Some observations on dinoflagellate cyst genus alterbidinium Lantin & Williams 1985

Khowaja-Ateequzzaman; Rahul Garg; K.P. Jain

doi:10.54991/jop.1990.1680

Authors

Khowaja-Ateequzzaman Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226007, India
Rahul Garg Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226007, India
K.P. Jain Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226007, India

DOI:

https://doi.org/10.54991/jop.1990.1680

Keywords:

Dinonagellate cyst, Cretaceous, Cauvery Basin (India)

Abstract

A detailed study of dinoflagellate cysts belonging to Alterbidinium Lentin & Williams 1985, recovered from Trichinopoly Formation (Turonian-Santonian), Cauvery Basin, southern India, revealed new information that the 2a intercalary periarchaeopyle and endoarchaeopyle are dissimilar in shape represented by steno- iso-deltaform and eury-deltaform respectivelv. The genus Alterbidinium and its two species, viz., A acutulum (Wilson) Lentin & Williams 1985 and A. minus (Alberti) Lentin & Williams 1985, are emended and a new species, A papilllatum is proposed.