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Sparganiaceaepollenites annulatus

Angiospermae - Poales - Typhaceae

Discussion

Referring to the presence of a conspicuous annulus

Taxonomy
Sparganiaceaepollenites annulatus was named by De Benedetti et al. (2023). Its type specimen is MPEF-PA 874, a microspore, and it is a 3D body fossil. Its type locality is Cerro Bosta (CBO) (Paleobotany), which is in a Maastrichtian marginal marine siltstone in the La Colonia Formation of Argentina.

Sister species lacking formal opinion data
S. reticulatus

Synonymy list
YearName and author
2023Sparganiaceaepollenites annulatus De Benedetti et al. p. 3

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RankNameAuthor
kingdomPlantae
phylumSpermatophyta
classAngiospermae
—Mesangiosperms
—Monocots
RankNameAuthor
orderPoales
familyTyphaceae
genusSparganiaceaepollenitesThiergart 1937
speciesannulatus

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

†Sparganiaceaepollenites annulatus De Benedetti et al. 2023
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Diagnosis
ReferenceDiagnosis
F. De Benedetti et al. 2023Pollen grain monoporate, amb circular to subcircular. Pore circular, ca. 1.5–4.0 μm diameter, annulate. Annulus 1.0–2.5 μm wide. Exine <1 μm thick, two layered, nexine thinner than sexine. Sexine semitectate, simplicolumellate, columellae fused laterally and apically forming a delicate reticulum; lumina subcircular, polygonal to irregular, up to 2 μm diameter; muri membranous, up to 0.3 μm wide and 0.5 μm high, with supratectal ridges or microechinae.
Measurements
No measurements are available
Diet: "photoautotroph"p
Created: 2011-07-22 00:04:15
Modified: 2011-07-21 09:04:15
Source: p = phylum
Reference: Kiessling 2009

Age range: Maastrichtian or 72.20000 to 66.00000 Ma

Collections (3 total)


Time interval Ma Country or state Original ID and collection number
Late/Upper Cretaceous - Early/Lower Paleocene100.5 - 61.66Argentina (Chubut) Sparganiaceaepollenites annulatus (195707)
Maastrichtian72.2 - 66.0Argentina (Chubut) Sparganiaceaepollenites annulatus (31653 type locality: 199410)