Abstract
Megaspores and ostracods from the Rhaeto-Liassic section of the boring Rødby No. 1 are studied.15 species of megas pores are described, of which two are new: Bacutriletes reticuliferus n. sp. and Horstisporires sp. (Type No. 5). Another one, Macrosporites cf. brasserti (Stach & Zerndt) is a derived carboniferous form. Two assemblage zones are defined, namely the T. pinguis Assemblage Zone(below, Rhaetic) and the N. hopliticus Assemblage Zone (above, Lower Lias).10 species of ostracods from the Lias section are described, of which two are new: Procyrheridea mediorericulata n. sp. and Stenestroemia ? roedbyensis n. sp., and five have open nomenclature. The ostracods from the Rhaetic are registered but not described. The O. aspinata Assemblage Zone (Lower Lias) is defined.The Rhacto-Liassic section is divided chronostratigraphically in Middle Rhaetic, Upper Rhaetic, Lower Hettangian, Upper Hettangian, and ? Lower Sinemurian.
Highlights
The boring of R0dby No I was made during the early months of 1952
Comparison and discussion : The reticulate system of connections between the bacula clearly separates this species from the genotype Bacutriletes ty/otus (HARRIS) PoTONIE as do the entirely sculptured tecta
B. reticuliferus n. sp. cannot be compared with the small Bacutriletes specimens of JUNG
Summary
Megaspores and ostracods from the Rhaet o- Lia ss ic section of the boring R0dby No I are studied. 15 species of megas pores are desc ribed, of which two are new : Bacutriletes reticuliferus n. Another one, Macrosporites cf brasserti (STA CH & Z ERNDT) is a deri ved carboniferous form. Two assemblage zones are defined, namel y the T. Pi11g11is Assembl age Zone {below, Rhaetic) and the N. hopliticus Assemblage Zone (above, Lower Lia s). 10 species of o straco ds from the Lias section are described, of which two are new : Pro cyrheridea m edior ericu lata n. The ostracods from the Rhaetic are registered but not desc ribed. Aspinata Assemblage Zone (Lower L ias) is defined. The Rhacto-Liassic section is divided chronostratigraphically in Middle Rh aeti c, Upper Rhaetic, Lower Hettangian, Upper Hettangian , and ? The Rhacto-Liassic section is divided chronostratigraphically in Middle Rh aeti c, Upper Rhaetic, Lower Hettangian, Upper Hettangian , and ? Lower Sinemurian
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