Invasive species are a major threat to global biodiversity. Therefore, it is crucial to monitor t... more Invasive species are a major threat to global biodiversity. Therefore, it is crucial to monitor their presence and expansion within invaded areas and carry out studies to improve our knowledge of their biology and ecology. One of the most effective and spectacular invaders among freshwater snails is the acute bladder snail (Physella acuta) (Draparnaud, 1805). This study aims to update the available data on P. acuta in Morocco and determine the main environmental factors that favor its distribution and expansion in this country. Field surveys were conducted in northern Morocco between 2014 and 2023, with a focus on protected areas such as Ramsar sites, and especially great geographical barriers such as the Middle Atlas Mountains and the Sebou and Moulouya River basins. The gastropods were collected using Surber samplers (20 × 25 cm surface area, 400 μm mesh), together with measurements of the physicochemical parameters of the water and other abiotic factors. The bladder snail is probably the most widespread freshwater snail in Morocco, where the species appears to be highly adaptable and can thrive in different habitats, including degraded ones, showing great plasticity in terms of the physicochemical parameters of the water. The main factor limiting the geographical distribution and abundance of P. acuta in the study area was water velocity and conductivity. However, further studies are required to address the future range of expansion of P. acuta in relation to climate change. Although one of the consequences of climate change is reduced water flow speed, which may promote its range of expansion in Morocco, salinization of streams may also reduce its ability to colonize new environments.
The scientific literature on molluscans taxonomy in Iran goes back to many years ago; however, in... more The scientific literature on molluscans taxonomy in Iran goes back to many years ago; however, in some parts of the country like southern areas, it is completely new. In addition, many of the studies have focused on their potential risk as intermediate hosts for parasites, ignoring their specific taxonomic identification or detailed ecology. In this research, molluscan fauna of Jubkhalle River, southern Iran was investigated in five stations during 2015 and 2016 within a span of 13 km. Four species from gastropods including Physa acuta, Planorbis intermixtus, Radix persica and Galba truncatula as well as a bivalve species Pisidium casertanum were identified. Among them, R. persica and P. casertanum were new records for the Fars Province. Our results showed consistencies between the number of species present and their environmental settings including total dissolved solids, electrical conductivity, and the water current velocity. Mean annual current velocity was lowest in station 2, ...
This article gives the first record of Pisidium globulare Clessin, 1873 (Mollusca: Bivalvia: Spha... more This article gives the first record of Pisidium globulare Clessin, 1873 (Mollusca: Bivalvia: Sphaeriidae) from Kosovo.
Invasive species are a major threat to global biodiversity. Therefore, it is crucial to monitor
t... more Invasive species are a major threat to global biodiversity. Therefore, it is crucial to monitor their presence and expansion within invaded areas and carry out studies to improve our knowledge of their biology and ecology. One of the most effective and spectacular invaders among freshwater snails is the acute bladder snail (Physella acuta) (Draparnaud, 1805). This study aims to update the available data on P. acuta in Morocco and determine the main environmental factors that favor its distribution and expansion in this country. Field surveys were conducted in northern Morocco between 2014 and 2023, with a focus on protected areas such as Ramsar sites, and especially great geographical barriers such as the Middle Atlas Mountains and the Sebou and Moulouya River basins. The gastropods were collected using Surber samplers (20 × 25 cm surface area, 400 μm mesh), together with measurements of the physicochemical parameters of the water and other abiotic factors. The bladder snail is probably the most widespread freshwater snail in Morocco, where the species appears to be highly adaptable and can thrive in different habitats, including degraded ones, showing great plasticity in terms of the physicochemical parameters of the water. The main factor limiting the geographical distribution and abundance of P. acuta in the study area was water velocity and conductivity. However, further studies are required to address the future range of expansion of P. acuta in relation to climate change. Although one of the consequences of climate change is reduced water flow speed, which may promote its range of expansion in Morocco, salinization of streams may also reduce its ability to colonize new environments.
Pseudamnicola thawintae sp. n. (Gastropoda, Hydrobiidae) is described from Ait-Bouaddou, Tizi-Ouz... more Pseudamnicola thawintae sp. n. (Gastropoda, Hydrobiidae) is described from Ait-Bouaddou, Tizi-Ouzou (Algeria) by the shells and the anatomy. In addition, photos of the shell and the penis morphology are given and photos of the type locality.
Sarkhia kermanshahensis ( Glöer & Pešić, 2009) comb. n. Fig. 12g Pseudamnicola kermanshahensis Gl... more Sarkhia kermanshahensis ( Glöer & Pešić, 2009) comb. n. Fig. 12g Pseudamnicola kermanshahensis Glöer & Pešić, 2009 (synonymy) New records. Markazi Province: IR51 [2 ex.]. Records from Iran. Kermanshah Province (as Pseudamnicola kermanshahensis Glöer and Pešić 2009). Remarks. This species has originally been placed in the genus Pseudamnicola. However, due to the characteristic shape of the penis and the tentacles it is transfered to Sarkhia gen. n. Distribution. Iran; Kermanshah and Markazi Provinces.
From Macedonia only Bithynia prespensis Hadžisce, 1963 is known so far. Recent investigations in ... more From Macedonia only Bithynia prespensis Hadžisce, 1963 is known so far. Recent investigations in Prespa Lake revealed a new Bithynia species, Bithynia shapkarevi n. sp. which is described here. Holotype and a paratype in addition to the penis morphology are depicted. The new Bithynia species has been compared with all known Bithynia spp. from the surrounding countries.
A new species of Valvata (Tropidina) is described from Armenia. It is similar to Valvata nowshahr... more A new species of Valvata (Tropidina) is described from Armenia. It is similar to Valvata nowshahrensis Glöer & Pešić 2012 from Iran and V. kebapcii Odabaşi, Glöer & Yıldırım 2015 from Turkey, but has a smaller shell with a narrower umbilicus. We provide data on the sampling site, photos of the new species in comparison with related species. Additionally, the taxonomy of Valvata brandti Westerlund, 1897 from Armenia is shortly discussed.
A new species of the genus Bythinella Moquin-Tandon, 1856 (Gastropoda: Risooidea: Bythinellidae),... more A new species of the genus Bythinella Moquin-Tandon, 1856 (Gastropoda: Risooidea: Bythinellidae), from a spring in Strandzha Mt, SE Bulgaria was described as new for science. By this there are 22 Bythinella species known from Bulgaria.
Two new stygobiont species of the family Hydrobiidae Troschel, 1857, i.e. Iverakia hausdorfi n. g... more Two new stygobiont species of the family Hydrobiidae Troschel, 1857, i.e. Iverakia hausdorfi n. gen. n. sp. and Bythiospeum demattiai n. sp. were described. The both species have been collected from the spring Iverak near Podgorica. Descriptions and photos of the holotypes are presented.
Aquatic snails of the genus Bythinella are among most abundant genera in springs of the Mediterra... more Aquatic snails of the genus Bythinella are among most abundant genera in springs of the Mediterranean region. In this paper we reported three species of the genus Bythinella from the springs on the island of Evia (Euboea, Euboia). Two species, i.e., Bythinella kastanolongosensis n. sp. and B. reuselaarsi n. sp. are described as new for science and photos of their shells and the penis are provided. New records are given for B. dimitrosensis Glöer & Reuselaars, 2020.
New samples of freshwater molluscs collected by the second author in the East Mediterranean regio... more New samples of freshwater molluscs collected by the second author in the East Mediterranean region of Turkey revealed three new species of the genus Pseudamnicola Paulucci, 1878, i.e., P. goksunensis n. sp., P. merali n. sp., and P. marashi n. sp. Descriptions and photos of the species as well as the type localities are presented.
Four species of the genus Pseudamnicola (Gastropoda: Hydrobiidae Stimpson, 1865), i.e. P. stasimo... more Four species of the genus Pseudamnicola (Gastropoda: Hydrobiidae Stimpson, 1865), i.e. P. stasimoensis n. sp., P. lesbosensis n. sp., P. samosensis n. sp. and P. skalaensis n. sp are described as new to science. The type localities of 13 Pseudamnicola spp. and 1 subspecies hitherto known from Greece, including the Greek part of Cyprus, are presented on a map.
Asia contains a high species diversity of the freshwater gastropod genusTheodoxus. Recent molecul... more Asia contains a high species diversity of the freshwater gastropod genusTheodoxus. Recent molecular and morphological reviews of this diversity have uncovered a number of yet undescribed species while suggesting the urgent revision of several others. Moreover, some of these studies have indicated a number of species previously not recorded for this continent. Despite the advancements, a taxonomic revision and an update on the distribution ofTheodoxusspp. in Asia is still pending. Here, we construct the most robust phylogeny ofTheodoxusup to now and review original descriptions, type material, recent taxonomic revisions, compendia, and species lists to provide a comprehensive checklist of all known extant AsianTheodoxusspp. Our checklist also provides descriptions for three recently discovered and yet undescribed species (Theodoxus gururSands & Glöer,sp. nov.,Theodoxus wesselinghiSands & Glöer,sp. nov., andTheodoxus wilkeiSands & Glöer,sp. nov.), as well as shows the need to synonymi...
During a field trip to the western part of the Balkan Peninsula in 2016, investigations of severa... more During a field trip to the western part of the Balkan Peninsula in 2016, investigations of several caves and karstic springs revealed six new gastropod species living in subterranean waters and resulted in some note-worthy faunistic records. Five of the new species are assigned to the genus Pavlović, 1913, namely , , , , and one to the genus Tomlin, 1930, namely New Albania and Kosovo distribution records are given for Schütt, 1975, Schütt, 1960, (Bole, 1961), and the first georeferenced record is given for Schütt, 1960. The most important environmental factors influencing habitat selection of these subterranean freshwater gastropods are briefly discussed.
Invasive species are a major threat to global biodiversity. Therefore, it is crucial to monitor t... more Invasive species are a major threat to global biodiversity. Therefore, it is crucial to monitor their presence and expansion within invaded areas and carry out studies to improve our knowledge of their biology and ecology. One of the most effective and spectacular invaders among freshwater snails is the acute bladder snail (Physella acuta) (Draparnaud, 1805). This study aims to update the available data on P. acuta in Morocco and determine the main environmental factors that favor its distribution and expansion in this country. Field surveys were conducted in northern Morocco between 2014 and 2023, with a focus on protected areas such as Ramsar sites, and especially great geographical barriers such as the Middle Atlas Mountains and the Sebou and Moulouya River basins. The gastropods were collected using Surber samplers (20 × 25 cm surface area, 400 μm mesh), together with measurements of the physicochemical parameters of the water and other abiotic factors. The bladder snail is probably the most widespread freshwater snail in Morocco, where the species appears to be highly adaptable and can thrive in different habitats, including degraded ones, showing great plasticity in terms of the physicochemical parameters of the water. The main factor limiting the geographical distribution and abundance of P. acuta in the study area was water velocity and conductivity. However, further studies are required to address the future range of expansion of P. acuta in relation to climate change. Although one of the consequences of climate change is reduced water flow speed, which may promote its range of expansion in Morocco, salinization of streams may also reduce its ability to colonize new environments.
The scientific literature on molluscans taxonomy in Iran goes back to many years ago; however, in... more The scientific literature on molluscans taxonomy in Iran goes back to many years ago; however, in some parts of the country like southern areas, it is completely new. In addition, many of the studies have focused on their potential risk as intermediate hosts for parasites, ignoring their specific taxonomic identification or detailed ecology. In this research, molluscan fauna of Jubkhalle River, southern Iran was investigated in five stations during 2015 and 2016 within a span of 13 km. Four species from gastropods including Physa acuta, Planorbis intermixtus, Radix persica and Galba truncatula as well as a bivalve species Pisidium casertanum were identified. Among them, R. persica and P. casertanum were new records for the Fars Province. Our results showed consistencies between the number of species present and their environmental settings including total dissolved solids, electrical conductivity, and the water current velocity. Mean annual current velocity was lowest in station 2, ...
This article gives the first record of Pisidium globulare Clessin, 1873 (Mollusca: Bivalvia: Spha... more This article gives the first record of Pisidium globulare Clessin, 1873 (Mollusca: Bivalvia: Sphaeriidae) from Kosovo.
Invasive species are a major threat to global biodiversity. Therefore, it is crucial to monitor
t... more Invasive species are a major threat to global biodiversity. Therefore, it is crucial to monitor their presence and expansion within invaded areas and carry out studies to improve our knowledge of their biology and ecology. One of the most effective and spectacular invaders among freshwater snails is the acute bladder snail (Physella acuta) (Draparnaud, 1805). This study aims to update the available data on P. acuta in Morocco and determine the main environmental factors that favor its distribution and expansion in this country. Field surveys were conducted in northern Morocco between 2014 and 2023, with a focus on protected areas such as Ramsar sites, and especially great geographical barriers such as the Middle Atlas Mountains and the Sebou and Moulouya River basins. The gastropods were collected using Surber samplers (20 × 25 cm surface area, 400 μm mesh), together with measurements of the physicochemical parameters of the water and other abiotic factors. The bladder snail is probably the most widespread freshwater snail in Morocco, where the species appears to be highly adaptable and can thrive in different habitats, including degraded ones, showing great plasticity in terms of the physicochemical parameters of the water. The main factor limiting the geographical distribution and abundance of P. acuta in the study area was water velocity and conductivity. However, further studies are required to address the future range of expansion of P. acuta in relation to climate change. Although one of the consequences of climate change is reduced water flow speed, which may promote its range of expansion in Morocco, salinization of streams may also reduce its ability to colonize new environments.
Pseudamnicola thawintae sp. n. (Gastropoda, Hydrobiidae) is described from Ait-Bouaddou, Tizi-Ouz... more Pseudamnicola thawintae sp. n. (Gastropoda, Hydrobiidae) is described from Ait-Bouaddou, Tizi-Ouzou (Algeria) by the shells and the anatomy. In addition, photos of the shell and the penis morphology are given and photos of the type locality.
Sarkhia kermanshahensis ( Glöer & Pešić, 2009) comb. n. Fig. 12g Pseudamnicola kermanshahensis Gl... more Sarkhia kermanshahensis ( Glöer & Pešić, 2009) comb. n. Fig. 12g Pseudamnicola kermanshahensis Glöer & Pešić, 2009 (synonymy) New records. Markazi Province: IR51 [2 ex.]. Records from Iran. Kermanshah Province (as Pseudamnicola kermanshahensis Glöer and Pešić 2009). Remarks. This species has originally been placed in the genus Pseudamnicola. However, due to the characteristic shape of the penis and the tentacles it is transfered to Sarkhia gen. n. Distribution. Iran; Kermanshah and Markazi Provinces.
From Macedonia only Bithynia prespensis Hadžisce, 1963 is known so far. Recent investigations in ... more From Macedonia only Bithynia prespensis Hadžisce, 1963 is known so far. Recent investigations in Prespa Lake revealed a new Bithynia species, Bithynia shapkarevi n. sp. which is described here. Holotype and a paratype in addition to the penis morphology are depicted. The new Bithynia species has been compared with all known Bithynia spp. from the surrounding countries.
A new species of Valvata (Tropidina) is described from Armenia. It is similar to Valvata nowshahr... more A new species of Valvata (Tropidina) is described from Armenia. It is similar to Valvata nowshahrensis Glöer & Pešić 2012 from Iran and V. kebapcii Odabaşi, Glöer & Yıldırım 2015 from Turkey, but has a smaller shell with a narrower umbilicus. We provide data on the sampling site, photos of the new species in comparison with related species. Additionally, the taxonomy of Valvata brandti Westerlund, 1897 from Armenia is shortly discussed.
A new species of the genus Bythinella Moquin-Tandon, 1856 (Gastropoda: Risooidea: Bythinellidae),... more A new species of the genus Bythinella Moquin-Tandon, 1856 (Gastropoda: Risooidea: Bythinellidae), from a spring in Strandzha Mt, SE Bulgaria was described as new for science. By this there are 22 Bythinella species known from Bulgaria.
Two new stygobiont species of the family Hydrobiidae Troschel, 1857, i.e. Iverakia hausdorfi n. g... more Two new stygobiont species of the family Hydrobiidae Troschel, 1857, i.e. Iverakia hausdorfi n. gen. n. sp. and Bythiospeum demattiai n. sp. were described. The both species have been collected from the spring Iverak near Podgorica. Descriptions and photos of the holotypes are presented.
Aquatic snails of the genus Bythinella are among most abundant genera in springs of the Mediterra... more Aquatic snails of the genus Bythinella are among most abundant genera in springs of the Mediterranean region. In this paper we reported three species of the genus Bythinella from the springs on the island of Evia (Euboea, Euboia). Two species, i.e., Bythinella kastanolongosensis n. sp. and B. reuselaarsi n. sp. are described as new for science and photos of their shells and the penis are provided. New records are given for B. dimitrosensis Glöer & Reuselaars, 2020.
New samples of freshwater molluscs collected by the second author in the East Mediterranean regio... more New samples of freshwater molluscs collected by the second author in the East Mediterranean region of Turkey revealed three new species of the genus Pseudamnicola Paulucci, 1878, i.e., P. goksunensis n. sp., P. merali n. sp., and P. marashi n. sp. Descriptions and photos of the species as well as the type localities are presented.
Four species of the genus Pseudamnicola (Gastropoda: Hydrobiidae Stimpson, 1865), i.e. P. stasimo... more Four species of the genus Pseudamnicola (Gastropoda: Hydrobiidae Stimpson, 1865), i.e. P. stasimoensis n. sp., P. lesbosensis n. sp., P. samosensis n. sp. and P. skalaensis n. sp are described as new to science. The type localities of 13 Pseudamnicola spp. and 1 subspecies hitherto known from Greece, including the Greek part of Cyprus, are presented on a map.
Asia contains a high species diversity of the freshwater gastropod genusTheodoxus. Recent molecul... more Asia contains a high species diversity of the freshwater gastropod genusTheodoxus. Recent molecular and morphological reviews of this diversity have uncovered a number of yet undescribed species while suggesting the urgent revision of several others. Moreover, some of these studies have indicated a number of species previously not recorded for this continent. Despite the advancements, a taxonomic revision and an update on the distribution ofTheodoxusspp. in Asia is still pending. Here, we construct the most robust phylogeny ofTheodoxusup to now and review original descriptions, type material, recent taxonomic revisions, compendia, and species lists to provide a comprehensive checklist of all known extant AsianTheodoxusspp. Our checklist also provides descriptions for three recently discovered and yet undescribed species (Theodoxus gururSands & Glöer,sp. nov.,Theodoxus wesselinghiSands & Glöer,sp. nov., andTheodoxus wilkeiSands & Glöer,sp. nov.), as well as shows the need to synonymi...
During a field trip to the western part of the Balkan Peninsula in 2016, investigations of severa... more During a field trip to the western part of the Balkan Peninsula in 2016, investigations of several caves and karstic springs revealed six new gastropod species living in subterranean waters and resulted in some note-worthy faunistic records. Five of the new species are assigned to the genus Pavlović, 1913, namely , , , , and one to the genus Tomlin, 1930, namely New Albania and Kosovo distribution records are given for Schütt, 1975, Schütt, 1960, (Bole, 1961), and the first georeferenced record is given for Schütt, 1960. The most important environmental factors influencing habitat selection of these subterranean freshwater gastropods are briefly discussed.
Basis of the species considered in these
books are the lists of the Fauna Europaea
project, publi... more Basis of the species considered in these books are the lists of the Fauna Europaea project, published by Ruud Bank (2004, 2011a, 2011b) as well as Bank & Neubert (2018) with additions of species which have been described until 2021 and VINARSKI & KANTOR (2018) for Russia. These check-lists have been expanded by species living outside Europe. Altogether more than 1.700 species are described and depicted.
The FReshwater Gastropods of the West-Palaearctis, 2019
This is the first identification key for the freshwater gastropods of the West
Palaearctis of whi... more This is the first identification key for the freshwater gastropods of the West Palaearctis of which the progress of malacological research of the last decades has been considered. Nearly all species have been depicted by high quality photos and in a way that species identification is possible. Additional descriptions and identification keys, which refer to the typical characters of the species, support the depictions. For most species photos of the anatomy are provided. Altogether there are 424 photo-plates with more than 1,600 professional individual photos. Basis of the species considered in this book are the lists of the Fauna Europaea project, published by Ruud Bank (2004, 2011a, 2011b) as well as Bank & Neubert (2018) with additions of species which have been described after 2011 and VINARSKI & KANTOR (2018) for European Russia. This check-list has been expanded by species living outside Europe. The borders of the West-Palaearctis are Iceland in the north, the Ural, along the Caspian Sea to Iran in the east, the Near East and Northern Africa to Portugal in the west. In addition species names in doubt have been compared with WORMS (World Register Of Marine Species, http://www.marinespecies.org).
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Papers by Peter Gloeer
their presence and expansion within invaded areas and carry out studies to improve our knowledge
of their biology and ecology. One of the most effective and spectacular invaders among freshwater
snails is the acute bladder snail (Physella acuta) (Draparnaud, 1805). This study aims to update the
available data on P. acuta in Morocco and determine the main environmental factors that favor its
distribution and expansion in this country. Field surveys were conducted in northern Morocco
between 2014 and 2023, with a focus on protected areas such as Ramsar sites, and especially great
geographical barriers such as the Middle Atlas Mountains and the Sebou and Moulouya River basins.
The gastropods were collected using Surber samplers (20 × 25 cm surface area, 400 μm mesh),
together with measurements of the physicochemical parameters of the water and other abiotic factors.
The bladder snail is probably the most widespread freshwater snail in Morocco, where the species
appears to be highly adaptable and can thrive in different habitats, including degraded ones, showing
great plasticity in terms of the physicochemical parameters of the water. The main factor limiting
the geographical distribution and abundance of P. acuta in the study area was water velocity and
conductivity. However, further studies are required to address the future range of expansion of P.
acuta in relation to climate change. Although one of the consequences of climate change is reduced
water flow speed, which may promote its range of expansion in Morocco, salinization of streams may
also reduce its ability to colonize new environments.
their presence and expansion within invaded areas and carry out studies to improve our knowledge
of their biology and ecology. One of the most effective and spectacular invaders among freshwater
snails is the acute bladder snail (Physella acuta) (Draparnaud, 1805). This study aims to update the
available data on P. acuta in Morocco and determine the main environmental factors that favor its
distribution and expansion in this country. Field surveys were conducted in northern Morocco
between 2014 and 2023, with a focus on protected areas such as Ramsar sites, and especially great
geographical barriers such as the Middle Atlas Mountains and the Sebou and Moulouya River basins.
The gastropods were collected using Surber samplers (20 × 25 cm surface area, 400 μm mesh),
together with measurements of the physicochemical parameters of the water and other abiotic factors.
The bladder snail is probably the most widespread freshwater snail in Morocco, where the species
appears to be highly adaptable and can thrive in different habitats, including degraded ones, showing
great plasticity in terms of the physicochemical parameters of the water. The main factor limiting
the geographical distribution and abundance of P. acuta in the study area was water velocity and
conductivity. However, further studies are required to address the future range of expansion of P.
acuta in relation to climate change. Although one of the consequences of climate change is reduced
water flow speed, which may promote its range of expansion in Morocco, salinization of streams may
also reduce its ability to colonize new environments.
books are the lists of the Fauna Europaea
project, published by Ruud Bank (2004,
2011a, 2011b) as well as Bank & Neubert
(2018) with additions of species which have
been described until 2021 and VINARSKI &
KANTOR (2018) for Russia. These check-lists
have been expanded by species living outside
Europe. Altogether more than 1.700
species are described and depicted.
Palaearctis of which the progress of malacological research of the last decades
has been considered. Nearly all species have been depicted by high quality photos
and in a way that species identification is possible. Additional descriptions
and identification keys, which refer to the typical characters of the species, support
the depictions. For most species photos of the anatomy are provided. Altogether
there are 424 photo-plates with more than 1,600 professional individual
photos.
Basis of the species considered in this book are the lists of the Fauna Europaea
project, published by Ruud Bank (2004, 2011a, 2011b) as well as Bank & Neubert
(2018) with additions of species which have been described after 2011 and
VINARSKI & KANTOR (2018) for European Russia. This check-list has been
expanded by species living outside Europe. The borders of the West-Palaearctis
are Iceland in the north, the Ural, along the Caspian Sea to Iran in the east, the
Near East and Northern Africa to Portugal in the west. In addition species names
in doubt have been compared with WORMS (World Register Of Marine Species,
http://www.marinespecies.org).