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Aclistochara latisulcata
Aclistochara latisulcata R.E. Peck Profess. Pap. U.S. Geol. Surv., 294(A): 27. Aug 1957
- Name
- Aclistochara latisulcata
- Rank
- Species
- Generic Name
- [Genus] Aclistochara
- 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
- 27
- Year
- 1957
- Parent Taxon
- [Genus] Aclistochara
- Fossil Status
- gyrogonites
- Stratigraphy
- Kimmeridgian
- Location
- East bluff of Platte Eiver in T. 31 N., K. 2 W., south of Douglas, Converse County, Wyoming, USA
- Paleoregion
- America (North)
Data for Holotypus
- Repository
- U.S. Geological Survey, Denver, USA
- Repository Number
- 412
- Diagnosis
- Large spheroidal gyrogonites with wide cellular furrows, gently rounded bases, and broadly truncate summits. Central third of summit depressed; depression occupied by thin distal ends of spirals. Basal opening pentagonal and about one-tenth total diameter of specimen. Spiral ridges intercellular in position, sharp to slightly flattened. Sutures readily seen and marked by small furrows on crests of ridges. Spirals ascend in about iy2 turns around gyrogonite, turn down slightly just inside rim of summit, and then turn abruptly inward to close summit opening with thin transparent distal ends of spirals. On summit deepest part of cellular furrow on extreme right just to left of spiral ridge, furrow sloping uniformly from top of ridge to deep part of furrow to give appearance of imbrication of spirals. No change in shape or thickness of spirals except in extension to close summit opening. Six or seven spiral ridges visible in lateral view. Spiral walls relatively thick, of uniform width throughout.
