Orontiophyllum ferreri

Name

Orontiophyllum ferreri

Rank

Species

Generic Name

[Genus] Orontiophyllum

Authors (Pub.)

Sender L. M. Doyle J. A. Upchurch G. R., Jr. Villanueva-Amadoz U. B. Diez J. B.  

Publication

Leaf and inflorescence evidence for near-basal Araceae and an unexpected diversity of other monocots from the late Early Cretaceous of Spain [2018/11]

Journal

Journal of Systematic Palaeontology

Annee/Jahrgang

2018

Issue

10.1080/14772019.2018.1528999

Page number

7

Year

2018

Fossil Status

leaves

Stratigraphy

Albian

Location

Huesa del Común, Teruel Province, Spain

Paleoregion

Eurasia (Europe)

Data for Holotypus

Repository

Museo de Ciencias Naturales, Universidad de Zaragoza, Zaragoza, Spain

Repository Number

MPZ 2018/373 (part and counterpart)

Num

3

Pub.

Leaf and inflorescence evidence for near-basal Araceae and an unexpected diversity of other monocots from the late Early Cretaceous of Spain [2018/11]

Diagnosis

Leaf simple, entire-margined, lamina strapshaped but expanded at apex and tapering at base, costa broad and weakly developed, distinct only in the basal portion of the lamina, multi-stranded, with veins spreading apically, primary venation parallel-pinnate, with three or four distinct orders of primary lateral veins, with the number of vein orders varying with the distance between the thickest veins, the thinnest order sinuous, the others straight, angle between primary lateral veins and costa 10, with angle of divergence decreasing apically, two orders of transverse veins present, the first (thicker) order connecting different orders of primary lateral veins at angles ranging from 40 to 90 to the parallel veins, the second order thin, connecting only adjacent parallel veins to form rectangular to polygonal areoles. Epidermis with cells organized into rows, stomata restricted to one surface. Epidermal cells on stomatal surface predominantly four-sided, ranging in shape from rectangular to trapezoidal and rhomboidal; cell rows with stomata alternating with cell rows without stomata, non-stomatal rows 3–8 cells wide, stomatal rows one cell wide, anticlinal walls with thicker cuticle than those in non-stomatal rows, stomata longitudinally oriented, subsidiary cell arrangement brachyparacytic, subsidiary cells large, crescent- or kidney-shaped, often extending beyond ends of the guard cells, their ends often adjoining small rhomboidal to trapezoidal cells in the same ontogenetic row. Epidermal cells on non-stomatal surface wider and shorter than unspecialized cells of the stomatal surface, sometimes transversely elongate (i.e. wider than long in relation to the row).