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Praechara symmetrica
Praechara symmetrica R.E. Peck Profess. Pap. U.S. Geol. Surv., 294(A): 39. Aug 1957
- Name
- Praechara symmetrica
- Rank
- Species
- Generic Name
- [Genus] Praechara
- Authors (Pub.)
- Peck R. E.
- Publication
- North American Mesozoic Charophyta [1957/8]
- Journal
- Professional Papers / United States Geological Survey
- Volume
- 294
- Issue
- A
- Page number
- 39
- Year
- 1957
- Parent Taxon
- [Genus] Praechara
- Fossil Status
- gyrogonites
- Stratigraphy
- Aptian
- Location
- North side of Fall River road 3.2 miles southeast of Hot Springs, S. Dakota, USA
- Paleoregion
- America (North)
Data for Holotypus
- Repository
- U.S. Geological Survey, Denver, USA
- Repository Number
- 374
- Diagnosis
- Small spheroidal gyrogonites with pointed bases and broadly rounded to slightly pointed summits. Range in length from 450ju, to 550/u, and in width from 375/* to 450ju,. Cellular furrows broad, about 75ji*, shallow, and separated laterally by low narrow intercellular ridges. Eight or nine spiral ridges in lateral view. Spirals ascend onto summit, broaden slightly on summit area, and end near a point in center without leaving a summit opening. Basal opening small and pentagonal. Walls of gyrogonite very thin; many specimens crushed.
Nomenclatural synonyms (basionyms)
Species
