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Lithostrobus
Taxonomy
Lithostrobus was named by Bütschli (1882) [Sepkoski's age data: P R]. It is extant. It was considered unknown by Bütschli (1882).
It was assigned to Theoperidae by Bütschli (1882); and to Nassellaria by Sepkoski (2002).
It was assigned to Theoperidae by Bütschli (1882); and to Nassellaria by Sepkoski (2002).
Species
Synonyms
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Synonymy list
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. Lithostrobus Bütschli 1882
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Lithostrobus argus Ehrenberg 1874
Lithostrobus picus Ehrenberg 1874
†Lithostrobus rostovzevi Lipman 1960
Invalid names: Lithostrobus wendlandi Rüst 1892 [nomen dubium]
Diagnosis
Reference | Diagnosis | |
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O. Bütschli 1882 | In this group, I place some forms that are strongly related to the eucyrtids and were listed by Ehrenberg in the genus Eucyrtidium. They are characterized by many segments (up to nine segments observed), that present, moreover, progressively enlarging diameters, so that the shape of the shell is a narrow cone. The occurrence of a terminal narrowing of the apertural end of the shell is dubious. This is the case of Eucyrtidium argus Ehrenberg, from the first to the fourth or fifth segment |