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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. carpinoides, U. drepandodonta, U. drepanodonta, U. longifolia, U. multinervis

Synonymy list
YearName and author
1926Ulmus columbianus Berry p. 108

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RankNameAuthor
kingdomPlantae
phylumSpermatophyta
classAngiospermae
—Rosids
—Eurosids
RankNameAuthor
—Fabid
orderRosales
familyUlmaceae
genusUlmus
speciescolumbianus

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
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Diagnosis
ReferenceDiagnosis
E. W. Berry 1926Leaves 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.
Measurements
No measurements are available
Diet: "photoautotroph"p
Created: 2011-07-22 00:04:15
Modified: 2011-07-21 09:04:15
Source: p = phylum
Reference: Kiessling 2009

Age range: Early/Lower Eocene or 55.80000 to 48.60000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Early/Lower Eocene55.8 - 48.6Canada (British Columbia) Ulmus columbianus (type locality: 227791)