| 词条 | Provanna |
| 释义 |
| name = Provanna | fossil_range = {{fossil range|Cretaceous|Recent|Cretaceous-Recent}} | image = Provanna hirokoae.png | image_caption = Provanna hirokoae | regnum = Animalia | phylum = Mollusca | classis = Gastropoda | unranked_superfamilia = clade Caenogastropoda | superfamilia = Abyssochrysoidea | familia = Provannidae | subfamilia = | genus = Provanna | genus_authority = Dall, 1918{{No-gastropod-genus-ref}} | synonyms_ref = | synonyms = | 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. DescriptionThe 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. HabitatThey 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. SpeciesSpecies 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).
References1. ^{{WRMS species|391510|Provanna Dall, 1918||4 May 2010}} 2. ^{{WRMS species|395595|Provanna abyssalis Okutani & Fujikura, 2002||4 May 2010}} 3. ^{{WRMS species|419518|Provanna admetoides Warén & Ponder, 1991||4 May 2010}} 4. ^{{WRMS species|450001|Provanna buccinoides Warén & Bouchet, 1993||4 May 2010}} 5. ^{{WRMS species|458599|Provanna chevalieri Warén & Bouchet, 2009||4 May 2010}} 6. ^{{WRMS species|450002|Provanna glabra Okutani, Tsuchida & Fujikura, 1992||4 May 2010}} 7. ^{{WRMS species|450003|Provanna goniata Warén & Bouchet, 1986||4 May 2010}} 8. ^{{WRMS species|450004|Provanna ios Warén & Bouchet, 1986||4 May 2010}} 9. ^{{WRMS species|450005|Provanna laevis Warén & Ponder, 1991||4 May 2010}} 10. ^{{WRMS species|450006|Provanna lomana (Dall, 1918)||4 May 2010}} 11. ^{{WRMS species|450007|Provanna macleani Warén & Bouchet, 1989||4 May 2010}} 12. ^{{WRMS species|450008|Provanna muricata Warén & Bouchet, 1986||4 May 2010}} 13. ^{{WRMS species|450009|Provanna nassariaeformis Okutani, 1990||4 May 2010}} 14. ^{{WRMS species|450010|Provanna pacifica (Dall, 1908)||4 May 2010}} 15. ^{{WRMS species|458600|Provanna reticulata Warén & Bouchet, 2009||4 May 2010}} 16. ^{{WRMS species|419519|Provanna sculpta Warén & Ponder, 1991||4 May 2010}} 17. ^{{WRMS species|450011|Provanna segonzaci Warén & Ponder, 1991||4 May 2010}} 18. ^{{WRMS species|395596|Provanna shinkaiae Okutani & Fujikura, 2002||4 May 2010}} 19. ^{{WRMS species|450012|Provanna variabilis Warén & Bouchet, 1986||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
External links{{commons category|Provanna}}{{Taxonbar|from=Q7252287}} 1 : Provannidae |
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