Araripestrobus Seyf., E.A.Roberts, A.R.Schmidt et L.Kunzmann in Seyfullah, Roberts, Schmidt, Ragazzi, Anderson, do Nascimento, da Silva Filho & Kunzmann

Plant Fossil Names Registry Number: PFN002727

Act LSID: urn:lsid:plantfossilnames.org:act:2727

Authors: L. J. Seyfullah, E. A. Roberts, A. R. Schmidt & L. Kunzmann

Rank: genus

Reference: Seyfullah, L. J., Roberts, E. A., Schmidt, A. R., Ragazzi, E., Anderson, K. B., do Nascimento, D. R., Jr., da Silva Filho, W. F. & Kunzmann, L. (2020): Revealing the diversity of amber source plants from the Early Cretaceous Crato Formation, Brazil. – BMC Evolutionary Biology 20: 107 (22 pp.).

Page of description: 4

Type

Original diagnosis/description

Large (up to 170 mm long and 74 mm wide) microsporangiate pedunculate cones, appearing ‘segmented’ or organized into distinct layers in lateral outer surface view, built up of about 10 disc-shaped cone portions and a basal and apical cone portion with dome-shaped apex and base respectively, gaps present between the layered portions. Peduncle robust, short, diameter about 1/3 of the cone diameter. Detached microsporophylls leave rhomboidal scars with a central impression of a possible vascular bundle. Individual cone portions found detached more or less trapezoid to diamond-shaped in cross-section with a longer and a shorter diameter and the cone axis subcentrally; outer margins frequently arc-shaped in cross-sectional view. Slender, wedge-shaped microsporophylls, in dense facetted arrangement, generally in helical phyllotaxis; particularly each cone portion with 2–4 levels of microsporophylls, in alternating positions in adjacent levels. Each microsporophyll with 10 or more longitudinally running resin canals. In situ pollen of Eucommiidites-type, boat-shaped, ‘trisulcate’, surface finely perforate, smooth to microrugulate; microfossulae between perforations.

Etymology

From the Araripe Basin, where the Crato Formation flora originates.