共查询到20条相似文献,搜索用时 15 毫秒
1.
Aim This study uses molecular data in conjunction with palaeogeography to infer the most plausible biogeographical scenario accounting for the current distributional pattern of Iurus dufoureius .
Location North-eastern Mediterranean region.
Methods Sequencing of a 441-bp segment of the mitochondrial 16S rRNA gene in seven populations covering the whole distributional range of the species. Phylogenetic analyses performed included neighbour joining, maximum parsimony and Bayesian inference.
Results The molecular phylogeny showed that two Iurus clades are strongly supported. These clades correspond to the two subspecies Iurus dufoureius dufoureius and Iurus dufoureius asiaticus , currently recognized within the genus. The assumption of a clock-like evolution could not be rejected, and this enabled us to estimate an approximation of the local rate of evolution for the I. dufoureius lineages. Based on the estimated evolutionary rate (0.79 ± 0.17 Myr−1 ), the split between the two Iurus clades occurred c. 8 Ma.
Main conclusions Contrary to what was believed in the past, the genus Iurus is an old north-eastern Mediterranean genus that has been differentiating in southern Greece and south-west Turkey at least from the middle Miocene. According to the phylogenetic trees obtained and the dating of the divergence times of lineages, the genus dispersed into the Aegean Archipelago when the Aegean was still a uniform land mass. Although the phylogenetic relationships of I. d. dufoureius populations have been shaped by the most recent vicariant events, the phylogenetic relationships of I. d. asiaticus populations are mostly attributable to older palaeoevents occurring in the area. 相似文献
Location North-eastern Mediterranean region.
Methods Sequencing of a 441-bp segment of the mitochondrial 16S rRNA gene in seven populations covering the whole distributional range of the species. Phylogenetic analyses performed included neighbour joining, maximum parsimony and Bayesian inference.
Results The molecular phylogeny showed that two Iurus clades are strongly supported. These clades correspond to the two subspecies Iurus dufoureius dufoureius and Iurus dufoureius asiaticus , currently recognized within the genus. The assumption of a clock-like evolution could not be rejected, and this enabled us to estimate an approximation of the local rate of evolution for the I. dufoureius lineages. Based on the estimated evolutionary rate (0.79 ± 0.17 Myr
Main conclusions Contrary to what was believed in the past, the genus Iurus is an old north-eastern Mediterranean genus that has been differentiating in southern Greece and south-west Turkey at least from the middle Miocene. According to the phylogenetic trees obtained and the dating of the divergence times of lineages, the genus dispersed into the Aegean Archipelago when the Aegean was still a uniform land mass. Although the phylogenetic relationships of I. d. dufoureius populations have been shaped by the most recent vicariant events, the phylogenetic relationships of I. d. asiaticus populations are mostly attributable to older palaeoevents occurring in the area. 相似文献
2.
3.
4.
The species Rhoptrocentrus
piceus Marshall (Hymenoptera: Braconidae) was reared from the larvae of the xylophagous beetle Psacothea
hilaris
hilaris (Pascoe) (Coleoptera: Cerambycidae), an exotic pest of Ficus and Morus species native to eastern Asia. It was recorded in the north of Italy in September 2005. This discovery is the first report of this species as parasitoids of the yellow spotted longicorn beetle all over the world. 相似文献
5.
6.
Female imagines, subimagines, eggs and larvae of Electrogena antalyensis (Kazanci & Braasch) from Turkey are described for the first time. The results of a thorough analysis of larvae, based on the standard set of diagnostic characters for the identification of Electrogena species, are reported. The peculiarity of several characters places E. antalyensis in an isolated position within the genus Electrogena. 相似文献
7.
Oecetis
tripunctata is a widely distributed leptocerid in Europe, ranging from the Iberian and Apennine peninsulas and the Central and Western European highlands to the plains of Eastern Europe. The long, single-bladed mandibles are indicative for a predacious lifestyle. This paper describes the previously unknown larva of Oecetis
tripunctata. Information on the morphology of the 5th larval instar is given, and the most important diagnostic features are illustrated. A synoptic key for the European species of Oecetis is also provided. In the context of existing identification keys the larva of Oecetis
tripunctata keys together with Oecetis
intima and Oecetis
notata. Oecetis
tripunctata is separated from the other two species by the fact that a double row of long setal fringes is lacking at the hind tibiae and that several long setae are present on the protrochantinus. 相似文献
8.
The thermally induced helix-coil transitions of three A-T DNAs, d(A)n·d(T)n, d(A-T)n·d(A-T)n, and d(A-A-T)n·d(A-T-T)n, were studied. Experimental transition curves of the DNAs were analyzed using the loop entropy model of DNA melting. The calculation of the melting curve of d(A-A-T)n·d(A-T-T)n is presented using the integral equation formalism of Goel and Montroll. The aim of this work was to evaluate thermodynamic parameters which govern DNA stability and to test the theoretical model employed in the analysis. Our results show (1) an excellent over-all agreement between theory and experiment, (2) a loop entropy exponent k = 1.55 ± 0.05 provided the best fit to all the polymer transition curves, (3) the evaluated stacking free energies reflect the relative stability of the DNAs, and (4) the stacking energies of the ApA·TpT dimer evaluated from d(A)n·d(T)n and d(A-A-T)n·d(A-T-T)n differ. The last result is consistent with different conformations for the dimer in these two polymers. 相似文献
9.
B. Christian Schmidt 《ZooKeys》2015,(527):103-126
The Lacinipolia
vicina (Grote) species complex, previously consisting of Lacinipolia
vicina, Lacinipolia
teligera (Morrison), Lacinipolia
pensilis (Grote), and Lacinipolia
subalba Mustelin is revised to six species: Lacinipolia
vicina (eastern USA), Lacinipolia
teligera (southern Great Plains), Lacinipolia
pensilis (Pacific Northwest and northern Rocky Mountains), Lacinipolia
acutipennis (Grote), stat. rev. (= Lacinipolia
subalba
syn. n.) (western North America), Lacinipolia
sareta (Smith), stat. rev. (Canada and western USA) and Lacinipolia
dimocki, sp. n. (California and Pacific Northwest). Lectotypes are designated for Lacinipolia
vicina, Lacinipolia
teligera and Lacinipolia
pensilis. 相似文献
10.
Romain Vullo Eric Buffetaut Didier Néraudeau Jean Le Lœuff Jean-François Heil Michèle Dunand 《Annales de Paléontologie》2012
The “Megalosaur” remains from Saint-Agnant (Charente-Maritime, France), reported as early as 1881 by Boissellier, are here described and figured for the first time. These bones, as well as a few additional specimens from the nearby locality of Soubise, belong in fact to an indeterminate sauropod. The stratigraphical position of these remains unambiguously indicates an infra-Cenomanian age. However, the presence in this area of continental deposits with Purbeckian and Wealden facies does not allow to decide between an earliest or late Early Cretaceous age. 相似文献
11.
12.
13.
14.
15.
16.
The insect orders Megaloptera and Neuroptera are closely related members of the superorder Neuropterida, a relict lineage
of holometabolous insects that also includes the Raphidoptera. Megaloptera, composed of the families Sialidae and Corydalidae
(including subfamilies Chauliodinae and Corydalinae), has fully aquatic larvae that occur in a wide variety of lotic and lentic
habitats, including temporary streams. In total, 2 of 17 families of Neuroptera have aquatic larvae: Nevrorthidae live in
the benthos of fast-flowing streams and Sisyridae reside on freshwater sponges. A third family of Neuroptera, Osmylidae, contains
some water-dependent species that reside under leaves and rocks along the margins of waterbodies. We recognize 328 extant,
described species of Megaloptera (composed of 116 species of Chauliodinae, 131 species of Corydalinae, and 81 species of Sialidae)
and 73 species of aquatic Neuroptera (composed of 12 species of Nevrorthidae and 61 species of Sisyridae). Additionally, we
estimate that 45 species of Osmylidae are water-dependent, although the ecology of this group is poorly understood. Chauliodinae
and Corydalidae are both found in the New World, the Oriental region, and South Africa, but are absent from Europe, the Middle
East, Central Asia, tropical Africa, and boreal regions. Chauliodinae is quite speciose in Australia, whereas Corydalinae
is absent. Sialidae is most speciose in temperate regions, and is absent from tropical Africa and portions of the Oriental
region. Sisyridae and Osmylidae are nearly cosmopolitan, but the relict family Nevrorthidae is limited to Japan, the Mediterranean,
and Australia. The discovery of many new species in recent years, particularly among Corydalidae in the Neotropics and China,
suggests that our knowledge of aquatic neuropterid diversity is far from complete.
Guest editors: E. V. Balian, C. Lévêque, H. Segers and K. Martens
Freshwater Animal Diversity Assessment 相似文献
17.
F. Demartin M. L. Ganadu G. Lubinu L. Naldini A. Panzanelli 《Journal of inorganic biochemistry》1995,60(4):233-243
The reaction between cimetidine in a methanolic solution of KOH and a dichloromethane solution of PPh3AuCl affords a new compound with formula [L-Au-PPh3] (I) (L = 2-(N-methyl-N′-cyano-N″-ethylguanidino)thiolate), the thiolato ligand resulting from cleavage of one of the thioether bonds of cimetidine. (I) has been characterized by elemental analysis, infrared, and 1H and 13C NMR spectroscopy. Single crystal x-ray structure determination shows that the gold atom is linearly coordinated by a phosphine ligand (Au-P 2.258(1) Å) and by an S atom (Au-S 2.282(1) Å) of the thiolato ligand. Crystal data: triclinic, space group P
with a = 8.848(1), b = 11.343(3), c = 12.107(3)Å, = 87.63(1), β = 85.24(1), γ = 79.89(1)°, R = 0.024 for 3673 reflections with I > 3 δ (I). 相似文献
18.
19.