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Cheirolepidiaceae : ウィキペディア英語版 | Cheirolepidiaceae
Cheirolepidiaceae is a family of extinct coniferous plants. This family of conifers, superficially similar to Cupressaceae, was a significant part of the flora of the Mesozoic, around (Axsmith ''et al.'', 2004). They are united by the possession of a distinctive pollen type assigned to the form genus ''Classopollis''. The name Frenelopsidaceae (as a separate family) or "frenelopsids" has been used for a group of Cheirolepidiaceae with jointed stems, thick internode cuticles, sheathing leaf bases and reduced free leaf tips. Some species are thought to have been the first plants to be insect pollinated as they occur in association with extinct pollinating scorpionflies.〔Ren D, Labandeira CC, Santiago-Blay JA, Rasnitsyn A, Shih CK, Bashkuev A, Logan MA, Hotton CL, Dilcher D. (2009). Probable Pollination Mode Before Angiosperms: Eurasian, Long-Proboscid Scorpionflies. Science, 326 (5954), 840-847. 〕 ==References==
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