| Waikura | |
|---|---|
 | |
| Waikura coronata (holotype at MNHN, Paris) | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Heterobranchia |
| Subcohort: | Panpulmonata |
| Superfamily: | Pyramidelloidea |
| Family: | Pyramidellidae |
| Genus: | Waikura Marwick, 1931 |
| Type species | |
| † Waikura torquesMarwick, 1931 | |
Waikura is a genus of very small sea snails, pyramidellid gastropod mollusks, or micromollusks. This genus is currently placed in the family Pyramidellidae . [1]
The original description by Marwick (1931) says that the genus consists of small shells that are subconical with a telescopic spire. The protoconch is heterostrophic and immersed. The sculpture consists of tubercles on the shoulders that extends axially for a short distance. There are no spiral sculpture except on the subsutural border. The surface is smooth and polished. The aperture is subrhombic with a highly sinuous outer lip that is convex below. Columella has a week tooth at the top.
Little is known about the biology of the members of this genus. As is true of most members of the Pyramidellidae sensu lato , they are probably ectoparasites.
Species within the genus Waikura include:
Pyramidellidae, common name the pyram family, or pyramid shells, is a voluminous taxonomic family of mostly small and minute ectoparasitic sea snails, marine heterobranch gastropod molluscs. The great majority of species of pyrams are micromolluscs.
Chrysallidinae is a taxonomic group of very small sea snails, marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Alcithoe is a genus of large sea snails, marine gastropod molluscs in the family Volutidae, the volutes.
Turritellidae, with the common name "tower shells" or "tower snails", is a taxonomic family of small- to medium-sized sea snails, marine gastropod molluscs in the Sorbeoconcha clade.
Agatha is a small genus of minute sea snails or marine gastropod mollusks within the subfamily Syrnolinae, which is a part of the family Pyramidellidae.
Besla is a small genus of miniature sea snails, pyramidellid gastropod mollusks in the family Pyramidellidae within the tribe Chrysallidini.
Egila is a genus of small sea snails, marine gastropod mollusks in the family Pyramidellidae, the pyrams and their allies.
Hinemoa is a genus of small sea snails, pyramidellid gastropod mollusks. This genus is currently placed in the subfamily Chrysallidinae, within the family Pyramidellidae.
Odostomia is the most speciose genus of minute sea snails, pyramidellid gastropod mollusks. This genus is placed in the family Pyramidellidae in the subfamily Odostomiinae. There are several hundred species in this diverse genus
Microvoluta is a genus of very small sea snails, marine gastropod molluscs in the family Volutomitridae.
Conjectura is a genus of very small sea snails or micromolluscs, marine gastropod molluscs in the family Conradiidae.
Maoricolpus, common name the "New Zealand screw shells", is a genus of sea snails, marine gastropod molluscs in the family Turritellidae, the Turritella snails.
Bathytoma is a genus of deep-water sea snails, marine gastropod mollusks in the family Borsoniidae.
Pyrgiscus is a genus of sea snails, marine gastropod mollusks in the subfamily Turbonillinae of the family Pyramidellidae, the pyrams and their allies.
Planpyrgiscus is a genus of sea snails, marine gastropod mollusks in the family Pyramidellidae, the pyrams and their allies.
Maoritomella is a genus of sea snails, marine gastropod mollusks in the family Borsoniidae.
Awateria is a genus of sea snails, marine gastropod mollusks in the family Borsoniidae. Most species in this genus have become extinct.
Filodrillia is a genus of sea snails, marine gastropod mollusks in the family Borsoniidae, the cone snails and their allies.
Austrotoma is a genus of sea snails, marine gastropod mollusks, unassigned to a family within the superfamily Conoidea.
Puha is an extinct genus of sea snails, marine gastropod mollusks in the family Raphitomidae.