Santa Clara Formation (Triassic of Mexico)

Where: Sonora, Mexico (28.6° N, 109.7° W: paleocoordinates 3.3° N, 46.9° W)

• coordinate estimated from map

• local area-level geographic resolution

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

• 37 beds collected

• formation-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine

• The Santa Clara Formation is consistes of a sequence of fluvial and lacustrine sediments with occasional coastal and marine influence. Described better in (Potter and Cojan, 1985; Vassallo, 1985)

Size class: macrofossils

Preservation: mold/impression, adpression

Collection methods: quarrying, surface (in situ), mechanical,

• This entry summarizes the 37 Zambrano-Garcia and Weber entries from this paper. Some overlap of entries with Weber et al. (1980)

Primary reference: A. Zambrano Garcia and R. Weber. 1985. Nuevo ensayo de un panorama de la paleoecologia de comunidades de la tafoflora Santa Clara (Triasico Tardio, Sonora). III Congreso Latinoamericano de Paleontologia. Mexico. Simposio sobre Floras del Triasico Tardio, Su Fitogeografia y Paleoecologia. Memoria 153-163 [A. Rees/D. Sunderlin/S. Bruning]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 24092: authorized by Allister Rees, entered by Dave Sunderlin on 30.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
 Coniferales -
Desmiophyllum sp., Desmiophyllum poleoensis
Desmiophyllum sp. Lesquereux 1878
 Coniferales - Podocarpaceae
Elatocladus carolinensis, Elatocladus sp.
Elatocladus sp. Halle 1913 podocarp
 Bennettitales -
Cycadolepis wettsteini, Weltrichia sp., Zamites sp., Zamites fragilis, Zamites aff. macombii, Zamites ex gr. fragilis, Zamites aff. powelli, Zamites cf. truncatus, ? Pterophyllum sp., Williamsonia sp.
Weltrichia sp. Braun 1843
Zamites sp. Brongniart 1828
Zamites aff. powelli Fontaine 1890
Zamites cf. truncatus Zeiller 1903
? Pterophyllum sp. Brongniart 1828
Williamsonia sp. Carruthers 1870
Cordaitopsida
  - Cordaitaceae
Noeggerathiopsis sp.
Noeggerathiopsis sp. Feistmantel 1879
Cycadopsida
 Cycadales -
Taeniopteris elegans
 Cycadales - Cycadaceae
"Pterophyllum robustum" = Ctenophyllum robustum, Ctenophyllum braunianum
"Pterophyllum robustum" = Ctenophyllum robustum Emmons 1857 cycads
Ctenophyllum braunianum Göppert 1844 cycads
Macrotaeniopteris
  -
Macrotaeniopteris sp.
Macrotaeniopteris sp. Schimper 1869
Macropterygium
  -
Macropterygium sp.
Macropterygium sp. Schimper 1870
Aphlebia
  -
Aphlebia sonorensis
Polypodiopsida
 Marattiales - Marattiidae
"Pecopteris falcatus" = Asterocarpus falcatus, Mertensides spp., Asterotheca santaclarae, Asterotheca ex gr. santaclarae
"Pecopteris falcatus" = Asterocarpus falcatus Emmons 1856
Mertensides spp. Fontaine 1883
 Equisetales - Equisetidae
? Phyllotheca sp.
? Phyllotheca sp. Brongniart 1828
  -
Cladophlebis mexicana, ? Cladophlebis spp.
? Cladophlebis spp. Brongniart 1849
 Gleicheniales - Polypodiidae
Phlebopteris smithii, Phlebopteris angustiloba
Pteropsida
 Filicinae -
Alethopteris whitneyi
Alethopteris whitneyi Newberry 1876
Cynepteris
  -
Cynepteris spp.
Cynepteris spp. Ash 1969