Placoscytus jereaeformis Schrammen 1910 Placoscytus jereaeformis is a rare and comparatively small sponge. It forms single finger-like or composite sponge bodies, consisting of several individuals. The cylindrical sponge bodies show a coaxial striation made up of sinuous, anastomosing grooves. Several postica of coaxial channels are found on the truncated top end.

Placoscytus jereaeformis has been placed into the the family Jereidae by De Laubenfels (1955). However, the spicules of the specimen described above are heavily warted tetraclones with strogly branching terminations, and the dermal scleres are phyllotriaenes, as described by Schrammen (1910), and thus do not justify such a classification. Instead, Placoscytus jereaeformis has been relocated into the Family Discodermiidae of the classification of by De Laubenfels (1955), as originally envisaged by Schrammen (1910).