Stromboidea
Original Description of Rimella rokeyae by Banerjee & Halder, 2024, p. 32:
- "Size medium, slender fusiform. Protoconch smooth, comprising 3 slightly convex whorls, appearance of fine, closely spaced axial ribs marks its transition to spire. In adult specimens the posterior canal and the labial callus completely cover the protoconch and early whorls. Spire long with 8 whorls separated by impressed sutures. Whorl overlap 60%. Whorl sides convex; sharp, straight or slightly concave forward axial ribs and varices appear in spire whorls; ribs thin, numerous and closely spaced up to third or fourth whorl; strength, concavity of the ribs and their spacing increase in later ontogeny; c. 13 ribs and 2 varices in each mature whorl, varices appear at irregular intervals. Last whorl convex; ornamented with concave forward axial ribs, abapertural side of last whorl just before dorsal varix smooth, axial ribs disappear at base; faint spiral lines on the abapical side of the axials, becoming stronger at base, at least 3 weak and 4 strong spiral ridges separated by narrow grooves at base. Base rounded. Aperture narrow, elliptical, poorly preserved. Posterior canal open and grooved, extends along the spire, crosses the apex, and terminates just after it. Outer lip extends along the spire as margin of posterior canal, terminates either on the apex or just after crossing the apex, finely plicated outside. Inner lip also continues along the spire by the side of the posterior canal with a thick callus, which covers all the spire whorls on the dorsal side of the shell, this calloused lip crosses the apex like a hook and descends as far as fourth or fifth spire whorl. Columellar lip calloused and bears fine plications. Growth lines slightly concave forward on whorl sides and bend back at base."
Locus typicus: Mangrol lignite mine, Surat, Gujarat, western India.
Stratum typicum: MB3 of Cambay Shale, Ypresian, Eocene
Rimella rokeyae Banerjee & Halder, 2024; Ypresian, Eocene; Mangrol lignite mine, Surat, Gujarat, western India; 25 x 8.5 mm
References
- Banerjee, S. and Halder, K. (2024). A new caenogastropod assemblage from the early Eocene of the Cambay Basin, western India, and its palaeoenvironmental implications. Papers in Palaeontology, Vol. 10, Part 5, 2024
