Trigona

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Claus Rasmussen - One of the best experts on this subject based on the ideXlab platform.

  • the identity and neotype of Trigona laeviceps smith hymenoptera apidae
    Journal of the Kansas Entomological Society, 2010
    Co-Authors: Claus Rasmussen, Charles D Michener
    Abstract:

    Abstract Recognizable type material of Trigona laeviceps Smith, 1857, has not been found. A neotype from the correct type locality, Singapore, is here designated. It is a specimen of the smaller form commonly included in T. laeviceps, and is the same species as the false holotype previously recognized. Trigona fuscobalteata Cameron, 1908, is not a synonym of T. laeviceps as has been proposed. The name T. valdezi Cockerell, 1918, or possibly T. testaceitarsis Cameron, 1901, may be appropriate for a larger form commonly included in T. laeviceps. A lectotype and two paralectotypes are designated for T. testaceitarsis.

  • catalog of the indo malayan australasian stingless bees hymenoptera apidae meliponini
    Zootaxa, 2008
    Co-Authors: Claus Rasmussen
    Abstract:

    This catalog of the published literature on stingless bees from the Indo-Malayan/Australasian region was compiled from 520 references and deals with 129 proposed names for species-group taxa of which 89 are considered currently valid. Information is summarized on organisms associated with stingless bee colonies as well as the 225 plants from which the bees have been reported to forage. Lectotypes are designated for Trigona ornata described by Rayment and the following species described by Friese: Trigona anamitica, T. australis, T. borneensis, T. flaviventris, T. keyensis, T. luteiventris, T. pygmaea, T. reepeni, T. sericea, and T. versicolor.

  • a molecular phylogeny and the evolution of nest architecture and behavior in Trigona s s hymenoptera apidae meliponini
    Apidologie, 2008
    Co-Authors: Claus Rasmussen, Joao Maria Franco De Camargo
    Abstract:

    Stingless bees exhibit extraordinary variation in nest architecture within and among species. To test for phylogenetic association of behavioral traits for species of the Neotropical stingless bee genus Trigona s.s., a phylogenetic hypothesis was generated by combining sequence data of 24 taxa from one mitochondrial (16S rRNA) and four nuclear gene fragments (long-wavelength rhodopsin copy 1 (opsin), elongation factor-1α copy F2, arginine kinase, and 28S rRNA). Fifteen characteristics of the nest architecture were coded and tested for phylogenetic association. Several characters have significant phylogenetic signal, including type of nesting substrate, nest construction material, and hemipterophily, the tending of hemipteroid insects in exchange for sugar excretions. Phylogenetic independent habits encountered in Trigona s.s. include coprophily and necrophagy.

  • a molecular phylogeny of the old world stingless bees hymenoptera apidae meliponini and the non monophyly of the large genus Trigona
    Systematic Entomology, 2007
    Co-Authors: Claus Rasmussen, Sydney A Cameron
    Abstract:

    We examined the inter- and infrageneric relationships of Old World Meliponini with a near-complete sampling of supra-specific taxa. DNA sequences for the taxa were collected from four genes (mitochondrial 16S rRNA, nuclear long-wavelength rhodopsin copy 1 (opsin), elongation factor-1a copy F2 and arginine kinase). Additional sampling of New World taxa indicated that Trigona sensu lato is not monophyletic: Trigona from the Indo-Malayan/Australasian Regions forms a large clade distantly related to the Neotropical Trigona .A separate clade comprises the Afrotropical meliponines, and includes the 'minute' species found in the Afrotropical, Indo-Malayan and Australasian Regions. The Neotropical genus Melipona, by contrast with previous investigations, is not the sister lineage to the remaining stingless bees, but falls within the strongly supported Neotropical clade. These results constitute the framework for a revised classifica- tion and ongoing biological investigations of Meliponini. A single taxonomic change, HeteroTrigona bakeri stat.n., is proposed on the basis of sequence divergence.

Sydney A Cameron - One of the best experts on this subject based on the ideXlab platform.

  • a molecular phylogeny of the old world stingless bees hymenoptera apidae meliponini and the non monophyly of the large genus Trigona
    Systematic Entomology, 2007
    Co-Authors: Claus Rasmussen, Sydney A Cameron
    Abstract:

    We examined the inter- and infrageneric relationships of Old World Meliponini with a near-complete sampling of supra-specific taxa. DNA sequences for the taxa were collected from four genes (mitochondrial 16S rRNA, nuclear long-wavelength rhodopsin copy 1 (opsin), elongation factor-1a copy F2 and arginine kinase). Additional sampling of New World taxa indicated that Trigona sensu lato is not monophyletic: Trigona from the Indo-Malayan/Australasian Regions forms a large clade distantly related to the Neotropical Trigona .A separate clade comprises the Afrotropical meliponines, and includes the 'minute' species found in the Afrotropical, Indo-Malayan and Australasian Regions. The Neotropical genus Melipona, by contrast with previous investigations, is not the sister lineage to the remaining stingless bees, but falls within the strongly supported Neotropical clade. These results constitute the framework for a revised classifica- tion and ongoing biological investigations of Meliponini. A single taxonomic change, HeteroTrigona bakeri stat.n., is proposed on the basis of sequence divergence.

Ahmad Endang Zainal Hasan - One of the best experts on this subject based on the ideXlab platform.

  • antibacterial activity of propolis produced by Trigona spp against campylobacter spp
    Hayati Journal of Biosciences, 2008
    Co-Authors: Amin Fatoni, Made I Artika, Ahmad Endang Zainal Hasan
    Abstract:

    Propolis is believed to have antimicrobial, anti-inflammatory and immunostimulating activities. The objective of this study was to investigate the antibacterial activity of ethanol extract propolis (EEP) of Trigona spp. from Bukittinggi West Sumatera against Campylobacter spp. Antibacterial activity of the EEP was measured by disc diffusion method. The compound groups of the propolis were also analyzed on the existence of alkaloids, flavonoids, saphonins, tannins, steroids, and terpenoids. This study revealed that the EEP of Trigona spp. shows an antibacterial activity on Campylobacter spp. The compound groups detected in the EEP were flavonoids and tannins, suggesting that the antibacterial activity of propolis of Trigona spp. may be due to these compounds. Key words: Trigona spp., antibacterial activity, Campylobacter spp

Ingolf Lamprecht - One of the best experts on this subject based on the ideXlab platform.

Wardaniati Isna - One of the best experts on this subject based on the ideXlab platform.

  • UJI AKTIVITAS ANTIOKSIDAN EKSTRAK ETANOL PROPOLIS LEBAH Trigona (Trigona itama) MENGGUNAKAN METODE DPPH
    'LPPM Universitas Abdurrab', 2020
    Co-Authors: Wardaniati Isna, Yanti Rahma
    Abstract:

    Propolis lebah Trigona (Trigona itama) merupakan bahan alami dari resin atau getah berbagai tanaman yang dikumpulkan lebah. Penelitian ini bertujuan untuk mengetahui aktivitas antioksidan ekstrak etanol propolis lebah Trigona (Trigona itama). Penentuan aktivitas antioksidan dilakukan menggunakan metode DPPH dengan asam askorbat sebagai pembanding. Alat yang digunakan adalah microplate reader dengan panjang gelombang maksimum pengukuran adalah 520 nm. Parameter yang digunakan untuk mengetahui aktivitas antioksidan adalah (Inhibition Concentration). Berdasarkan penelitian ini, sampel ekstrak etanol propolis lebah Trigona (Trigona itama) memiliki nilai lebih besar dibandingkan asam askorbat sehingga sampel menunjukkan aktivitas antioksidan kategori sedang dengan nilai sampel sebesar 105,11 ppm dan nilai pembanding sebesar 7,24 ppm sebagai aktivitas antioksidan kategori sangat aktif

  • UJI AKTIVITAS ANTIOKSIDAN EKSTRAK ETANOL BEE POLLEN LEBAH Trigona (Trigona itama)
    'LPPM Universitas Abdurrab', 2019
    Co-Authors: Wardaniati Isna, Taibah Surhiyatun
    Abstract:

    Bee pollen memiliki kandungan bahan kimia yang kompleks dan beragam membuat bee pollen mempunyai khasiat yang bermacam-macam, salah satunya adalah sebagai antioksidan. Bee pollen merupakan salah satu bahan yang mengandung antioksidan alami berupa flavonoid, polifenol dan karotenoid. Kandungan Antioksidan berfungsi sebagai menetralisasi radikal bebas, sehingga tubuh terlindungi dari berbagai macam penyakit degeneratif dan kanker. Adapun tujuan dari penelitian ini adalah untuk mengetahui aktivitas antioksidan (AA) ekstrak etanol bee pollen lebah Trigona (Trigona itama) menggunakan metode β-karoten bleaching secara spektrofotometri Uv-Vis. Hasil penelitian menunjukkan bahwa ektrak etanol bee pollen lebah Trigona (Trigona itama) memiliki   nilai   aktivitas antioksidan (AA) sebesar 66,2% (intermediate) sedangkan asam askorbat sebagai kontrol positif sebesar 97,7% (antioksidan kuat). Dari hasil penelitian dapat disimpulkan bahwa ektrak etanol bee pollen lebah Trigona (Trigona itama) memiliki khasiat sebagai antioksidan dengan golongan aktivitas antioksidan (AA) intermediet (sedang)

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