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Azolla atava
Azolla atava V.P. Nikitin in V.P. Nikitin, Hval' Paleobot., 2: 48. 2011
- Name
- Azolla atava
- Rank
- Species
- Generic Name
- [Genus] Azolla
- Authors (Name)
- Nikitin V. P.
- Authors (Pub.)
- Nikitin V. P.
Hval' A. V.
- Publication
- Reproduktivnye struktury Azolla v kajnozoe Zapadnoj Sibiri [2011]
- Journal
- Paleobotanika
- Volume
- 2
- Page number
- 48
- Year
- 2011
- Fossil Status
- sporae dispersae (megaspores)
- Stratigraphy
- Eocene
- Strat. comment
- Tavdinian suite
- Location
- Baturino village, right bank of Chulym river, Tomsk region, Russian Federation
- Paleoregion
- Eurasia (W Siberia)
Data for Holotypus
- Repository
- Komarov Botanical Institute, Russian Academy of Sciences, St.-Petersburg, Russian Federation
- Repository Number
- 206/Н4782
- Diagnosis
- Megaspore complexes small, 0,35—0,37 mm long, with a median constriction. Supraspore approximately as high as the infraspore or shorter. Basic fl oats 9. Lower fl oats of comparable size to the upper ones. Cap partially to completely covering the supraspore. Columella present. Collar narrow to almost indistinct, less often wide. Suprafi losum moderately developed to scarce. Infraspore surface spongy, even or with faint wide rounded tubercles and occasionally with conic outgrowths formed by merging and vertical enlargement of adjacent elements of the fi ne sculpture. Infrafi losum absent or weakly developed. Massulae distinctly compressed, very small, 0,02 mm in diameter, with medium-sized, 0,07—0,09 mm, nonseptate glochidia. Massula comprising 3-4 microspores.
