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A redescription of Pseudopsammobia simplex (GB Sowerby III, 1894) [Bivalvia: Tellinidae] and the introduction of a new species from the Arabian region, Pseudopsammobia derelicta sp. nov.
Oliver, P. G., Dekker, H. & Al-Kandari, M.
The tellinid genus Pseudopsammobia is revisited and the type species P. simplex (Sowerby) from Hong Kong is redescribed. A new species P. derelictus Oliver, Dekker & Al-Kandari is described from Kuwait in the northern Arabian Gulf and disjunctly from the north-eastern Arabian Sea adjacent to Pakistan and northern India. Shells from Thailand and Australia are considered but are not adequately defined due to lack of material.
Key words: Taxonomy, Tellinoidea, Kuwait, Arabian Sea, Indo-West Pacific.
New records for Bolma girgyllus (Reeve, 1861) and Bolma recens (Dell, 1967) (Gastropoda: Turbinidae) extend their geographical distributions in the Philippines and Australia
Araya, J. F., Alf, A. & Aliaga, J. A.
New records for Bolma girgyllus (Reeve, 1861) are presented based on specimens collected at 165m depth West of Shark Bay, West Australia, and for Bolma recens (Dell, 1967) for specimens collected off Tinina, Balut Island, Mindanao, and off Luzon, Philippines. This is the first record of B. girgyllus in the entire Australian continent, and the southernmost record for the species, extending the previously known southern distribution record from New Caledonia by about three latitudinal degrees. Regarding B. recens, this is the first published record of this species in the Philippines, filling a gap in its extensive geographical range and extending its northern distribution in the Pacific Ocean. As deep-water species with a bentho-pelagic life cycle, it is probable that the present new records of B. girgyllus and B. recens reflect lack of sampling rather than migration; however, more sampling and Museum records analyses are needed to assess more accurate distributions for these turbinids.
Key words: Extension range, Turbininae, deep water, turban shells.
The endemic microsnail Sheitanok amidicus (Schütt & S¸ es¸en, 1991) was investigated to update its distribution and to raise awareness of its near-threatened status. S. amidicus specimens from Tüllük village (Paratype) (Devegeçidi Bridge, Diyarbakır), Kozluk town (Batman), Savur town (Mardin) and Elmabahce village (Mardin) were obtained from the Museum of Zoology, Dicle University, Diyarbakır, Türkiye. Kozluk, Savur and Elmabahçe locations were not specified in the previous studies of collectors Schütt and Şeşen. As a result of the surveys conducted at four springs in 2022, it was observed that the Tüllük spring was filled with construction debris, the Herbik spring (Elmabahçe) had dried up, and the level of water in Kozluk and Savur springs had significantly decreased. Some samples were collected from the Savur and Kozluk springs for comparison and confirmation. The species has an average shell size of 1.2–1.4mm wide and 0.8–1.0mm high and contains 3.5 or 4 highly convex whorls with moderately deep sutures that widen towards the aperture. Since S. amidicus lives in shallow springs, it quickly disappears when the source dries up. Notably, the species is in the IUCN Red List of threatened species as a near-threatened category. As a result, this current research could lead to conservation measures to protect the species from extinction. Furthermore, by reporting the colourful images and morphological features of this rare snail, which is the sole species in the genus, recording of the genus will be easier and more accurate.
Key words: Endemic, Near-threatened, Sheitanok amidicus, SE Türkiye.
Sadleriana bavarica Boeters, 1989, a younger synonym of S. fluminensis (Küster, 1852) (Truncatelloidea: Hydrobiidae)
Jaszczyńska, A., Hofman, S. & Falniowski, A.
The shell and genetic interpopulation differences (for mitochondrial cytochrome oxidase subunit I and nuclear histone 3) were studied for 21 localities of Sadleriana Clessin, 1890, representing nominal species: S. fluminensis (Küster, 1852), S. sadleriana (Frauenfeld, 1863), and S. robici (Clessin, 1890), all from the Balkans, and for S. bavarica Boeters, 1989, known only from one short stream within a park in Munich in Bavaria. Species distinctness was confirmed for S. robici, but not for S. sadleriana. The Bavarian S. bavarica was found to form a clade within the widely distributed and genetically variable S. fluminensis, also the shell and soft part morphology were the same for both taxa. Thus, Sadleriana bavarica Boeters, 1989 should be consider a younger synonym of S. fluminensis (Küster, 1853). The origin of the isolated Bavarian population is more likely to be explained by human transportation.
Key words: endemism, mtDNA, COI, H3, genetic differences, shell, human transportation.
A new hypselostomatid species, Anauchen eotvosi is described based on a sample collected around 1894–1895 at the “Shan-Siam Boundary” by R. G. Woodthorpe. This new species is characterized by five apertural barriers (1 parietal, 2 palatal, 1 basal, 1 columellar), which are much weaker than those of the similar species.
Key words: new species, Thailand, Myanmar, shelf life.
Pseudamussium peslutrae has a geographical range from southern Iceland and Norway southwards to the western Mediterranean Sea and North Africa. In this study, its biometrics were examined from two collections at mean depths of 353 and 517m from the Rockall continental slope, with only four scallops obtained at depths to 810m. Growth was based on the formation of shell rings, with one specimen having seventeen rings. Associates fouling the shells were classified according to nine taxa.
Key words: growth, boreal, pectinid, epifauna, predation.
Age structure and reproductive pattern of the rock-dwelling land snail Albinaria arcadica along an elevational gradient
Androulidaki, P.-D. & Giokas, S.
The age structure of the land snail Albinaria arcadica was studied in five populations on Mt. Chelmos (Peloponnisos, Greece), along an elevational gradient, between November 2018 and May 2019. Sampling took place every other month and shell height measurements were taken and analysed. Population growth rates varied between 11 months (one growing season) to 32 months (3 growing seasons) with the average rate being 18 months (two growing seasons). It was concluded that the species reproduces twice a year, in autumn and in spring.
Key words: Albinaria, Greece, age structure, reproduction, elevational gradient.
New record of Clithon faba (Sowerby, 1836) (Mollusca: Gastropoda: Neritidae) from India
Gaikwad, A., Pandey, V., Shekar, R., Sahu, B. & Thiruchitrambalam, G.
Obituary of Beata Maria Pokryszko (1956–2022)
Michael Kerney (1934–2022)
Preece, R. C.