3D models from The Foraminarium, hosted on sketchfab
As shown already by Parker (1962), the characteristic chamber elongation is less well developed in small specimens. This has led some authors (e.g. Aze et al., 2011) to separate these forms as Beella megastoma (Earland, 1934) or consider the extinct ancestral Beella praedigitata (Parker, 1967) to persist to the present. The existence of the homonymous Hastigerinella digitata (Rhumbler, 1911) has created some confusion in the past, with both species being occasionally assigned to the same genera (Globigerinella, Hastigerina). [Brummer & Kucera 2022]
Catalog entries: Globigerina digitata, Beella chathamensis, Beella guadalupensis, Hastigerinella frailensis
Type images:Distinguishing features:
Parent taxon (Beella): Digitate chambers:
This taxon: Chambers elongate, in adult specimens
Morphology:
Wall type:
Character matrix
test outline: | Stellate | chamber arrangement: | Trochospiral | edge view: | Inequally biconvex | aperture: | Umbilical-extraumbilical |
sp chamber shape: | Elongate | coiling axis: | Low | periphery: | N/A | aperture border: | Thin flange |
umb chbr shape: | Elongate | umbilicus: | Wide | periph margin shape: | Broadly rounded | accessory apertures: | None |
spiral sutures: | Moderately depressed | umb depth: | Deep | wall texture: | Cancellate | shell porosity: | Macroperforate: >2.5µm |
umbilical or test sutures: | Strongly depressed | final-whorl chambers: | 4-5 | N.B. These characters are used for advanced search. N/A - not applicable |
In modern oceans a common, temperate water, species [SCOR WG138]
Geographic distribution
Most likely ancestor: Beella praedigitata - at confidence level 3 (out of 5). Data source: Kennett & Srinivasan 1983;Aze et al. 2011.
Likely descendants: Beella megastoma;
plot with descendants
Geological Range:
Last occurrence (top): Extant. Data source: present in the plankton (SCOR WG138)
First occurrence (base): within N22 zone (0.00-1.93Ma, base in Gelasian stage). Data source: Chaisson & Pearson (1997)
Plot of occurrence data:
Primary source for this page: Kennett & Srinivasan 1983, p.232
André, A. et al. (2014). SSU rDNA Divergence in Planktonic Foraminifera: Molecular Taxonomy and Biogeographic Implications. PLoS One. 9: e104641-. gs Aze, T. et al. (2011). A phylogeny of Cenozoic macroperforate planktonic foraminifera from fossil data. Biological Reviews. 86: 900-927. gs Brady, H. B. (1879). Notes on some of the rerticularian rhizopoda of the "Challenger" Expedtion. II Additions to the knowledge of porcellaneous and hyaline types. Quarterly Journal of Microscopical Science. 19: 261-299. gs Brummer, G-J. A. & Kucera, M. (2022). Taxonomic review of living planktonic foraminifera. Journal of Micropalaeontology. 41: 29-74. gs Coxall, H. K., Wilson, P. A., Pearson, P. N. & Sexton, P. F. (2007). Iterative evolution of digitate planktonic foraminifera. Paleobiology. 33: 495-516. gs Kennett, J. P. & Srinivasan, M. S. (1983). Neogene Planktonic Foraminifera. Hutchinson Ross Publishing Co., Stroudsburg, Pennsylvania. 1-265. gs Lam, A. & Leckie, R. M. (2020a). Late Neogene and Quaternary diversity and taxonomy of subtropical to temperate planktic foraminifera across the Kuroshio Current Extension, northwest Pacific Ocean. Micropaleontology. 66(3): 177-268. gs Loeblich, A. & Tappan, H. (1994). Foraminifera of the Sahul shelf and Timor Sea. Cushman Foundation for Foraminiferal Research, Special Publication. 31: 1-661. gs O Norris, R. D. (1998). Planktonic foraminifer biostratigraphy: Eastern Equatorial Atlantic. Proceedings of the Ocean Drilling Program, Scientific Results. 159: 445-479. gs O Parker, F. L. (1962). Planktonic foraminiferal species in Pacific sediments. Micropaleontology. 8(2): 219-254. gs Saito, T., Thompson, P. R. & Breger, D. (1976). Skeletal ultra-microstructure of some elongate-chambered planktonic foraminifera and related species. In, Takayanagi, Y. & Saito, T. (eds) Progress in Micropaleontology, Special Publication. Micropaleontology Press, The American Museum of Natural History, New York 278-304. gs Siccha, M. & Kucera, M. (2017). ForCenS, a curated database of planktonic foraminifera census counts in marine surface sediment samples. Scientific Data. 4(1): 1-12. gs Weiner, A. K. M., Weinkauf, M. F. G., Kurasawa, A., Darling, K. F., Kucera, M. & Grimm, G. W. (2014). Phylogeography of the tropical planktonic foraminifera lineage Globigerinella reveals isolation inconsistent with passive dispersal by ocean currents. PLoS One. 9: e92148-. gs References:
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Beella digitata compiled by the pforams@mikrotax project team viewed: 18-2-2025
Short stable page link: https://mikrotax.org/pforams/index.php?id=104002 Go to Archive.is to create a permanent copy of this page - citation notes |