... discovered tropical genera Trigono-balanus Forman, Formanodendron Nixon and Crepet, and Colombobalanus Nixon and Crepet (Nixon, 1989; Nixon and Cre-pet, 1989). Cladistic analysis ... Longman,Rees, Orme, Brown and Green, LondonLoudon J (1835-1838) Arboretum et FruticetumBotanicum. Longman, Rees, Orme, Brown and Green, LondonNixon KC (1984) A Biosystematic ... capitatestigmas and cupules arranged along an el-ongate axis.Throughout mid- and late-Tertiary de-posits of the northern hemisphere, oak leafcompressions and impressions are abun-dant,...