| Halystina simplex | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Superfamily: | Seguenzioidea |
| Family: | Seguenziidae |
| Subfamily: | Seguenziinae |
| Genus: | Halystina |
| Species: | H. simplex |
| Binomial name | |
| Halystina simplex (Barnard, 1963) | |
| Synonyms [1] | |
| |
Halystina simplex is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae. [1]
Conus algoensis, common name the algoa cone, is a species of sea snail, a marine gastropod mollusk in the family Conidae, the cone snails and their allies.

Sukashitrochus is a genus of sea snails, marine gastropod mollusks in the family Scissurellidae.
Pepta is a genus of sea snails, marine gastropod mollusks in the family Cancellariidae, the nutmeg snails.

Obesotoma is a genus of sea snails, marine gastropod mollusks in the family Mangeliidae.
Mohnia is a genus of sea snails, marine gastropod mollusks in the family Buccinidae, the true whelks.
Halystina globulus is a species of sea snail, a marine gastropod mollusk in the family Seguenziidae.
Halystina is a genus of sea snails, marine gastropod mollusks in the subfamily Seguenziinae of the family Seguenziidae.
Seguenzia is a genus of sea snails, marine gastropod mollusks in the family Seguenziidae.
Serrata is a genus of sea snails, marine gastropod mollusks in the family Marginellidae, the margin snails.
Enatimene is a genus of sea snails, marine gastropod mollusks in the family Muricidae, the murex snails or rock snails.
Janoliva is a genus of sea snails, marine gastropod mollusks in the family Olividae.
Capulus is a genus of small sea snails, marine gastropod mollusks in the family Capulidae, the cap snails.

Verconia simplex is a species of colourful sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Chromodorididae.
Acremodontina simplex is a species of sea snail, a marine gastropod mollusk in the family Trochaclididae, the false top snails.
Halystina caledonica is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae.
Halystina carinata is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae.
Halystina siberutensis is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae.
Halystina vaubani is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae.
Charisma simplex is a species of extremely small sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Halystina umberlee is a species of very small deep-water sea snail, a marine gastropod mollusc in the family Seguenziidae.
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