This species has four distinct body regions: the anterium (with the oral shield), the anterior trunk, the posterior trunk, and the
H Prochaetoderma yongei H Chevroderma turnerae H Chaetoderma argenteum posterium. This species typically has an anterior trunk either equal in diameter to, or narrower than, the neck and longer than the posterior trunk. Dense erect spicules on anterior trunk; more sparse flat spicules against posterior trunk. The oral shield is unpaired and cleft dorsally. Posteriorly the dor-soterminal sense organ is obvious and about 0.04 in (1 mm) in length in large specimens. The spicules of the posterium do not form a terminal ring. Greatest length to more than 1.6 in (40 mm). Radula with a large, cone-shaped cuticular piece and a single pair of denticles. Denticles are rather small. The cuticular dome extends proximally one-half the length of cone.
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