Sueria laxinervis, a new fossil species of Cycadales from the Upper Cretaceous Quiriquina Formation in Cocholgüe, Bíobío Region, Chile | Zendy

Toshihiro Yamada | Zendy; TAKAE F. YAMADA | Zendy; Kazuo Terada | Zendy; Takeshi Ohsawa | Zendy; Atsushi Yabe | Zendy; Julien Legrand | Zendy; Kazuhiko Uemura | Zendy; Marcelo Leppe | Zendy; Luis Felipe Hinojosa | Zendy; Patricio LópezSepúlveda | Zendy; Harufumi Nishida | Zendy

Open Access

Sueria laxinervis, a new fossil species of Cycadales from the Upper Cretaceous Quiriquina Formation in Cocholgüe, Bíobío Region, Chile

Author(s) -

Toshihiro Yamada,

TAKAE F. YAMADA,

Kazuo Terada,

Takeshi Ohsawa,

Atsushi Yabe,

Julien Legrand,

Kazuhiko Uemura,

Marcelo Leppe,

Luis Felipe Hinojosa,

Patricio LópezSepúlveda,

Harufumi Nishida

Publication year - 2019

Publication title -

phytotaxa

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.443

H-Index - 36

eISSN - 1179-3163

pISSN - 1179-3155

DOI - 10.11646/phytotaxa.402.2.7

Subject(s) - cycad , cretaceous , biology , botany , eudicots , paleontology , taxonomy (biology)

A new fossil cycad species, Sueria laxinervis , is described from the Upper Cretaceous (Maastrichtian) Quiriquina Formation in Cocholgue, Biobio Region, Chile. The generic assignment is supported by the taeniopterid-type leaf with haplocheilic stomata and sinuate anticlinal walls of leaf epidermal cells, while S . laxinervis clearly differs from the other two described Sueria species in its sparse veins and large epidermal cells. The vascular bundles of the midrib are arranged in an inverted-omega shape, supporting the placement of Sueria in Cycadales.

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