Chionanthus siwalicus

Name

Chionanthus siwalicus

Rank

Species

Generic Name

[Genus] Chionanthus

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

62

Year

2015

Fossil Status

leaves

Stratigraphy

Tortonian

Strat. comment

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

Location

Ramthi River Section, Oodlabari area, Darjeeling District, West Bengal, India

Paleoregion

Eurasia (Indostan)

Data for Holotypus

Repository

Birbal Sahni Institute of Palaeosciences, Lucknow, India

Repository Number

40380

Num

19: 1

Pub.

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

Data for Paratypus

Repository

Birbal Sahni Institute of Palaeosciences, Lucknow, India

Repository Number

40381

Num

19: 2

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 ovate; preserved size 4.3 x 4.1 cm and 5.5 x 3.5 cm; apex broken, base obtuse; margin entire; texture thick chartaceous; venation pinnate, eucamptodromous; primary vein single, prominent, slightly curved, weak; secondary veins 4–5 pairs visible, 0.6 to 1.3 cm apart, alternate, seemingly unbranched, angle of divergence (about 60°–75º), wide acute to nearly right angle, basal secondaries arise nearly at right angle, uniformly curved up and joined to their superadjacent secondaries; intersecondary veins present, simple; tertiary veins fine, poorly preserved with angle of origin usually RR, percurrent, almost straight to sinuous, branched, oblique in relation to midvein, predominantly alternate and close.