PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Ulmus columbianus

Angiospermae - Rosales - Ulmaceae

Taxonomy

Ulmus columbianus was named by Berry (1926). It is a compression fossil. Its type locality is Joseph Creek, which is in an Eocene lacustrine shale in the Chu Chua Formation of Canada.

It was replaced with Ulmus chuhuanus by LaMotte (1952).

Sister species lacking formal opinion data

U. bronii, U. carpinoides, U. chaneyi, U. davidiana, U. drepandodonta, U. drepanodonta, U. fischeri, U. harutoriensis, U. hedini, U. knowltoni, U. laevigata, U. longifolia, U. microphylla, U. miopumila, U. montanensis, U. moorei, U. multinervis, U. paralaciniata, U. paucidentata, U. protoarvifolia, U. protojaponica, U. pyramidalis, U. shansiensis, U. subparvifolia, U. woodii, U. zelkova

Entered

by K. Volkman on 2022-11-04

Synonymy list

Year	Name and author
1926	Ulmus columbianus Berry p. 108

Is something missing? Join the Paleobiology Database and enter the data

Rank	Name	Author
kingdom	Plantae
subkingdom	Viridiplantae	Cavalier-Smith 1981
—	Streptophyta	(Jeffrey 1971)
superphylum	Embryophyta	()
—	Tracheophyta	(Sinnott 1935)
phylum	Spermatophyta
class	Angiospermae

Rank	Name	Author
—	Rosids
—	Eurosids
—	Fabid
order	Rosales
family	Ulmaceae
genus	Ulmus
species	columbianus

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

†Ulmus columbianus Berry 1926

show all | hide all

Diagnosis

Reference	Diagnosis
E. W. Berry 1926	Leaves broadly ovate in form; markedly inequilateral, especially at the base; variable in size; short petiolate; the margin coarsely crenate, with inconspicuous denticulate teeth on the lower convex limb of the very coarse crenations. Length ranging from 6 cm. to 8 cm. Maximum width, at or below the middle, ranging from 3 · 5 cm. to 4 · 5 cm. Petiole short, stout, and curved, enlarged proximad, about 8 mm. in length. Midrib stout. Secondaries about 12, opposite to alternate, straight, craspedodrome pairs which give off distad on their outer sides 1 or 2 curved craspedodrome branches. Internal tertiaries thin, percurrent.