World Congress of Malacology Antwerp ... - Unitas Malacologica

occurrence of this gastropod in the fossil record while nowadays its occurrences are spread southward
along the western Pacific active zone. The Cretaceous seeps are densely settled also by ataphrid
gastropods which might be related to turbinids. This species was apparently an early member of
Japanese type of chemosynthesis-based communities as nowadays similar gastropod is known
exclusively from a single spot at hot vent field in Okinawa Through. Least but not last, the
Cretaceous methane seep deposits contain high diversity of provannids and/or provannid-like
gastropods. Silicified Cenomanian provannids from the Kanajirisawa locality (Tappu area of
Hokkaido) preserved details of their protoconchs proving undoubtedly their pre-Cenomanian origin.
These decollate protoconchs of Cenomanian provannids are strikingly similar to their recent
counterparts widely distributed in most of the chemosynthesis-based communities. Lack of other
animals so common in the recent chemosynthesis-based communities accounts on their post-
Cretaceous origin.
The laboratory tests on some chemicals in reducing slug grazing
Kałuski, Tomasz; Kozłowski, Jan; Jaskulska, Monika
Institute of Plant Protection, Department of Zoology, Miczurina 20, 60-318 Poznan, Poland,
Email: tomaszkaluski@@tlen.pl
Arion lusitanicus Mabille, 1868 (Gastropopda: Pulmonata: Arionidae), is one of the most important
pest in the south Poland where cause serious damage to vegetables, ornamentals and crops. Control
of this slug, as others, augment a lot of problems. In the Poland there are only six molluscicides
registered with only two active substances: methiocarb and metaldehyde. Efficiency of these plant
protection products is usually disappointed, moreover these molluscicides can be harmful for
beneficial organisms. That’s why new substances and new methods for control slug populations has
to be studied. In the 2007 in the Institute of Plant Protection laboratory tests on effectiveness of some
chemicals in reducing slug grazing and damage to plants were carried out. The tests were made on
Chinese cabbage leaves and oilseed rape seedlings with 13 active substances in two concentrations.
The active substances from different chemical groups were tested: monoterpens (α-pinen, α-terpineol,
limonene, carvone), triterpens glycosides (saponin from roots of Saponaria officinalis), tannins
(tannin), alkaloids (9-amino-1,2,3,4-tetrahydroacridine, benzylnicotine), dimethyl dithiocarbamates
(thiram), molluscicides (metthiocarb, metaldehyde) and amino acids (acetylcysteine). The acetyl
cysteine was tested separately and in solutions with methiocarb, metaldehyde and thiram. In
presented experiments the vitality of slugs and percentage of damage to leaves of cabbage and
oilseed rape seedlings were noted. The best results in reducing slug grazing were showed by
methiocarb in both tested concentrations (0.1 and 0.5%). The good results against slugs were also
obtained with carvone, α- pinen and mixtures: methiocarb and metaldehyde with acetylcysteine. The
obtained results showed that consecutive tests with tested active substances in different
concentretions should be made. The future experiments should concern on other natural substances
which can impact on slugs activity and feeding.
Cryptic diversity of gastropods in oxygen-poor intertidal habitats; systematics, ecology and
evolution of the Phenacolepadidae
Kano, Yasunori
Department of Biological Production and Environmental Science, University of Miyazaki, 1-1
Gakuen-kibanadai-nishi, Miyazaki 889-2192, Japan,
Email: kano@cc.miyazaki-u.ac.jp
Over the last three decades, increasing attention has been paid to reveal the taxonomic and
evolutionary diversity of gastropods in deep-sea hydrothermal vents and cold seeps as well as in
sunken-wood and whalebone communities. Yet, few scientists acknowledge the presence of a
gastropod assemblage associated with similar, dysoxic and sulphide-rich environments in more easily
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