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Wintucycas stevensonii

Cycadopsida - Cycadales - Zamiaceae

Taxonomy
Wintucycas stevensonii was named by Martínez et al. (2012). Its type specimen is MUCPb-369, a wood, and it is a 3D body fossil. Its type locality is Salitral Ojo de Agua (general), which is in a Maastrichtian fluvial sandstone in the Allen Formation of Argentina. It is the type species of Wintucycas.

Synonymy list
YearName and author
2012Wintucycas stevensonii Martínez et al. p. 438 figs. 2-5

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RankNameAuthor
kingdomPlantae
subkingdomEmbryophyta
phylumCycadophytaBessey 1907
classCycadopsidaBrongniart 1843
orderCycadalesDumortier 1829
RankNameAuthor
familyZamiaceaeHoraninow 1834
subfamilyEncephalartoideaeStevenson
genusWintucycas
speciesstevensonii

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.

†Wintucycas stevensonii Martínez et al. 2012
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Diagnosis
ReferenceDiagnosis
L. C. A. Martínez et al. 2012A columnar and polyxylic stem, covered by persistent rhomboidal leaf bases. A wide and parenchymatous central pith with mucilage canals, idioblasts and medullary vascular bundles. The secondary vascular cylinder comprises a medullary vascular system and a cylindrical vascular system. The medullary vascular system is composed of many medullary vascular bundles. The cylindrical vascular system has concentric rings of secondary xylem and phloem toward the cortex, and centripetal bundles adjacent to the innermost ring. Manoxylic secondary xylem, with homocellular, multiseriate rays one to four cells wide. Secondary phloem with parenchyma cells and abundant mucilage canals. Cortex composed of parenchyma cells and idioblasts, mucilage canals and girdling leaf traces. Foliar traces with an elaborated omega pattern. Leaf bases with simple and unbranched trichomes on the adaxial side.
Measurements
No measurements are available
No ecological data are available

Age range: Maastrichtian or 72.20000 to 66.00000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Maastrichtian72.2 - 66.0Argentina (Río Negro) Wintucycas stevensonii (type locality: 28459)