Pentakonos diminutus F.Herrera, G.Shi, P.Knopf, A.B.Leslie, Ichinnorov, Mas.Takah. et Herend.

Plant Fossil Names Registry Number: PFN003596

Act LSID: urn:lsid:plantfossilnames.org:act:3596

Authors: F. Herrera, G. Shi, P. Knopf, A. B. Leslie, N. Ichinnorov, M. Takahashi & P. S. Herendeen

Rank: species

Genus:

Reference for this name: Herrera, F., Shi, G., Knopf, P., Leslie, A. B., Ichinnorov, N., Takahashi, M. & Herendeen, P. S. (2017): Cupressaceae conifers from the early cretaceous of Mongolia. – International Journal of Plant Sciences 178(1): 19–41.

Page of description: 21

Original diagnosis/description

As for the genus with the following additions. Seed cone small, ca. 6.6–7.0 mm long, ca. 4.7–6.4 mm wide, more or less elliptical to slightly obovate in lateral out line. Bract-scale complexes ca. 2.6–3.2 mm long, 1.9–3.0 mm wide, 47–57 mm thick, borne at acute angles, ca. 557–307. Base of bract cuneate, apex mucronate. Margin thinner (!35 mm thick) than rest of the bract, winglike, with irregularly spaced and acute teeth. Ovuliferous scale located in the distal third of the bract, free, and forming a single, thin, broad, arc-like membranous structure. Seeds with a short tubular micropyle. Seed scars rounded, elliptical to triangular.

Etymology

The specific epithet diminutus refers to the small size of the seed cones.

Stratigraphy

Cretaceous, Lower Cretaceous
Tevshiin Govi Formation, Aptian-Albian stage, Early Cretaceous.

Locality

Mongolia
Tevshiin Govi coal mine, central Mongolia (lat. 457580 5400N, long. 1067070 1200E).