Some observations of the genus Contignisporites Dettmann 1963
DOI:
https://doi.org/10.54991/jop.1966.752Abstract
Contignisporites Dettm. is represented by 6 species in the coals of the Jabalpur Series (Lower Cretaceous, India) out of which 2 species. i.e., C. psilatus sp. nov. and C. dettmannii sp. nov. have been proposed new. Both the new species are distinct from others by having the equatorial region of each contact face and the interradial polar exine free from sculpture although some specimens of C. dettmannii sp. nov. possess some inconspicuous features, viz. muri-like elevations on the proximal face of the central body. Such forms seem to bridge the gap between those which either have proximally laevigate or sculptured exines. Also, the circumscription of Contignisporites has been enlarged in this paper to include a diverse variety of forms ranging from proximally laevigate to sculptured exines in varying degree.
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Dettmann ME 1963. Upper Mesozoic microfloras from southeastern Australia. Proc. Roy. Soc. Vic. 77(1): 1-148.
Singh C 1964. Microflora of the Lower Cretaceous Mannville group, east-central Alberta. Res. Counc. Alberta Bull. 15: 1-238.
Singh HP 1966. Reappraisal of the mioflora from the Jabalpur Series of India with remarks on the age of the beds. The Palaeobotanist 15 (1,2): 87-92.
Singh HP, Srivastava SK, Roy SK 1964. Studies on the Upper Gondwana of Cutch. 1. Mio- and Macrospores. The Palaeobotanist 12(3): 282-306. https://doi.org/10.54991/jop.1963.666
Vishnu-Mittre 1954. Petrified spores and pollen grains from two Jurassic rocks of Rajmahal Hills, Bihar. The Palaeobotanist 3: 117-127. https://doi.org/10.54991/jop.1954.461
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