Eriolaena paleowallichii

Name

Eriolaena paleowallichii

Rank

Species

Generic Name

[Genus] Eriolaena

Authors (Pub.)

Shukla S. Chandra K. Shukla A.  

Publication

Gondwanan origin and foremost Miocene diversification explain the paleotropical intercontinental disjunction (PID) in the winged seed clade of Malvaceae [2024/12]

Journal

Perspectives in Plant Ecology, Evolution and Systematics

Annee/Jahrgang

2025

Volume

66

Issue

125842

Page number

5

Year

2024

Fossil Status

leaves

Stratigraphy

Ypresian

Strat. comment

Palana Formation

Location

Gurha lignite mine (east), Bikaner district, Rajasthan, India

Paleoregion

Eurasia (Indostan)

Data for Holotypus

Repository

Birbal Sahni Institute of Palaeosciences, Lucknow, India

Repository Number

BSIP 42326

Num

Fig. 3

Pub.

Gondwanan origin and foremost Miocene diversification explain the paleotropical intercontinental disjunction (PID) in the winged seed clade of Malvaceae [2024/12]

Data for Paratypus

Repository

Birbal Sahni Institute of Palaeosciences, Lucknow, India

Repository Number

BSIP 42327 (Fig. 5A) and BSIP 42328 (Fig. 5B)

Num

Fig. 5A, Fig. 5B

Pub.

Gondwanan origin and foremost Miocene diversification explain the paleotropical intercontinental disjunction (PID) in the winged seed clade of Malvaceae [2024/12]

Diagnosis

Leaf well preserved and complete; lamina asymmetrical to symmetrical in medial symmetry; symmetrical to asymmetrical in basal symmetry; nearly wide ovate in shape, preserved lamina length 11–7.2 cm, preserved width 7.8–6.1 cm; length-width (L/W) ratio 1.4:1–1.2:1, mesophyll to notophyll; petiole preserved, marginal in attachment, thick, 4.6–3 cm in length, 2–1.8 mm in width; texture possibly chartaceous; apex acute, acuminate in shape; base preserved,; basal extension symmetrical, reflex angle, cordate shape; margin unlobed, toothed; three primary veins visible (mid vein and one pair of lateral primary veins [LPV]), basal actinodromous, mid vein 9.2–6.4 cm in length, 1–0.7 mm in width, straight, weak to moderately thick; one pair of basal most LPV arising from the base, LPV reaching upto one-third portion of lamina from the base, divergence angle of LPV to midvein 56.6◦-41.6◦- (right half) and 54.9◦-37.6◦ (left half), distance between (LPV) and first pair of secondary 2–3.7 cm; major secondary veins present, arising from middle portion of lamina, visible 4–6 pairs, 1.8–0.8 cm apart, mixed [craspedodromous to predominantly semicraspedodromous]) to craspedodromous, alternate to opposite, spacing abruptly increasing towards the base, angle to midvein inconsistent, angle of divergence acute (42◦-56◦), excurrent to the primary vein; agrophic veins present, compound; minor secondaries present, predominantly semicraspedodromous to craspedodromous; intersecondary veins absent; number of basal veins 5 - 7; margin toothed, serrate, mostly dentate, spacing irregular, order of teeth third, sinus shape angular,tooth shape convex/convex (cv/cv), straight/ straight (st/st), convex/flexuous (cv/fl), straight/flexuous (st/fl), flexuous/ convex (fl/cv), flexuous/ flexuous (fl/fl), concave/convex (cc/cv); principal veins present, termination marginal, at tooth apex; tertiary veins percurrent, alternate to opposite, mostly simple, straight, less branched, chevron, angle of origin RR, AR, AA, RA; epimedial tertiary present, percurrent, course perpendicular and acute to midvein; quaternary veins irregular reticulate; areoles poorly preserved.