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Mina Azhary, Elham Ahmadi,
Volume 10, Issue 2 (9-2023)
Abstract

Molluscs are important pests of natural and agricultural ecosystems, by feeding on different parts of leaves, stems, flowers, buds, fruits and roots of different plant hosts, reducing the marketability of annual agricultural products and damage plant species in different habitats in the country. Moreover, they are intermediate hosts of human and cattle parasites, and therefore are of medicinal and veterinary importance. In this study, snails and slugs were sampled from nine designated stations located in the south and west regions of Tehran province, considering their natural condition, vegetation, location of gardens and fields, soil or subsoil types, from the beneath of rocks and trunks, water bodies and other areas related to the habitat of snails and slugs. Samples were made using sampling nets or gathered directly by hand from plants, shrubs and river banks. Overally, 17 species belonging to 12 genera from nine families were collected and identified. Identification was done according to morphometric characters including shape, size of shell, dextral and sinistral position of the shell, operculum, aperture, radula, mucus colour, respiratory pore, keel, renal ridge and reproduction system. The highest and lowest mollusc species diversity among the stations studied were turned to be 16 and 6 species belong to station 9 (west of Tehran province) and station 2 (south of Tehran province), respectively. The most commonly diversed family was Hellicidae with 5 species, i.e., Monacha cantiana, Euomphalia pisiformis, Helicella krynickii, Helicella derbentina, Caucasotachea atrolabiata. Also, Lymnaea truncatula is identified as the most frequent species, which has medical importance. Monacha cantiana was identified in the present study and reported for the first time from Iran. All the samples and their respective spatial and temporal information were made available in the museum of the Agricultural Zoology Research Department in Iranian Research Institute of Plant Protection.

Elham Ahmadi, Nasim Aghaei Delche,
Volume 10, Issue 4 (3-2024)
Abstract

       Continuous environmental monitoring is one of the important principles of management and is environmental assessment axis, and molluscs are one of the biological indicators of ecosystem quality. For this purpose, snails and slugs were collected and identified in the east of Tehran province which during it according to the availability, habitat diversity and geomorphological differences in more than 3251 samples from five microclimates were collected and identified. Specimens were gathered by hand, sweeping net and other techniques from aquatic plants, rotten underwood, shrubs and weeds, their geograical and regional properties were recorded and transfered to laboratory. Then through available morphological identification keys, specimens were identified as 19 species belonging to 13 genera and 10 families based on morphometric characteristics, including (shape and size of operculum, aperture, dextral or sinistral profile of their shell, pneumostome, keel, radula, renal ridge and reproduction system) and the comparison of photos and the identification key of these taxons were prepared and discussed:
Bithynia tentaculata (Linnaeus, 1758), Physella acuta (Draparnaud,1805), Lymnaea truncatula (Müller, 1774), , Lymnaea palusris (Müller, 1774) , Lymnaea pereger (Müller, 1774) , Lymnaea gedrosiana (Annandale and Prashad, 1919), Planorbis planorbis (Linnaeus, 1758), Gyraulus euphraticus(Mousson, 1874), Gyraulus convexiusculus (Hutton, 1849), Succinea putris (Linnaeus, 1758), Helicella krynickii (Krynicki, 1833), Helicella derbentina(Krynicki, 1836), Caucasotachea atrolabiata (Krynicki, 1833), * Monacha cartusiana (Müller, 1774), Oxychilus herzi (Boettger, 1889), Agriolimax agrestis=Deroceras reticulatum (Müller, 1774), *Theba pisana (Müller, 1774), Parmacella ibera Eichwald, 1841, Planorbis carinatus Müller, 1774.
Two species marked with an asterisk are new records for Iranian mollusc fauna. In this study, among the samples collected, the largest families in terms of species diversity are Planorbidae with four species (Planorbis planorbis, Gyraulus euphraticus, Gyraulus convexiusculus, Planorbis carinatus), Lymnaeidae with four species (Lymnaea truncatula, Lymnaea gedrosiana, Lymnaea palustris, Lymnaea pereger) and Helicidae with four species: Helicella krynickii, Helicella derbentina, Caucasotachea atrolabiata, Theba pisana. The highest and lowest species diversity among the identified species with 18 and 5 species are related to stations 4 and 5 of the investigated areas respectively. The whole collection will be kept permanently in the Zoology Museum of Iranian Research Institute of Plant Protection.

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