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Species / Amekichilus Suturocostatum

Amekichilus Suturocostatum

Stromboidea


Original Description of Semiterebellum suturocostatum by Newton, 1922:

  • "Shell narrowly conical, depresso-convex; body-whorl compresso-convex, unidigitate, longer than the spire; spire narrow, produced, consisting of 6 or 7 whorls, of which 2.5 constitute the smooth protoconch, whorls nearly on the same plane; suture margined with a row of nearly contiguous, short, thick, slightly oblique costae, divided in the centre by an impressed line; aperture narrowly elliptical, notched at base, terminations canaliculated, anterior canal short, posterior canal long, narrow and curved backwards on to the suture; labrum nearly vertical, unidigitate, thickly margined externally; columella evenly excavated, thickly callused posteriorly, the callosity curving backwards to form the upper border of the posterior canal, then continuing as a smooth band at the base of the whorls; sculpture consisting of minute, smooth, spiral band divided by thin, microscopically punctuated furrows, as well as obscure longitudinal growth striations."

Locus typicus: Ameki, Omobialla District, Nigeria.

Stratum typicum: Lutetian, Eocene

Lectotype: R.B. Newton, 1922 pl. 4 fig. 14, designated by F.E. Eames, 1957, 39. no. G.41757 (British Museum of Natural History)

Amekichilus suturocostatum (Newton, 1922); Lectotype; Lutetian, Eocene; Ameki, Omobialla District, Nigeria; Coll. BM(NH) no. G.41757; Copyright BM(NH)

Amekichilus suturocostatum (Newton, 1922); Syntypes; Lutetian, Eocene; Ameki, Omobialla District, Nigeria; Coll. BM(NH) no. G.41758-60; Copyright BM(NH)

Amekichilus suturocostatum (Newton, 1922); Lutetian, Eocene; Ameki, Omobialla District, Nigeria; Coll. BM(NH) no. G.41746-56; Copyright BM(NH)


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