Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Basommatophora
Family: Lymnaeidae
Genus: Lymnaea
Species: Lymnaea

This small air-breathing freshwater snail is in the Lymnaea genus. It was one of numerous 10 mm long, totally black snails living in a freshwater farm pond that was covered with the indigenous floating fern Azolla rubra (Red azolla).

Pond snail Genus Lymnaea.JPG

Pond snail Genus Lymnaea-001.JPG

Place: Pungatawa Rd, East of Taihape, North Island. The pond
Azolla rubra.JPG

Thanks to Wikipedia for text and information: https://creativecommons.org/licenses/by-sa/3.0/