Basic info Taxonomic history Classification Included Taxa
Morphology Ecology and taphonomy External Literature Search Age range and collections

Aextoxicoxylon kawasianus

Magnoliopsida

Discussion

Etymology. The specific epithet kawasianus is proposed in reference to the Kawas Sea (Casamiquela, 1978), an inland sea of northern Patagonia resulting from the first Atlantic transgression during the Late CretaceouseDanian.

Taxonomy
Aextoxicoxylon kawasianus was named by Vera et al. (2020). Its type specimen is MPEF-PB 9911, a wood, and it is a 3D body fossil. Its type locality is Estancia María de las Nieves, which is in a Campanian/Maastrichtian fluvial sandstone/conglomerate in the Puntudo Chico Formation of Argentina.

Synonymy list
YearName and author
2020Aextoxicoxylon kawasianus Vera et al.

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomPlantae
phylumSpermatophyta
classMagnoliopsidaCronquist et al. 1996
RankNameAuthor
genusAextoxicoxylonNishida et al. 1988
specieskawasianus

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.

†Aextoxicoxylon kawasianus Vera et al. 2020
show all | hide all
Diagnosis
ReferenceDiagnosis
E. I. Vera et al. 2020Growth ring boundaries indistinct. Wood diffuseporous. Vessels mainly solitary or arranged in short radial multiples of 2 vessels. Perforation plates scalariform, with more than 40 bars. Intervessel pits scalariform to opposite. Vessel-ray parenchyma pits scalariform to opposite, with distinct borders. Fibers non-septate, with distinctly bordered pits. Rays 1e2 seriate. Biseriate rays with uniseriate margins up to seven cells tall, and central biseriate region up to five cells tall; rays often fused with adjacent ones (interconnected rays). Rays heterocellular, composed of procumbent central region and square/upright cells composing the margins. Ray frequency higher than twenty rays per mm.
Measurements
No measurements are available
No ecological data are available

Age range: base of the Late/Upper Campanian to the top of the Early/Lower Maastrichtian or 83.60000 to 66.00000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Late/Upper Campanian - Early/Lower Maastrichtian83.6 - 66.0Argentina (Chubut) Aextoxicoxylon kawasianus (type locality: 234763)