3A): Dorsal margins narrow, linear, clearly delimited, canaliculate
, and both sharply delimited by longitudinal sulci from sternal parts of their ventrites.
3 cm wide at base, suberect-recurved to subspreading, coriaceous, canaliculate
, densely and coarsely adpressed white-lepidote near the base and glabrous toward the apex on both sides, but adaxially sometimes completely glabrous, abaxially nerved, greenish-red to dark red, margins laxly spinose, spines subtriangular, complanate, distinctly antrorse-uncinate, 1.
78) dextral, up to 30 mm, thick, elongate and acute-conical, 7-14 whorls, apical whorls bearing 1-3 carinae; body whorl shouldered at outer periphery, striate below; aperture angulate, lacrimate, canaliculate
(Harmen & Berg 1971); growth lines inconspicuous; subfossils usually fragmented, lack periostracum.
4 cm in diameter (including floral bracts); floral bracts narrowly subtriangularovate, apex acuminate, distinctly canaliculate
, navicular, strongly recurved, slightly exceeding the petals, greenish-yellow toward base and yellow-green near the apex and margins, thin in texture, abaxially densely to subdensely white-lepidote, nerved, adaxially inconspicuously and sparsely white-lepidote to glabrous, 25-29 x 10-13 mm, the basal ones ecarinate, the upper ones obtusely if at all carinate, margins subdensely to laxly spinose, spines narrowly triangular to acicular, prevailing retrorse, uncinate, pale yellowish-castaneous, 0.
5 cm, subdensely and inconspicuously brown-lepidote; blades sublinear-lanceolate, distinctly narrowed toward the base, canaliculate
and bearing a slightly thicker median channel toward the base, 17- 32 x 2.