Zeugarocarpus Leng, Schönenb. et E.M.Friis

Plant Fossil Names Registry Number: PFN002824

Act LSID: urn:lsid:plantfossilnames.org:act:2824

Authors: Q. Leng, J. Schönenberger & E. M. Friis

Rank: genus

Reference: Leng, Q., Schönenberger, J. & Friis, E. M. (2005): Late Cretaceous follicular fruits from southern Sweden with systematic affinities to early diverging eudicots. – Botanical Journal of the Linnean Society 148(4): 377–407.

Page of description: 383

Type

Original diagnosis/description

Subunits composed of a pair of prophylls and a pair of follicles. Paired follicles with separate bases. Individual follicles shortly stalked or astipitate with a rounded apex. Ventral slit of follicles facing infructescence axis, extending for the entire length of follicle and over the topological apex to the abaxial side, where the stigma is located. Stigma double-crested with smooth surface. Follicle surface smooth, with scattered trichomes or glabrous. Follicle wall served by one dorsal and two lateral bundles. Placentation marginal-linear on each side of the ventral slit. Mature seeds anatropous and apparently bitegmic, ellipsoidal in shape, with rounded chalazal region, slightly acute micropylar region, distinct raphe and spiny surface. Testa forms mechanical layer. Tegmen thin and membranous.

Etymology

From Greek referring to the paired fruits.