Provanna

Provanna
Temporal range: Cretaceous-Recent
Provanna hirokoae
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Caenogastropoda
Superfamily: Abyssochrysoidea
Family: Provannidae
Genus: Provanna
Dall, 1918
Type species
Trichotropis (Provanna) lomana Dall, 1918

Provanna is a genus of sea snails, marine gastropod mollusks in the family Provannidae.[1]

The species was named after Dall's first wife.

This is a very old genus with species already existing in Cretaceous seep deposits off Japan (93 - 100 million years ago). The Caribbean and the Pacific fauna were isolated about 3 million years ago by the closure of the Central American Isthmus.

Description

The apical whorls of the protoconch are lacking through decollation. The opening is then sealed with a calcareous plug. The sculpture of the ovate fusiform shell shows scattered sigmoidal axial ribs that are crossed by spiral cords. The whorls are broad.

Habitat

They are common in hydrothermal vents, hydrocarbon cold seeps and (more rarely) on deep-water food-falls, depending on the species. Most species feed on filamentous bacteria, while others feed on detritus.

Species

Provanna alexi

Species within the genus Provanna include:

Several fossil species also have been described, predominantly identified from hydrocarbon seep deposits (Saether et al., 2010), including:

There also are several fossil species known, but not formally described and named, from Central America, Japan, and possibly the Philippines (see Saether et al., 2010).

Species brought into synonymy

References

  1. ↑ Provanna Dall, 1918.  Retrieved through: World Register of Marine Species on 4 May 2010.
  2. ↑ Provanna abyssalis Okutani & Fujikura, 2002.  Retrieved through: World Register of Marine Species on 4 May 2010.
  3. ↑ Provanna admetoides Warén & Ponder, 1991.  Retrieved through: World Register of Marine Species on 4 May 2010.
  4. ↑ Provanna buccinoides Warén & Bouchet, 1993.  Retrieved through: World Register of Marine Species on 4 May 2010.
  5. ↑ Provanna chevalieri Warén & Bouchet, 2009.  Retrieved through: World Register of Marine Species on 4 May 2010.
  6. ↑ Provanna glabra Okutani, Tsuchida & Fujikura, 1992.  Retrieved through: World Register of Marine Species on 4 May 2010.
  7. ↑ Provanna goniata Warén & Bouchet, 1986.  Retrieved through: World Register of Marine Species on 4 May 2010.
  8. ↑ Provanna ios Warén & Bouchet, 1986.  Retrieved through: World Register of Marine Species on 4 May 2010.
  9. ↑ Provanna laevis Warén & Ponder, 1991.  Retrieved through: World Register of Marine Species on 4 May 2010.
  10. ↑ Provanna lomana (Dall, 1918).  Retrieved through: World Register of Marine Species on 4 May 2010.
  11. ↑ Provanna macleani Warén & Bouchet, 1989.  Retrieved through: World Register of Marine Species on 4 May 2010.
  12. ↑ Provanna muricata Warén & Bouchet, 1986.  Retrieved through: World Register of Marine Species on 4 May 2010.
  13. ↑ Provanna nassariaeformis Okutani, 1990.  Retrieved through: World Register of Marine Species on 4 May 2010.
  14. ↑ Provanna pacifica (Dall, 1908).  Retrieved through: World Register of Marine Species on 4 May 2010.
  15. ↑ Provanna reticulata Warén & Bouchet, 2009.  Retrieved through: World Register of Marine Species on 4 May 2010.
  16. ↑ Provanna sculpta Warén & Ponder, 1991.  Retrieved through: World Register of Marine Species on 4 May 2010.
  17. ↑ Provanna segonzaci Warén & Ponder, 1991.  Retrieved through: World Register of Marine Species on 4 May 2010.
  18. ↑ Provanna shinkaiae Okutani & Fujikura, 2002.  Retrieved through: World Register of Marine Species on 4 May 2010.
  19. ↑ Provanna variabilis Warén & Bouchet, 1986.  Retrieved through: World Register of Marine Species on 4 May 2010.
  20. ↑ Steffen Kiel, New Records and Species of Molluscs from Tertiary Cold-Seep Carbonates in Washington State, USA; Journal of Paleontology, Vol. 80, No. 1 (Jan., 2006), pp. 121-137
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