Volume 25

On the basis of the newly available material, the previously monotypical genus Fusipagoda was revised. In addition to the type species, Mohnia exquisita, two more were attributed to the genus – Colus sapius and Mohnia corbis. A new species, Fusipagoda itohabei sp. nov., is described.

Buccinum rodgersi Gould, 1860, described from the Bering strait (between the Bering and Chukchi Seas) was never recorded or mentioned in literature since 1883 (with the exception of bibliographical work of R. Johnson, 1964). As it was found that although the species name is not used in current literature, the species was recorded in the Far-East seas of Russia [Sirenko et al., 2013] under the other name, Plicifusus mcleani Sirenko, 2009. In this paper Buccinum rodgersi is transferred to Plicifusus Dall, 1902. Plicifusus mcleani Sirenko, 2009 is considered as its junior synonym.

In May 2014, numerous specimens of Cepaea hortensis were found in Vidnoe, a town 5 km south from the Moscow City. C. hortensis is the third species of the genus introduced in the Moscow Region. The nearest locality of C. hortensis is known from the Vitebsk Region of the Republic of Belarus (about 550 km W of Moscow). Now C. hortensis is reported from one site of Vidnoe town, where it forms a stable population. Also, a few specimens of this species were collected in the park of Timiryazev’s Agriculture Academy in northern part of Moscow City.

The anatomical study of slugs, collected between 2009 and 2015 in Dnepropetrovsk, Donetsk, Lvov and Kharkov Regions of Ukraine, shows the presence of only one species from the complex Arion subfuscus. By size, colour and position of the gonad, relative width of the anterior part of oviduct and by the arrangement of distal parts of reproductive system all studied specimens belonged to Arion fuscus.

Dissection of adult specimens of Campylaea illyrica showed that penial papilla of this species
is very similar to those of the type species of the genus Faustina.

In the field of zoological (and palaeontological) research, accurate documentation methods for the exo-morphology are essential. Here we propose a new method for the documentation of cephalopod paralarvae and juveniles. For documenting small-sized cephalopods autofluorescence microscopy offers numerous advantages for the presentation of outer body parts and surface structures in high resolution, partially also of internal structures such as the gladius. Structures are especially well-contrasted compared to other imaging methods, such as white-light microscopy, micro- or macrophotography. This facilitates a detailed view in high resolution at even the smallest cephalopod paralarvae. Autofluorescence imaging, combined with composite imaging, creates sharp, evenly illuminated pictures. In its higher magnification ranges it can be well compared to low-magnifying scanning electron microscopy (SEM) images, but with the advantage that the drying, mounting and preparation needed for SEM is not necessary for autofluorescence microscopy. In contrast the method enables the direct documentation of specimens inside their storage liquid. This is especially important for the investigation of rare specimens, e.g., for historical material from museum collections, or as a pre-documentation for specimens that will be processed further with an invasive method. By the use of different excitation wavelengths it is furthermore possible to either enhance surface structure details or certain inner body structures. Autofluorescence microscopy is also excellent for the imaging of certain types of small-sized fossil cephalopods, not least as the contrast against the matrix can be significantly improved. All these methods and the associated opportunities for studying cephalopod paralarvae are explored in this study.

Son La is a province in the north-western Vietnam, the mountain chain running along the Northwest-Southeast has a phylogenetically diverse terrestrial snail fauna dominated by endemic species, which are very little known so far. This is the first checklist of the terrestrial prosobranch snails from Son La. It includes 42 species, belonging to 17 genera in five families, of which three species are endemic (Dioryx vanbuensis, Cyclophorus implicatus, and Scabrina vanbuensis). In this study two species are recorded for the first time for Vietnam (Chamalycaeus paviei, Scabrina laciniana) and 32 additional species are added to the species list of the Son La.

In 1881 expedition of the Bremen Geographical Society collected molluscs in the north-western part of the Bering Sea off the coast of Chukotka. Unfortunately, the result of this work has not been fully appreciated by Russian malacologists since it was believed that the German expedition was working in American, not Asian waters. In this paper, On the basis of materials from the collection of the Berlin Museum of Natural History and published data it is proved, that molluscs were collected off Asian coast. Photos of the types of Gastropoda described A. Krause, are presented for the first time. "Bela" luetkeana Krause, 1885 (Mangeliidae) is attributed herein to the genus Propebela Iredale, 1918.

A new species of chiton, Leptochiton antarcticus n. sp., is described from the Southern Ocean from depths of 87-1,524 m. The new species is distinguishable from other congeneric species by the shape of head of major lateral teeth of radula, dorsal scales and anterior position of mucro.