San Marcial (Triassic of Mexico)

Where: Sonora, Mexico (28.5° N, 110.3° W: paleocoordinates 3.6° N, 47.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Santa Clara Formation, Carnian (237.0 - 228.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified lithology not reported

Size class: macrofossils

Collected by Remond

• Repository: Academy of Natural Sciences, Philadelphia (ANSP)

Primary reference: W. M. Gabb. 1864. Description of the Triassic fossils of California and the adjacent territories. Geological Survey of California Palaeontology 1:19-35 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 142640: authorized by Matthew Clapham, entered by Matthew Clapham on 15.04.2013, edited by Bethany Allen

Creative Commons license: CC BY (attribution)

Taxonomic list

• Associated with two or three other bivalves, one apparently a Cardium, too imperfect for description.
Polypodiopsida
 Marattiales - Marattiidae
Mertensides bullatus2 Bunbury 1847
Pteropsida
 Filicinae -
Alethopteris whitneyi2, "Cladophlebis roesserti" = Alethopteris roesserti2
Alethopteris whitneyi2 Newberry 1876
"Cladophlebis roesserti" = Alethopteris roesserti2 Presl 1838
Cycadopsida
 Cycadales - Cycadaceae
Ctenophyllum braunianum2 Göppert 1844 cycads
var. angustum
Taeniopteris magnifolia
  -
"Taeniopteris magnifolia" = Macrotaeniopteris magnifolia2
"Taeniopteris magnifolia" = Macrotaeniopteris magnifolia2 Rogers 1857
 Bennettitales -
Zamites truncatus2 Zeiller 1903
Zamites cf. megaphyllus2 Phillips 1871
Pterophyllum fragile2 Newberry 1876
Bivalvia
 Hiatellida - Hiatellidae
? Panopaea remondii n. sp. Gabb 1864 clam
 Trigoniida - Trigoniidae
Myophorigonia salasi1 de Cserna 1961 clam
 Nuculanida - Nuculanidae
Nuculana curvirostris1 de Cserna 1961 pointed nut clam