1889 Heterospongia subramosa Ulrich, Amer. Geol., 3, p. 236, 240, fig. 6.
1891 Heterospongia subramosa James, Jour. Cincinnati Soc. Nat. Hist., 14, pt. 1, p. 71.
1895 Heterospongia subramosa Winchell and Schuchert, Geol. Minnesota, 3, pt. 1, p. 79, pl. G, figs. 4-6.
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Map point data provided by iDigBio.
- C4 (Arnheim)
- C2 (Fairview)
Identification in Hand Sample
- 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.