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1.
Zootaxa ; 4657(2): zootaxa.4657.2.9, 2019 Aug 19.
Artigo em Inglês | MEDLINE | ID: mdl-31716790

RESUMO

Four new species of genus Rhyacophila are described and illustrated from Thailand and Myanmar, Southeast Asia. Rhyacophila longicaudata sp. n. is in the R. nigrocephala Group; the very long basal segment of each inferior appendage distinguishes it from other related species. Rhyacophila aksornkoaei sp. n. and R. limsakuli sp. n. are in the R. anatina Group: they can be differentiated from other species of the group by the brush-like parameres and presence of a ventral process of the aedeagus in R. aksornkoaei sp. n., and by the rectangular apical segment of each inferior appendage and the hooked parameres in R. limsakuli sp. n.. Rhyacophila kengtungensis is in the R. yishepa Group and is characterized by the subtriangular shape of the preanal appendages in dorsal view and by the very large dorsal appendages of the phallic apparatus.


Assuntos
Holometábolos , Insetos , Distribuição Animal , Animais , Mianmar , Tailândia
2.
Insects ; 10(5)2019 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-31052441

RESUMO

The holometabolous insect order Trichoptera (caddisflies) includes more known species than all of the other primarily aquatic orders of insects combined. They are distributed unevenly; with the greatest number and density occurring in the Oriental Biogeographic Region and the smallest in the East Palearctic. Ecosystem services provided by Trichoptera are also very diverse and include their essential roles in food webs, in biological monitoring of water quality, as food for fish and other predators (many of which are of human concern), and as engineers that stabilize gravel bed sediment. They are especially important in capturing and using a wide variety of nutrients in many forms, transforming them for use by other organisms in freshwaters and surrounding riparian areas. The general pattern of evolution for trichopteran families is becoming clearer as more genes from more taxa are sequenced and as morphological characters are becoming understood in greater detail. This increasingly credible phylogeny provides a foundation for interpreting and hypothesizing the functional traits of this diverse order of freshwater organisms and for understanding the richness of the ecological services corresponding with those traits. Our research also is gaining insight into the timing of evolutionary diversification in the order. Correlations for the use of angiosperm plant material as food and case construction material by the earliest ancestors of infraorder Plenitentoria-by at least 175 Ma-may provide insight into the timing of the origin of angiosperms.

3.
Zookeys ; (819): 507-520, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30713460

RESUMO

Trichoptera, or caddisflies, are common members of freshwater ecosystems as larvae and are important indicators of aquatic system health. As such, the species are relatively well studied, with keys available for larvae and adults of many of the taxa occurring in Canada. The number of species recorded from Canada since 1979 (Wiggins 1979) has increased from 546 to 636, an increase of 16.4%. Of those species newly recorded, 17 represent newly described taxa since 1979. Taking into consideration the species likely to be subsequently found in Canada based on records in adjacent parts of the United States and results from DNA barcoding, an estimated 129-181 species remain to be documented in Canada.

4.
Zookeys ; (656): 1-23, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28331400

RESUMO

Three new species of Metalype from China, Metalype hubeiensis Qiu & Morse, sp. n., Metalype shexianensis Qiu & Morse, sp. n., and Metalype truncata Qiu & Morse, sp. n., are described and illustrated. Metalype uncatissima (Botosaneanu, 1970) is reported from China for the first time. The differences between genus Metalype and genus Psychomyia are discussed and four Psychomyia species are transferred to Metalype: Metalype holzenthali (Schmid, 1997); Metalype klapaleki (Malicky, 1995a); Metalype kumari (Schmid, 1997); and Metalype nithaiah (Malicky, 2014). A key to the males of Metalype species of the world is provided.

5.
Artigo em Inglês | MEDLINE | ID: mdl-27481793

RESUMO

DNA barcoding was intended as a means to provide species-level identifications through associating DNA sequences from unknown specimens to those from curated reference specimens. Although barcodes were not designed for phylogenetics, they can be beneficial to the completion of the Tree of Life. The barcode database for Trichoptera is relatively comprehensive, with data from every family, approximately two-thirds of the genera, and one-third of the described species. Most Trichoptera, as with most of life's species, have never been subjected to any formal phylogenetic analysis. Here, we present a phylogeny with over 16 000 unique haplotypes as a working hypothesis that can be updated as our estimates improve. We suggest a strategy of implementing constrained tree searches, which allow larger datasets to dictate the backbone phylogeny, while the barcode data fill out the tips of the tree. We also discuss how this phylogeny could be used to focus taxonomic attention on ambiguous species boundaries and hidden biodiversity. We suggest that systematists continue to differentiate between 'Barcode Index Numbers' (BINs) and 'species' that have been formally described. Each has utility, but they are not synonyms. We highlight examples of integrative taxonomy, using both barcodes and morphology for species description.This article is part of the themed issue 'From DNA barcodes to biomes'.


Assuntos
Código de Barras de DNA Taxonômico , Insetos/classificação , Filogenia , Animais , Biodiversidade , Haplótipos , Insetos/genética , Análise de Sequência de DNA
6.
Zootaxa ; 4136(1): 181-7, 2016 Jul 05.
Artigo em Inglês | MEDLINE | ID: mdl-27395712

RESUMO

Three new species of the genus Lepidostoma Rambur are described and illustrated from the Indian Himalaya: Lepidostoma trilobatum sp. nov., L. lidderwatense sp. nov., and L. sainii sp. nov., all belonging to the Lepidostoma ferox Branch. With these new additions, the genus Lepidostoma is now represented by 50 species in India and over 450 species globally.


Assuntos
Insetos/classificação , Distribuição Animal , Estruturas Animais/anatomia & histologia , Estruturas Animais/crescimento & desenvolvimento , Animais , Tamanho Corporal , Feminino , Índia , Insetos/anatomia & histologia , Insetos/crescimento & desenvolvimento , Masculino , Tamanho do Órgão
7.
Zootaxa ; 4097(2): 203-19, 2016 Mar 30.
Artigo em Inglês | MEDLINE | ID: mdl-27394538

RESUMO

Five new species of hydroptilids in four genera are described from China, including three new species in Hydroptilinae: Agraylea dactylina n. sp., Allotrichia rhynchophyllum n. sp., and Microptila hamatilis n. sp.; and two new species in Stactobiinae: Stactobiella mutica n. sp. and Stactobiella parallelica n. sp. New records are given for Stactobiella biramosa Martynov 1929 and Pseudoxyethira thingana (Oláh) 1989. Genera Agraylea, Allotrichia, Stactobiella, and Microptila are new to Chinese fauna.


Assuntos
Insetos/classificação , Distribuição Animal , Estruturas Animais/anatomia & histologia , Estruturas Animais/crescimento & desenvolvimento , Animais , Tamanho Corporal , China , Feminino , Insetos/anatomia & histologia , Insetos/crescimento & desenvolvimento , Masculino , Tamanho do Órgão
8.
Zootaxa ; 3846(2): 273-84, 2014 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-25112252

RESUMO

Currently, 8 species of the genus Nyctiophylax Brauer are known from China. Examination of material collected from Guangdong, Guangxi, Jiangxi and Sichuan Provinces during 2004-2005 has revealed 4 new species and 2 new records of this genus, bringing the number of Chinese Nyctiophylax species to 14. Newly described species include: Nyctiophylax (Paranyctiophylax) crinalis n. sp., N. (P.) dactylatus n. sp., N. (P.) orbicularis n. sp., and N. (P.) macrorrhinus n. sp. Nyctiophylax (Paranyctiophylax) sagax Mey and N. (N.) amphonion Malicky & Chantaramongkol are newly recorded for the Chinese fauna, which are re-illustrated and re-described for clear comparisons. The additional collection sites for the previously described species are provided. 


Assuntos
Insetos/classificação , Animais , China , Feminino , Genitália/anatomia & histologia , Insetos/anatomia & histologia , Masculino
9.
Zootaxa ; 3794: 201-21, 2014 May 06.
Artigo em Inglês | MEDLINE | ID: mdl-24870319

RESUMO

The genus Palaeagapetus Ulmer (Trichoptera, Hydroptilidae, Ptilocolepinae) is revised in North America. Descriptions of the western species, P. nearcticus Banks 1938, are provided with the first descriptions of the female, pupa, larva, egg and case and with notes on food, habitat and annual life cycle. The male and female of the eastern species, P. celsus Ross 1936, are described or redescribed with some ecological notes. Distributions of the two species are summarized.


Assuntos
Insetos/classificação , Animais , Ecossistema , Feminino , Insetos/anatomia & histologia , Insetos/crescimento & desenvolvimento , Larva/anatomia & histologia , Masculino , América do Norte , Pupa/anatomia & histologia
10.
Zootaxa ; 3613: 445-54, 2013 Feb 13.
Artigo em Inglês | MEDLINE | ID: mdl-24698929

RESUMO

Five new species of the genus Cheumatopsyche (Trichoptera: Hydropsychidae) from the Phetchabun Mountains, Thailand, are described and illustrated. The national parks and wildlife sanctuaries in the Phetchabun Mountains are recognized as areas with a high density of endemic species deserving protection. Four new species of Cheumatopsyche (C. recta, C. diversa, C. triangula, and C. tongto) have been found in Phu Khieo Wildlife Sanctuary, Phu Kradueng National Park and Thung Salaeng Luang National Park; a fifth new species (C. cava) has been found in Phu Kradueng National Park. Describing hydropsychid species is important not only to study diversity and distribution but also to facilitate eventual descriptions of larvae for use in freshwater biomonitoring programs to detect pollution.


Assuntos
Insetos/anatomia & histologia , Insetos/classificação , Animais , Masculino , Tailândia
11.
Zookeys ; (169): 39-59, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-22371685

RESUMO

Four new species of genus Plectrocnemia and 4 new species of genus Nyctiophylax are described, namely: Plectrocnemia verticalissp. n.; Plectrocnemia acuminatasp. n.; Plectrocnemia cryptoparameresp. n.; Plectrocnemia qianshanensissp. n.; Nyctiophylax (Nyctiophylax) senticosussp. n.; Nyctiophylax (Paranyctiophylax) gracilissp. n.; Nyctiophylax (Paranyctiophylax) pungenssp. n.; and Nyctiophylax (Paranyctiophylax) auriculatussp. n.

12.
Q Rev Biol ; 85(3): 319-40, 2010 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-20919633

RESUMO

Assessing the biodiversity of macroinvertebrate fauna in freshwater ecosystems is an essential component of both basic ecological inquiry and applied ecological assessments. Aspects of taxonomic diversity and composition in freshwater communities are widely used to quantify water quality and measure the efficacy of remediation and restoration efforts. The accuracy and precision of biodiversity assessments based on standard morphological identifications are often limited by taxonomic resolution and sample size. Morphologically based identifications are laborious and costly, significantly constraining the sample sizes that can be processed. We suggest that the development of an assay platform based on DNA signatures will increase the precision and ease of quantifying biodiversity in freshwater ecosystems. Advances in this area will be particularly relevant for benthic and planktonic invertebrates, which are often monitored by regulatory agencies. Adopting a genetic assessment platform will alleviate some of the current limitations to biodiversity assessment strategies. We discuss the benefits and challenges associated with DNA-based assessments and the methods that are currently available. As recent advances in microarray and next-generation sequencing technologies will facilitate a transition to DNA-based assessment approaches, future research efforts should focus on methods for data collection, assay platform development, establishing linkages between DNA signatures and well-resolved taxonomies, and bioinformatics.


Assuntos
DNA/genética , Ecossistema , Animais , Biodiversidade , Biologia Computacional , Água Doce , Invertebrados/genética , Biologia Marinha , Reação em Cadeia da Polimerase
13.
Integr Environ Assess Manag ; 4(4): 431-42, 2008 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-18605810

RESUMO

The impacts of land disturbance on streams have been studied extensively, but a quantitative mechanism of stream degradation is still lacking. Small changes in land use result in changes in physical and chemical characteristics in the stream, which significantly alter biotic integrity. The objective of this study was to quantify the mechanisms of aquatic ecosystem degradation in streams impacted by watershed urbanization. By quantifying the development level and the changes in the physical parameters of receiving streams, the effects of land use change can be illustrated in a conceptual model and evaluated using a traditional ecological risk assessment framework. Three 1st-order streams draining catchments undergoing varying stages of land development were examined in the upper Piedmont physiographic province of South Carolina, U.S.A. A disturbance index was developed to quantify the changes in land use on a monthly basis. This normalized disturbance index (NDI) was quantitatively linked to an increase in the percentage of impervious cover, stormwater runoff, storm-event total suspended solid (TSS) concentrations, and the North Carolina biotic index (NCBI). The NDI was inversely related to a decline in habitat, median bed-sediment particle size, and benthic index of biotic integrity (BIBI). Unlike the percentage of impervious cover, the NDI facilitated the development of strategies for multiple scales of regulation. Predictive multivariate regressions were developed for storm-event TSS concentrations, the BIBI, and the NCBI. These regressions can be used to develop improved regulations for the effects of development and can lead to better implementation of best management practices, improved monitoring of land use change, and more sustainable development.


Assuntos
Ecossistema , Monitoramento Ambiental/métodos , Água Doce/análise , Água Doce/química , Geografia , Sedimentos Geológicos/análise , Sedimentos Geológicos/química , Medição de Risco , Rios , South Carolina , Movimentos da Água
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