Browsing by Author "Koç, H"

Now showing 1 - 8 of 8
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    A new species of Zachaeus CL Koch from Turkey (Opiliones, Phalangiidae)
    Kurt, K; Koç, H; Yagmur, EA
    A new species of harvestmen, Zachaeus seyyari sp. n. (Opiliones, Phalangiidae), is described and illustrated on the basis of both sexes from Sirnak Province in Turkey. Differences between the new species and related species are indicated. Photographs of its characteristic structures are also provided.
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    THE TYPE LOCALITY OF RHAGODES CAUCASICUS BIRULA, 1905, AND THE FIRST RECORD OF THE SPECIES FROM IRAN WITH REDESCRIPTION OF THE SPECIES FROM TURKEY (SOLIFUGAE: RHAGODIDAE)
    Koç, H; Moradi, M; Erdek, M; Yagmur, EA; Gharahkloo, PM
    The type locality of Rhagodes caucasicus Birula, 1905 is corrected and identified as Tuzluca (Kul'p), Igdir Province, eastern Turkey instead of Armenia. A new record for the Iranian solpugid fauna is also reported: Rhagodes caucasicus Birula, 1905 from Zanjan Province, northwestern Iran. The redescription of new material of Rhagodes caucasicus from Turkey is included.
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    Genetic diversity within Scorpio maurus (Scorpiones: Scorpionidae) from Turkey
    Koç, H; Sipahi, H; Yagmur, EA
    In this study, DNA sequence diversity of the mitochondrial (mt) cytochrome oxidase 1 (CO1) gene was investigated in Scorpio maurus specimens from across southeastern Turkey. Nucleotide sequences included 508 conserved sites and 126 variable sites, and the mean nucleotide variation within species was 7.9%. Intraspecific pairwise divergences ranged from 0.5% to 10.7%. Phylogenetic analysis indicated high divergence among specimens. This study is the first mtDNA sequence analysis for Turkish scorpions.
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    A new species of Euscorpius Thorell, 1876 (Scorpiones, Euscorpiidae) from Turkey
    Tropea, G; Yagmur, EA; Koç, H; Yesilyurt, F; Rossi, A
    A new species of the genus Euscorpius Thorell, 1876 is described based on specimens collected from Dilek Peninsula (Davutlar, Aydin) in Turkey. It is characterized by an oligotrichous trichobothrial pattern (Pv= 7, et= 5/6, eb= 4) and small size. Euscorpius (Euscorpius) avcii sp. n. is the first named species of the subgenus Euscorpius from Turkey.
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    TWO NEW RECORDS FOR TURKISH HARVESTMEN FAUNA (ARACHNIDA: OPILIONES)
    Kurt, K; Koç, H; Yagmur, EA
    Two harvestmen species, Mediostoma haasi (Roewer, 1953) and Phalangium armatum Snegovaya, 2005, are recorded in Turkey for the first time. Their description, characteristic features, distributions, measurements and photographs of genitalia and general habitus of both sexes are presented.
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    The first record of karyotypes in Leiurus abdullahbayrami and Compsobuthus matthiesseni (Scorpiones: Buthidae) from Turkey
    Stahlavsky, F; Koç, H; Yagmur, EA
    The karyotypes of Leiurus abdullahbayrami Yagmur, Koc & Kunt, 2009 and Compsobuthus matthiesseni (Birula, 1905) from Turkey are presented for the first time. Both analyzed species have achiasmatic meiosis and the same number of holocentric chromosomes (2n=22) gradually decreasing in size. During the first meiotic division we observed tetravalent in one male of L. abdullahbayrann and octovalent in one male of C. matthiesseni. These types of multivalents may increase genetic variability and indicate reciprocal translocations within these species.
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    Evolutionary dynamics of rDNA clusters on chromosomes of buthid scorpions (Chelicerata: Arachnida)
    Stáhlavsky, F; Nguyen, P; Sadílek, D; Stundlová, J; Just, P; Haddad, CR; Koç, H; Ranawana, KB; Stockmann, M; Yagmur, EA; Kovarík, F
    We examined the distribution of genes for major ribosomal RNAs (rDNA) on holokinetic chromosomes of 74 species belonging to 19 genera of scorpions from the family Buthidae using fluorescence in situ hybridization (FISH). Our analysis revealed differences between the two main evolutionary lineages within the family. The genera belonging to the `Buthus group', with a proposed Laurasian origin, possess one pair of rDNA mainly in an interstitial position, with the only exceptions being the terminal location found in some Hottentotta and Buthacus species, possibly as a result of chromosome fissions. All the remaining buthid 'groups' possess rDNA found strictly in a terminal position. However, the number of signals may increase from an ancestral state of one pair of rDNA loci to up to seven signals in Reddyanus ceylonensis Kovarik et al., 2016. Despite the differences in evolutionary dynamics of the rDNA clusters between the 'Buthus group' and other lineages investigated, we found a high incidence of reciprocal translocations and presence of multivalent associations during meiosis in the majority of the genera studied. These phenomena seem to be typical for the whole family Buthidae.
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    Molecular cytogenetics of Androctonus scorpions: an oasis of calm in the turbulent karyotype evolution of the diverse family Buthidae
    Sadílek, D; Nguyen, P; Koç, H; Kovarík, F; Yagmur, EA; Stáhlavsky, F
    Recent cytogenetic and genomic studies suggest that morphological and molecular evolution is decoupled in the basal arachnid order Scorpiones. Extraordinary karyotype variation has been observed particularly in the family Buthidae, which is unique among scorpions for its holokinetic chromosomes. We analyzed the karyotypes of four geographically distant species of the genus AndroctonusEhrenberg, 1828 (Androctonus australis, Androctonus bourdoni, Androctonus crassicauda, Androctonus maelfaiti) (Scorpiones: Buthidae) using both classic and molecular cytogenetic methods. The mitotic complement of all species consisted of 2n=24 elements. Fluorescence in situ hybridization with a fragment of the 18S ribosomal RNA gene, a cytogenetic marker well known for its mobility, identified a single interstitial rDNA locus on the largest chromosome pair in all species examined. Our findings thus support the evolutionary stasis of the Androctonus karyotype, which is discussed with respect to current hypotheses on chromosome evolution both within and beyond the family Buthidae. Differences in karyotype dynamics between Androctonus spp. and the other buthids can help us better understand the driving forces behind their chromosome evolution and speciation.(c) 2015 The Linnean Society of London, Biological Journal of the Linnean Society, 2015, 115, 69-76.