Pterospermella piniformis, (Zaklinskaya, 1957) Takahashi & Sugiyama, 1990

Legrand, Julien, Pons, Denise, Nishida, Harufumi & Yamada, Toshihiro, 2011, Barremian palynofloras from the Ashikajima and Kimigahama formations (Choshi Group, Outer Zone of south-west Japan), Geodiversitas 33 (1), pp. 87-135 : 114

Pityosporites sp. cf. P. piniformis ( Zaklinskaya, 1957) Takahashi & Sugiyama, 1990

OCCURRENCE. — Ashikajima and Kimigahama Fm.

DESCRIPTION

Bisaccate pollen grain. Central body oval, psilate to finely scabrate. Two small sacci are distally hanging. Proximal crest 1 to 1.5 µm thick. Total width = 50-55 µm; grain height = 15-20 µm. Sacci (length × width) = 20 × 15 µm.

REMARKS

This grain, firstly described in the Eocene-Oligocene of the Pavlodar Irtysh Basin (western Siberia) by Zaklinskaya (1957), was found by Takahashi & Sugiyama (1990) in the Santonian (Taneichi Formation) of north-east Honshu, Japan. Zaklinskaya (1957) had previously placed it in the genus Cedrus Trew.

BOTANICAL AFFINITIES

Pinales , probably Pinaceae .