Itaquixylon heterogenum Benicio, E.F.Pires, Da Rosa, Spiekermann, D.Uhl et Jasper

Plant Fossil Names Registry Number: PFN000005

Act LSID: urn:lsid:plantfossilnames.org:act:5

Authors: J. R. W. Benicio, E. F. Pires, Á. A. S. Da Rosa, R. Spiekermann, D. Uhl & A. Jasper

Rank: species

Genus: Itaquixylon Benicio, E.F.Pires, Da Rosa, Spiekermann, D.Uhl et Jasper

Reference: Benicio, J. R. W., Pires, E. F., Da Rosa, Á. A. S., Spiekermann, R., Uhl, D. & Jasper, A. (2016): A new fossil Fabaceae wood from the Pleistocene Touro Passo Formation of Rio Grande do Sul, Brazil. – Fossil Imprint 72(3–4): 251–264.

Page of description: 254

Illustrations or figures: text-fig. 3, pl. 1, figs 1-6, pl. 2, figs 1-6

Name is type for

Types

Original diagnosis/description

Angiosperm wood, diffuse porosity, numerous vessels in tangential bands; vessels generally solitary, sometimes in radial multiples of 3 to 5, circular to oval in outline, with narrow diameter and short length, helical thickenings absent, tyloses present; simple perforation plates; alternate intervessel pits, vestured, circular, small with lenticular irregular aperture slightly oblique; vessel-ray pits and vessel-parenchyma pits bordered; libriform fibres, non-septate, extremely short and narrow, with simple minute pits; paratracheal axial parenchyma, vasicentric and scanty and apotracheal axial parenchyma diffuse; rays are nume. rous, exclusively heterocellular, composed of procumbent and square marginal cells, short and extremely narrow, simple pits of minute size; mostly uniseriate, less frequently biseriate and triseriate, rarely tetraseriate; aggregate rays are absent.

Etymology

The specific name, heterogenum, is due to the presence of heterocellular rays.

Stratigraphy

Quarternary, Pleistocene
Touro Passo Formation

Locality

Brazil
Itaqui city, Rio Grande do Sul State (29º23'55.9"S/56º42'05.9"W)