Where: Coahuila, Mexico (26.4° N, 102.9° W: paleocoordinates 1.7° S, 34.6° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Las Delicias Formation, Capitanian (264.3 - 259.5 Ma)
• Brachiopods found suggest a Wordian–Capitanian age for the stratigraphic section studied herein, just as Wardlaw et al. (1979) reported for La Difunta unit. However, the presence of 15 common species with a Capitanian age along with the record of ammonoid Timorites from the upper part of Delaware Mountains and Mexico (Las Delicias Beds) (Miller, 1944; Wardlaw et al., 1979; Leonova, 2002) confirms that rocks of the Las Manuelas I section get a late-middle Permian age (Table 1). The stratigraphic location of the studied section allowed delimiting the age of the upper levels of La Difunta unit (Wardlaw et al., 1979) to the Capitanian.
• bed-level stratigraphic resolution
Environment/lithology: lithified limestone
Size class: macrofossils
Collection methods: Repository: Museo de Paleontología, Facultad de Ciencias, Universidad Nacional Autónoma de México
Primary reference: M. A. Torres-Martínez, D. P. Heredia-Jiménez, S. A. Quiroz-Barroso, P. Navas-Parejo, F. Sour-Tovar and S. A. Quiroz-Barragán. 2019. A Permian (late Guadalupian) brachiopod fauna from northeast Mexico and their paleobiogeographic affinities. Journal of South American Earth Sciences 92:41-55 [M. Clapham/M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 200253: authorized by Matthew Clapham, entered by Matthew Clapham on 24.03.2019
Creative Commons license: CC BY (attribution)
Taxonomic list
Strophomenata | |
Ramavectus sp. Stehli 1954
? Edriosteges sp. Muir-Wood and Cooper 1960 | |
? Anemonaria sp. Cooper and Grant 1969
Liosotella subquadrata Cloud 1944 | |
Probolionia sp. Cooper 1957 | |
Grandaurispina cf. bella Cooper and Grant 1975
Linoproductus cf. nasutus King 1931 | |
? Derbyia sp. Waagen 1884 | |
Rhynchonellata | |
Spiriferella sulcifer Shumard 1858 | |
Composita affinis Girty 1908
Composita parasulcata Cooper and Grant 1976
Composita cf. prospera Cooper and Grant 1976
Cleiothyridina sp. Buckman 1906 | |
Hustedia stataria Cooper and Grant 1976
Hustedia opsia Cooper and Grant 1976 | |
Reticulariina laxa Girty 1908 | |
Rhynchopora guadalupensis Cooper and Grant 1976 | |
Wellerella girtyi Cooper and Grant 1976 | |
Dielasma "sp. 2" King 1856
Plectelasma guadalupense Girty 1908 | |
Enteletes wordensis King 1931 |