Cunninghamia nakatonbetsuensis S.Jiang et T.Yamada in Jiang, Shigeta, Matsunaga & Yamada

Plant Fossil Names Registry Number: PFN003626

Act LSID: urn:lsid:plantfossilnames.org:act:3626

Authors: S. Jiang & T. Yamada

Rank: species

Reference for this name: Jiang, S., Shigeta, Y., Matsunaga, K. K.S. & Yamada, T. (2024): A new species of Cunninghamia (Cupressaceae) from the Upper Cretaceous (Maastrichtian) of Hokkaido, Japan. – Phytotaxa 664(1): 1–11., link

Page of description: 2

Illustrations or figures: Figs 1–4

Types

Original diagnosis/description

Diagnosis:—Seed cone ovoid, ca. 35 mm long and ca. 30 mm wide. Bract-scale complexes swollen to form a mound around the apical third, supplied with a single vascular strand from cone axis, which firstly divides into abaxial and central adaxial bundles; central adaxial bundle bifurcating once horizontally; abaxial bundle dividing horizontally into 8–10 smaller bundles; 2 lateral adaxial bundles, each branched from abaxial bundle on a lateralmost side; resin canal placed both adaxial and abaxial to the vascular strands. Ovuliferous scale fused to bract except for each lateral margin; apical part trilobed.

Etymology

The specific epithet is named after the town where the sample was collected.

Stratigraphy

Cretaceous, Lower Cretaceous
The lower Maastrichtian Heitaro-zawa Formation of the Hakobuchi Group.

Locality

Japan
Heitaro-zawa Creek in Nakatonbetsu town, Hokkaido (44.980°N, 142.252°E).