Trimanicula penultima Dumitrica 1991
Creators
- 1. Institute of Earth Sciences, Université de Lausanne, Géopolis, 1015 Lausanne, Switzerland; mailing address: Dennigkofenweg 33, 3073 Gümligen, Switzerland
Description
Trimanicula penultima Dumitrică, 1991
Figure 7b
1991 Trimanicula penultima Dumitrică, 1991, p. 54, pl. 3, fig. 5; pl. 4, fig. 2; pl. 8, figs. 7, 8; pl. 9, figs. 11-13.
Remarks. The species is very rare, represented until present by only the holotype. It evolved probably from the genus Patulibracchium Pessagno, its probable forerunner, by the reduction of the arms probably during the Cretaceous-Tertiary boundary crisis. Judging from the morphology of the holotype, it seems that it is a young specimen with the arms incompletely developed. This holotype differs from T. centrospina Dumitrică especially by the angle between the lateral primary rays that reaches 160°, rather close to that of some Campanian species of the genus Patulibracchium illustrated by Pessagno (1971).
Range and occurrence. Earliest Paleocene, DSDP 21- 208-31 CC, Lord Howe Rise, SW Pacific.
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Patulibrachiidae
- Genus
- Trimanicula
- Kingdom
- Animalia
- Order
- Spumellaria
- Scientific name authorship
- Dumitrica
- Species
- penultima
- Taxon rank
- species
- Taxonomic concept label
- Trimanicula penultima Dumitrica, 1991 sec. Dumitrica, 2019
References
- Dumitrica, P., 1991. Cenozoic Pyloniacea (Radiolaria) with a five-gated microsphere. Revue de micropaleontologie, 34 (1): 35 - 56.
- Pessagno, E. A., Jr., 1971. Jurassic and Cretaceous Hagiastridae from the Blake-Bahama Basin (Site 5 A, Joides Leg I) and the Great Valley Sequence, California Coast Ranges. Bulletin American Paleontology 60, no. 264: 5 - 83, pls. 1 - 19.