radiolaria - rads_cenozoic - Dictyocephalus obtusa radiolaria - rads_cenozoic - Dictyocephalus obtusa

Dictyocephalus obtusa


Classification: rads_cenozoic -> Plagiacanthidae -> Lophophaenidae -> Dictyocephalus -> Dictyocephalus obtusa
Sister taxa: D. obtusa, D. sp.

Taxonomy

Citation: Dictyocephalus obtusus (Ehrenberg 1844)
Taxonomic rank: species
Basionym: Cornutella obtusa Ehrenberg 1844
Synonyms:

From Suzuki Paleotax db:

1844 Cornutella (?) obtusa n. sp. Ehrenberg p. 77
1847 Lophophaena (?) obtusa Ehrenberg Ehrenberg p. 42
1854 Lophophaena (?) obtusa (Ehrenberg) Ehrenberg pl. 22, fig. 40
1862 Dictyocephalus obtusus (Ehrenberg) Haeckel p. 296
1874 Dictyocephalus obtusus (Ehrenberg) Ehrenberg p. 223
1887 Dictyocephalus (Dictyocryphalus) obtusus (Ehrenberg) Haeckel p. 1308
2009 Dictyocephalus obtusa (Ehrenberg) [Ehrenberg collection] Ogane et al. pl. 19, fig. 2a-c
Taxonomic discussion: No illustration given in Ehrenberg 1844, but in describing Dictyocephalus 1861 he noted "Lophophaena obtusa from the marls of Sicily, illustrated by me in Mikrogeologie in 1854 (pl 22), should now be referred to the genus Dictyocephalus'. Dictyocephalus obtusus Bütschli 1882 is a junior homonym of D. obtusus (Ehrenberg) - and is a trissocyclid, not a lophophaenid. The specimen illustrated in Ogane et al. from the Ehrenberg Collection is not the same specimen or even species as illustrated in Ehrenberg 1854 and is thus not the type.

Catalog entries: Cornutella obtusa

Original description: C. lorica oblonga recta, fronte truncata media constricta postrema parte late rotundata, ocellis sparsis. An Litbobotrys? Diam. 1/32"’.

E Charactere generis forma curn nunc eliminari debet.

[Cornutella? obtusa: Cornutella with a straight, rather long shell; anterior truncated; middle constricted; posterior part broadly rounded; pores sparse. Related to Lithobotrys? Diam. 70 µ.

Curved forms ought now to be eliminated from the generic characterization. (Translation from Latin by E.M.R. and W.R.R.)]
Remarks on original description: [= Lophophaena (?) obtusa [Ehrenberg]]

Species name. Differs at head of descriptive text (p. 77) and in chart (p. 63). In the former the question mark follows the generic name and in the latter it precedes the specific name.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within (-Ma, top in "Holocene" stage). Data source:
First occurrence (base): within (-Ma, base in "Holocene" stage). Data source:

Plot of occurrence data:

References:


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Dictyocephalus obtusa compiled by the radiolaria@mikrotax project team viewed: 18-8-2026

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