Winterpock area (Triassic of the United States)

Where: Virginia (37.4° N, 77.7° W: paleocoordinates 2.3° N, 16.2° W)

• coordinate stated in text

• local area-level geographic resolution

When: Productive Coal Measures? Member (Tuckahoe Formation), Carnian (237.0 - 228.0 Ma)

• middle formation in Richmond basin

• formation-level stratigraphic resolution

Environment/lithology: "floodplain"; black, gray, silty shale and coal

• Richmond Basin is one of the Newark Supergroup opening in the late Triassic

Size class: macrofossils

Preservation: mold/impression, coalified

Collection methods: salvage, mechanical, peel or thin section,

Primary reference: B. Cornet and P.E. Olsen. 1990. Early to Middle Carnian (Triassic) Flora and Fauna of the Richmond and Taylorsville Basins, Virginia and Maryland, U.S.A. Virginia Museum of Natural History Guidebook (1)1-87 [A. Rees/D. Sunderlin/J. Cassara]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 24110: authorized by Allister Rees, entered by Dave Sunderlin on 31.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Auriculophora acrostichoides, Leptocyclotes americana, Trassiflorites grandiflora
Leptocyclotes americana
assoc. w/ Neocalamites
Trassiflorites grandiflora
poss. repro. structure of Macrotaeniopteris
Equisetopsida
 Pinidae - Pinidae
Primaraucaria wielandii
Sphenopteridae
  - Sphenopteridae
Sphenopteris sitholeyi
Cycadopsida
 Cycadales -
Taeniopteris diminuta, "Macrotaeniopteris crassinervis" = Taeniopteris crassinervis, Stangerites obliqua, Stangerites planus
"Macrotaeniopteris crassinervis" = Taeniopteris crassinervis Feistmantel 1877 cycads
Stangerites obliqua cycads
= Psuedodanaeopsis nervosa
Stangerites planus cycads
= P. reticulata
 Cycadales - Cycadaceae
Sphenozamites rogersianus, "Pterophyllum braunianum" = Ctenophyllum braunianum, Zamiostrobus lissocardius
Sphenozamites rogersianus Fontaine 1883 cycads
"Pterophyllum braunianum" = Ctenophyllum braunianum Göppert 1844 cycads
= C. truncatum
Macrotaeniopteris magnifolia
  -
Macrotaeniopteris magnifolia
Ginkgoopsida
 Caytoniales - Caytoniaceae
"Sagenopteris rhoifolia" = Sagenopteris nilssoniana
"Sagenopteris rhoifolia" = Sagenopteris nilssoniana Brongniart 1825
 Ginkgoales -
Sphenobaiera striata
Sphenobaiera striata
= Baiera multifida
 Bennettitales -
"Pterophyllum giganteum" = Pterophyllum, "Pterophyllum grandifolium" = Pterophyllum, "Osmundites winterpockensis" = Pterophyllum
"Pterophyllum giganteum" = Pterophyllum
assoc. w/ Clathropteris
"Pterophyllum grandifolium" = Pterophyllum
"Osmundites winterpockensis" = Pterophyllum
stem with leaf scar impressions
 Coniferales - Podocarpaceae
Podozamites lanceolatus, Podozamites tenuistriatus
Podozamites lanceolatus Lindley and Hutton 1840 podocarp
= P. emmonsi
Podozamites tenuistriatus Rogers 1843 podocarp
assoc. w/ Clathropteris and Pterophyllum braunianum
Plicarizamites lanceolatus
  -
Plicarizamites lanceolatus
Lycopodiopsida
 Isoetales -
Isoetodendron striata
Isoetodendron striata Bock 1969 clubmoss
Lonchopteris
  -
Lonchopteris oblonga
Lonchopteris oblonga Emmons 1856
= L. virginiensis and similar to Cynepteris
Polypodiopsida
  -
Cladophlebis mexicana
Cladophlebis mexicana
= C. microphylla Fontaine (ovata? pseudoshitbiensis?)
  - Osmundaceae
Acrostichites linnaeaefolius
Acrostichites linnaeaefolius Bunbury 1847
vars. rhombifolius, microphyllus, and densifolius
  - Polypodiaceae
Clathropteris meniscoides
 Marattiales - Marattiidae
Mertensides bullatus
Mertensides bullatus Bunbury 1847
  - Gleicheniaceae
Dicranopteris sp., Gleichenites distans
Dicranopteris sp. Bernhardi 1805
 Cyatheales - Polypodiidae
Cyathoforma minuta, Cyathoforma penticarpa, Cyathoforma carolinensis, Cyathocaulis carolinensis, Pteridocaulis facialis, Pteridocaulis rhombiformis
Cyathoforma minuta scaly tree fern
Cyathoforma penticarpa scaly tree fern
Cyathoforma carolinensis Emmons 1856 scaly tree fern
=Asterocarpus virginiensis and A. platyrachis
Cyathocaulis carolinensis scaly tree fern
Pteridocaulis facialis scaly tree fern
stem of tree fern
Pteridocaulis rhombiformis Bock 1969 scaly tree fern
stem of tree fern
 Equisetales - Equisetidae
Equisetites richmondensis, Equisetites rogersii, Neocalamites virginiensis
Neocalamites virginiensis Fontaine 1883
= Schizoneura planicostatus and Calamites arenaceus
Danaeopsis
  -
Danaeopsis virginiensis