Range: Djibouti; probably Eritrea, Kenya and Madagascar.
Description: Moderately small to medium-sized, moderately solid. Last whorl ventricosely conical to conical; outline convex at adapical third, less so to straight below. Aperture somewhat wider at base than near shoulder. Shoulder subangulate to angulate. Spire of low to moderate height, outline concave. Larval shell of 1.75-2.25 whorls, maximum diameter about 0.8 mm. Teleoconch sutural ramps flat to slightly concave adaxially, with 0-1 increasing to 4-6 spiral grooves and additional spiral striae. Last whorl with variably wide spiral grooves basally, separating spiral ribs at base and ribbons above.
Ground colour white. Last whorl with variably arranged, well-separated spiral rows of rarely confluent brown dots and spots. Larval whorls white to beige. Postnuclear sutural ramps with sparse brown radial markings. Aperture white, sometimes pale yellow.
Periostracum greyish brown, thin translucent, and smooth.
Habitat and Habits: To 30 m, on sand.
Discussion: C. angioiorum resembles C. jickelii from Djibouti. Shells of the latter attain somewhat larger size than sympatric C. angioiorum, have a pattern of larger, more confluent and darker brown markings, a yellow or brownish violet collabral band within the aperture, and a brown apex; their last whorls are less ventricose and more straight-sided. For comparison with C. erythraeensis, see the Discussion of that species.
C. angioiorum range map
This section contains verbatim reproductions of the accounts of 316 species of Conus from the Indo-Pacific region, from Manual of the Living Conidae, by Röckel, Korn and Kohn (1995). They are reproduced with the kind permission of the present publisher, Conchbooks.
All plates and figures referred to in the text are also in Röckel, Korn & Kohn, 1995. Manual of the Living Conidae Vol. 1: Indo-Pacific Region.
The range maps have been modified so that each species account has it own map, rather than one map that showed the ranges of several species in the original work. This was necessary because each species account is on a separate page on the website and not confined to the order of accounts in the book.