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Zhonge Hou - One of the best experts on this subject based on the ideXlab platform.
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Sarothrogammarus yiiruae, a new species of Amphipoda (Gammaridae) from China
ZooKeys, 2019Co-Authors: Ya-mi Zheng, Zhonge HouAbstract:A relic amphipod of the Tethys, Sarothrogammarusyiiruaesp. nov., is described from Xinjiang, China. The new species is characterized by the absence of eyes; having the palm of the propodus without a mid-palmar spine on gnathopods I-II; a weakly concave coxal plate IV; narrow bases of pereopods V-VII; a peduncle of uropod I without a basofacial spine; uropod III longer than uropods I-II, a scale-like inner ramus, and a biarticulate outer ramus with distinct second article. Detailed morphological comparisons with related species are discussed. Genetic distances of the new and related species are provided as proof of species identification.
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Three new remarkable amphipod species (Crustacea: Gammaridae) from springs and subterranean waters of Central Asia.
Zootaxa, 2018Co-Authors: Dmitry A. Sidorov, Zhonge Hou, Boris SketAbstract:Three new species of the family Gammaridae-Gammarus troglomorphus, sp. n., G. parvioculatus, sp. n. from Lebap Province of Turkmenistan and Tadzocrangonyx alaicus, sp. n. from Batken Region of Kyrgyzstan are described and illustrated. Morphological studies of a closely related Turkmenistan population of G. cf. subaequalis-Garlyk, probably conspecific with Gammarus subaequalis Martynov, 1935 was provided. The affinity of new species to concerned taxa is discussed. To define phylogenetic position of mentioned species DNA barcode data are obtained. Gammarus troglomorphus and G. parvioculatus are close neighbors but exceedingly different morphologically. Gammarus troglomorphus is a troglobiont; G. parvioculatus is an eutroglophile, but with exception of slightly smaller eyes, not troglomorph. Both found only within small areas in the extreme East of Turkmenistan. Gammarus cf. subaequalis-Garlyk seems to extend from the same region far into the eastern Kyrgyzstan.
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A NEW CAVE AMPHIPOD OF THE GENUS SINOGAMMARUS
2016Co-Authors: Zhonge HouAbstract:The present paper deals with a new species of the family Gammaridae (Amphipoda) from the southwest of China, Sinogammarus chuanhui. A detailed description of this freshwater amphipod is given and differences with related species are discussed.
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A review of Gammaridae (Crustacea: Amphipoda): the family extent, its evolutionary history, and taxonomic redefinition of genera
Zoological Journal of the Linnean Society, 2015Co-Authors: Zhonge Hou, Boris SketAbstract:By molecular analysis of a high number of gammarids, including 29 out-group genera, we could assure the monophyly of Gammaridae. To avoid the paraphyly of the family, we propose the omission of PontoGammaridae, TyphloGammaridae, and all Baikalian families. Similarly, the genera Fontogammarus, Sinogammarus, Lagunogammarus, Pephredo, Neogammarus, and Laurogammarus may be cancelled. But, tens of Baikal genera, nested within Gammarus, are so diverse that they must be retained, although rendering Gammarus paraphyletic. Besides we propose the polyphyletic Echinogammarus–Chaetogammarus group to be divided into monophyletic genera Echinogammarus s. str., Homoeogammarus, Parhomoeogammarus, Marinogammarus, Relictogammarus gen. nov., Chaetogammarus, and Trichogammarus gen. nov. These solutions made it possible to complete the first analysis of the family evolution in light of its phylogeny. Perimarine clades are mainly basally split clades, whereas in some ancient lakes extremely rich endemic faunas had developed polyphyletically. The troglobiotic Typhlogammarus group from Dinarides and Caucasus formed a monophylum, whereas the troglobiotic assemblage of Gammarus species is highly polyphyletic. Reduction of the uropod III endopodite, which classically distinguishes between the genera Gammarus and Echinogammarus, appeared to be highly polyphyletic. Protective dorsal pleonal projections occur scattered across the family and beyond, whereas lateral projections were limited to species of ancient lakes, so both structures were polyphyletic. The evolutionary history of Gammaridae was investigated with ten different calibration schemes, which produced incompatible results; however, the most probable scenario is a late rise of the family, which can only explain the absence of Gammaridae species around the Indo-Pacific. © 2015 The Linnean Society of London
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Phylogenetic analyses of Gammaridae crustacean reveal different diversification patterns among sister lineages in the Tethyan region
Cladistics, 2013Co-Authors: Zhonge Hou, Boris SketAbstract:The Gammaridae shows the greatest disparity in species diversity and distribution pattern in the Amphipoda, with some genera ranging from the Palearctic to Nearctic, while others are limited to the Mediterranean region or ancient Tethyan margins. Here we present the first molecular phylogenetic analysis of the Gammaridae to investigate its evolutionary history using four genetic markers and a comprehensive set of taxa representing 198 species. The phylogenetic results revealed that the Gammaridae originated from the Tethyan region in the Cretaceous, and split into three morphologically and geographically distinct lineages by the end of the Paleocene. Diversification analysis combined with paleogeological evidence suggested that the Tethyan changes induced by sea-level fluctuation and tectonic uplift triggered different diversification modes and range expansions for the three lineages. The Gammarus lineage underwent an early rapid radiation across Eurasia and North America, then declined towards modern species. Pontogammarids maintained stable diversification with restricted distributions around the Tethyan basin, whereas sarothrogammarids experienced evolutionary stasis by stranding on the ancient Tethyan margins. Our findings suggest that environmental changes have played an important role in the diversification of Gammaridae lineages, which could be an opportunity to promote adaptive radiations in new habitats, or constraints resulting in evolutionary relicts.
Nurcan Özkan - One of the best experts on this subject based on the ideXlab platform.
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Amphipoda (Crustacea: Malacostraca) fauna of the inland-waters of Gökçeada Island
Ege Journal of Fisheries and Aquatic Sciences, 2017Co-Authors: Murat Ozbek, Nurcan ÖzkanAbstract:Ege Denizi’nin onemli adalarindan olan Gokceada ic sularinda dagilim gosteren Amphipod turlerinin tespit edilmesi amaciyla, farkli tarihlerde adadaki 17 lokaliteden toplanmis olan ornekler incelenmistir. Ornekler 500 µm goz acikligindaki el kepceleri ile toplanmis olup, sahada %4’luk formaldehit solusyonu icinde fikse edilmislerdir. Calisma sonucunda, ornekleme yapilan istasyonlarda Gammaridae ve Talitridae familyalarina ait toplam 3 turun [Gammarus komareki Schaferna 1922, Gammarus aequicauda (Martynov, 1931) ve Orchestia mediterranea Costa, 1853] dagilim gosterdigi tespit edilmistir. Tespit edilen turler Gokceada’dan ilk defa kayit edilmektedir.
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Gökçeada içsularının amphipoda (Crustacea: Malacostraca) faunası
Ege University, 2017Co-Authors: Murat Ozbek, Nurcan ÖzkanAbstract:Ege Denizi’nin önemli adalarından olan Gökçeada iç sularında dağılım gösteren Amphipod türlerinin tespit edilmesi amacıyla, farklı tarihlerde adadaki 17 lokaliteden toplanmış olan örnekler incelenmiştir. Örnekler 500 µm göz açıklığındaki el kepçeleri ile toplanmış olup, sahada %4’lük formaldehit solüsyonu içinde fikse edilmişlerdir. Çalışma sonucunda, örnekleme yapılan istasyonlarda Gammaridae ve Talitridae familyalarına ait toplam 3 türün [Gammarus komareki Schäferna 1922, Gammarus aequicauda (Martynov, 1931) ve Orchestia mediterranea Costa, 1853] dağılım gösterdiği tespit edilmiştir. Tespit edilen türler Gökçeada’dan ilk defa kayıt edilmektedir
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marmara ve pasalimani adalari ile kapidag yarimadasi icsularinin Gammaridae amphipoda faunasi
Ege Journal of Fisheries and Aquatic Sciences, 2015Co-Authors: Murat Ozbek, Hasan H Ozturk, Nurcan ÖzkanAbstract:Marmara Denizi’nin onemli adalarindan olan Marmara ve Pasalimani adalari ile Kapidag Yarimadasi icsularinda dagilim gosteren Gammaridae turlerinin tespit edilmesi amaciyla, 24-28 Agustos 2010 tarihleri arasinda 21 farkli istasyondan orneklemeler yapilmistir. Yapilan calismalar sonucunda, ornekleme yapilan istasyonlarda Gammaridae familyasinin Gammarus genusuna ait toplam 3 taksonun [ Gammarus pulex pulex (Linnaeus, 1758), Gammarus uludagi Karaman, 1975, Gammarus aequicauda (Martynov, 1931)] dagilim gosterdigi tespit edilmistir. Tespit edilen taksonlarin tumu ulkemizden daha onceden kayit edilmis olan turlerdir.
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marmara ve pasalimani adalari ile kapidag yarimadasi icsularinin Gammaridae amphipoda faunasi Gammaridae amphipoda fauna of the inland waters of marmara and pasalimani islands and kapidag peninsula
2015Co-Authors: Murat Ozbek, Hasan H Ozturk, Nurcan ÖzkanAbstract:In order to determine the freshwater Gammaridae fauna of the Marmara and Pasalimani islands which are among the main islands of Sea of Marmara, and Kapidag Peninsula, samplings were carried out at 21 different localities between 24 and 28 August 2010. As a result, three species belonging to Gammaridae (Gammarus pulex pulex (Linnaeus, 1758), Gammarus uludagi Karaman, 1975, Gammarus aequicauda (Martynov, 1931)) were determined. All of the determined species were previously recorded from Turkey.
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Chironomidae (Diptera) and Gammaridae (Amphipoda) Fauna in Dupnisa Cave (Sarpdere Village, Demirköy, Kırklareli).
2009Co-Authors: Nurcan ÖzkanAbstract:Dupnisa Magarasi’nin (Sarpdere Koyu, Demirkoy, Kirklareli) Chironomidae (Diptera) ve Gammaridae (Amphipoda) Faunasi. Dupnisa Magarasina 20.08.2001 ve 06.07.2004 tarihlerinde 2 arazi calismasi gerceklestirildi. 4 ornekleme lokalitesinden Chironomidae (Diptera) ve Gammaridae (Amphipoda) familyalarina ait ornekler toplandi. Daha sonra laboratuvarda mikroskop altinda teshisleri gerceklestirildi. 1 nolu lokalitede Chironomidae familyasina ait larva bulunmadi. 2 nolu lokalitede Paratrissocladius excerptus (Walker, 1806); Epoicocladius ephemerae (Kieffer, 1924); Polypedilum (Tripodura) scalaenum (Schrank, 1803), 3 nolu lokalitede Macropelopia nebulosa (Meigen, 1804); Telmatopelopia nemorum Goetghebuer, 1921; Paratrichocladius rufiventris (Meigen, 1830); Rheotanytarsus sp.; Micropsectra praecox Wiedemann, 1918 ve 4 nolu lokalitede Heleniella orniaticollis Edwards, 1929; Chaetocladius piger Goetghebuer, 1913; Psectrocladius barbimans Edwards, 1929; Polypedilum (Tripodura) scalaenum (Schrank, 1803); Micropsectra praecox Wiedemann, 1918 turleri bulundu. Gammaridae familyasindan ise 4 ornekleme lokalitesinin herbirinde yalniz Gammarus arduus G.S. Karaman, 1973 turu saptandi
Boris Sket - One of the best experts on this subject based on the ideXlab platform.
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Three new remarkable amphipod species (Crustacea: Gammaridae) from springs and subterranean waters of Central Asia.
Zootaxa, 2018Co-Authors: Dmitry A. Sidorov, Zhonge Hou, Boris SketAbstract:Three new species of the family Gammaridae-Gammarus troglomorphus, sp. n., G. parvioculatus, sp. n. from Lebap Province of Turkmenistan and Tadzocrangonyx alaicus, sp. n. from Batken Region of Kyrgyzstan are described and illustrated. Morphological studies of a closely related Turkmenistan population of G. cf. subaequalis-Garlyk, probably conspecific with Gammarus subaequalis Martynov, 1935 was provided. The affinity of new species to concerned taxa is discussed. To define phylogenetic position of mentioned species DNA barcode data are obtained. Gammarus troglomorphus and G. parvioculatus are close neighbors but exceedingly different morphologically. Gammarus troglomorphus is a troglobiont; G. parvioculatus is an eutroglophile, but with exception of slightly smaller eyes, not troglomorph. Both found only within small areas in the extreme East of Turkmenistan. Gammarus cf. subaequalis-Garlyk seems to extend from the same region far into the eastern Kyrgyzstan.
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A review of Gammaridae (Crustacea: Amphipoda): the family extent, its evolutionary history, and taxonomic redefinition of genera
Zoological Journal of the Linnean Society, 2015Co-Authors: Zhonge Hou, Boris SketAbstract:By molecular analysis of a high number of gammarids, including 29 out-group genera, we could assure the monophyly of Gammaridae. To avoid the paraphyly of the family, we propose the omission of PontoGammaridae, TyphloGammaridae, and all Baikalian families. Similarly, the genera Fontogammarus, Sinogammarus, Lagunogammarus, Pephredo, Neogammarus, and Laurogammarus may be cancelled. But, tens of Baikal genera, nested within Gammarus, are so diverse that they must be retained, although rendering Gammarus paraphyletic. Besides we propose the polyphyletic Echinogammarus–Chaetogammarus group to be divided into monophyletic genera Echinogammarus s. str., Homoeogammarus, Parhomoeogammarus, Marinogammarus, Relictogammarus gen. nov., Chaetogammarus, and Trichogammarus gen. nov. These solutions made it possible to complete the first analysis of the family evolution in light of its phylogeny. Perimarine clades are mainly basally split clades, whereas in some ancient lakes extremely rich endemic faunas had developed polyphyletically. The troglobiotic Typhlogammarus group from Dinarides and Caucasus formed a monophylum, whereas the troglobiotic assemblage of Gammarus species is highly polyphyletic. Reduction of the uropod III endopodite, which classically distinguishes between the genera Gammarus and Echinogammarus, appeared to be highly polyphyletic. Protective dorsal pleonal projections occur scattered across the family and beyond, whereas lateral projections were limited to species of ancient lakes, so both structures were polyphyletic. The evolutionary history of Gammaridae was investigated with ten different calibration schemes, which produced incompatible results; however, the most probable scenario is a late rise of the family, which can only explain the absence of Gammaridae species around the Indo-Pacific. © 2015 The Linnean Society of London
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Phylogenetic analyses of Gammaridae crustacean reveal different diversification patterns among sister lineages in the Tethyan region
Cladistics, 2013Co-Authors: Zhonge Hou, Boris SketAbstract:The Gammaridae shows the greatest disparity in species diversity and distribution pattern in the Amphipoda, with some genera ranging from the Palearctic to Nearctic, while others are limited to the Mediterranean region or ancient Tethyan margins. Here we present the first molecular phylogenetic analysis of the Gammaridae to investigate its evolutionary history using four genetic markers and a comprehensive set of taxa representing 198 species. The phylogenetic results revealed that the Gammaridae originated from the Tethyan region in the Cretaceous, and split into three morphologically and geographically distinct lineages by the end of the Paleocene. Diversification analysis combined with paleogeological evidence suggested that the Tethyan changes induced by sea-level fluctuation and tectonic uplift triggered different diversification modes and range expansions for the three lineages. The Gammarus lineage underwent an early rapid radiation across Eurasia and North America, then declined towards modern species. Pontogammarids maintained stable diversification with restricted distributions around the Tethyan basin, whereas sarothrogammarids experienced evolutionary stasis by stranding on the ancient Tethyan margins. Our findings suggest that environmental changes have played an important role in the diversification of Gammaridae lineages, which could be an opportunity to promote adaptive radiations in new habitats, or constraints resulting in evolutionary relicts.
Murat Ozbek - One of the best experts on this subject based on the ideXlab platform.
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Amphipoda (Crustacea: Malacostraca) fauna of the inland-waters of Gökçeada Island
Ege Journal of Fisheries and Aquatic Sciences, 2017Co-Authors: Murat Ozbek, Nurcan ÖzkanAbstract:Ege Denizi’nin onemli adalarindan olan Gokceada ic sularinda dagilim gosteren Amphipod turlerinin tespit edilmesi amaciyla, farkli tarihlerde adadaki 17 lokaliteden toplanmis olan ornekler incelenmistir. Ornekler 500 µm goz acikligindaki el kepceleri ile toplanmis olup, sahada %4’luk formaldehit solusyonu icinde fikse edilmislerdir. Calisma sonucunda, ornekleme yapilan istasyonlarda Gammaridae ve Talitridae familyalarina ait toplam 3 turun [Gammarus komareki Schaferna 1922, Gammarus aequicauda (Martynov, 1931) ve Orchestia mediterranea Costa, 1853] dagilim gosterdigi tespit edilmistir. Tespit edilen turler Gokceada’dan ilk defa kayit edilmektedir.
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Gökçeada içsularının amphipoda (Crustacea: Malacostraca) faunası
Ege University, 2017Co-Authors: Murat Ozbek, Nurcan ÖzkanAbstract:Ege Denizi’nin önemli adalarından olan Gökçeada iç sularında dağılım gösteren Amphipod türlerinin tespit edilmesi amacıyla, farklı tarihlerde adadaki 17 lokaliteden toplanmış olan örnekler incelenmiştir. Örnekler 500 µm göz açıklığındaki el kepçeleri ile toplanmış olup, sahada %4’lük formaldehit solüsyonu içinde fikse edilmişlerdir. Çalışma sonucunda, örnekleme yapılan istasyonlarda Gammaridae ve Talitridae familyalarına ait toplam 3 türün [Gammarus komareki Schäferna 1922, Gammarus aequicauda (Martynov, 1931) ve Orchestia mediterranea Costa, 1853] dağılım gösterdiği tespit edilmiştir. Tespit edilen türler Gökçeada’dan ilk defa kayıt edilmektedir
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marmara ve pasalimani adalari ile kapidag yarimadasi icsularinin Gammaridae amphipoda faunasi
Ege Journal of Fisheries and Aquatic Sciences, 2015Co-Authors: Murat Ozbek, Hasan H Ozturk, Nurcan ÖzkanAbstract:Marmara Denizi’nin onemli adalarindan olan Marmara ve Pasalimani adalari ile Kapidag Yarimadasi icsularinda dagilim gosteren Gammaridae turlerinin tespit edilmesi amaciyla, 24-28 Agustos 2010 tarihleri arasinda 21 farkli istasyondan orneklemeler yapilmistir. Yapilan calismalar sonucunda, ornekleme yapilan istasyonlarda Gammaridae familyasinin Gammarus genusuna ait toplam 3 taksonun [ Gammarus pulex pulex (Linnaeus, 1758), Gammarus uludagi Karaman, 1975, Gammarus aequicauda (Martynov, 1931)] dagilim gosterdigi tespit edilmistir. Tespit edilen taksonlarin tumu ulkemizden daha onceden kayit edilmis olan turlerdir.
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marmara ve pasalimani adalari ile kapidag yarimadasi icsularinin Gammaridae amphipoda faunasi Gammaridae amphipoda fauna of the inland waters of marmara and pasalimani islands and kapidag peninsula
2015Co-Authors: Murat Ozbek, Hasan H Ozturk, Nurcan ÖzkanAbstract:In order to determine the freshwater Gammaridae fauna of the Marmara and Pasalimani islands which are among the main islands of Sea of Marmara, and Kapidag Peninsula, samplings were carried out at 21 different localities between 24 and 28 August 2010. As a result, three species belonging to Gammaridae (Gammarus pulex pulex (Linnaeus, 1758), Gammarus uludagi Karaman, 1975, Gammarus aequicauda (Martynov, 1931)) were determined. All of the determined species were previously recorded from Turkey.
Mozafar Sharifi - One of the best experts on this subject based on the ideXlab platform.
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Food habit of the endangered yellow-spotted newt Neurergus microspilotus (Caudata, Salamandridae) in Kavat Stream, western Iran
Zoological Studies, 2014Co-Authors: Hossein Farasat, Mozafar SharifiAbstract:Background Diversity and abundance of macroinvertebrate fauna were simultaneously determined in selected benthic samples and in regurgitated stomach contents in Neurergus microspilotus in Kavat Stream (western Iran) during April and May 2012. The aim of this study was to determine the degree of reliance of this species to benthic macroinvertebrates during their reproductive season in aquatic habitat. Results Twenty-one taxa of macroinvertebrates were identified in the benthic samples while 19 taxa were presented in the regurgitated stomach contents. Data obtained from benthic samples showed that the most abundant macroinvertebrate groups included Lumbricidae (27.2%), Mycetophilidae (20.06%), Gammaridae (12.19%), and Plananariidae (9.3%). Data obtained from 45 stomach contents indicated that on average the highest importance values combining number, frequency, and volume for prey categories consumed included Mycetophilidae (14.03%), Baetidae (13.68%), Corbiculidae (12.57%), Gammaridae (10.8%), and Lumbricidae (9.34%). N. microspilotus also consumed small stones, plant materials, and their own eggs (0.91%). The analysis of selectivity in feeding using Ivlev’s index showed that the prey taxa that appeared to be preferred ( E _ i > 0.5) were generally rare in the environment. Conclusions Comparison between benthic macroinvertebrates and those taken by the newt demonstrates that although high similarity (Sorenson index of 78.94%) exists between the two communities, the dominance of the items taken by N. microspilotus (Simpson index = 0.32) is higher than that of the benthic community (Simpson index = 0.20) indicating that the newts rely on fewer number of species with higher proportion of individual prey items. Feeding habits of 45 N. microspilotus have shown that the newts rely extensively on Mycetophilidae, Baetidae, Corbiculidae, Gammaridae, and Lumbricidae as important food items for N. microspilotus .
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Food habit of the endangered yellow-spotted newt Neurergus microspilotus (Caudata, Salamandridae) in Kavat Stream, western Iran
Zoological Studies, 2014Co-Authors: Hossein Farasat, Mozafar SharifiAbstract:Diversity and abundance of macroinvertebrate fauna were simultaneously determined in selected benthic samples and in regurgitated stomach contents in Neurergus microspilotus in Kavat Stream (western Iran) during April and May 2012. The aim of this study was to determine the degree of reliance of this species to benthic macroinvertebrates during their reproductive season in aquatic habitat. Twenty-one taxa of macroinvertebrates were identified in the benthic samples while 19 taxa were presented in the regurgitated stomach contents. Data obtained from benthic samples showed that the most abundant macroinvertebrate groups included Lumbricidae (27.2%), Mycetophilidae (20.06%), Gammaridae (12.19%), and Plananariidae (9.3%). Data obtained from 45 stomach contents indicated that on average the highest importance values combining number, frequency, and volume for prey categories consumed included Mycetophilidae (14.03%), Baetidae (13.68%), Corbiculidae (12.57%), Gammaridae (10.8%), and Lumbricidae (9.34%). N. microspilotus also consumed small stones, plant materials, and their own eggs (0.91%). The analysis of selectivity in feeding using Ivlev’s index showed that the prey taxa that appeared to be preferred (E i > 0.5) were generally rare in the environment. Comparison between benthic macroinvertebrates and those taken by the newt demonstrates that although high similarity (Sorenson index of 78.94%) exists between the two communities, the dominance of the items taken by N. microspilotus (Simpson index = 0.32) is higher than that of the benthic community (Simpson index = 0.20) indicating that the newts rely on fewer number of species with higher proportion of individual prey items. Feeding habits of 45 N. microspilotus have shown that the newts rely extensively on Mycetophilidae, Baetidae, Corbiculidae, Gammaridae, and Lumbricidae as important food items for N. microspilotus.
