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Trochiliscus raricostatus
Trochiliscus raricostatus R.E. Peck J. Paleontol., 8(2): 114. Jun 1934
- Name
- Trochiliscus raricostatus
- Rank
- Species
- Generic Name
- [Genus] Trochiliscus
- Authors (Pub.)
- Peck R. E.
- Publication
- The North American Trochiliscids, Paleozoic Charophyta [1934/6]
- Journal
- Journal of Paleontology
- Volume
- 8
- Issue
- 2
- Page number
- 114
- Year
- 1934
- Parent Taxon
- [Genus] Trochiliscus
- Fossil Status
- gyrogonites
- Stratigraphy
- Frasnian
- Location
- Bird's Hill, southwest of Rockford, Iowa, USA
- Paleoregion
- Laurussia (Laurentia)
Data for Syntypus
- Repository
- University of Iowa, Iowa, USA
- Repository Number
- 693
- Diagnosis
- Oogonium coronulate, elongate spherical, of medium size, about 0.8 mm in height, width less than height, greatest transverse diameter at or just below mid-height. Base gently rounded, summit truncate. Ridges intercellular, seven, completing about a fourth turn around the oogonium, equatorial angle about 40°. The ridges are comparatively narrow, of uniform width from base to summit, each with a shallow median groove. Cellular furrows deep. Coronula cells seven, deeply concave on outer surface, corresponding in position with the cellular furrows and forming an erect parapetlike ring around the summit orifice, the inner surface of the coronula ring constituting a narrow funnel to the opening. Oospore membrane unknown.
