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Woodwardia gravida
Woodwardia gravida L.J. Hickey Mem. Geol. Soc. Amer., 150: 109. 19 Jul 1977
- Name
- Woodwardia gravida
- Rank
- Species
- Generic Name
- [Genus] Woodwardia
- Authors (Pub.)
- Hickey L. J.
- Publication
- Stratigraphy and paleobotany of the Golden Valley Formation (Early Tertiary) of Western North Dakota [1977/7]
- Journal
- Memoirs of the Geological Society of America
- Volume
- 150
- Page number
- 109
- Year
- 1977
- Fossil Status
- foliage (fertile)
- Stratigraphy
- Thanetian
- Location
- north of Lost Bridge, Dunn County, North Dakota, USA
- Paleoregion
- America (North)
Data for Holotypus
- Repository
- National Museum of Natural History, Smithsonian Institution, Washington, USA
- Repository Number
- USNM 43427; the following spores from the holotype: USNM 43429 (x, y coordinates, -27.8, 13.5), 43430 (-28. 7, 7.4), 43431 (-27.2, 7.8), and 43432 (-41.6, 8.2); PU 20093 (-12.1, 12.0) and 20094 (-30.2, 9.2).
Data for Paratypus
- Repository
- National Museum of Natural History, Smithsonian Institution, Washington, USA
- Repository Number
- USNM 43428
- Diagnosis
- Fertile pinna with pinnatifid pinnules; pinnules oblong with acute apices,
margins mostly eroded but sharply serrulate where preserved; pinnule / about 10 mm; w 3 mm; w of rachis 2.5 mm; sporangia forming a dense and continuous mass, without partitioning veins or false indusia, occupying the area on either side of the pinnule midribs and the rachis; sporangia 0.22 to 0.28 mm in diameter with a prominent annulus consisting of 18 to 24 cells; venation of fertile pinna not preserved. Spores monolete, oval in proximal view to bean shaped in lateral-longitudinal view; / 35 to 46 um; w 18 to 32 (j.m; no evidence of the perispore remaining; spore wall smooth with several isolated knobs, wall less than 1 um thick. Occurring in the same formation and provisionally included within the species is a sterile pinna with oblong, acute-tipped, pinnatifid pinnules having serrulate margins. Pinnule / 1.6
to 1.8 cm; w 6 mm; venation pinnate, dichotomously branched, anastamosing twice to the margin, forming axially elongate areoles next to the midveins of the pinnules, marginal parts of the veins running to, but not into, the teeth.
