Foraminifera source details
Stenestad, E. (1968). Three new species of Heterohelix Ehrenberg from the upper Senonian of Denmark. Medd. Dansk Geol. Forening. 18(1): 64-70.
284501
Stenestad, E.
1968
Three new species of Heterohelix Ehrenberg from the upper Senonian of Denmark
Medd. Dansk Geol. Forening
18(1): 64-70
Publication
The genus Heterohelix EHRENBERG, 1843 is widely distributed in the Danish Cre taceous deposits. From the Danish Heterohelix-material (STENESTAD, in press) three new species are described. Heterohelix pachyinarginata, which is charac terized by a strongly thickened initial margin, is present in the Upper Campanian and the Lowermost Maestrichtian. H. dentata, characterized by its dentate-looking adult periphery, ranges from the upper part of the Lower Maestrichtian to the lower boundary of the Danian. H. robusta, a large and robust form with coarse longitudinal costae, is known from the Upper Campanian and the lowermost Maestrichtian. Besides the descriptions of species, a genus diagnosis and a genus description are given, which give some new observations of morphologic details and a re-evaluation of some features of the test.
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Heterohelix dentata Stenestad, 1968 † accepted as Laeviheterohelix dentata (Stenestad, 1968) † (original description)
Heterohelix pachymarginata Stenestad, 1968 † accepted as Planoheterohelix planata (Cushman, 1938) † (original description)
Heterohelix robusta Stenestad, 1968 † (original description)
Heterohelix pachymarginata Stenestad, 1968 † accepted as Planoheterohelix planata (Cushman, 1938) † (original description)
Heterohelix robusta Stenestad, 1968 † (original description)