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Marsilea johnhallii
Marsilea johnhallii J.E. Skog, Dilcher Amer. J. Bot., 79(9): 983. 15 Sep 1992
- Name
- Marsilea johnhallii
- Rank
- Species
- Generic Name
- [Genus] Marsilea
- Authors (Pub.)
- Skog J. E.
Dilcher D. L.
- Publication
- A new species of Marsilea from the Dakota Formation in Central Kansas [1992/9]
- Journal
- American Journal of Botany
- Volume
- 79
- Issue
- 9
- Page number
- 983
- Year
- 1992
- Parent Taxon
- [Genus] Marsilea
- Fossil Status
- rhizomata (with foliage)
- Stratigraphy
- Cenomanian
- Location
- 2 miles south of Hoisington, Great Bend NE Quad, Barton Co., Kansas, USA
- Paleoregion
- America (North)
Data for Holotypus
- Repository
- Florida Museum of Natural History, Gainesville, USA
- Repository Number
- 15706-8273
- Diagnosis
- Creeping rhizome 1-2.5 mm in diam. with roots at the nodes, petioles 1-1.5 mm wide, 1.5-4.5 cm long, with four terminal leaflets; leaflets wedge-shaped, lateral margins straight to convex, terminal margins mostly crenate but some entire. Venation dichotomous then anastomosing with a marginal vein. Fertile material not attached. Suspected sporocarps with venation typical of Marsilea 5-6 mm long, 3-4 mm wide, rounded in shape with narrow peduncle and no spines. In situ spores unknown.
Nomenclatural synonyms (basionyms)
Species
