyroceratidae
Bitaunioceras coahuilense
 Prolecanitida - Medlicottiidae
Propinacoceras sp.
Propinacoceras sp. Gemmellaro 1887 ammonite
 Goniatitida - Paragastrioceratidae
Strigogoniatites kingi n. sp., "Pseudogastrioceras roadense" = Roadoceras roadense, "Pseudogastrioceras haacki" = Roadoceras haacki
Strigogoniatites kingi n. sp. Miller 1944 ammonite
"Pseudogastrioceras roadense" = Roadoceras roadense Böse 1919 ammonite
"Pseudogastrioceras haacki" = Roadoceras haacki Miller 1944 ammonite
 Goniatitida - Vidrioceratidae
"Stacheoceras toumanskyae" = Stacheoceras toumanskayae
"Stacheoceras toumanskyae" = Stacheoceras toumanskayae Miller and Furnish 1940 ammonite
 Goniatitida - Cyclolobidae
Timorites schucherti, Waagenoceras girtyi, Waagenoceras karpinskyi
Timorites schucherti Miller and Furnish 1940 ammonite
Waagenoceras girtyi Miller and Furnish 1940 ammonite
Waagenoceras karpinskyi Miller 1944 ammonite
 Goniatitida - Adrianitidae
"Adrianites dunbari" = Metacrimites dunbari
"Adrianites dunbari" = Metacrimites dunbari Miller and Furnish 1940 ammonite
 Ceratitida - Paraceltitidae
"Xenodiscites waageni n. gen. n. sp." = Cibolites waageni, "Cibolites mojsisovicsi n. sp." = Cibolites waageni, Paraceltites altudensis, Paraceltites rectangularis n. sp.
"Xenodiscites waageni n. gen. n. sp." = Cibolites waageni Miller and Furnish 1940 ceratite
"Cibolites mojsisovicsi n. sp." = Cibolites waageni Miller and Furnish 1940 ceratite
Paraceltites altudensis Böse 1919 ceratite
Paraceltites rectangularis n. sp. Miller 1944 ceratite
 Bactritida - Bactritidae
Bactrites mexicanus
Bactrites mexicanus Miller 1944
1Cloud 1944; 2Cooper and Grant 1976