NDLI: On the status of some Miospore genera from the Mesozoic Era

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On the status of some Miospore genera from the Mesozoic Era

Content Provider	Birbal Sahni Institute of Paleobotany
Author	Bharadwaj, D.C. Kumar, Pramod
Abstract	Six miospore genera, v1z. Neoraistrickia Potonie (1956), Malonisporiles Couper (1958), Callispora Dev (1961), Boseisporites Dev (1961), Densoisporites Weyland & Krieger (1953) and Callialasporites DeV (1961) have been emended in this paper. NeoraistrickiaPotonie emend., is distally baculate and proximally smooth. Matonisporites Couperemened., has thicker corners, membraneous Y-rays and smooth exine. Callispora Dev emend., is characterized by having incipiently thickened angles and punctate exine. Boseisporites Dev emend., possesses two-layered exine, the outer layer being hyaline and varyingly punctate but the inner one darker, rarely punctate and continuous all round the- equator being broader at the angles. DensoispOrites Weyland & Krieger emend., has two-layered, cavate spore wall, the exoexine- being thicker distally and equatorially than on the proximal face and sculptured with very low, free to anastomosing grana. CallialasporitesDev emend., ·is a monosaccate genus having two-layered exine. Exoexine and intexineare se-parated from each other variably subequatorially on both the faces. Saccus is microsculptured (microbaculate or microverrucose) and has a limboid marginal thickening. The specific diagnoses of nine species, viz. Neoraislrickia truncala (Cookson) Potonie (1956), N. neozealandica (Couper) Potonie (1956), Callispora potoniei Dev (1961),Boseisporites praeclarus Dev (1961), Densoispori tes mesozoicus Singh, Srivastava & Roy (1964), Callialasporites Irilobatus (Balme) Dev (1961), C. dampieri (Balme) Dev (1961), C. segmenlatus (Balme) Srivastava (1963) and C. discoidalis (Doring) comb. nov. have also been emended on the lines of the emended generic diagnoses.
Starting Page	214
Ending Page	224
File Format	PDF
Volume Number	19
Language	English
Publisher Date	1970-01-01
Access Restriction	Open
Content Type	Text
Educational Use	Research Reading
Resource Type	Article
Education Level	Under Graduate Post Graduate
Subject	Paleobotany; fossil microorganisms

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