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Neogene Leaf Morphotaxa of Malvaceae s.l. in Europe

2010; University of Chicago Press; Volume: 171; Issue: 8 Linguagem: Inglês

10.1086/655866

1537-5315

Grzegorz Worobiec, Elżbieta Worobiec, Zlatko Kvaček,

Plant Taxonomy and Phylogenetics

New interpretation of leaf fossils from the Neogene of Europe belonging to the family Malvaceae s.l. is given. Morphogenera Dombeyopsis Unger emend., Byttneriophyllum Givulescu ex Knobloch et Kvaček, and Laria G. Worobiec et Kvaček morphogen. nov., considered monotypic in our revision, are newly circumscribed. Particularly well‐preserved leaves representing Dombeyopsis lobata Unger (Auenheim); Byttneriophyllum tiliifolium (A. Braun) Knobloch et Kvaček from Bełchatów and Ruja, Poland; and Laria rueminiana (Heer) G. Worobiec et Kvaček comb. nov. from Bełchatów were examined for detailed macro‐ and micromorphological studies. A survey of epidermal features and leaf macromorphology in extant Malvaceae s.l. was conducted for comparison with the fossils. All three fossil species studied are malvalean, but none of them corresponds in all details with any of the studied living Malvaceae s.l. Macro‐ and micromorphology of leaves suggest that D. lobata has affinities to subfamily Tilioideae Arn., B. tiliifolium probably belongs to Tilioideae Arn. or Brownlowioideae Burrett, and L. rueminiana presumably represents subfamily Helicteroideae Griseb.