World Congress of Malacology Antwerp ... - Unitas Malacologica

Bank (480-1250 m depth), six stations of Irving Bank (670-1150 m depth) and five stations of Plato
Bank (580-920 m depth).
The shell morphology at SEM as well as the description of the identifying features of 12 species are
presented in this communication: Cranopsis asturiana (9 specimens), Cranopsis larva (27
specimens), Cranopsis sp 1. (306 specimens), Cranopsis sp 2. (4 specimens), Puncturella sp. (14
specimens), Profundisepta profundi (272 specimens), Profundisepta alicei (10 specimens),
Profundisepta sp. (9 specimens), Diodora edwardsi (11 specimens), Cornisepta crossei (173
specimens), Cornisepta microphyma (243 specimens) and Cornisepta sp. (27 specimens).
Historical biogeography and phylogenetics of the Pacific Succineidae
Cowie, Robert H.; Holland, Brenden S.
Center for Conservation Research and Training, Pacific Biosciences Research Center, University of
Hawaii, 3050 Maile Way, Gilmore 408, Honolulu, Hawaii 96822, USA,
cowie@hawaii.edu; bholland@hawaii.edu
Succineidae are distributed worldwide but have diversified into numerous single island or
archipelago endemics in the Pacific, where approximately 100 species are currently considered valid.
Fundamental to this diversification is over-ocean passive dispersal, since few of these Pacific islands
were ever connected to continental land masses, and in many cases were not connected to other
islands within their respective archipelagoes. Vicariance also played a role within archipelagos as
islands broke up or coalesced as a result of ongoing geological processes and fluctuating sea levels.
Here we address Pacific succineid phylogenetics and biogeography using a molecular approach.
Our data indicate an overall pattern of extensive passive dispersal. For a number of assemblages a
lack of monophyly implies multiple colonizations, viz. 1) the Hawaiian islands - two distinct
lineages; 2) Tahiti - 2 lineages, one of which originated on the island of Hawaii; 3) Samoa - 2
lineages, one of which originated on the Hawaiian island of Kauai; 4) Galapagos Islands - 2 lineages,
the main lineage related to New World species, the other originating in New Zealand; 6) Japan - three
lineages, one related to Ogasawaran and Chinese groups, another to species from New Guinea and
Vanuatu. In addition, a single species occurs in the Samoan, Marquesas, Cook and Austral Islands,
and is most closely related to an Australian species; and a lineage on Saipan shares haplotypes with a
Costa Rican species.
Within the Hawaiian Islands most species are single island endemics (39/42, 93%), but Succinea
caduca occurs on all main islands, even those that have never shared an above water connection,
suggesting enhanced passive dispersal. Haplotype analyses suggest historically enhanced gene flow
among Maui Nui and Oahu, further suggesting that past island connections have been important in
the evolution of this species.
Rissoa panhormensis (Gastropoda: Rissoidae) morphotypes analysis vs species identity
Criscione, Francesco 1 ; Scuderi, Danilo 2 ; Patti, Francesco Paolo 1
1. Zoological Station "A. Dohrn" - Benthic Ecology Laboratory, Punta S. Pietro, 1, 80077 Ischia
(NA), Italy,
Email: francesco.criscione@szn.it; fpatti@szn.it
2. Department of Animal Biology – Catania University, via Androne, 81, 95124 Catania, Italy,
Email: danscu@tin.it
In a landmark paper on the subgenera Apicularia and Goniostoma of the genus Rissoa
(Prosobranchia, Rissoidae), Verduin (1985) described the new species Rissoa panhormensis, basing
his observations on few empty shells probably dredged from Palermo (Sicily, Mediterranean). One
holotype and six paratypes are now housed in the Institut Royal des Sciences Naturelles de Belgique.
Recently, during a sampling campaign carried out by the authors in the Gulf of Catania (Ionian Sea),
living specimens belonging to this taxon have been found together with several specimens of the
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