Provannidae
| Provannidae Temporal range: Cenomanian–Recent |
|
|---|---|
 |
|
| Two preserved individuals of Alviniconcha hessleri | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| (unranked): | clade Caenogastropoda |
| Superfamily: | Abyssochrysoidea |
| Family: |
Provannidae Warén & Ponder, 1991 |
| Type genus | |
|
Provanna Dall, 1918 |
|
| Synonyms | |
|
Pseudonininae Bertolaso & Palazzi, 1994 |
|
Pseudonininae Bertolaso & Palazzi, 1994
Provannidae is a family of deep water sea snails, marine gastropod mollusks in the superfmaily Abyssochrysoidea (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005 and updated in 2008 by Kaim et al.).
The genera Provanna and Desbruyeresia have smaller and slender shells, while the shells of Alviniconcha and Ifremeria are larger and swollen. The shells of these two last genera house a hypertrophied ctenidium large quantities of symbiotic bacteria.
These snails are part of the fauna of the deep-sea hydrothermal vents, cold seeps, whale falls, and sunken driftwood environments.
The family Provaniidae was previously placed in the "Zygopleuroid group" (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). This family has no subfamilies according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005.
Subsequently Provaniidae was placed in the superfamily Abyssochrysoidea Tomlin, 1927.
There are some affinities with the Littorinoidea as shown by molecular data and sperm ultrastructure
Multi-gene analysis has shown that the family Provannidae is paraphyletic. It is being treated as belonging to the superfamily Abyssochrysoidea until a new family-level revision has been undertaken.
...
Wikipedia