Cassigerinelloita


Classification: pf_cenozoic -> Guembelitrioidea -> Guembelitriidae -> Cassigerinelloita
Sister taxa: Cassigerinelloita, Globoconusa, Guembelitria, Jenkinsina, Parvularugoglobigerina, Woodringina
Daughter taxa: (blue => in age window 0-800Ma)
Cassigerinelloita amekiensis
Test small, subglobular, with a rotating triserial axis of coiling, indistinguishable umbilicus and often indistinguishable primary aperture.
Cassigerinelloita sp.
Specimens which cannot be assigned to established species

Taxonomy

Citation: Cassigerinelloita Stolk, 1965, emended Li and Radford, 1992
Rank: Genus
Type species: Cassigerinelloita amekiensis Stolk, 1965
Taxonomic discussion: Cassigerinelloita was described by Stolk (1965) as belonging to the Cassigerinellidae, despite the fact that the chamber arrangement is not biserial. Loeblich and Tappan (1988) tentatively placed Cassigerinelloita in the Catapsydracidae because of a “microcancellate” wall and presence of bullae. Placement in the Family Guembelitriidae was suggested by Li and Radford (1992) based on the presence of a microperforate, pustulate wall, strongly inflated chambers, and the peculiar triserial coiling mode.
[Huber et al. 2006]

Catalog entries: Cassigerinelloita

NB These concise distinguishing features statements are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus.
They are being edited as the site is developed and comments on them are especially welcome.

Description


Wall type: Microperforate and pustulose; [Huber et al. 2006]

Biogeography and Palaeobiology


Phylogenetic relations: Li and Radford (1992) suggested that Jenkinsina triseriata is directly ancestral to C. amekiensis based on similarity of wall texture and stratigraphic overlap of the two species.
[Huber et al. 2006]

Most likely ancestor: Jenkinsina - at confidence level 3 (out of 5). Data source: Olsson et al. 1999.

Biostratigraphic distribution

Geological Range:
Notes: Upper lower – lower middle Eocene; lower Zone E7 - upper Zone E9 at low latitudes. First occurs at the base of Zone AE4 at high southern latitudes, which may be slightly earlier than at low latitudes, though the lower range in tropical-subtropical regions is not well documented.
[Huber et al. 2006]
Last occurrence (top): in upper part of Lutetian Stage (69% up, 43.2Ma, in Lutetian stage). Data source: Total of range of species in this database
First occurrence (base): in upper part of Ypresian Stage (71% up, 50.2Ma, in Ypresian stage). Data source: Total of range of species in this database

Plot of occurrence data:

Primary source for this page: Huber et al. 2006 - Eocene Atlas, chap. 16, p. 470

References:

Huber, B. T., Olsson, R. K. & Pearson, P. N. (2006). Taxonomy, biostratigraphy, and phylogeny of Eocene microperforate planktonic foraminifera (Jenkinsina, Cassigerinelloita, Chiloguembelina, Streptochilus, Zeauvigerina, Tenuitella, and Cassigerinella) and Problematica (Dipsidripella). In, Pearson, P. N. , Olsson, R. K. , Hemleben, C. , Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 41(Chap 16): 461-508. gs V O

Li, Q. & Radford, S. S. (1992). Morphology and affinity of the planktonic foraminifer Cassigerinelloita amekiensis Stolk and reclassification of Cassigerinelloita Stolk. Proceedings of the Ocean Drilling Program, Scientific Results. 120: 595-602. gs

Loeblich, A. R. & Tappan, H. (1988). Foraminiferal Genera and Their Classification (Volume I-II). Van Nostrand Reinhold Co., New York. 1-1059. gs

Stolk, J. (1965). Contribution à l'étude des corrélations microfaunique do Tertiaire inférieur de la Nigèrie méridionale. Mémoires du Bureau de Recherches Géologiques et Minières. 32: 247-267. gs


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Cassigerinelloita compiled by the pforams@mikrotax project team viewed: 28-10-2020

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