Tsuga (ENDL.) CARRIÈRE, 1855

Martinetto, Edoardo, Bertini, Adele, Mantzouka, Dimitra, Natalicchio, Marcello, Niccolini, Gabriele & Kovar-Eder, Johanna, 2022, Remains Of A Subtropical Humid Forest In A Messinian Evaporitebearing Succession At Govone, Northwestern Italy - Preliminary Results, Fossil Imprint 78 (1), pp. 157-188 : 169

Genus Tsuga (ENDL.) CARRIÈRE, 1855

Tsuga canadensis- type and Tsuga diversifolia- type Pl. 5, Figs 28, 29

M a t e r i a l. Tsuga canadensis CARRIÈRE- type and T. diversifolia (MAXIM.) MAST. - type pollen grains are frequent.

R e m a r k s. Tsuga pollen morphology has been described repeatedly ( Ho and Sziklai 1972, Sivak 1973, 1978, Kurmann 1990, Grímsson and Zetter 2011). Two pollen morphotypes were recognized in this work: T. canadensis - type and T. diversifolia - type. Both pollen types are monosaccate and inaperturate. T. diversifolia - type is also echinate (e.g., Grímsson and Zetter 2011). Both types are very common in the selected samples, but T. diversifolia - type is more abundant than T. canadiensis - type.