Herein we revise several Recent Mediterranean species of the rissoid genus Alvania Risso, 1826: scabra (Philippi, 1844), sculptilis (Monterosato, 1877), sororcula Granata-Grillo, 1877, lucinae Oberling, 1970, josefoi Oliver & Templado, 2009 and scuderii Villari, 2017. They represent a rather homogeneous group morphologically similar species, referred to as complex, which includes also some other from northeastern Atlantic. We designate neotype for Rissoa Philippi, 1844 lectotype oranica...

Notwithstanding few more or less recent contributions, taxonomy of the raphitomid extant species genus Clathromangelia Monterosato, 1884 (Gastropoda Caenogastropoda) remains almost controversial. Fossil materials revealed a wide diversity from Miocene to Pleistocene. Representatives in this seem be exclusively Mediterranean, with only doubtful taxa described for extra-Mediterranean localities. Species C. granum (R.A. Philippi, 1844) complex are here revised starting type material, among...

Abstract Most of accumulation curves tend to underestimate species richness, as they do not consider spatial heterogeneity in distribution, or are structured provide lower bound estimates and limited extrapolations. The total‐species (T–S) curve allows extrapolations over large areas while taking into account heterogeneity, making this estimator more prone attempt upper regional richness. However, the T–S may overestimate richness due (1) mismatch among units used model actual variation...

The distribution of molluscan assemblages across and along a vertical rocky cliff near Otranto (southern Adriatic Sea, Italy) was studied. Sampling undertaken in May November 2000 at three sites approximately 100 m apart. Three depths (5, 15, 25 m) were sampled each site, by scraping off replicate 20×20 cm quadrats. Samples yielded 6722 specimens, referred to as 133 species. Multivariate analyses showed that the structure significantly differed among with clear gradient from shallow deep...

The finding of new both recent and fossil materials the Mediterranean small abalone Haliotis stomatiaeformis Reeve, 1846 (Gastropoda Haliotiidae) allowed a more detailed study this rare species. Analogies between paleo-environment in which material is contextualized peculiar environment where nowadays it still lives are made on account faunal assemblage comparisons. Data morphology protoconch external soft parts chromatism iconography complete information set “neglected”

The earliest reported alien species that entered the Mediterranean after only nine years from inauguration of Suez Canal was "Meleagrina" sp., which subsequently identified as Gulf pearl-oyster, Pinctada radiata (Leach, 1814) (Bivalvia Pteriidae).Thereafter, an increasing series records this followed.In fact, nowadays it can be considered a well-established throughout basin.Since Red Sea isthmus to natural way migration, nobody has ever doubted about name assigned species, P. radiata, since...

The finding of some living specimens an alien bivalve the genus Isognomon Lightfoot, 1786 (Mollusca Bivalvia Isognomonidae) attached to rocks is here reported in Sicily for first time.This last a series numerous molluscs reports same area, which human-mediated model was supposed.An attempt indicate age are furnished on basis number byssus filaments.Some further environmental notes underline how recent times these species seem better integrated inside indigenous benthic communities Southern...

An unusual occurrence and massive stranding of the pelagic snail Janthina janthina (Linnaeus, 1758) (Gastropoda Epitoniidae) is reported along Sicilian coast Strait Messina (Italy). The diet Mediterranean species consisting Porpita porpita Velella velella (Hydrozoa) reported. Further information on genus Röding, 1798 are provided. Charts, photographs a video clip construction ‘raft’ by mollusc its predatory behaviour attached.

Changes in currents and temperature of the sea water, intensification maritime traffic increment knowledge on taxonomy some groups molluscs justify present second contribution to poorly known species Mollusca interesting biotope constituted by Strait Messina (North-Eastern Sicily). As our previous work, aim this new is give a better taxonomic definition iconography, through photographs drawings shell - as well external soft parts living animals when possible problematic which have stimulated...

Three new species, placed in the genus Discopsis de Folin, 1870 (Gastropoda Tornidae) are here described as from Plio-Pleistocene of Sicily on basis morphological characters. The first two, D. destefanii n. sp. and vivianorum sp., derived sandy clayey silt outcropping along shore left side mouth Nocella river (Castellammare Gulf, North-western Sicily). sp has been tentatively assigned to Imperator europaeum De Stefani, 1888 at attempt. After deeper researches, discrepancies between original...

The complicated nomenclatural history of Pusillina philippi (Aradas et Maggiore, 1844) complex (Gastropoda Rissoidae) and its taxonomy are here traced after the study large amount shells living specimens. A lectotype two paralectotypes among a group syntypes in Senckenberg Naturmuseum Frankfurt (Germany) designated to stabilize taxon for further researches. morphological variability shell this species is reconstructed comparisons with typical materials, morpho restricted Ionian localities...

Vitreolina micalii n. sp.(Gastropoda Eulimidae) is here described on materials found in shallow waters along the Northern coast of Catania (Eastern Sicily, Ionian Sea).Findings include both live-taken and empty specimens, whose shell soft parts have been observed documented.Further specimens few other localities Sicily Corsica.The new species morphologically distinguishable by a spiny, smooth shell, similar to some congeners except for details, sculptured protoconch.The different external...

In the present work we discuss validity of Putzeysia clathrata (Aradas, 1847) (Gastropoda Eucyclidae) currently considered synonym P. wiseri (Calcara, 1842), despite being type species genus Sulliotti, 1889.Reported as a fossil for Early Pleistocene Sicily and Calabria, it is here redescribed first time and, at same time, its taxonomic position discussed.

Continuing molecular and morphological investigations of a limpet recently reported as introduced to Sicily in the Mediterranean Sea have revealed it be an undescribed species Lottia Gray, 1833, genus that is native Sri Lanka vicinity northern Indian Ocean. The genetic features limpets compared from correspond so closely we do not hesitate describe collectively iani n. sp., with type locality Tangalle on coast Lanka. Much still unknown about its range, when how arrived Sicily, whether...

A new species of the genus Putzeysia Sulliotti, 1889 (Gastropoda Eucyclidae) is here described from infralittoral rocky bottoms Catania: P. rickyi n. sp.Empty shells have been found in a shell grit collected at base prehistoric lava escarpment low depth.The placed on basis morphological characters.In Mediterranean Sea this represented by single species, wiseri (Calcara, 1842), also known for other Lusitanic and North-eastern European localities.A comparison with close similar congeneric...

After a winter storm, with sirocco wind, hundreds of specimens the "mole crab" Albunea carabus (Linnaeus, 1758) (Decapoda Anomura Hippoidea) were beached along sandy coast "Playa" Catania (E-Sicily).Even though this species was previously recorded in some scattered localities Mediterranean, among which couple found Sicily, present record appears relevant on account massive finding specimens, is quite rare event according to literature data.Considerations reasons wide beaching complete note.

The present paper is focused on the Mediterranean representatives of neglected Gastropod family Rissoellidae, but some other not species are treated and figured for comparisons.This comprises minute dimensions almost smooth transparent spiral shell.This has led to errors misidentifications an objective difficulty in correct discrimination among species.Quite opposite, chromatism external soft parts clearly different according species: particular form, width colour hypobranchial gland seen...