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Cryptostomiforma quinata
Cryptostomiforma quinata G.R. Guerin, R.S. Hill Austral. J. Bot., 64(8): 721. Nov 2006
- Name
- Cryptostomiforma quinata
- Rank
- Species
- Generic Name
- [Genus] Cryptostomiforma
- Authors (Pub.)
- Guerin G. R.
Hill R. S.
- Publication
- Plant macrofossil evidence for the environment associated with the Riversleigh fauna [2006/11]
- Journal
- Australian Journal of Botany
- Volume
- 64
- Issue
- 8
- Page number
- 721
- Year
- 2006
- Fossil Status
- leafy twigs
- Stratigraphy
- Chattian
- Strat. comment
- 24–26 mya
- Location
- The Dunsinane Site of Riversleigh, Queensland, Australia
- Paleoregion
- Australia
Data for Holotypus
- Repository
- Queensland Museum, Brisbane, Australia
- Repository Number
- QMF48109
- Diagnosis
- Branchlet articles circular in cross-section. Articles glabrous, length 8 to greater than 13 mm, width 0.4–0.7 mm. Leaves (teeth) in whorls of five. Teeth glabrous, with acute apices and sinuses, the teeth overlapping at the base, length 0.6–1.1 mm, width 0.2–0.5 mm. Stomatal furrows deep and
narrow, distributed radially around the articles. Stomatal furrows closed on the surface to wide open, depending on degree of maturity. Furrows containing two bands of stomata, each with a single row of closely spaced stomata, occasionally with a much sparser second row which appears to comprise stomata skewed out of position. Zero, one or two epidermal
cells between stomatal complexes. Bands of stomata 33–300 μm apart. Stomatal complexes with pronounced external florin rings, incomplete at one end and sometimes at both ends. Florin-ring length 13.2–30.7 μm, width
15.0–24.0 μm. Trichome bases generally present within furrows between the two bands of stomata, often sparse but occasionally dense and numerous. Trichomes visible emerging from stomatal furrow in specimens where the
article is young. Epidermal cells ranging from rounded or irregular to becoming more rectangular and elongate on the ridges and interiors of stomatal furrows, length 8.6–29.0 μm, width 6.1–15.5 μm. Some minute papillate structuring visible on the epidermal cells immediately adjacent to the stomatal row in a single specimen. Reproductive structures unknown.
