radiolaria - rads_cenozoic - Lophophaena simplex radiolaria - rads_cenozoic - Lophophaena simplex

Lophophaena simplex


Classification: rads_cenozoic -> Plagiacanthidae -> Lophophaenidae -> Lophophaena -> Lophophaena simplex
Sister taxa: L. apiculata, L. arctissa, L. arie, L. buetschlii, L. capito, L. circumtexta, L. clevei, L. cylindrica, L. decacantha, L. galeaorci, L. hispida, L. josephinus, L. macrencephala, L. mugaica, L. nadezdae, L. polycyrtis, L. radians, L. rioplatensis, L. sibirica, L. simplex, L. tekopua, L. thaumasia, L. variabilis, L. witjazii, Lophophaenoma, L. sp., Lophophaenoma sp.

Taxonomy

Citation: Lophophaena simplex Funakawa 1994
taxonomic rank: species
Basionym: Lophophaena simplex Funakawa 1994
Synonyms:
1994 Lophophaena simplex - Funakawa p.465-466; pl.8, fig.1a-2c

Catalog entries: Lophophaena simplex

Original description: The first segment is subspherical to ellipsoidal. One to four (occasionally more) robust horns that are unrelated to the apical rib are on the shell. These horns are shorter than the half-height of the first segment. The apical horn and ventral horn are unbladed and poorly developed. Pores in the first segment are circular to subcircular and randomly arranged. Axial projection is present and in some specimens it is well-developed like a spine. The second segment is bell-shaped with indistinct dorsal and lateral ribs, without feet extended from them. In most specimens, there are many external unrelated to internal spicules on the lower part of the second segment. Pores in the second segment are circular to subcircular and randomly arranged but in the lower part are arranged weakly along longitudinal ribs. The distal end of the second segment is open with teeth, but in some specimens, tends to be closed by a porous piate. Surface of the second segment is without spines.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

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

Plot of occurrence data:

References:

Funakawa, S. (1994). Plagiacanthidae (Radiolaria) from the Upper Miocene of eastern Hokkaido, Japan. Transactions and Proceedings of the Palaeontological Society of Japan. 174: 458-483. gs


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Lophophaena simplex compiled by the radiolaria@mikrotax project team viewed: 20-6-2024

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