Cooks Range, Mimbres Mountains (Ordovician of the United States)

Where: Luna County, New Mexico (31.8° N, 107.8° W: paleocoordinates 12.4° S, 91.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Rossaspis superciliosa small shelly zone, José Formation (El Paso Group), Demingian (485.4 - 478.6 Ma)

• correlates to high E or F zone of Hintze (1952); later papers say F.

•Note: this is NOT the true Jose Formation according to Taylor et al. 2004 (Paleoceanographic events and faunal crises recorded in the Upper Cambrian and Lower Ordovician of west Texas and southern New Mexico; Geological Society of America Field Guide 5).

• formation-level stratigraphic resolution

Environment/lithology: lithified, ooidal, black limestone

• black oolitic limestones, generally in thin layers, with some black nonoolitic limestone, some black layers with black pebbles, believed by the writer to be algal in orgin

Size class: macrofossils

Primary reference: R. H. Flower. 1968. Part I - Some El Paso guide fossils. New Mexico Institute of Mining and Technology Memoir 22(1):1-21 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 56479: authorized by Pete Wagner, entered by Pete Wagner on 18.11.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Corynexochida - Leiostegiidae
"Lloydia (Leiostegium) cf. manitouensis" = Leiostegium manitouensis
"Lloydia (Leiostegium) cf. manitouensis" = Leiostegium manitouensis Walcott 1925 trilobite
trilobite
 Asaphida - Asaphidae
Gastropoda
 Euomphalina - Macluritidae
"Bridgeina carinifera n. gen. n. sp." = Macluritella carinifera, "Bridgeina rotunda n. gen. n. sp." = Macluritella rotunda
"Bridgeina carinifera n. gen. n. sp." = Macluritella carinifera Flower 1968 snail
"Bridgeina rotunda n. gen. n. sp." = Macluritella rotunda Flower 1968 snail
 Murchisoniina - Subulitidae
"Hormotoma zelleri n. sp." = Eroicaspira zelleri
"Hormotoma zelleri n. sp." = Eroicaspira zelleri Flower 1968 snail