Stomatocardia lobilatera

“side-lobed heart-mouth”
Kingdom
Microsynthera
Phylum
Plasticae
Class
Occlupanida
Order
Haplognatha
Genus
Stomatocardia
Species
lobilatera
External morphology

Four slight lobes on outer edge, like ‘proto-palps’. 21 mm x 19 mm.

To quote occlupanologist EF Lipton, “An odd little duck.”