Amaea optima
(Melvill & Standen, 1903)
Description:
Dimensions range from 13 mm - 13 mm high and 3 mm wide.
Width to height ratio: 0.23:1 ~ 0.23:1
Shell: attenuate-fusiform; small. Exterior colour whitish. About 10 whorls; protoconch unknown. Suture impressed. Costae are oblique, thin, sharp, fragile and very dense. Intercostal spaces spirally ridged, with square-shaped interstices. Aperture small and round, white inside; outer lip thin outer lip and the columellar margin reflexed near the umbilical region.
Distribution:
Persian Gulf
Habitat:
15-18 m
Etymology:
Shell attenuate-fusiform, whitish, with ten whorls (in the single imperfect specimen), the apical whorls uncertain. The remaining whorls are impressed at the sutures and are finely and beautifully decussate throughout. The longitudinal lamellae are oblique, thin, sharp, and very dense, occasionally varicose. The shell is also spirally ridged, with square-shaped interstices. Aperture small and round, white inside, with a thin outer lip and the columellar margin reflexed near the umbilical region.
Type Material:
Holotype: NHMUK 1903.12.15.27-8 for Amaea optima (Melvill & Standen, 1903) - Locality: Maskat, Gulf of Oman, 8-10 fms [= 15-18 m].. [Brown, L. & Neville, B.D., 2015]
Melvill, J. C. & Standen, R (1903). Plate VII. Fig. 16.
Scala (Cirsotrema) optima sp.n. (PI. VII., fig. 16).
Distribution
as listed in source literature
Melvill, J. C. & Standen, R (1903).
Plate VII. Fig. 16.
Scala (Cirsotrema) optima sp.n. (PI. VII., fig. 16).
pp: 350.
Original description
Kaicher, S.D. (1980).
