共查询到20条相似文献,搜索用时 31 毫秒
1.
César Román-Valencia Raquel I. Ruiz-C Donald C. Taphorn Carlos A. García-Alzate 《ZooKeys》2014,(454):109-125
Hemibrycon
sanjuanensis, new species, is described from the upper San Juan River drainage, Pacific versant, Colombia. It is distinguished from Hemibrycon
boquiae, Hemibrycon
brevispini, Hemibrycon
cairoense, Hemibrycon
colombianus, Hemibrycon
mikrostiktos, Hemibrycon
metae, Hemibrycon
palomae, Hemibrycon
rafaelense and Hemibrycon
tridens by the presence of a circular or oblong humeral spot that is located two scales posterior to the opercle (vs. 3–4 scales in Hemibrycon
palomae, Hemibrycon
rafaelense, Hemibrycon
brevispini and Hemibrycon
cairoense, and 0–1 scales, in Hemibrycon
metae and Hemibrycon
boquiae). It further differs from Hemibrycon
colombianus in having a round or oblong humeral spot (vs. rectangular). It differs from Hemibrycon
beni, Hemibrycon
dariensis, Hemibrycon
divisorensis, Hemibrycon
helleri, Hemibrycon
huambonicus, Hemibrycon
inambari, Hemibrycon
jabonero, Hemibrycon
jelskii, Hemibrycon
mikrostiktos, Hemibrycon
polyodon, Hemibrycon
quindos, Hemibrycon
raqueliae, Hemibrycon
santamartae, Hemibrycon
surinamensis, Hemibrycon
taeniurus, Hemibrycon
tridens, and Hemibrycon
yacopiae in having melanophores on the posterior margins of the scales along the sides of body (vs. lacking melanophores on margins of scales along entire length of the sides of body). The new species differs from all congeners mentioned above in having, among other features, six teeth in the outer premaxillary row arranged in a straight line (vs. five or fewer teeth not arranged in straight line except Hemibrycon
cairoense with two to six teeth in the outer premaxillary row). 相似文献
2.
Paula C. Rodríguez-Flores Jorge Gutiérrez-Rodríguez Ernesto F. Aguirre-Ruiz Mario García-París 《ZooKeys》2016,(561):63-103
The tiger beetle assemblage of the wetlands of La Mancha (central Spain) comprises nine species: Calomera
littoralis
littoralis, Cephalota
maura
maura, Cephalota
circumdata
imperialis, Cephalota
dulcinea, Cicindela
campestris
campestris, Cicindela
maroccana, Cylindera
paludosa, Lophyra
flexuosa
flexuosa, and Myriochila
melancholica
melancholica. This assemblage represents the largest concentration of tiger beetles in a single 1º latitude / longitude square in Europe. General patterns of spatial and temporal segregation among species are discussed based on observations of 1462 specimens registered during an observation period of one year, from April to August. The different species of Cicindelini appear to be distributed over space and time, with little overlapping among them. Three sets of species replace each other phenologically as the season goes on. Most of the species occupy drying or dried salt lakes and salt marshes, with sparse vegetation cover. Spatial segregation is marked in terms of substrate and vegetation use. Calomera
littoralis and Myriochila
melancholica have been observed mainly on wet soils; Cephalota
circumdata on dry open saline flats; Cephalota
dulcinea and Cylindera
paludosa in granulated substrates with typical halophytic vegetation; Cephalota
maura is often present in man-modified areas. Cephalota
circumdata and Cephalota
dulcinea are included as species of special interest in the list of protected species in Castilla–La Mancha. Conservation problems for the Cicindelini assemblage arise from agricultural activities and inadequate use of sport vehicles. Attempts at restoring the original habitat, supressing old semi-industrial structures, may affect the spatial heterogeneity of the lakes, and have an effect on Cicindelinae diversity. 相似文献
3.
4.
Methodological improvements now allow routine analyses of highly degraded DNA samples as found in museum specimens. Using these methods could be useful in studying such groups as rodents of the genus Gerbillus for which i) the taxonomy is still highly debated, ii) collection of fresh specimens may prove difficult. Here we address precise taxonomic questions using a small portion of the cytochrome b gene obtained from 45 dry skin/skull museum samples (from 1913 to 1974) originating from two African and three Asian countries. The specimens were labelled Gerbillus
gerbillus, Gerbillus
andersoni, Gerbillus
nanus, Gerbillus
amoenus, Gerbillus
perpallidus and Gerbillus
pyramidum, and molecular results mostly confirmed these assignations. The close relationship between Gerbillus
nanus (Asian origin) and Gerbillus
amoenus (African origin) confirmed that they represent vicariant sibling species which differentiated in allopatry on either side of the Red Sea. In the closely related Gerbillus
perpallidus and Gerbillus
pyramidum, specimens considered as belonging to one Gerbillus
pyramidum subspecies (Gerbillus
pyramidum
floweri) appeared closer to Gerbillus
perpallidus suggesting that they (Gerbillus
pyramidum
floweri and Gerbillus
perpallidus) may represent a unique species, distributed on both sides of the Nile River, for which the correct name should be Gerbillus
floweri. Furthermore, the three other Gerbillus
pyramidum subspecies grouped together with no apparent genetic structure suggesting that they may not yet represent genetically differentiated lineages. This study confirms the importance of using these methods on museum samples, which can open new perspectives in this particular group as well as in other groups of interest. 相似文献
5.
Chinese species in the genus Nycheuma Fennah, 1964a (Hemiptera: Fulgoromorpha: Delphacidae: Delphacinae: Delphacini) are revised to include three species: Nycheuma
cognatum (Muir, 1917), Nycheuma
dimorpha (Matsumura, 1910) and Nycheuma
nilotica Linnavuori, 1973. Nycheuma
coctum Yang, 1989 is placed in synonymy with Nycheuma
nilotica Linnavuori, 1973. Nycheuma
dimorpha (Matsumura, 1910) is newly recorded from China. The generic characteristics are redefined. The main morphological characters, male genitalia of 3 species are described or redescribed and illustrated. A key to Chinese species in the genus is provided. 相似文献
6.
The Madagascar periwinkle (
Catharanthus
roseus
in the family Apocynaceae) is an important medicinal plant and is the source of several widely marketed chemotherapeutic drugs. It is also commonly grown for its ornamental values and, due to ease of infection and distinctiveness of symptoms, is often used as the host for studies on phytoplasmas, an important group of uncultivated plant pathogens. To gain insights into the characteristics of apocynaceous plastid genomes (plastomes), we used a reference-assisted approach to assemble the complete plastome of
C
. roseus
, which could be applied to other
C
. roseus
-related studies. The
C
. roseus
plastome is the second completely sequenced plastome in the asterid order Gentianales. We performed comparative analyses with two other representative sequences in the same order, including the complete plastome of
Coffea
arabica
(from the basal Gentianales family Rubiaceae) and the nearly complete plastome of
Asclepias
syriaca
(Apocynaceae). The results demonstrated considerable variations in gene content and plastome organization within Apocynaceae, including the presence/absence of three essential genes (i.e., accD, clpP, and ycf1) and large size changes in non-coding regions (e.g., rps2-rpoC2 and IRb-ndhF). To find plastome markers of potential utility for
Catharanthus
breeding and phylogenetic analyses, we identified 41
C
. roseus
-specific simple sequence repeats. Furthermore, five intergenic regions with high divergence between
C
. roseus
and three other euasterids I taxa were identified as candidate markers. To resolve the euasterids I interordinal relationships, 82 plastome genes were used for phylogenetic inference. With the addition of representatives from Apocynaceae and sampling of most other asterid orders, a sister relationship between Gentianales and Solanales is supported. 相似文献
7.
Yan Hu Brian L. Ellis Ying Y. Yiu Melanie M. Miller Joseph F. Urban Linda Z. Shi Raffi V. Aroian 《PloS one》2013,8(7)
Soil-transmitted helminths are parasitic nematodes that inhabit the human intestine. These parasites, which include two hookworm species,
Ancylostoma
duodenale
and Necator americanus, the whipworm
Trichuris
trichiura
, and the large roundworm
Ascaris
lumbricoides
, infect upwards of two billion people and are a major cause of disease burden in children and pregnant women. The challenge with treating these diseases is that poverty, safety, and inefficient public health policy have marginalized drug development and distribution to control infection in humans. Anthelmintics (anti-worm drugs) have historically been developed and tested for treatment of non-human parasitic nematodes that infect livestock and companion animals. Here we systematically compare the in vitro efficacy of all major anthelmintic classes currently used in human therapy (benzimidazoles, nicotinic acetylcholine receptor agonists, macrocyclic lactones, nitazoxanide) against species closely related to human parasitic nematodes-Ancylostoma ceylanicum,
Trichuris
muris
, and
Ascaris
suum
--- as well as a rodent parasitic nematode used in veterinary drug discovery,
Heligmosomoides
bakeri
, and the free-living nematode Caenorhabditis elegans. Extensive in vitro data is complemented with single-dose in vivo data in three rodent models of parasitic diseases. We find that the effects of the drugs in vitro and in vivo can vary greatly among these nematode species, e.g., the efficacy of albendazole is strong on A. ceylanicum but weak on
H
. bakeri
. Nonetheless, certain commonalities of the in vitro effects of the drugs can be seen, e.g., nitazoxanide consistently shows an all-or-nothing response. Our in vitro data suggest that further optimization of the clinical efficacy of some of these anthelmintics could be achieved by altering the treatment routine and/or dosing. Most importantly, our in vitro and in vivo data indicate that the hookworm A. ceylanicum is a particularly sensitive and useful model for anthelmintic studies and should be incorporated early on in drug screens for broad-spectrum human soil-transmitted helminth therapies. 相似文献
8.
《Biochimica et Biophysica Acta (BBA)/Molecular and Cell Biology of Lipids》2016,1861(5):410-418
Adipose tissue can store over 50% of whole-body cholesterol; however, the physiological role of adipose tissue in cholesterol metabolism and atherogenesis has not been directly assessed. Here, we examined lipoprotein metabolism and atherogenesis in a unique mouse model of severe lipodystrophy: the Seipin−/− mice, and also in mice deficient in both low-density lipoprotein receptor (Ldlr) and Seipin: the Ldlr−/− Seipin−/− mice. Plasma cholesterol was moderately increased in the Seipin−/− mice when fed an atherogenic diet. Strikingly, plasma cholesterol reached ~ 6000 mg/dl in the Seipin−/− Ldlr−/− mice on an atherogenic diet, as compared to ~ 1000 mg/dl in the Ldlr−/− mice on the same diet. The Seipin−/− Ldlr−/− mice also developed spontaneous atherosclerosis on chow diet and severe atherosclerosis on an atherogenic diet. Rosiglitazone treatment significantly reduced the hypercholesterolemia of the Seipin−/− Ldlr−/− mice, and also alleviated the severity of atherosclerosis. Our results provide direct evidence, for the first time, that the adipose tissue plays a critical role in the clearance of plasma cholesterol. Our results also reveal a previously unappreciated strong link between adipose tissue and LDLR in plasma cholesterol metabolism. 相似文献
9.
Labidocera
churaumi
sp. n. is described from Okinawa, southwestern Japan. The female of the new species differs from other congeners in genital compound somite with right postero-lateral and left antero-lateral processes. The male is distinguished from other congeners by the structure of the fifth leg. This new species is assigned to a newly proposed species group, the Labidocera
madurae species group, within the Labidocera
detruncata species complex. In this species complex five Indo-West Pacific species groups are recognized (cervi, detruncata, gangetica, madurae, and pavo) and defined on the basis of difference in sexual dimorphism. 相似文献
10.
Leana Doherty Adrianna Vlachos Valerie Choesmel Marie-Françoise O'Donohue Catherine Clinton Colin A. Sieff Peter E. Newburger Edyta Niewiadomska Bertil Glader Jason E. Farrar Jeffrey M. Lipton Pierre-Emmanuel Gleizes Hanna T. Gazda 《American journal of human genetics》2010,86(2):222-6951
Diamond-Blackfan anemia (DBA), an inherited bone marrow failure syndrome characterized by anemia that usually presents before the first birthday or in early childhood, is associated with birth defects and an increased risk of cancer. Although anemia is the most prominent feature of DBA, the disease is also characterized by growth retardation and congenital malformations, in particular craniofacial, upper limb, heart, and urinary system defects that are present in ∼30%–50% of patients. DBA has been associated with mutations in seven ribosomal protein (RP) genes, RPS19, RPS24, RPS17, RPL35A, RPL5, RPL11, and RPS7, in about 43% of patients. To continue our large-scale screen of RP genes in a DBA population, we sequenced 35 ribosomal protein genes, RPL15, RPL24, RPL29, RPL32, RPL34, RPL9, RPL37, RPS14, RPS23, RPL10A, RPS10, RPS12, RPS18, RPL30, RPS20, RPL12, RPL7A, RPS6, RPL27A, RPLP2, RPS25, RPS3, RPL41, RPL6, RPLP0, RPS26, RPL21, RPL36AL, RPS29, RPL4, RPLP1, RPL13, RPS15A, RPS2, and RPL38, in our DBA patient cohort of 117 probands. We identified three distinct mutations of RPS10 in five probands and nine distinct mutations of RPS26 in 12 probands. Pre-rRNA analysis in lymphoblastoid cells from patients bearing mutations in RPS10 and RPS26 showed elevated levels of 18S-E pre-rRNA. This accumulation is consistent with the phenotype observed in HeLa cells after knockdown of RPS10 or RPS26 expression with siRNAs, which indicates that mutations in the RPS10 and RPS26 genes in DBA patients affect the function of the proteins in rRNA processing. 相似文献
11.
Reginald P. Webster Chantelle A. Alderson Vincent L. Webster CoryC. Hughes Jon D. Sweeney 《ZooKeys》2016,(552):109-122
Sixteen species of Cerambycidae are newly recorded for New Brunswick, Canada; Arhopalus
obsoletus (Randall), Atimia
confusa
confusa (Say), Callidium
frigidum Casey, Phymatodes
amoenus (Say), Phymatodes
testaceus (Linnaeus), Neoclytus
mucronatus
mucronatus (Fabricius), Xylotrechus
aceris Fisher, Xylotrechus
sagittatus
sagittatus (Germar), Tylonotus
bimaculatus Haldeman, Lepturges
angulatus (LeConte), Lepturges
symmetricus (Haldeman), Urgleptes
querci (Fitch), Oplosia
nubila (LeConte), Eupogonius
subarmatus (LeConte), Monochamus
carolinensis (Olivier), and Pogonocherus
parvulus LeConte. Urgleptes
signatus (LeConte) and Urgleptes
querci are newly recorded from Nova Scotia. All but two specimens were collected in 12-funnel Lindgren traps. Xylotrechus
aceris, Tylonotus
bimaculatus, Lepturges
angulatus, Lepturges
symmetricus, Urgleptes
signatus (NS), and Pogonocherus
parvulus were detected exclusively in traps deployed in the forest canopy, and most individuals of Oplosia
nubila and Monochamus
carolinensis were captured in canopy traps. Arhopalus
obsoletus, Atimia
confusa
confusa, Callidium
frigidum, Phymatodes
testaceus, and Xylotrechus
sagittatus
sagittatus were captured almost exclusively in traps near (1 m above) the forest floor. These results highlight the importance of sampling both the understory and upper canopy when using traps for surveying diversity of Cerambycidae. 相似文献
12.
Three species of the genus Xenocerogria Merkl, 2007 have been recorded in China, Xenocerogria
feai (Borchmann, 1911), Xenocerogria
ignota (Borchmann, 1941) and Xenocerogria
ruficollis (Borchmann, 1912). Xenocera
xanthisma Chen, 2002 is proposed as a junior synonym of Xenocerogria
ruficollis. Lectotype of Xenocerogria
ignota is designated, and the species is transferred to the genus Lagria Fabricius, 1775. New Chinese province records of Xenocerogria
ruficollis are provided. 相似文献
13.
14.
Yu. A. Prisniy 《Entomological Review》2012,92(9):994-1001
The results of long-term studies of mosquitoes in Belgorod Province are reported. The material was collected at 54 sites situated in 15 districts of the province. Different biotopes were investigated during the spring-autumn period. Larvae and adult mosquitoes were used for identification. A total of 27 mosquito species were found in the region examined. The following species were recorded for the first time: Ae. (Och.) communis. Ae. (Och.) diantaeus. Ae. (Och.) pulchritarsis. Ae. (Och.) sticticus, and Cx. (Bar.) modestus; and also the form Cx. (Cux.) pipiens pipiens biotype molestus. The frequency of occurrence of each species in different biotopes and different localities is given. The most widespread and common species in Belgorod Province include Ae. (Och.) cantans (Mg.), Ae. (Och.) cataphylla Dyar, Ae. (Fin.) geniculatus (Ol.), Ae. (Adm.) vexans (Mg.), Cx. (Cux.) pipiens, and Cx. (Cux.) pipiens pipiens biotype molestus. 相似文献
15.
Xianzhong Chen Huiying Fang Bin Zhuge Zhengxiang Wang Algasan Govender Jian Zhuge 《Process Biochemistry》2013,48(10):1469-1475
16.
A list of the 356 species of Cecidomyiidae (Diptera) recorded from Finland is presented, which comprises 6 Lestremiinae, 156 Micromyinae, 16 Winnertziinae, 69 Porricondylinae, and 109 Cecidomyiinae. The faunistic knowledge of Finnish Winnertziinae, Porricondylinae and Cecidomyiinae is regarded as particularly poor. Based on species numbers known from other countries in Europe, a conservative estimate is 700–800 species of Cecidomyiidae actually occurring in Finland. 相似文献
17.
Jaime Troncoso-Palacios Alvaro A. Elorza German I. Puas Edmundo Alfaro-Pardo 《ZooKeys》2016,(555):91-114
The Liolaemus
nigroviridis group is a clade of highland lizards endemic to Chile. These species are distributed from northern to central Chile, and currently there are no cases of sympatric distribution. This study describes a new species, Liolaemus
uniformis
sp. n., from this group, and provides a detailed morphological characterization and mitochondrial phylogeny using cytochrome-b. Liolaemus
uniformis was found in sympatry with Liolaemus
nigroviridis but noticeably differed in size, scalation, and markedly in the color pattern, without sexual dichromatism. This new species has probably been confused with Liolaemus
monticola and Liolaemus
bellii, both of which do not belong to the nigroviridis group. The taxonomic issues of this group that remain uncertain are also discussed. 相似文献
18.
Juan J. Morrone 《ZooKeys》2013,(273):15-71
The phylogenetic relationships of the genera of Listroderini LeConte, 1876 are analyzed based on 58 morphological characters. The genera are grouped in four clades, which are given subtribal status: Macrostyphlina new subtribe (Adioristidius, Amathynetoides, Andesianellus, Macrostyphlus, Nacodius and Puranius), Palaechthina Brinck, 1948 (Anorthorhinus, Gunodes, Haversiella, Inaccodes, Listronotus, Neopachytychius, Palaechthus, Palaechtodes, Steriphus and Tristanodes), Falklandiina new subtribe (Falklandiellus, Falklandiopsis, Falklandius, Gromilus, Lanteriella, Liparogetus, Nestrius and Telurus), and Listroderina (Acroriellus, Acrorius, Acrostomus, Antarctobius, Germainiellus, Hyperoides, Lamiarhinus, Listroderes, Methypora, Philippius, Rupanius and Trachodema). The subtribes are characterized and keys to identify them and their genera are provided. Listroderini have four main biogeographical patterns: Andean (Macrostyphlina), Andean-New Zealand (Falklandiina), Andean-Neotropical-Australian (Listroderina) and Andean-Neotropical-Australian-New Zealand-Nearctic-Tristan da Cunha-Gough islands (Palaechthina). Geographical paralogy, particularly evident in the Subantarctic subregion of the Andean region, suggests that Listroderini are an ancient Gondwanic group, in which several extinction events might have obscured relationships among the areas. 相似文献
19.
20.
We describe Lonchophylla
inexpectata
sp. n. from the Caatinga of Brazil. This new species can be distinguished from all known species of Lonchophylla that occur in Brazil by dental traits, cranial size, and fur colour. Specimens of Lonchophylla
inexpectata have been misidentified as Lonchophylla
mordax; but Lonchophylla
inexpectata is a pale-venter species, similar in external appearance to Lonchophylla
dekeyseri. We have found Lonchophylla
inexpectata in the Caatinga of North-eastern Brazil; Lonchophylla
mordax along the eastern border of the Caatinga and in the Atlantic Forest–Caatinga ecotone in North-eastern Brazil; and Lonchophylla
dekeyseri in the Cerrado of Mid-western Brazil, in the Brazilian Cerrado–Caatinga ecotone, and as far west as the Cerrado of Bolivia. 相似文献