A more recent study on Craigia (Malvaceae, Miocene) focused on orbicules and pollenkitt (Zetter et al., 2002).
Pollen, pollenkitt, and orbicules in Craigia bronnii flower buds (Tilioideae, Malvaceae) from the Miocene of Hambach, Germany.
For example, winged fruits of Craigia, a genus now confined to eastern Asia, occur in the Tertiary of North America and Europe, but the fossils were formerly considered to represent an extinct genus, Pteleaecarpum Weyland (Buzek et al., 1989), until identity with living Craigia was discovered (Kvacek et al., 1991).
They are borne on trees (e.g., Cavanellesia, Craigia, Balfourodendron), shrubs (e.g., Maxwellia, Phaeoptilum, Wimmeria) vines (e.g., Cucurbitaceae, Dioscoreaceae, Kleinhovia, Triptergium, Urvillea) and herbs (e.g., Abronia, Polygonum, Stackhousia).
Fossil Malvaceae Fin-winged fruits of Craigia were widespread in the Tertiary of the Northern Hemisphere and have been traced to the Eocene in eastern Asia and western North America (Kvacek et al., 2005).