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Species / Calyptraphorus Jacksoni

Calyptraphorus Jacksoni

Stromboidea


Original Description of Calyptrophorus [sic] jacksoni by Clark, 1896, p. 68:

  • "Shell large, solid, many whorled; spire prolonged, acuminate; surface of adult covered with thick, calcareous deposit, entirely enveloping the whorls; inner lip thickened with extensive callosity."

Comment Clark, 1896, p. 68:

  • "This very remarkable form is quite distinct from any other species, none of the Gulf types approaching it in size or amount of callosity. Some of the largest specimens of C. trinodifera Conrad show certain points of similarity, but the Maryland species can not be confounded with it. In the absence of young shells, the character of the surface decoration is unknown. A large number of specimens have been found in the South River area."

Locus typicus: "South of Annapolis, near South River, upper Marlboro Md.", Maryland, USA

Stratum typicum: Aquia Formation, Thanetian?, Paleocene

Dimensions: "Length, 75 mm.; width, 30 mm."

Calyptrophorus [sic] jacksoni Clark, 1895, p. 4


History and Synonymy

1896

Calyptrophorus [sic] jacksoni Clark, 1896, pl. 12, figs. 2a, 2b

1901

Calyptraphorus jacksoni Clark & Martin, 1901, p. 145, pl. 25, figs. 1, 1a copy Clark, 1896, fig. 2

Description of Calyptraphorus jacksoni of Clark, 1896 cited by Clark & Martin, 1901:

  • "Shell large, solid, many whorled; spire prolonged, acuminate; surface of adult covered with thick, calcareous deposit, entirely enveloping the whorls; inner lip thickened with extensive callosity."

1937

Calyptraphorus jacksoni Palmer, 1937, p. 243

1944

Calyptraphorus jacksoni in Shimer & Shrock, 1944, p. 500, pl. 204, figs. 5, 6 copies Clark & Martin, 1901


References


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