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Southward, 1986). A particular redox situation in that area is confirmed by the presence,
in the same station of Myrtea spinifera (one specimen.) and Lucinella divaricata (one
specimen), all bivalves which have symbiotic H2S-oxidant bacteria in the gills (Dando
et al., 1985; Dando et al., 1986).

In the Egadi Archipelago (Tab. 3) 139 individuals, belonging to 42 species, were
found. On the 42 station investigated, only 24 had living molluscs.

Tab. 4 - Species list, and total number of collected specimens (TNS) in the Partenopean Archipelago.
In brackish is reported the number of stations investigated for each island.

Bionomical PR CA IS TNS

features (4) (12) (14)

Abra nitida (O.F.Müller) VTC excl 11

Anadara diluvii (Lamarck) DC pref 1 1

Anomia ephippium L. LRE 1 1

Arca tetragona Poli DC 11

Astarte fusca (Poli) Glar 16 8 15

Astarte sulcata (Da Costa) DL excl 1 12

Bivalvia indet. 3 14

Callista chione (L.) LRE-lim toll 11

Calyptraea chinensis (L.) SD 1 1 2

Chamelea gallina (L.) SFBC pref 1 1

Clausinella fasciata (Da Costa) DC pref 1 45

Corbula gibba (Olivi) Ind.inst.-SO 3 14

Cuspidaria rostrata (Spengler) DL pref 1 1

Emarginula adriatica O.G.Costa SD 11

Glans aculeata (Poli) Mixt. 11 2

Haminea sp. 11

Lepidopleurus (P.) africanus Nierstrasz DC 1 23

Lima (L.) marioni Fischer 11

Limatula subauriculata (Montagu) DC pref 11

Myrtea spinifera (Montagu) Ind.SO 71 8

Neverita josephinia Risso SFBC/SFBC excl 11

Nucula sulcata Bronn Ind.inst.-lim.str. 18 3 4 25

Nuculana commutata (Philippi) DC-DE-DL 1 12

Opistobranchia indet. 1 12

Pitar rudis (Poli) DC pref 2 24

Plagicardium papillosum (Poli) DC pref 41 27

Prosobranchia indet. 11

Psammobia costulata Turton SGCF excl 1 12

Psammobia (P.) fervensis (Gmelin) DC excl 11

Pteromeris minuta (Scacchi) 22

Solemya togata (Poli) HP 22

Tectonatica filosa Philippi 11

Tellina balaustina L. Mixt. 14 7 12

Tellina donacina L. DC excl 12 14

Tellina pulchella Lamarck SFBC/SFBC excl 1 1

Tellina serrata Brocchi DL 22

Thracia papyracea (Poli) SFBC excl 11

Timoclea ovata (Pennant) DC-DE-DL 1 1

Venus casina L. SGCF excl 11

Volvarina mitrella (Risso) 11

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