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Rhodomyrtophyllum pasekovicum
Rhodomyrtophyllum pasekovicum Vikulin Bot. J. Linn. Soc., 131(1): 78. Sep 1999
- Name
- Rhodomyrtophyllum pasekovicum
- Rank
- Species
- Generic Name
- [Genus] Rhodomyrtophyllum
- Authors (Pub.)
- Vikulin S. V.
- Publication
- Palaeogene leaf compressions of myrtaceous affinity fiom Pasekovo, Middle Russian Upland, southern European Russia [1999/9]
- Journal
- Botanical Journal of the Linnean Society
- Volume
- 131
- Issue
- 1
- Page number
- 78
- Year
- 1999
- Fossil Status
- leaves
- Stratigraphy
- Eocene
- Location
- Pasekovo village, Voronezh region, Russian Federation
- Paleoregion
- Eurasia (Europe)
Data for Holotypus
- Repository
- Komarov Botanical Institute, Russian Academy of Sciences, St.-Petersburg, Russian Federation
- Repository Number
- 116A/1392 + one cuticle slide (116a/ 1392s)
- Diagnosis
- ArchikcturalfeatureJ. Leaf shape: ovate or obovate. Size range: 5- I0 cm long, by 2-4, 5cm wide. Leaf base tapering and cuneate. Leaf tip: acute or attenuate, rarely obtuse. Margin entire. Venation unicostate, strong midrib and extremely delicate secondaries. General venation pattern brochidodromous, pinnate; the number of secondary veins around six. Cuticularfeatures. Leaves hypostomatic, diverse types of stomata unstable and heterogeneous as to stomatal type: anomo-, anomostaurocytic, laterocytic or intermediate with between 4 and 7 subsidiary cells, most commonly 4-5. Sunken stomata with outer double cuticular peristomal rims dispersed randomly over the whole abaxial (lower) surface, forming very closely attached dcnse stomatal groups or clusters of 4-8-1 2- 15. Giant stomata are characteristic with concentric allied ordinary stomata. Two outer stomatal rims well defined in both ordinary and giant stomata. Epidermal cell walls of both abaxial and adaxial epidermis highly undulate, anticlinal cell walls moderately buttressed. The sinuous shape of anticlinal walls classified as types ‘S’ or ‘U’. Hair base with succession of inner cuticular scars, f associated with veins and venules.
