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Palmoxylon pichaihuensis

Angiospermae - Arecaceae

Taxonomy
Palmoxylon pichaihuensis was named by Ottone (2007). Its type specimen is BAFC-Pb 16945, a wood, and it is a 3D body fossil. Its type locality is Pichaihue (PI) - Paleobotany, which is in a Danian coastal shale/siltstone in the Pichaihue Limestone Formation of Argentina.

Sister species lacking formal opinion data
P. bacillare, P. cheyennense, P. hislopi, P. phytelephantoides, P. quenstedi, P. sundaram

Synonymy list
YearName and author
2007Palmoxylon pichaihuensis Ottone p. 720 figs. 2.1-2.5

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RankNameAuthor
kingdomPlantae
phylumSpermatophyta
classAngiospermae
—Mesangiosperms
RankNameAuthor
—Monocots
familyArecaceaevon Berchtold and Presl 1820
genusPalmoxylonSchenk 1882
speciespichaihuensis

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.

†Palmoxylon pichaihuensis Ottone 2007
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Diagnosis
ReferenceDiagnosis
E. G. Ottone 2007Cortex not clearly observed. Peripheral zone (possible dermal to subdermal zones) with densely crowded fibrovascular bundles (ca. 175-195/cm2 ) with abaxial (externally orientated) reniform sclerenchyma; xylem with 1-5 large metaxylem
vessels, f/v ratio ca. 3:1; protoxylem and phloem not preserved. Central zone with less congested fibrovascular bundles (ca. 85-105/cm2), randomly disposed or occasionally arranged in irregular circles; sclerenchyma reniform; xylem with 1-4 large metaxylem vessels showing scalariform wall thickenings, and 6-12 smaller protoxylem elements with helical thickenings; f/v ratio of 1.3-2: 1, commonly 1.5-1.6:1; phloem badly preserved. Fibrous bundles absent. Ground tissue poorly preserved.
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: Danian or 66.00000 to 61.66000 Ma

Collections (2 total)


Time interval Ma Country or state Original ID and collection number
Late/Upper Maastrichtian - Danian72.2 - 61.66Argentina (Neuquén) Palmoxylon pichaihuensis (241077)
Danian66.0 - 61.66Argentina (Neuquén) Palmoxylon pichaihuensis (type locality: 241392)