Cylostrobus Gen. Nov., cones of lycopsidean plants from the Narrabeen group (Triassic) of New South Wales

Abstract

Lycopsidean cones are described from the Collaroy Claystone in the Narrabeen Group (Lower Triassic) of New South Wales. The genus Cylostrobus Helby & Martin is described as new and to it are assigned the species C. sydneyensis (Walkom) comb. nov., C. major sp. nov., and C. grandis sp. nov. To this genus are ascribed certain megaspores of the Banksisporites Dettmann type and microspores of the Aratrisporites Leschik type.. Various megascopic remains of lycopsidean plants from the Narrabeen Group are listed. It is suggested that Lycopsida of at least subarborescent dimensions were of world-wide distribution in the Triassic. Banksisporites and Aratrisporites are of wide distribution and may have been produced by more than one kind of plant.