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Aclistochara complanata
Aclistochara complanata R.E. Peck Profess. Pap. U.S. Geol. Surv., 294(A): 27. Aug 1957
- Name
- Aclistochara complanata
- 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
- 408
- Diagnosis
- Fairly large ovoid gyrogonites with wide cellular furrows, rounded bases, and narrow truncate summits. Cellular furrows and intercellular ridges prominent and well differentiated in proximal part of gyrogonite; furrows become progressively more filled distally until near summit furrows and ridges approach same level, making specimen appear smooth and worn in upper part. Sides of gyrogonite taper gradually and evenly from greatest diameter at or slightly below midheight to summit truncation which is 2/5-3/5 the maximum diameter. Spirals narrow appreciably as they approach and turn onto summit, where they make a sharp bend in toward center and become depressed. Details of distal ends of spirals not observed. Spirals on sides of gyrogonites generally wide but irregular in width, 6 or 7 visible in lateral view.
