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Journal of Palaeogeography
Fig. 6 | Journal of Palaeogeography

Fig. 6

From: Spirematospermum wetzleri (Heer) Chandler (Zingiberaceae) from the Miocene of Weichang, Hebei Province, North China and the phytogeographic history of the genus

Fig. 6

Distribution and probable spreading map of Spirematospermum during the geological times. I – The red dashed line and arrows indicating the spreading of Spirematospermum via the North Atlantic Land Bridge in either direction during the Late Cretaceous; II – The purple dashed line and arrow indicating eastward expansion of Spirematospermum into Asia during the Oligocene; III – The blue dashed line and arrows indicating further eastward expansion of Spirematospermum into East Asia during the Miocene

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