The Experts below are selected from a list of 915 Experts worldwide ranked by ideXlab platform

André Nelc - One of the best experts on this subject based on the ideXlab platform.

  • A possible true Mesozoic Gomphidae s. str. from the mid-Cretaceous Burmese amber (Odonata: Anisoptera)
    Cretaceous Research, 2019
    Co-Authors: Diying Huang, André Nelc
    Abstract:

    Gunterbechlya pumilio gen. et sp. nov., first putative Mesozoic Gomphidae sensu stricto, is described from the mid-Cretaceous Burmese amber. It is remarkable in its reduced venation with quadrangular discoidal triangles, only found in the extant gomphid genera Lestinogomphus and Archaeogomphus, the 'libelluloid' Cordulephyidae and the Libellulidae: 'Tetrathemistinae'. All these taxa are small dragonflies with reduced venation. Possibly the particular quadrangular discoidal triangles of these insects are related to their small sizes. The positions of some Mesozoic taxa currently attributed to the Gomphidae are discussed and none can be considered as genuine representatives of this family.

J. Belle - One of the best experts on this subject based on the ideXlab platform.

  • Higher classification of the South-American Gomphidae (Odonata)
    2016
    Co-Authors: J. Belle, Key Gomphidae, South America
    Abstract:

    The adults and larvae of the South-American Gomphidae are classified. Keys to the subfamilies an

  • Higher classification of the South-American Gomphidae (Odonata)
    Zoologische Mededelingen, 1996
    Co-Authors: J. Belle
    Abstract:

    The adults and larvae of the South-American Gomphidae are classified. Keys to the subfamilies and tribes are constructed followed by tribal descriptions and descriptive notes. The existing classification is revised as follows: - Octogomphinae comb. nov.: Hemigomphini (Neogomphus, Praeviogomphus), Anomalophlebiini trib. nov. (Anomalophlebia); - Onychogomphinae: Onychogomphini (Erpetogomphus); - Epigomphinae: Archaeogomphini (Archaeogomphus), Agriogomphini trib. nov. (Agriogomphus, Brasiliogomphus, Ebegomphus), Cyanogomphini comb. nov. (Cyanogomphus, Tibiagomphus), Epigomphini (Epigomphus); - Ictinogomphinae comb. nov.: Ictinogomphini comb. nov. (Cacoides, Melanocacus); Zonophorinae: Zonophorini (Mitragomphus, Zonophora); - Gomphoidinae comb. nov.: Aphyllini trib. nov. (Aphylla, Phyllocycla), Diaphlebiini trib. nov. (Desmogomphus, Diaphlebia), Gomphoidini comb. nov. (Gomphoides, Idiogomphoides, Phyllogomphoides), Peruviogomphini trib. nov. (Peruviogomphus), Progomphini (Progomphus).

  • On the female sex of some elusive South­American Gomphidae with the descriptions of three new genera and four new species (Odonata)
    Zoologische Mededelingen, 1995
    Co-Authors: J. Belle
    Abstract:

    Females of some South-American Gomphidae are recorded. Anomalophlebia nitida gen. nov. et spec. nov. ( ♀ holotype: Venezuela, State of Bolivar, Los Pijiguasos), Praeviogomphus proprius gen. nov. et spec. nov. ( ♀ holotype: Brazil, State of Rio de Janeiro, Itatiaya), Brasiliogomphus uniseries gen. nov. et spec. nov. ( ♀ holotype: Brazil, State of Sao Paulo, Lins) and Idiogomphoides emmeli spec. nov. ( ♀ holotype: Brazil, State of Rondonia, Rio Pardo) are described and illustrated. A syntype female of Agriogomphus sylvicola Selys is designated as lectotype. The female of Diaphlebia nexans Calvert and Gomphoides perdita (Forster) are described for the first time while two females pertaining to unknown species of Progomphus and Aphylla are described under spec. indet. Intraspecific variations of three other females are also discussed.

Takako Watanabe - One of the best experts on this subject based on the ideXlab platform.

  • Insetos aquáticos do açude São José dos Cordeiros (semi-árido paraibano) com ênfase em Chironomidae
    Entomología y Vectores, 2005
    Co-Authors: Luciano De Brito-junior, Francisco José Pegado Abílio, Takako Watanabe
    Abstract:

    With the aim of studing the composition of Chironomidae fauna and other aquatic insects of Sao Jose dos Cordeiros dam, in Sao Jose dos Cordeiros -PB (07o 23'S e 36o 49'W), bimonthly qualitative samples were colected between July/1998 and July/1999. The insect fauna was sampled randomly with one hand net of 0.50 mm mesh size. The material collected was fixed in formol 10%, the triagem was made through illuminated tray and for identification was used a stereomicroscope. Some physical and chemical water parameters were determined to correlated with biological data. Aedokritus was the dominating and more frequent genera of Chironomidae in mud of dam, showing the maximum abundance of 94.47% in January/99. On the other hand Dicrotendipes sp3 was only found in July/98 (12.50% of the total aquatic insects fauna). Beyond of Chironomidae, the occurrence of Ceratopogonidae (Diptera), Gomphidae (Odonata), Coleoptera and Campsurus sp. (Polymitarcyidae, Ephemeroptera) was observed. The abundance of all Chironomidae genera was significantly corraleted with the organic matter of sediment. During the period of September/98 to January/99 was observed an increase in the percentual organic matter in sediment that corresponded to the increase in the abundance of Aedokritus sp. and a consequently decrease in the abundance of Gomphidae. Therefore, changing in physical and chemical conditions of water mainly associated to the increase in organic matter may produce a consequently decrease in the biomass of the aquatic insects.

  • Insetos aquáticos do açude São José dos Cordeiros (semi-árido paraibano) com ênfase em Chironomidae
    Entomología y Vectores, 2005
    Co-Authors: Luciano De Brito-junior, Francisco José Pegado Abílio, Takako Watanabe
    Abstract:

    With the aim of studing the composition of Chironomidae fauna and other aquatic insects of Sao Jose dos Cordeiros dam, in Sao Jose dos Cordeiros -PB (07o 23'S e 36o 49'W), bimonthly qualitative samples were colected between July/1998 and July/1999. The insect fauna was sampled randomly with one hand net of 0.50 mm mesh size. The material collected was fixed in formol 10%, the triagem was made through illuminated tray and for identification was used a stereomicroscope. Some physical and chemical water parameters were determined to correlated with biological data. Aedokritus was the dominating and more frequent genera of Chironomidae in mud of dam, showing the maximum abundance of 94.47% in January/99. On the other hand Dicrotendipes sp3 was only found in July/98 (12.50% of the total aquatic insects fauna). Beyond of Chironomidae, the occurrence of Ceratopogonidae (Diptera), Gomphidae (Odonata), Coleoptera and Campsurus sp. (Polymitarcyidae, Ephemeroptera) was observed. The abundance of all Chironomidae genera was significantly corraleted with the organic matter of sediment. During the period of September/98 to January/99 was observed an increase in the percentual organic matter in sediment that corresponded to the increase in the abundance of Aedokritus sp. and a consequently decrease in the abundance of Gomphidae. Therefore, changing in physical and chemical conditions of water mainly associated to the increase in organic matter may produce a consequently decrease in the biomass of the aquatic insects.

Diying Huang - One of the best experts on this subject based on the ideXlab platform.

  • A possible true Mesozoic Gomphidae s. str. from the mid-Cretaceous Burmese amber (Odonata: Anisoptera)
    Cretaceous Research, 2019
    Co-Authors: Diying Huang, André Nelc
    Abstract:

    Gunterbechlya pumilio gen. et sp. nov., first putative Mesozoic Gomphidae sensu stricto, is described from the mid-Cretaceous Burmese amber. It is remarkable in its reduced venation with quadrangular discoidal triangles, only found in the extant gomphid genera Lestinogomphus and Archaeogomphus, the 'libelluloid' Cordulephyidae and the Libellulidae: 'Tetrathemistinae'. All these taxa are small dragonflies with reduced venation. Possibly the particular quadrangular discoidal triangles of these insects are related to their small sizes. The positions of some Mesozoic taxa currently attributed to the Gomphidae are discussed and none can be considered as genuine representatives of this family.

Snp Yadav Deen - One of the best experts on this subject based on the ideXlab platform.

  • Community structure of odonata naiads of a fish farming pond in costal area of West Bengal, India
    Journal of Pharmacognosy and Phytochemistry, 2019
    Co-Authors: Anindya Pattanayak, Priti Ranjan Pahari, Niwas Dubey Azad, Snp Yadav Deen
    Abstract:

    Community structure of Odonata larvae was investigated in a fish farming pond at Tamluk located in the coastal belt of West Bengal, India. In total 12 species under 3 families and 2 suborder were recorded during study period. Suborders Anisoptera was the most dominant (76.16%) group. Family Gomphidae had the lowest abundance (1.93%) and Family libellulidae had highest abundance (76.66%). All the species were not found throughout the year. Some species such as Pantala flavescens (Fabricius, 1798) of family Libellulidae was found only in rainy months thus behaving as species associated with rains. Species diversity, dominance index, equitability index and evenness indices during study period, suggest a moderately stressed and disturbed environment.

  • Diversity and abundance of Odonata larvae in a fresh water lentic system of Purba Medinipur District, West Bengal, India
    Journal of Pharmacognosy and Phytochemistry, 2019
    Co-Authors: Anindya Pattanayak, Priti Ranjan Pahari, Snp Yadav Deen
    Abstract:

    In total 19 species of Odonata larva have been recorded from a weed infested manmade Freshwater large lentic system near Tamluk, West Bengal (22017’52.56”N, 87055’16.72”E), India. Family Libellulidae was numerically the most abundant group comprising 66.04 % of the total Odonata larva followed by Family Coenagrionidae (31.92%) and Gomphidae (2.04%) respectively. Family Libellulidae represented by 12 species while Coenagrionidae represented by only 6 species and Gomphidae was represented by only one species. Urothemis and Rhodothemis were largest and lowest number of individuals recorded respectively. The water quality was fairly good during the 11 month study period of 2017-18. Various diversity indices were calculated in different seasons and the result shows maximum diversity and abundance during post-monsoon and minimum was in pre-monsoon. Diversity and evenness indices were fluctuated during study period due to seasonal changes of environmental conditions.