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Species / Strombus Subgracilior

Strombus Subgracilior

Stromboidea


Original Description of Strombus subgracilior by Durham, 1950, p. 118:

  • "Shell moderately large, stromboid, resembling S. gracilior Sowerby; spiral conical, not "stepped"; immature whorls of spire with about 11 small nodes; last 2 whorls smooth; suture appressed and immediately below shoulder of preceding whorl, so that side profile of spire is only slightly wavy; body whorl inflated, outer lip flaring; posterior siphonal notch large; no apparent ornamentation."

Strombus subgracilior Durham, 1950, pl. 27, fig. 7

Durham, 1950, p. 118:

  • Dimensions of holotype: height 73.5 mm., greatest diameter (including outer lip) 56.4 mm.
  • Holotype no. 30468 (loc. A 3533).
  • OCCURRENCE: loc. A 3533, ? A 3562.
  • RANGE: middle and upper Pliocene.
  • REMARKS: This species may be distinguished from S. gracilior Sowerby (Pl. 27, fig. 5) by the straight-sided spire, the higher suture, and the lack of nodes on the body whorl.

References

  • Durham, J. W. (1950) The 1940 E. W. SCRIPPS cruise to the Gulf of California: Part 2, Megascopic paleontology and marine stratigraphy, Geol. Soc. Am., Mem., p. 1144, Fulltext

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