pforams@mikrotax - Alicantina

pforams@mikrotax - Alicantina pforams@mikrotax - Alicantina

Alicantina

Classification: pf_cenozoic -> Truncorotaloididae -> Alicantina
Sister taxa: Alicantina, Acarinina, Praemurica ⟩⟨ Igorina, Pearsonites, Planorotalites, Astrorotalia ⟩⟨ Morozovella, Morozovelloides

Daughter taxa (time control age-window is: 0-800Ma)
			Alicantina prolata Like A. lozanoi but test smaller with 4–5 chambers in the final whorl, looser coiling and a lower spire.
			Alicantina lozanoi Moderately high, evolute, trochospiral test, 5-6 globular chambers in final whorl; predominantly, intraumbilical aperture.

Taxonomy

Citation: Alicantina Soldan et al. 2018

taxonomic rank: Genus

Taxonomic discussion: The genus Alicantina was proposed by Soldan et al. 2018 for a pair of species (lozanoi) tentatively included in Praemurica by Breggren et al. 2006. They further argued that G. prolata which had been included in P. lozanoi by Berggren et al. 2006 was a discrete species, also assignable to their new genus Alicantina. [editor's comment - JRY 2019]

Catalog entries: Alicantina

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

Morphology:

Trochospiral test, with moderate coiling axis; equatorial periphery moderately elongate to subcircular and the internal spire tends to increase in height; peripheral mar- gin broadly rounded; in spiral view 4–6 (rarely 7) globular chambers in the last whorl increase gradually in size as added; spiral sutures slightly curved to straight, depressed; in um- bilical view chambers subtriangular with strongly depressed, straight sutures; umbilicus deep and medium sized, aperture wide generally intraumbilical, tending to extend extraumbilically; aperture a distinct low to moderately high arch. [Soldan et al. 2018]

Wall type:

Non-spinose, dutertrei-type, irregularly cancellate.

Biogeography and Palaeobiology

Phylogenetic relations

Alicantina n. gen. evolved in the early Eocene presumably from a parasubbotinid-like taxon possessing a non-spinose wall texture and left no descendants. [Soldan et al. 2018]

Biostratigraphic distribution

Geological Range:
Last occurrence (top): at top of E10 zone (100% up, 41.9Ma, in Lutetian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within E4 zone (52.54-54.61Ma, base in Ypresian stage). Data source: Total of ranges of species in this database

Plot of occurrence data:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Truncorotaloididae

References:

Berggren, W. A., Olsson, R. K. & Premoli Silva, I. (2006a). Taxonomy, biostratigraphy and phylogenetic affinities of Eocene Astrorotalia, Igorina, Planorotalites, and Problematica (Praemurica? lozanoi). 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 12): 377-400. gs

Soldan, D., Petrizzo, M. R. & Premoli Silva, I. (2018). Alicantina, a new Eocene planktonic foraminiferal genus for the lozanoi group. Journal of Foraminiferal Research. 38(1): 41-52. gs

Alicantina compiled by the pforams@mikrotax project team viewed: 14-12-2024

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Short stable page link: https://mikrotax.org/pforams/index.php?id=104399 Go to Archive.is to create a permanent copy of this page - citation notes

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