Ilyanassa obsoleta Key Image
Ilyanassa obsoleta (Say, 1822)
EASTERN MUDSNAIL, COMMON MUD SNAIL, EASTERN MUD WHELK, MUD DOG WHELK, BLACK DOG WHELK, WORN-OUT DOG WHELK, EASTERN MUD NASSA, MUD BASKET SNA
- Kingdom: Animalia
- Phylum: Mollusca
- Class: Gastropoda
- Subclass: Prosobranchia
- Order: Neogastropoda
- Family: Nassariidae
Ilyanassa obsoleta has a plain, dark black or brown shell, 1.5-3 cm high, with 5-6 whorls (a whorl is one complete turn of the spiral shell) and a blunt, conical spire. The shell's surface is decorated with a network of weak, beaded lines. The aperture (the opening through which the snail emerges) is roughly oval and about half the height of the shell, with a notch at the bottom.
Ilyanassa obsoleta
Littorina saxatilis 
Littorina littorea
Busycotypus canaliculatus
Urosalpinx cinerea
Myosotella myosotis 
