THE LOWER ORDOVICIAN GRAPTOLITES DIDYMOGRAPTUS-BALTICUS TULLBERG AND DIDYMOGRAPTUS-PROTOBALTICUS MONSEN

Authors
MALETZ J
Citation
J. Maletz, THE LOWER ORDOVICIAN GRAPTOLITES DIDYMOGRAPTUS-BALTICUS TULLBERG AND DIDYMOGRAPTUS-PROTOBALTICUS MONSEN, Norsk geologisk tidsskrift, 76(2), 1996, pp. 107-114
Citations number
39
Categorie Soggetti
Geosciences, Interdisciplinary
Journal title
Norsk geologisk tidsskrift
ISSN journal
0029196X → ACNP
Volume
76
Issue
2
Year of publication
1996
Pages
107 - 114
Database
ISI
SICI code
0029-196X(1996)76:2<107:TLOGDT>2.0.ZU;2-O
Abstract
The biostratigraphically important didymograptid graptolites Didymogra ptus balticus Tullberg and Didymograptus protobalticus Monsen are rede scribed using type specimens, as well as newly discovered material fro m Scandinavia. It is concluded that D. balticus is a rare species. Its age is shown to be restricted to the early Bendigonian (Be 1-2). Its range overlaps considerably with that of the closely related but more long-ranging and common D. protobalticus.