- Source: Provanna
Provanna is a genus of sea snails, marine gastropod mollusks in the family Provannidae.
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
Species within the genus Provanna include:
Provanna abyssalis Okutani & Fujikura, 2002
Provanna admetoides Warén & Ponder, 1991
† Provanna alexi Amano & Little, 2014
† Provanna antiqua Squires, 1995
† Provanna azurini Kiel, Aguilar & Kase, 2020
Provanna beebei Linse, Nye, Copley & C. Chen, 2019
Provanna buccinoides Warén & Bouchet, 1993
Provanna chevalieri Warén & Bouchet, 2009
Provanna cingulata C. Chen, Watanabe & Ohara, 2018
Provanna clathrata Sasaki, Ogura, Watanabe & Fujikura, 2016
Provanna cooki Linse, Nye, Copley & C. Chen, 2019
Provanna fenestrata C. Chen, Watanabe & Sasaki, 2019
† Provanna fortis Hybertsen & Kiel, 2018
Provanna glabra Okutani, Tsuchida & Fujikura, 1992
Provanna goniata Warén & Bouchet, 1986
† Provanna hirokoae Amano & Little, 2014
Provanna ios Warén & Bouchet, 1986
Provanna kuroshimensis Sasaki, Ogura, Watanabe & Fujikura, 2016
Provanna laevis Warén & Ponder, 1991
Provanna lomana (Dall, 1918)
Provanna lucida Sasaki, Ogura, Watanabe & Fujikura, 2016
Provanna macleani Warén & Bouchet, 1989
† Provanna marshalli Saether, Little & K. A. Campbell, 2010
Provanna muricata Warén & Bouchet, 1986
† Provanna nakagawaensis Kaim, Jenkins & Hikida, 2009
Provanna nassariaeformis Okutani, 1990
Provanna pacifica (Dall, 1908)
† Provanna pelada Kiel, Hybertsen, Hyžný & Klompmaker, 2019
Provanna reticulata Warén & Bouchet, 2009
Provanna sculpta Warén & Ponder, 1991
Provanna segonzaci Warén & Ponder, 1991
Provanna shinkaiae Okutani & Fujikura, 2002
Provanna stephanos C. Chen, Watanabe & Sasaki, 2019
Provanna subglabra Sasaki, Ogura, Watanabe & Fujikura, 2016
† Provanna tappuensis Kaim, Jenkins & Warén, 2008
† Provanna urahoroensis Amano & Jenkins, 2013
Provanna variabilis Warén & Bouchet, 1986
Several fossil species have been described, predominantly identified from hydrocarbon seep deposits (Saether et al., 2010), including:
Provanna antiqua Squires & Goedert, 1995
Provanna marshalli Saether, Little & Campbell, 2010
Provanna nakagawaensis Kaim, Jenkins & Hikida, 2009
Provanna tappuensis Kaim, Jenkins & Warén, 2008
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
Provanna marianensis Okutani & Fujikura, 1990: synonym of Desbruyeresia marianensis (Okutani & Fujikura, 1990)
References
Healy, J. M. 1990. Taxonomic affinities of the deep-sea genus Provanna: new evidence from sperm structure; J. Molluscan Stud. 56: 119-122
Warén, A. & Bouchet, P. (1993). New records, species, genera, and a new family of gastropods from hydrothermal vents and hydrocarbon seeps. Zoologica Scripta. 22: 1-90.
Spencer, H.G., Marshall, B.A. & Willan, R.C. 2009 Recent Mollusca. pp 196–219 in: Gordon, D.P. (Ed.), The New Zealand inventory of biodiversity. 1. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. Canterbury University Press, Christchurch
Saether, K.P., Little, C.T.S. & Campbell, K.A. (2010) A new fossil provannid gastropod from Miocene hydrocarbon seep deposits, East Coast Basin, North Island, New Zealand. Acta Palaeontologica Polonica 55, 507–517.
External links
Dall, W. H. (1918). Description of new species of shells, chiefly from Magdalena Bay, Lower California. Proceedings of the Biological Society of Washington. 31: 5-8
Sasaki T., Ogura T., Watanabe H.K. & Fujikura K. (2016). Four new species of Provanna (Gastropoda: Provannidae) from vents and a seep off Nansei-shoto area, southwestern Japan. Venus. 74 (1-2): 1-17