Typhlosyrinx subrosea: Thin-shelled. Protoconch 3½-4 whorls, with (except 1st) oblique (protractive) pliculae, crossed below the periphery by retractive pliculae, producing micro-clathrate sculpture. Postnatal whorls profile evenly convex, the sulcus not concave, scarcely distinguishable from rest of profile. No axial sculpture except the growth-lines, which are sigmoid but not very concave across the sulcus. Impressed spiral striae scarcely indicated on 1st and 2nd whorls, but becoming distinct near end of 2nd whorl, c. 16 on 2nd-3rd, c. 20 on 3rd-4th, c. 24 on 4th whorl, with 2-4 additional finer ones on the sulcus above the 'shoulder'. On base at least 36 striae, extending to end of rostrum. Columella curved, canal rather short and narrow. In the larger living shell no columellar callus concealing the spiral striae; in the smaller dead shell a week callus partly concealing the striae, especially on the rostrum. 36 x 16 mm. No operculum. Very pale translucent pink, protoconch golden-brown.
Animal pale, no eyes. Radula with to pairs of rather short, dagger-like teeth, apically barbed and flanged. Somewhat similar to the shells described as Typhlosyrinx pyrropelex, but the sulcus not so distinct and the columella more curved.

Larger of two syntypes (36,0 x 16.2 mm designated here as lectotype. Shell white, semitransparent, fragile. Protoconch of at least 3.5 brown whorls (upper whorls eroded) sculptured by numerous arcuate axial riblets on upper half, diagonally cancellated on lower half. Protoconch diameter 1.45 mm. Teleoconch of 4.75 evenly convex, rapidly expanding whorls. Whorls smooth initially, then obscure spiral striations appear, turning into rather strong and flattened cords about 60 on body whorl) covering the entire whorl except for narrow area just below upper suture. Strongest, most widely spaced cords situated on whorl shoulder. These cords appear first on shell. Interspaces between cords usually do not exceed the cord width at whorl periphery. Siphonal canal rather long, slightly twisted. Inner lip without callus. Based on growth lines, anal sinus subsutural, outer lip greatly projecting forward below sinus. Paralectotype with much smaller, proportionally broader shell 20.3 x 11.0 mm), its protoconch consisting of about 4,5 whorls. Upper whorls eroded, others with sculpture similar to that of lectotype. Protoconch diameter 1.35 mm. Spiral sculpture similar to that of respective whorls of lectotype. Sculpture irregular on most of body whorl, due to scar of heavy damage to shell. Inner lip covered by very thin callus.

The species corresponds well to the diagnosis of Xanthodaphne, and is quite similar to its type-species, X. membranacea. The only difference is that the protoconch sculpture in A. membranacea is mainly axial. However, the protoconch sculpture of A. subrosea tails within the range of variability characteristic of the genus in general (see Bouchet & Waren, 1980: figs. 234-237)