Platanoid infructescences Friisicarpus kubaensis sp. nov. and leaves Ettingshausenia kubaensis sp. nov. from the Albian-Cenomanian of Chulym-Yenisei depression, Russia

Abstract

New species of an infructescence of Friisicarpus kubaensis N. Maslova, Tekleva & Sokolova and leaves of Ettingshausenia kubaensis N. Maslova & Sokolova, sp. nov. are described from the Albian-Cenomanian of Chulym-Yenisei depression, Russia. Similar epidermal characteristics and joint co-occurrence of the described infructescences and leaves imply that the leaves and infructescences belong to the same plant.

Platanaceous reproductive structures and leaves from the Cretaceous of Kundur, Amur Region, Russia

“…As a rule, epidermal cells of the axis are tetragonal and arranged in regular longitudinal rows. This is true for Cretaceous genera Friisicarpus (Maslova et al, 2011;, Sarbaicarpa N. Maslova, 2009, Sarbaicarpales (Maslova, 2009 and modern Platanus. Trichomes on the axis of reproductive structures are described for the modern Platanaceae and some Proteaceae (Carpenter et al, 2005).…”

“…As a rule, reproductive structures similar in macromorphology have a thin axis, covered by trichomes in a varying degree. So, the axis is strongly hairy in Albian-Cenomanian Friisicarpus kubaensis N. Maslova, Tekleva & Sokolova, 2011(Maslova et al, 2011 and Senonian F. sarbaensis N. . On the contrary, trichomes are absent on the axis of Kunduricarpus longistylium gen. et sp.…”

“…Such a correlation was also observed in the Platanaceae (Crane, 1989;Drinnan et al, 1994;Magallón-Puebla et al, 1997, and others). As a rule, in the fossil Platanaceae with a well-developed perianth the number of reproductive organs is constant within the flower (Manchester, 1986;Friis et al, 1988;Pigg & Stockey, 1991;Crane et al, 1993;Pedersen et al, 1994;Maslova & Herman, 2006;Maslova et al, 2011;Maslova & Tekleva, 2012, and others). On the contrary, Platanus species is characterized by a weakly developed perianth or its absence and by various number of reproductive organs in the flower (Boothroyd, 1930).…”

“…Among extinct Platanaceae the infructescences of Macginicarpa have peduncles. Species of the Late Cretaceous genus Friisicarpus N. Maslova & Herman, 2006(Friis et al, 1988Maslova et al, 2011; are characterized by sessile heads.…”

“…It is known that the only modern genus Platanus L., 1754 is a remnant of the once diverse family with the peak in the Cretaceous. Among Cretaceous reproductive structures referred to the Platanaceae there are capitate infructescences (Manchester, 1986;Crane et al, 1988;Friis et al, 1988;Crane et al, 1993;Magallón-Puebla et al, 1997;Maslova & Herman, 2006;Tschan et al, 2008;Wang, 2008;Maslova et al, 2011;Wang et al, 2011; and capitate staminate inflorescences (Krassilov, 1973;Manchester, 1986;Crane et al, 1988;Friis et al, 1988;Pigg & Stockey, 1991;Crane et al, 1993;Pedersen et al, 1994;Krassilov & Shilin, 1995;Magallón-Puebla et al, 1997;Maslova, 2002;Maslova & Kodrul, 2003;Mindell et al, 2006;Tschan et al, 2008). Maslova (2010) proposed a new system of fossil platanoids and hamamelids which includes both modern (Platanaceae and Hamamelidaceae) and extinct families (Bogutchantaceae, Sarbaicarpaceae and Kasicarpace-ae).…”