Itahana Flora Locality J (Miocene to of Japan)

Where: Gunma, Japan (36.3° N, 139.0° E: paleocoordinates 37.6° N, 137.4° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Itahana Formation (Tomioka Group), Tortonian to Tortonian (11.6 - 5.3 Ma)

• These beds are situated about 10 m above those of Loc. I.

• bed-level stratigraphic resolution

Environment/lithology: marine; poorly lithified, sandy sandstone

• Above Loc. I are developed tuff breccia and several thin cyclothems.

Size class: macrofossils

Preservation: original carbon

Collection methods: surface (in situ),

• Carya is most predominant in number of specimens, followed by Ulmus protojaponica, Carpinus miocenica, Halesia sp., Carpolithes japonicus, and Pterocarya protostenopteris. No species of evergreen broad leaved trees are found. Siltstone in the upper cyclothem yields poor fossils in three horixons, comprising only "Ficus" and Gramineae.

Primary reference: K. Ozaki. 1991. Late Miocene and Pliocene Floras in Central Honshu, Japan. Bulletin of Kanagawa Prefectural Museam Natural Science Special Issue 1-244 [H. Sims/H. Lindon/H. Lindon]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 21265: authorized by Hallie Sims, entered by Heather Lindon on 24.06.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Carpolithes
  -
Angiospermae
 Vitales - Vitaceae
Vitis naumannii grapevine
 Fagales - Fagaceae
Fagus sp. Linnaeus 1753 beech
 Fagales - Juglandaceae
 Fagales - Betulaceae
Ostrya sp. Scopoli 1760 hophornbeam
Carpinus sp. Linnaeus 1753 hornbeam
 Fabales - Fabaceae
Caesalpinia hokiana peacock flower
Cladrastis inouei yellowwood
Lespedeza sp. Michaux 1803 bush clover
 Rosales - Papilionaceae
 Rosales -
 Rosales - Rosaceae
 Rosales - Rhamnaceae
"Berchemia miofloribunda" = Berhamniphyllum miofloribundum
"Berchemia miofloribunda" = Berhamniphyllum miofloribundum Hu and Chaney 1940 buckthorn
 Rosales - Ulmaceae
Celtis hokiensis hackberry
Zelkova ungeri Kovats 1865 zelkova
 Rosales - Pomaceae
Malus sp. Miller 1758
 Malpighiales - Salicaceae
Salix muraii willow
Salix sp. Linnaeus 1753 willow
 Sapindales - Sapindaceae
Acer sp. Linnaeus 1753 maple
Acer protomiyabei Endo 1950 maple
? Sapindus sp. Linnaeus 1753 soapnut
Dicotyledoneae
 Ericales - Styracaceae
Halesia sp. Linnaeus 1759 silverbell
Angiospermae
 Ranunculales - Menispermaceae
Cocculus sp. de Candolle 1817
 Lamiales - Oleaceae
Fraxinus sp. Linnaeus 1753 ash
 Aquifoliales - Aquifoliaceae
 Dipsacales - Caprifoliaceae
Lonicera sp. Linnaeus 1753 honeysuckle
 Poales - Poaceae
"Gramineae indet." = Poaceae, Bambusites sp., ? Phragmites sp.
"Gramineae indet." = Poaceae Barnhart 1895 true grass
Bambusites sp. Ettingshausen 1886 grass
? Phragmites sp. Adanson 1763 common reed
 Poales - Cyperaceae
Carex spp. Linnaeus 1753 sedge
 Magnoliales - Magnoliaceae
Magnolia sp. Linnaeus 1753 magnolia
 Coniferales - Cupressaceae
Metasequoia occidentalis Chaney 1951 dawn redwood
Pinopsida
 Pinales - Pinaceae