Pollen morphotypes from the intestine of a Permian booklouse

Two morphotypes of disaccate taeniate pollen grains Lunatisporites and Prot ohaploxypinus, and two types of monosaccate pollen grains, Florinites and P otonieisporites an recognized in the organic gut content of a primitive boo klouse Parapsocidium uralicum G. Zalessky (Psocidiidae, Psocida) from the T shekarda locality in the Urals. Details of infrastructure are described for Lunatisporites. Lamellate nexine was not observed in sectioned pollen grai n of Protohaploxypinus perfecta. Pollen grains with several to many taeniae are abundant in the gut, whereas other morphotypes are represented by a si ngle grain each. Such proportions are typical for pollinivorous insects fro m Tshekarda. Parapsocidium has shared its foraging habitat with another pol linivorous insect, Idelopsocus diradiatus Rasnitsyn (Hypoperlida). The latt er is considered as a representative of an extinct group ancestral to bookl ice. (C) 1999 Elsevier Science B.V. All rights reserved.