A stratigraphic and taxonomic atlas of Bolboforma (Protophytes, incertae sedis, Tertiary).

Spiegler, Dorothee and Daniels, C. H. von (1991) A stratigraphic and taxonomic atlas of Bolboforma (Protophytes, incertae sedis, Tertiary). Journal of Foraminiferal Research, 21 (2). pp. 126-158. DOI 10.2113/gsjfr.21.2.126.

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Abstract

Members of the genus Bolboforma are marine microfossils
of generally spheroidal shape, whose tests
are composed of monocrystalline low-magnesium calcite,
and are believed to be derived from protophytic
algae. Bolboformids have been studied primarily in sediments
from the North Atlantic, the North Sea Basin,
and southern high latitudes; they range in age from
middle Eocene to early Pliocene. They have not been
observed in Pleistocene to Recent sediments. The geographical
distribution of the genus and the stratigraphic
occurrence of 42 Bolboforma taxa are outlined herein.
Thirteen biozones are defined. Bolboformids, as now
known, are distributed mainly in high latitudes. So far,
occurrences in low latitudes are rare. These microfossils
have considerable biostratigraphic value, mainly in high
latitudes, where they supplement the standard zonations
based on other microfossil groups.
This paper includes monographic, uniform descriptions
of all known Bolboforma taxa. New species are
Bolboforma atlantica, B. bella, B. compressibadenensis,
B. compressispinosa, B. furcata, B. geomaris, B. indistincta,
B. latdorfensis, B. micra, B. pustula, B. pentaspinosa,
B. praespinosa, B. robusta, B. subfragoris, and
B. subreticulata. Four taxa are left in open nomenclature.

Document Type: Article
Keywords: Bolboforma, Protophytes, incertae sedis, Tertiary
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.2113/gsjfr.21.2.126
ISSN: 0096-1191
Date Deposited: 22 Mar 2016 07:42
Last Modified: 25 May 2016 09:04
URI: http://oceanrep.geomar.de/id/eprint/31871

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