Cryptoborsonia rugobela
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| Cryptoborsonia rugobela | |
|---|---|
 | |
| Holotype | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Neogastropoda |
| Superfamily: | Conoidea |
| Family: | incertae sedis |
| Genus: | †Cryptoborsonia |
| Species: | †C. rugobela |
| Binomial name | |
| †Cryptoborsonia rugobela A. W. B. Powell, 1944 | |
Cryptoborsonia rugobela is an extinct species of sea snail, a marine gastropod mollusc, in the superfamily Conoidea, currently unassigned to a family.[1] Dating to the Late Oligocene, fossils of the species have been found in Jan Juc Formation of the Port Phillip Basin in Victoria, Australia.
In the original description, Powell described the species as follows:
Small, biconic, with a subsutural fold and concave shoulder. Shoulder angle at two-thirds whorl height. Protoconch damaged, but as in [holotype of C. pleurotomella]. Post-nuclear sculpture of numerous sharply raised, narrow spiral cords 5-8 from shoulder angle to lower suture, 24 on body-whorl: widely spaced on base, weaker and more closely spaced towards shoulder. There are 2-3 weak spiral lirations on the shoulder or sinus area. Axials broadly rounded, strong on spire-whorls, obsolescent on body-whorl, 17 per whorl. Sinus occupying the shoulder, rather deep, arcuate, drawn forwards at the suture and produced forwards below in a broad, arcuate sweep. Outer lip thin. Pillar with a slight median bulge. [2]
The holotype measures 8.5 mm (0.33 in) in height and 3.9 mm (0.15 in) in diameter.[2]