Soma (Jurassic of Japan)

Also known as PGAP 338

Where: Fukushima, Japan (37.7° N, 140.9° E: paleocoordinates 45.2° N, 144.1° E)

• coordinate estimated from map

When: Tochikubo Formation, Late/Upper Jurassic (163.5 - 145.0 Ma)

Environment/lithology:

Size class: macrofossils

Primary reference: T. Kimura. 1987. Recent knowledge of Jurassic and Early Cretaceous Floras in Japan and Phytogeography of this Time in East Asia. Bulletin of Tokyo Gakugei University Section IV 39:87-115 [A. Rees/A. Rees]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 30206: authorized by Allister Rees, entered by Allister Rees on 02.04.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

• Genus-level assignments and numbers of species are from the PGAP database. Species names are in the process of being entered.
unclassified
  -
Cycadeoideopsida
 Bennettitales -
Zamites "sp. 1" Brongniart 1828
Otozamites "sp. 1" Braun 1843
Ptilophyllum "sp. 1" Morris 1840
Ptilophyllum "sp. 2" Morris 1840
Ptilophyllum "sp. 3" Morris 1840
Ptilophyllum "sp. 4" Morris 1840
Pinopsida
 Pinales - Podocarpaceae
 Pinales - Cheirolepidiaceae
Frenelopsis "sp. 1" Fontaine 1889
Cycadopsida
 Cycadales -
"Nilssonia "sp. 1"" = Nilsonia, "Nilssonia "sp. 2"" = Nilsonia, "Nilssonia "sp. 3"" = Nilsonia
"Nilssonia "sp. 1"" = Nilsonia Brongniart 1825 cycads
"Nilssonia "sp. 2"" = Nilsonia Brongniart 1825 cycads
"Nilssonia "sp. 3"" = Nilsonia Brongniart 1825 cycads
Pteridopsida
  -
Cladophlebis "sp. 1" Brongniart 1849
Cladophlebis "sp. 2" Brongniart 1849
Cladophlebis "sp. 3" Brongniart 1849
Cladophlebis "sp. 4" Brongniart 1849
Cladophlebis "sp. 5" Brongniart 1849
Cladophlebis "sp. 6" Brongniart 1849
 Polypodiales -
Gleichenites "sp. 1" Goeppert 1836
Gleichenites "sp. 2" Goeppert 1836
Gleichenites "sp. 3" Goeppert 1836
Acrostichopteris "sp. 1" Fontaine 1889
Sphenopteridae
  - Sphenopteridae
Sphenopteris "sp. 1" Sternberg 1825