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Two new Ordovician graptolites from Bolivia

Published online by Cambridge University Press:  01 May 2009

S. C. Finney  and
L. Branisa
S. C. Finney
Affiliation:
Department of Geology, Oklahoma State University, Stillwater, Oklahoma 74078, U.S.A.
L. Branisa
Affiliation:
YPFB-CTP, Casilla 727, Santa Cruz, Bolivia
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Abstract

Two new graptolite species from the Ordovician of Bolivia are described. These species, Maeandrograptus bolivianus n.sp. and Gymnograptus floweri n.sp., were probably contemporaneous with congeners from the Didymograptus hirundo Zone (Lower Ordovician) of Sweden and the lower half of the Glyptograptus teretiusculus Zone (Middle Ordovician) of Baltoscandia, respectively. This is the first report of these genera in the Western Hemisphere.

The assignment of a new species to Maeandrograptus necessitated a review and revision of that genus. As revised, it consists of M. schmalenseei Moberg, Didymograptus mobergi Törnquist, and M. bolivianus n.sp. Cymatograptus undulatus is a possible ancestor for this group of species, and an assignment of Maeandrograptus to the Sinograptidae is favoured.

Type
Articles
Information
Geological Magazine , Volume 121 , Issue 4 , July 1984 , pp. 357 - 366
Copyright
Copyright © Cambridge University Press 1984

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