Ancistrolepis decora: Height 129 mm, Width 72 mm.

Shell of moderate size, white under an olivaceous furfuraceous periostracum, with six somewhat turrited whorls exclusive of the (lost) nucleus; the periostracum shows projecting hairs at the intersections of the reticulate sculpture; the upper whorls are a good deal eroded in the type specimen; suture distinct, narrow, deep, but not channelled; spiral sculpture of a prominent strong cord at the shoulder, another, somewhat smaller, a little way in front of the suture, and numerous small threads with equal or wider interspaces, over the general surface; axial sculpture only of rather prominent and widety spaced incremental lines forming a minute reticulation with the spirals; aperture ample, outer lip thin, body with a thin wash of enamel, pillar very short, wrinkled over a well marked siphonal fasciole; canal hardly differentiated from the aperture; operculum normal, height 58; diameter, 34 mm. U. S. Nat. Mus. Cat. No. 110775.
Dredged in the Japan Sea at station 4991, in 325 fathoms, mud, bv the United States Bureau of Fisheries steamer Albatross.

Ancistrolepis decora: Egorov, 1994
Shell large, solid, various in form from broadly-fusiform to almost egglike, consists of 8 whorls. The profile of whorls from moderately to very convex almost bulbous, sometimes concave between the sutura and shoulder keel. The spire from low to raised. Spiral sculpture is very various and consists of riblets, which are irregular in width and prominence, often almost absent and secondary ribs. The secondary ribs are more distinctive on the base and siphon. There are 40-70 secondary ribs on the body whorl. Also, there are keels (1-20 on the body whorl), which are present on the almost all shell surface. Axial sculpture consists of rough growth lines. Aperture is wide, sometimes almost rounded, occupies about 5/10 of the shell height, white, yellow, light-orange. Inner lip is covered with grayish or yellowish callus. Siphon is short, wide, curved to the left. Shell is covered with thick, dense greenish-olive periostracum, which forms numerous rather high axial lamellae with long bristles. Color of shell under periostracum is grayish, with sometimes brownish keels.

Alexeyev, 2003
Shell is rather large, up to 13 cm in height, rather solid. There is narrow flattened ground in upper part of whorls. Axial sculpture is presented by growth lines only. Spiral sculpture is presented by ribs different in size. Spiral ribs are usually arranged in groups and form secondary ribs. There are usually 4-5 secondary spiral ribs on 5 mm of periphery of body whorl. Sometimes primary ribs are poorly developed and only secondary ribs are visible. Besides spiral ribs sometimes spiral keels present — usually 1-3 keels on body whorl. Shell is from white to pale outside, sometimes keels are brownish. Periostracum is thick, velvety, olive, with numer-ous low axial crests bearing numerous and rather long bristles. Aperture and inner lip are white or yellowish, sometimes with yellow spots. Outer lip is usually rather solid. Occurs in northern part of the Sea of Japan and in the Ókhotsk Sea. Subspecies Clinopegma decora checknwm Tiba, Kosuge, 1982 is characterized by more rounded whorls.

Ancistrolepis decora: Very variable species. Some specimens of this species resemble A. (C.) uritae, but differ from later in long bristles on the periostracum, less expressed riblets and present secondary ribs. [Egorov, 1994]

Ancistrolepis decora: Widely spread species, from Primorski Territory, in the Japan Sea, Tatar Strait, East Sakhalin to the northern and north-western parts of the Okhotsk Sea, at depth from 30 to 310 m. Common.