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Alnus protomaximowiczii
Alnus protomaximowiczii Tanai J. Fac. Sci. Hokkaido Univ., Ser. 4, Geol., 11(2): 283. 20 Mar 1961
- Name
- Alnus protomaximowiczii
- Rank
- Species
- Generic Name
- [Genus] Alnus
- Authors (Pub.)
- Tanai T.
- Publication
- Neogene floral change in Japan [1961/3]
- Journal
- Journal of the Faculty of Science of the Hokkaido University
- Volume
- 11
- Issue
- 2
- Page number
- 283
- Year
- 1961
- Parent Taxon
- [Genus] Alnus
- Fossil Status
- leaves
- Stratigraphy
- Miocene
- Location
- Yoshioka, Fukushima-cho, Matsumae-gun, Hokkaido, Japan
- Paleoregion
- Eurasia (Japanese Archipelago)
Data for Holotypus
- Repository
- National Museum of Nature and Science, Palaeobotany Collection, Tokyo, Japan
- Repository Number
- UHR-15135
- Diagnosis
- Leaves medium to large in size, 5.0 to 11 cm long and 5.5 to 8.2 cm wide, broadly ovate in general outline; base truncate; apex prolongly acute; margin doubly serrulate with callous tips; midrib stout, straight or slightly arched, becoming thin in the upper portion ; seeondaries stout, slightly curved upwards, often branching near the margin, subparallel, 9 to 10 pairs, subopposite or alternate, diverging angles from the midrib 35 to 45 degrees on the middle portion, aeute to tip and obtuse to base, sornewhat inequilateral on the both side of the midrib; tertiaries thin, pereurrent ; petiole stout, thick, more than 2.3 cm long ; texture more or less thick, subcoriaceous.
