Includes Constellaria constellatai
History: (Nickles & Bassler, 1900)
- 1875 Constellaria polystomella Nicholson, Pal. Ohio, II, p. 215, pl. xxii, 7, 7a.
- 1882 Constellaria polystomella Whitfield, Geol. Surv. Wisconsin, IV, p. 257, pl. xii, 3,4.
- 1896 Monticulipora (Constellaria) polystomella (in part) J.F. James, Jour. Cincinnati Soc. Nat. Hist., XVIII, p. 118.
- Cincinnati (Richmond): Delafield, Wisconsin; Wilmington, Illinois; Richmond & Versailles, Indiana; Blanchester, Waynesville, and other localities in Ohio.
- Observation:Nicholson erronesously records this characteristic fossil of the Richmond beds as from Cincinnati, Ohio.
Map point data provided by iDigBio.
- C6 Sequence (Upper Whitewater, Elkhorn)
- C5 Sequence (Saluda, Lower Whitewater, Liberty, Waynesville)
- C4 Sequence (Arnheim)
- Zoarium Morphology: Erect, flattened branches or fronds (frondose)
- Zoecia: polygonal
- Mesozooids: More numerous in maculae
- Monticules: Surface with depressed stellate (star-shaped) maculae
- Spaces between rays elevated and occupied by rows of close apertures
Diagnosis: Differs from C. florida in having more numerous ridges in the “stars” and a clearer distinction between the stars (Davis, 1998)
- Differs from Constellaria florida in having more numerous ridges in the “stars” and a clearer distinction between ‘stars’
- (Genus description) Dendroid or frondescent zooaria with depressed stellate maculae.C. polystomella has more frondescent, stars occupy definite polygonal areas, each star circumscribed by a “hexagonal border”
- Specimens forming somewhat flattened branching fronds, many 20 mm. or more wide, and 3 or 4 mm thick. Stellate maculae mostly on boldly elevated prominences, many half a millimetre high, and 2 to 3 mm. across.
- Locality and Horizon. A characteristic fossil of the Richmond, from the Waynesville upward in Ohio, Indiana, Kentucky, Illinois, and Wisconisn. Clay cliffs (No. 8550) and Streetsville.