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Species / Margistrombus

Margistrombus

Stromboidea


Original designation of the genus Margistrombus by Bandel, 2007, p. 153:

  • "The type species is Strombus marginatus LINNAEUS, 1758, with pointed spire (45°) and ornament of axial ribs. The outer lip has a narrower posterior end that is attached to the spire. Callus of the inner lip is narrow and smooth. Shell size ranges from 40–50 mm (ABBOTT, 1960: pl. 18, figs. 6–11). Included is Strombus succinctus LINNE, 1758 with similar shape but less allometric growth and posterior canal long and expanded to the left, and the Strombus dilatatus SWAINSON, 1821 with smoother body whorl, a little wider outer lip that is attached to the spire in inclined position forming a canal pointed to the left."
  • "Strombus marginatus has its shell with pointed spire and evenly ovoid body whorl. There are about 8 whorls of the spire and these increase regularly in size to about the sixth and beyond that they widen more rapidly. The spire thus appears concave. The outer lip is moderately expanded and smoothly rounded. Its posterior margin is attached above the body whorl and forms a canal with the callus of the inner lip. The protoconch consists of about four smooth whorls and the transition to the teleoconch is indistinct with spiral ribs of the first whorl imprinted onto the last part of the larval whorl from the inside (Pl. 1/10–11). Occurrence in the Indo-Pacific. Strombus succinctus has similar shell shape but is less allometric in growth and its posterior canal is longer. The eight whorls of the spire increase in size more regularly and the sides of the shell have only a weak concavity. Strombus dilatatus from Australia resembles Strombus (Dolomena) variabilis, has a relatively narrow spire with corner and ornament of axial ribs and larger smooth body whorl. But it differs by having the posterior end of the outer lip attached to the spire further to the left and higher up on the last whorl."

Etymology: "The subgenus Margistrombus is a free combination of Strombus and marginatus."

Type Species by OD Strombus marginatus Linnaeus, 1758

Margistrombus species are:

from left to right: Margistrombus boucheti Thach, 2016, M. marginatus (Linnaeus, 1758), M. robustus (Sowerby2nd, 1874), M. septimus (Duclos, 1844), M. simanoki Liverani, 2013 & M. succinctus (Linnaeus, 1767)


History and synonymy

Genus Margistrombus Bandel, 2007:153

  • Syn.: Neodilatilabrum Dekkers, 2007: 58

References

  • Bandel, 2007
  • C.K. Chim, M.L. Neo & K.S. Loh, 2009. THE STATUS IN SINGAPORE OF STROMBUS (DOLOMENA) MARGINATUS SOWERBYORUM VISSER & MAN IN’T VELD, 2005 (MOLLUSCA: GASTROPODA: STROMBIDAE), NATURE IN SINGAPORE 2009 (2): 379–384
  • Visser G. & Man In't Veld L. (2005). "Contributions to the knowledge of Strombacea. 7: Notes on the Strombus (Dolomena) marginatus-complex (Gastropoda: Strombidae and the status of Strombus (Dolomena) robustus Sowerby, 1874; with description of a new subspecies, and a neotype designation of Strombus (Dolomena) marginatus Linnaeus, 1758". Gloria Maris 44(3-4): 55-68.

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