Back
Leptocycas gracilis
Leptocycas gracilis Delev., R.C. Hope Postilla, (150): 3. 22 Jan 1971
- Name
- Leptocycas gracilis
- Rank
- Species
- Generic Name
- [Genus] Leptocycas
- Authors (Pub.)
- Delevoryas T.
Hope R. C.
- Publication
- A new Triassic cycad and its phyletic implications [1971/1]
- Journal
- Postilla
- Issue
- 150
- Page number
- 3
- Year
- 1971
- Fossil Status
- stems
- Stratigraphy
- Carnian
- Strat. comment
- Pekin Formation
- Location
- a shale quarry of the Boren Clay Products Co. off highway U.S. 421 at Gulf, Chatham County, North Carolina, USA
- Paleoregion
- America (North)
Data for Holotypus
- Repository
- Yale Peabody Museum of Natural History, New Haven, USA
- Repository Number
- YPM Paleobotany 114
- Diagnosis
- Stems slender, 3 to 5 cm wide, bearing terminal crown of loosely arranged, pinnately compound leaves of the Pseudoctenis type, with persistent bases of petioles a little farther down, and devoid of foliar structures at lower levels. Cataphylls intermixed with leaves, cones borne terminally. Cuticle of pinnae, rachises and stems with straight epidermal cell walls and haplocheilic stomata tending to be oriented parallel with veins; dorsal wall of guard cell thickened into a flangelike structure; pole of guard cell extending beyond the dorsal thickening. Pinnae decurrent, with parallel venation, attached to rachis laterally and broadly, but the base of pinna tilted with respect to rachis axis; distal edge of pinna closer to the ventral surface of the leaf than proximal edge.
