Phos vaughani
- Phylum: Mollusca
- Class: Gastropoda
- Order: Neogastropoda
- Family: Nassariidae
- Genus: Phos
- Species: Phos vaughani (Mansfield, 1930)
Geological Range
Late Pliocene; Extinct.
Paleogeographic Distribution
Northern Florida.
Remarks
Original Description (from Mansfield, 1930, p. 75):
"Shell slender, solid, high-spired, rather strongly axially and spirally sculptured, consisting of 9 whorls. Whorls moderately inflated and evenly and gradually enlarging anteriorly. Suture close-fitting and weakly undulating. Nucleus conical, small, with 2.5 smooth whorls; apical turn minute, terminally shallowly immersed; succeeding nepionic half-turn sculptured with 8 arcuate, sharp riblets. Axial sculpture on following whorls of about 12 arched, moderately strong ribs, persisting across the spire whorls and to the fasciole on the body whorl and separated by valleys about equal in width to axials. Axials on the anterior part of last whorl more closely-set and finer. Spiral sculpture of (3 on spire whorls and 9 on last whorl and canal) narrow equally spaced bands, occupying the area from the upper shoulder to the forward suture on the spire whorls and to the siphonal fasciole on the last whorl and overriding the axials and valleys with equal strength. Two smaller spirals lie on the shoulder slope behind the suture and a median spiral thread intercalates all the primary bands except those on the base of the body whorl. Outer lip arched, thin, weakly marginally crenulated and internally marked below the margin with 1 sharp equally spaced lirations. Columellar lip callus, weakly sculptured with irregular oblique elevations. Canal short, reflexed, and deeply emarginate. Siphonal fasciole strongly developed, marked with poorly defined spirals and incrementals.
The description is based on two specimens. The smaller specimen has a well-preserved nucleus.
Dimensions: Larger cotype (U.S.N.M. Cat. No. 370143) measures: Altitude, 13.5 mm.; diameter, 5 mm.
Phos parvus var. intricatus Dall, a variety, according to Dall, occurring in the Pliocene and Recent faunas, is related to the new species, but the latter has a different type of nucleus and a less crowded sculpture ornamentation.
Occurrence: Upper Miocene: Florida, station 3671, Hosford, Liberty County (common), station 3672, 1 mile northwest of Hosford."
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Stratigraphic Occurrences
- Late Pliocene
- Jackson Bluff Formation (N. FL)
