Profil taxonu
Obrázky
Autor: Scaperrotta et al.
Popis
Volvulella acuminata
Habitat: it lives in the infralittoral zone, in a sandy and muddy habitat often near Posidonia.
Distribution: it can be found all over the Mediterranean. Common enough.
Notes: this species has got an unmistakable shell morphology easily recognizable from all other species of the Family Retusidae since, as unique exception, it has neither gastric plaques nor radula. Stretched and tapered in outline, apex sharp. On a stretch median part is cylindrical then it tapers in basal part which is roundish. Aperture narrow and stretched, widened in the lower part. Lip thin, columella presents a quite distinct fold. Surface smooth and bright, semitransparent, with some slight spiral lines only more evident in the lower part of last whorl.
Assignment of this species either to the genus Volvulella Newton, 1891 or to the genus Rhizorus Montfort, 1810 is not yet clear as well as whether these genera are synonyms. Average measures of adult specimens reach 2.5-3 mm in height.
Habitat: it lives in the infralittoral zone, in a sandy and muddy habitat often near Posidonia.
Distribution: it can be found all over the Mediterranean. Common enough.
Notes: this species has got an unmistakable shell morphology easily recognizable from all other species of the Family Retusidae since, as unique exception, it has neither gastric plaques nor radula. Stretched and tapered in outline, apex sharp. On a stretch median part is cylindrical then it tapers in basal part which is roundish. Aperture narrow and stretched, widened in the lower part. Lip thin, columella presents a quite distinct fold. Surface smooth and bright, semitransparent, with some slight spiral lines only more evident in the lower part of last whorl.
Assignment of this species either to the genus Volvulella Newton, 1891 or to the genus Rhizorus Montfort, 1810 is not yet clear as well as whether these genera are synonyms. Average measures of adult specimens reach 2.5-3 mm in height.
Scaperrotta, M. ,Bartolini, S. & Bogi, C., 2011. Accrescimenti, Vol. 3. Stages of growth of marine molluscs of the Mediterranean Sea. (secondary description)
Autor: Jan Delsing
Odkazy a literatura
Galli C.: WMSDB - Wolrdwide Mollusc Species Data Base July 10, 2013 [http://www.bagniliggia.it/WMSD/WMSDhome....] [jako Volvulella acuminata (Bruguiere, 1792)]Datum citace: 23. listopad 2013
Repetto G., Orlando F. & Arduino G. (2005): Conchiglie del Mediterraneo, Amici del Museo "Federico Eusebio", Alba, Italy [jako Volvulella acuminata (Bruguière, 1792)] Petović S., Gvozdenović S., Ikica Z. (2017): An Annotated Checklist of the Marine Molluscs of the South Adriatic Sea (Montenegro) and a Comparison with Those of Neighbouring Areas, Turkish Journal of Fisheries and Aquatic Sciences 17: 921-934 [jako Volvulella acuminata (Bruguière, 1792)]
Tarruella Ruestes, A. (2002): Moluscos marinos de Cap Ras y Llançà (Girona, NE de la península Ibérica), Spira, 1(2): 1-14 [jako Volvulella acuminata (Bruguière, 1792)]