Eydeia hokkaidoensis Stockey, H.Nishida et B.A.Atk.

Plant Fossil Names Registry Number: PFN001900

Act LSID: urn:lsid:plantfossilnames.org:act:1900

Authors: R. A. Stockey, H. Nishida & B. A. Atkinson

Rank: species

Genus: Eydeia Stockey, H.Nishida et B.A.Atk.

Reference: Stockey, R. A., Nishida, H. & Atkinson, B. A. (2016): Anatomically preserved fossil cornalean fruits from the Upper Cretaceous of Hokkaido: Eydeia hokkaidoensis gen. et sp. nov.American Journal of Botany 103(9): 1642–1656., link

Page of description: 1643

Illustrations or figures: figs 3–35

Name is type for

Eydeia Stockey, H.Nishida et B.A.Atk. 2016


Holotype 840208 C bot a, Chuo University, Tokyo, Japan
Figures: figs 3, 8–12, 14–16, 21–31, 33–35

Note: Paratypes: 840208 C bot b, 832489, 851051, 960051 (Chuo University, Tokyo, Japan).

Original diagnosis/description

Fruits pyriform, without apical depression, stylar canal four- to five-armed. Septal ridges and ridges on valve present; septal ridges more pronounced. Central axis with elongate, large diameter sclereids in center. Transition sclereids, one to three layers, between endocarp and mesocarp. Mesocarp lacking sclereids, with outer zone of radially elongate parenchymatous cells, inner zone of smaller cells. At least one vascular bundle parallel to each germination valve ridge between mesocarp and endocarp. Locule lining of one to two rows of longitudinally elongate fi bers, square to rectangular in cross section. Seed coat uniseriate with prominent cuticle. Endosperm with copious contents. Cotyledons of embryo flat, closely appressed, with three vascular bundles.


The specific epithet refers the island of Hokkaido where these specimens were found.


Cretaceous, Upper Cretaceous, Santonian
Haborogawa Formation


Sankebetsugawa (Sankebetsu River bed), Tomamae area, Hokkaido, Japan. (44°20′N, 141°55′E).

Plant fossil remain

macro- and meso-fossils-embryophytes except wood


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