scholarly journals New records and geographic distribution of the sympatric zones of unisexual and bisexual rock lizards of the genus Darevskia in Armenia and adjacent territories

2020 ◽  
Vol 8 ◽  
Author(s):  
Varos Petrosyan ◽  
Fedor Osipov ◽  
Vladimir Bobrov ◽  
Natalia Dergunova ◽  
Ivan Kropachev ◽  
...  
Keyword(s):  
New Records ◽  
Parental Species ◽  
Reticulate Evolution ◽  
Interspecific Hybridisation ◽  
Altitudinal Distribution ◽  
Bisexual Species ◽  
Parthenogenetic Species ◽  
Natural Hybridisation ◽  
And Bisexual

Caucasian rock lizards of the genus is a unique taxa, including both bisexual and parthenogenetic species. The parthenogenetic species have originated as a result of natural hybridisation between females and males of different bisexual species. The species involved in interspecific hybridisation are called parental. However, sympatric zones (SZ) of unisexual and bisexual rock lizards of the Caucasus are still poorly studied, although they are very important for understanding the role of hybrid individuals of different origin in reticulate evolution. This paper presents the location of the SZs of parthenogenetic and their parental bisexual rock lizards of the genus Darevskia in Armenia and adjacent territories of Georgia and Nagorno-Karabakh. We summarised the locations of the SZs identified from 1957 to the present, based on our field survey data gathered in 2018-2019 and records from publications and museum collections. This dataset includes 39 SZs of three types: SZ of parental bisexual species, SZ of parental species with unisexual species and SZ of the parthenogenetic species. For each zone, species composition, geographical and altitudinal distribution are presented. New records expand our knowledge of the geographical and altitudinal distribution of SZs in these species and provide additional data for understanding the mechanisms of reticulate evolution and hybridogeneous speciation in the past, present and future. The new records, including geographical and altitudinal distributions of three types of SZs, are presented, which expand the previously-known list to 39 locations of contact zones for parthenogenetic and its bisexual parental species of rock lizards of the genus Darevskia in Armenia and the adjacent territories of Georgia and Nagorno-Karabakh.

Parthenogenesis as a life strategy among mites of the suborder Uropodina (Acari: Mesostigmata)

2004 ◽  
Vol 82 (9) ◽  
pp. 1503-1511 ◽  
Author(s):  
J Bloszyk ◽  
Z Adamski ◽  
A Napierala ◽  
M Dylewska
Keyword(s):  
Geographical Distribution ◽  
Small Mammals ◽  
Significant Relationship ◽  
Dead Wood ◽  
Forest Litter ◽  
Life Strategy ◽  
Bisexual Species ◽  
Parthenogenetic Species ◽  
Evolutionary Aspects

This paper presents the results of observations concerning the phenomenon of parthenogenesis among European mites of the suborder Uropodina. An analysis of the sex ratios of 66 Polish species revealed that 18 of them (more than one fourth of the examined species) consisted only of females. The authors observed no significant relationship between geographical distribution and the lack of males in the population. Populations consisting entirely of females were observed among widely distributed species as well as among species characterized by narrow geographical ranges. Nonetheless, an increase in the number of parthenogenetic species, especially as a percentage of Middle European and Scandinavian fauna, was also discernible. Species that reproduced without males were associated with forest litter and soil, whereas bisexual species "eagerly" inhabited various relatively unstable and temporary micro environ ments (for instance, dead wood, birds' or small mammals' nests). The authors aim to define the biological role of occasionally appearing males for the species consisting almost entirely of females and discuss ecological and evolutionary aspects of parthenogenesis in mites of the suborder Uropodina.

scholarly journals New records of Darevskia armeniaca (Méhely, 1909) and Darevskia valentini (Boettger, 1892) (Squamata, Sauria, Lacertidae) from Armenia and updated geographic distribution maps

Check List ◽  
2019 ◽  
Vol 15 (1) ◽  
pp. 21-31
Author(s):  
Varos G. Petrosyan ◽  
Fedor A. Osipov ◽  
Vladimir V. Bobrov ◽  
Natalia N. Dergunova ◽  
Felix D. Danielyan ◽  
...  
Keyword(s):  
Geographic Distribution ◽  
Additional Data ◽  
Field Survey ◽  
New Records ◽  
Reticulate Evolution ◽  
Hybrid Speciation ◽  
Bisexual Species ◽  
Distribution Maps

During field survey in 2018, we recorded in Armenia the occurrences of the parthenogenetic lizard Darevskia armeniaca and its “paternal” bisexual species D. valentini. Based on our new data and records taken from publications and museums, we update the distribution maps of these species. The new records expand the geographical boundaries of sympatric habitats of these species and provide additional data for understanding the mechanisms of reticulate evolution and hybrid speciation.

scholarly journals Molecular Signatures of Reticulate Evolution within the Complex of European Pine Taxa

Forests ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 489
Author(s):  
Bartosz Łabiszak ◽  
Witold Wachowiak
Keyword(s):  
Gene Flow ◽  
Reticulate Evolution ◽  
Modeling Framework ◽  
Closely Related Species ◽  
Interspecific Gene Flow ◽  
Nucleotide Sequence Variation ◽  
History Of ◽  
Best Fitting ◽  
Species Integrity

Speciation mechanisms, including the role of interspecific gene flow and introgression in the emergence of new species, are the major focus of evolutionary studies. Inference of taxonomic relationship between closely related species may be challenged by past hybridization events, but at the same time, it may provide new knowledge about mechanisms responsible for the maintenance of species integrity despite interspecific gene flow. Here, using nucleotide sequence variation and utilizing a coalescent modeling framework, we tested the role of hybridization and introgression in the evolutionary history of closely related pine taxa from the Pinus mugo complex and P. sylvestris. We compared the patterns of polymorphism and divergence between taxa and found a great overlap of neutral variation within the P. mugo complex. Our phylogeny reconstruction indicated multiple instances of reticulation events in the past, suggesting an important role of interspecific gene flow in the species divergence. The best-fitting model revealed P. mugo and P. uncinata as sister species with basal P. uliginosa and asymmetric migration between all investigated species after their divergence. The magnitude of interspecies gene flow differed greatly, and it was consistently stronger from representatives of P. mugo complex to P. sylvestris than in the opposite direction. The results indicate the prominent role of reticulation evolution in those forest trees and provide a genetic framework to study species integrity maintained by selection and local adaptation.

scholarly journals Rhinocerotidae from the early Miocene of the Negev (Israel) and implications for the dispersal of early Neogene rhinoceroses

2021 ◽  
pp. 1-12
Author(s):  
Luca Pandolfi ◽  
Ran Calvo ◽  
Ari Grossman ◽  
Rivka Rabinovich
Keyword(s):  
Southeast Asia ◽  
South Asian ◽  
North Africa ◽  
Range Expansion ◽  
New Records ◽  
Ct Scanning ◽  
Early Miocene ◽  
Early Neogene ◽  
Postcranial Remains

Abstract A revision of the rhinocerotid material from the Negev (Israel), dating back to the early Miocene (MN3 in the European Mammal Biochronology), highlights the presence of Brachypotherium and a taxon close to Gaindatherium in the Levantine corridor. A juvenile mandible, investigated using CT scanning, displays morphologically distinct characters consistent with Brachypotherium cf. B. snowi rather than with other Eurasian representatives of this genus. Some postcranial remains from the Negev, such as a humerus, display features that distinguish it among Miocene taxa. We attribute these postcrania to cf. Gaindatherium sp., a taxon never recorded outside the Siwaliks until now. This taxon dispersed into the Levantine region during the late early Miocene, following a pattern similar to other South Asian taxa. Brachypotherium cf. B. snowi probably occurred in the Levantine region and then in North Africa during the early Miocene because its remains are known from slightly younger localities such as Moghara (Egypt) and Jebel Zelten (Libya). The occurrence cf. Gaindatherium sp. represents a previously unrecorded range expansion out of Southeast Asia. These new records demonstrate the paleogeographic importance of the Levantine region showcasing the complex role of the Levantine corridor in intercontinental dispersals between Asia and Europe as well as Eurasia and Africa.

scholarly journals Surveying Potential Vectors of Apple Proliferation Phytoplasma: Faunistic Analysis and Infection Status of Selected Auchenorrhyncha Species

Insects ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 12
Author(s):  
Stefanie Fischnaller ◽  
Martin Parth ◽  
Manuel Messner ◽  
Robert Stocker ◽  
Christine Kerschbamer ◽  
...  
Keyword(s):  
New Records ◽  
Regional Scale ◽  
Insect Vectors ◽  
Infection Status ◽  
Apple Proliferation ◽  
Population Densities ◽  
South Tyrol ◽  
Candidatus Phytoplasma Mali ◽  
Cacopsylla Melanoneura

Apple proliferation (AP) is one of the economically most important diseases in European apple cultivation. The disease is caused by the cell-wall-less bacterium ’ Candidatus Phytoplasma mali’, which is transmitted by Cacopsylla picta (Foerster) and Cacopsylla melanoneura (Foerster) (Hemiptera: Psylloidea). In South Tyrol (Italy), severe outbreaks were documented since the 1990s. Infestation rates of AP do not always correlate with the population densities of the confirmed vectors, implying the presence of other, so far unknown, hemipterian vectors. By elucidating the species community of Auchenorrhyncha (Insecta: Hemiptera) at a regional scale, more than 31,000 specimens were captured in South Tyrolean apple orchards. The occurrence of 95 species was confirmed, whereas fourteen species are new records for this territory. Based on the faunistical data, more than 3600 individuals out of 25 species were analyzed using quantitative PCR to assess the presence of AP phytoplasma. The pathogen was sporadically detected in some individuals of different species, for example in Stictocephala bisonia Kopp and Yonk (Hemiptera: Membracidae). However, the concentration of phytoplasma was much lower than in infected C. picta and C. melanoneura captured in the same region, confirming the role of the latter mentioned psyllids as the main insect vectors of AP- phytoplasma in South Tyrol.

scholarly journals The Role of Maladaptive Cognitions in Hypersexuality Among Highly Sexually Active Gay and Bisexual Men

2014 ◽  
Vol 43 (4) ◽  
pp. 669-683 ◽  
Author(s):  
John E. Pachankis ◽  
H. Jonathon Rendina ◽  
Ana Ventuneac ◽  
Christian Grov ◽  
Jeffrey T. Parsons
Keyword(s):  
Gay And Bisexual Men ◽  
Sexually Active ◽  
Bisexual Men ◽  
Maladaptive Cognitions ◽  
And Bisexual

scholarly journals Altitudinal Distribution of Bryoflora at Chandragiri Mountain Forest of Kathmandu District, Central Nepal

2015 ◽  
Vol 28 ◽  
pp. 81-92
Author(s):  
Nirmala Pradhan
Keyword(s):  
New Records ◽  
Mountain Forest ◽  
Habitat Types ◽  
Altitudinal Distribution ◽  
The West ◽  
Moss Species ◽  
The Road ◽  
Central Nepal

Chandragiri Mountain forest in Kathmandu borders Makwanpur district to the west was least known for bryophytes till this study was conducted. This mountain forest with varying elevation ranges from 1365 to 2300 m offered different habitat types for diverse bryofloral species which included 58 species of 39 genera categorized under 27 families and nine orders. Of the recorded species 18 species were rare and five new records to country’s list. Sauteria spongiosa (Kashyap) S. Hatt., a rare moss species was not recorded in this study though was reported for the fi rst time at 2250 m of this mountain in 1982. The habitat of this moss has completely been destroyed now due to expansion of the road in this part.J. Nat. Hist. Mus. Vol. 28, 2014: 81-92

scholarly journals Amphibia, Anura, Leiuperidae, Pleurodema thaul (Lesson, 1827): Altitudinal distribution extension and new records from its northern range

Check List ◽  
2010 ◽  
Vol 6 (1) ◽  
pp. 010 ◽  
Author(s):  
Claudio Correa Quezada ◽  
Edvin Riveros ◽  
Gabriel Lobos ◽  
Nelson Velásquez
Keyword(s):  
New Records ◽  
Altitudinal Distribution ◽  
Altitudinal Range ◽  
New Localities ◽  
Extreme North

The current study reports five new localities of the four-eyed frog Pleurodema thaul (Lesson, 1827) in the extreme north of its distribution (27° to 30° S) in the desertic and semidesertic ravines of Chile, including an increase in its altitudinal range up to 3125 m.

scholarly journals Multiple-Locus Sequence Typing and Analysis of Toxin Genes in Bacillus cereus Food-Borne Isolates

2007 ◽  
Vol 74 (3) ◽  
pp. 850-860 ◽  
Author(s):  
Barbara Cardazzo ◽  
Enrico Negrisolo ◽  
Lisa Carraro ◽  
Leonardo Alberghini ◽  
Tomaso Patarnello ◽  
...  
Keyword(s):  
Gene Transfer ◽  
Bacillus Cereus ◽  
Reticulate Evolution ◽  
Sequence Information ◽  
Data Set ◽  
Group I ◽  
Food Borne ◽  
Public Data ◽  
Encoding Genes

ABSTRACT In the present study we characterized 47 food-borne isolates of Bacillus cereus using multilocus sequence typing (MLST). Newly determined sequences were combined with sequences available in public data banks in order to produce the largest data set possible. Phylogenetic analysis was performed on a total of 296 strains for which MLST sequence information is available, and three main lineages—I, II, and III—within the B. cereus complex were identified. With few exceptions, all food-borne isolates were in group I. The occurrence of horizontal gene transfer (HGT) among various strains was analyzed by several statistical methods, providing evidence of widespread lateral gene transfer within B. cereus. We also investigated the occurrence of toxin-encoding genes, focusing on their evolutionary history within B. cereus. Several patterns were identified, indicating a pivotal role of HGT in the evolution of toxin-encoding genes. Our results indicate that HGT is an important element in shaping the population structure of the B. cereus complex. The results presented here also provide strong evidence of reticulate evolution within the B. cereus complex.

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