Nannotax3 - Mesozoic - Pocillithus

Pocillithus

Classification: Mesozoic -> Heterococcoliths inc sedis -> Papposphaeraceae -> Pocillithus
Sister taxa: Pocillithus,

Distinguishing features: Minute muroliths with prominent spine, rim non-imbricate typically with serrated distal margin.

Daughter taxa: (blue => in age window 0-800Ma)
				Pocillithus crucifer rim low with smooth distal margin; central area spanned by cross-bars
				Pocillithus macleodii rim high, with serrated distal margin,;central area narrow without crossbars
				Pocillithus sp.

Taxonomy:

Citation: Pocillithus Dunkley Jones, Bown & Pearson 2009

Rank: Genus

Type species: Pocillithus spinulifer Dunkley Jones et al. 2009

Notes & discussion: Pocillithus was described from the Palaeogene but these Turonian species, appear to be very simialr. Placement in the Pappposphaeraceae (an extant family with a very poor fossil record) is more tentative but seems reasonable based on morphology, size and co-occurrence with other deep photic taxa (in Palaeogene). Interestingly P. macleodii shows the serrated rim margin typical of most modern Papposphaeraceae, but not shown by the Paleogene species P. spinulifer.

Farinacci & Howe catalog pages: Pocillithus * ,

Distinguishing features: Minute muroliths with prominent spine, rim non-imbricate typically with serrated distal margin.

Geological Range:
Last occurrence (top): at top of Turonian Stage (100% up, 89.8Ma, in Turonian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Turonian Stage (0% up, 93.9Ma, in Turonian stage). Data source: Total of range 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: Papposphaeraceae

References:

Dunkley Jones, T., Bown, P. R. & Pearson, P. (2009). Exceptionally well preserved upper Eocene to lower Oligocene calcareous nannofossils (Prymnesiophycidae) from the Pande Formation (Kilwa Group), Tanzania. Journal of Systematic Palaeontology. 7(4): 359-411. gs

Pocillithus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 24-7-2019

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10914 Go to Archive.is to create a permanent copy of this page - citation notes

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