Spatholobus siwalicus

Name

Spatholobus siwalicus

Rank

Species

Generic Name

[Genus] Spatholobus

Authors (Pub.)

Prasad M. Kannaujia A. K. Alok Singh S. K.  

Publication

Plant megaflora from the Siwalik (Upper Miocene) of Darjeeling District, West Bengal, India and its palaeoclimatic and phytogeographic significance [2015/12]

Journal

Palaeobotanist

Volume

64

Issue

1–2

Page number

52

Year

2015

Fossil Status

leaves

Stratigraphy

Tortonian

Strat. comment

Geabdat Sandstone Formation (Middle Siwalik); Upper Miocene (Sarmatian to Pontian)

Location

Sevok Road Section, Oodlabari area, Darjeeling District, West Bengal, India

Paleoregion

Eurasia (Indostan)

Data for Holotypus

Repository

Birbal Sahni Institute of Palaeosciences, Lucknow, India

Repository Number

40372

Num

15: 1

Pub.

Plant megaflora from the Siwalik (Upper Miocene) of Darjeeling District, West Bengal, India and its palaeoclimatic and phytogeographic significance [2015/12]

Diagnosis

Leaf simple, asymmetrical, wide elliptic; preserved size 12.7 x 7.2 cm; apex broken; base obtuse, inequal; margin entire; texture chartaceous; venation pinnate, eucamptodromous; primary vein single, prominent, almost straight, stout; secondary veins 10–11 pairs visible, 0.9 to 1.9 cm apart, alternate to sub–opposite, unbranched, angle of divergence (40°–60°), narrow to moderately acute, uniformly curved up running for a long distance and joining to their superadjacent secondaries at right angle; intersecondary veins not visible; tertiary veins thick, angle of origin, RR, percurrent, straight to sinuous, branched, oblique in relation to midvein, predominantly alternate and close to distant; quaternary veins with angle of origin usually RR, percurrent sometime branched forming usually orthogonal to polygonal meshes.