The INTERNATIONAL FOSSIL PLANT NAMES INDEX
Global registry of scientific names of fossil organisms covered by the International Code of Nomenclature for Algae, Fungi, and Plants and the International Code of Zoological Nomenclature © 2014-2022

IDNAME urn:idName:ifpni.org:species:94F1C088-17C3-609B-7852-8EF75FC18D4B species
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Craspedodromophyllum acutum

Craspedodromophyllum acutum P.R. Crane Bot. J. Linn. Soc., 83(2): 107. 9 Nov 1981
Name
Craspedodromophyllum acutum
Rank
Species
Generic Name
[Genus] Craspedodromophyllum
Authors (Pub.)
Crane P. R.  
Publication
Betulaceous leaves and fruits from the British Upper Palaeocene [1981/11]
Journal
Botanical Journal of the Linnean Society
Volume
83
Issue
2
Page number
107
Year
1981
Fossil Status
leaves
Stratigraphy
Paleocene
Location
Cold Ash Quarry, Newbury, Berkshire, England, U.K.
Paleoregion
Eurasia (Europe)
Data for Holotypus
Repository
Natural History Museum, London, U.K.
Repository Number
V.59801a
Data for Paratypus
Repository
Natural History Museum, London, U.K.
Repository Number
V.59792- V.59800, V.59802-59815
Diagnosis
Leaves elliptic to narrowly elliptic, 4G150 mm long and 1G50 mm wide. Base acute, apex attenuate. Petiole proximally dilated, up to 26mm in length. Secondary veins arising from the midrib alternately in 12-16 pairs, rarely opposite. Angle of divergence 15-(25-35)-60 degrees. Distance between secondary veins measured at the midrib 1-(4-11)-17 mm decreasing apically. Origin of lowermost secondary vein supra-basal. Basal veins, thin, of tertiary order, occasionally proximally contiguous with the margin. Tertiary venation percurrent, alternate, rarely opposite; straight to slightly convex, branched and unbranched. Mid-vein, tertiary angle 85-(95-110)-120 degrees. Quarternary venation orthogonal forming irregular polygonal areolae. Teeth non-glandular. Subsidiary teeth absent from the apex but increasing to up to four basally. Secondary vein of primary tooth usually basally displaced. Apical margin acuminate or concave, basal margin usually acuminate or convex. Base of sinus with a well developed vein plexus, usually supplied by five tertiary veins: the basal vein of the supra-adjacent tooth, the apical vein of the infraadjacent tooth, branches from the supra- and infra-adjacent secondary, and a branch formed by the merger of two tertiaries from the supra- and infra-adjacent secondary. (Occasionally the plexus may be formed of four to six tertiary veins but the general organization remains the same)
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