Pterospermumocarpon kalviwadiense

Name

Pterospermumocarpon kalviwadiense

Rank

Species

Original spelling

kalviwadiensis

Generic Name

[Genus] Pterospermumocarpon

Authors (Pub.)

Srivastava R. Saxena R. K. Srivastava G.  

Publication

Pterospermumocarpon, a new malvalean fruit from the Sindhudurg Formation (Miocene) of Maharashtra, India, and its phytogeographical significance [2012/2]

Journal

Journal of earth system science

Volume

121

Issue

1

Page number

185

Year

2012

Parent Taxon

[Genus] Pterospermumocarpon

Fossil Status

fruits

Stratigraphy

Miocene

Location

Kalviwadi village, Sindhudurg District, Maharashtra, India

Paleoregion

Eurasia (Indostan)

Data for Holotypus

Repository

Birbal Sahni Institute of Palaeobotany, Lucknow, India

Repository Number

BSIP 39896

Diagnosis

Fruit capsule, loculicidal, dehiscent, symmetrical, elliptic to lanceolate in shape, length 3.0 cm, diameter 1.5 cm, apex acute, base obtuse, stalk broken; pentalocular, five distinct sutures present; pericarp 2.7-mm thick, epicarp 0.6 mm, mesocarp 2.0 mm, endocarp not distinct. Under higher magnification, venation-like pattern representing imprints of seed wings, may be observed on the inner surface of the locules in few capsules. Seeds not preserved. Epicarp cells predominantly rectangular and moderately thick-walled with striated ornamentation; mesocarp cells oval to circular with few polygonal ones, cell wall thicker than that of epicarp cells, frequently perforated, spongypapillate bodies protrude into the cell lumen from perforations in the cell wall; endocarp not very distinct, cells of the inner layer very thick-walled, hexagonal stone cells with very small lumen; frequently pitted vascular strands present.