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Species / Apporrhais Pachysoma

Stromboidea


might be a Tundora

Original Description of Apporrhais [sic] pachysoma Gardner, 1875, p. 295:

  • "A small ovate shell, composed of three or four inflated whorls and an expanded wing. The body-whorl is very large in proportion to the whole shell, is rounded, and without carinae. The spire is depressed, and the whorls inflated and keel-less. The body whorl has about fifteen striae, which seem to be finely tuberculated. The columellar lip appears to have been very much incrusted. The aperture is crescentic, and the lip is developed into two short canaliculated spines, and is terminated anteriorly and posteriorly by rather short and slightly recurved canals, the posterior one being attached only to the body-whorl.

Comment Gardner: In the young state the shell would resemble a globose form of Acteon. It differs from all other Aporrhaidae."

Locality. - Grey Chalk of Lyddenspout, where it is rare.

Locus typicus: Lyddenspout [Lydden Spout], England

Stratum typicum: "Grey Chalk of Lyddenspout", Cenomanian

Aporrhais pachysoma Gardner, 1875, pl. 2, fig. 8

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