Back
Tectochara grambastorum
Tectochara grambastorum R.E. Peck Profess. Pap. U.S. Geol. Surv., 294(A): 35. Aug 1957
- Name
- Tectochara grambastorum
- Rank
- Species
- Generic Name
- [Genus] Tectochara
- 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
- 35
- Year
- 1957
- Parent Taxon
- [Genus] Latochara
- 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
- 363
- Diagnosis
- Small spheroidal gyrogonites, ranging from 320/x, to 400,u. in length and 280/* to 350/* in width. Spiral ridges cellular, broadly convex, separated by narrow intercellular furrows, 9 or 10 in lateral view. The 5 spirals originate as broad convex cellular ridges around a comparatively large basal opening and ascend in little less than 2 complete turns to summit area. At edge of summit they narrow rapidly to about half their normal width and then turn abruptly in toward center, expanding rapidly and then tapering to a point. Rosette created by expansions of spirals on summit resembles 5 small almost equilateral triangles that meet in exact center of gyrogonite to completely close and roof over summit. No summit opening. Rosette persists, present on most specimens, but constriction of spirals at edge of summit establishes a zone of weakness along which spirals are broken on a few specimens. If rosette is absent, summit is open, but narrowing of spirals provides ready identification.
