Organisms Diversity & Evolution
Papers 690
1 page of 69 pages (690 results)
Although there is an abundance of species delimitation methods on the market, most approaches depend on predefined assignment of specimens to species or populations. Assignment-free methods, which can simultaneously infer boundaries and relationships among species, are of high importance in cases, when correct pre-assignment is difficult or not at all possible. In this study, we use assignment-free multispecies coalescent-based species delimitation (STACEY, tr2-delimitation, and BP&P), phylogene...
#1Adam Brunke (AAFC: Agriculture and Agri-Food Canada)H-Index: 2
#2M. Salnitska (SPbU: Saint Petersburg State University)
Last. Alexey Solodovnikov (Wild Center)H-Index: 12
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The recognition of Holarctic species, those shared between Nearctic and Palaearctic regions, often implies continuous or recent events of gene flow across the 85-km-wide Bering Strait between Alaska and Russia. During the Pleistocene (2.8–0.012 Mya), the Bering land bridge has provided frequent episodes of continuous, tundra habitat across this barrier, while the taiga forests of the northern hemisphere has been separated for much longer, at least 5.4 Mya. This more ancient divergence has led to...
#1Kamila S. Zając (Jagiellonian University)H-Index: 1
#2Bjørn Arild Hatteland (University of Bergen)H-Index: 6
Last. Dorota Lachowska-Cierlik (Jagiellonian University)H-Index: 8
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Arion vulgaris Moquin-Tandon, 1855 is regarded as one of the 100 most invasive species in Europe. The native distribution range of this species is uncertain, but for many years, the Iberian Peninsula has been considered as the area of origin. However, recent studies indicate that A. vulgaris probably originated from France. We have investigated the genetic structure of 33 European populations (Poland, Norway, Germany, France, Denmark, Switzerland) of this slug, based on two molecular markers, mi...
Braula coeca has been reported repeatedly, but incorrectly, to have only a single spermatheca—an extremely rare condition in the higher flies. This error is based on the misinterpretation of the ventral receptacle as a single spermatheca combined with the failure to detect the two present but largely reduced dorsal spermathecae. This misconception is of importance, e. g., for correct character coding in phylogenetic analyses and in the context of studies regarding recurrent trends in the evoluti...
#1Jimena García-Rodríguez (USP: University of São Paulo)H-Index: 1
#2Cheryl Lewis Ames (National Museum of Natural History)H-Index: 5
Last. Antonio C. Marques (USP: University of São Paulo)H-Index: 22
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Cubozoa jellyfish species exhibit either internal or external fertilization, and reproductive behavior involving spermcasting or complex copulatory sexual behavior, but male gonad morphology has not been investigated broadly in cubozoans. In this study, a histological comparison was conducted of the testes of four cubozoan species in two orders: Carybdea marsupialis (Carybdeidae), Morbakka virulenta (Carukiidae), and Tamoya cf. haplonema (Tamoyidae) in Carybdeida and Chiropsalmus quadrumanus (Ch...
#1Heidi M.L. Heigl (LMU: Ludwig Maximilian University of Munich)
#2Juliane Kretschmann (LMU: Ludwig Maximilian University of Munich)H-Index: 5
Last. Marc Gottschling (LMU: Ludwig Maximilian University of Munich)H-Index: 28
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Despite their ecological importance and wide distribution, Cordiaceae have not been subject to detailed anatomical study yet. We examined flower and fruit anatomies of Cordia nodosa and Varronia bonplandii (using paraffin sectioning and light microscopy) in comparison with other woody members of Boraginales. The internal architecture of the superior bicarpellate ovary resulted from the development of secondary septa including apical, basal and false septa, as reported also from other Boraginales...
#1Judit Bereczki (University of Debrecen)H-Index: 8
#2Szilard Poliska (University of Debrecen)H-Index: 21
Last. János Pál TóthH-Index: 8
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The plausibility of sympatric speciation is still debated despite increasing evidence, such as host races in insects. This speciation process may be occurring in the case of the two phenological forms of the obligatorily myrmecophilous Phengaris arion. The main goal of our research was to study the nature and causes of difference between these forms focusing primarily on the incipient speciation via host races. Molecular analyses based on highly variable microsatellites together with Wolbachia s...
#1Patrícia E. S. Rodrigues (Universidade do Vale do Rio dos Sinos)H-Index: 2
#2Luiz Alexandre Campos (UFRGS: Universidade Federal do Rio Grande do Sul)H-Index: 7
Last. Everton Nei Lopes Rodrigues (Universidade do Vale do Rio dos Sinos)H-Index: 8
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Rhinocricus Karsch, 1881 has 207 species occurring mainly in the Americas, and more than 60 of them were described from Brazil. The genus was proposed based on the presence of dorsal scobinae on the prozonites. The present study evaluates the monophyly of three species groups previously proposed in Rhinocricus. We evaluated 39 morphological characters and included 30 species as terminal taxa, 9 of which are outgroups. We performed a parsimony analysis under implied weighting in TNT 1.5, obtainin...
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