Map point data provided by iDigBio.
- C4 (Arnheim)
- C2 (Fairview)
- Composed of cylindrical or compressed branches
- Twiglike form and moderately open small canals
- Subramose or palate form
- Irregularly distributed canal apertures
- Undetermined spiculae
Heterospongia subramosa from the Richmond Formation of Lebanon, Kentucky (CMC 7034)
Fossils of Ohio (1996):
- Ulrich, showing characteristic twiglike form and moderately open small canals.
- Sponge subramose, of cylindrical or compressed branches up to 30 mm. or more in width. Its general features are shown in the accompanying figures.
- Sub-ramose or palmate; branches more or less flattened, from 9 to 13 mm. thick and from 11 to 30 mm wide; surface generally even, with irregularly distributed canal apertures; these of varying size, the average diameter being 0.7 mm., with five in five mm.; space between apertures varying from 0.2 mm. to 1.2 mm.; sponge skeleton composed of more or less loosely interwoven fibers, though the interspaces generally appear solid and structureless; spiculae undetermined.