Spider venom peptides Ht1a and Gg1a are toxic to honeybee parasite Varroa destructor by topical application

Posted by
  Spider venom peptides Ht1a and Gg1a are toxic to honeybee parasite Varroa destructor by topical application Abstract Global food supply strongly depends on honeybee pollination services, which are threatened by insecticides and pests such as parasitic Varroa destructor mites. Chemical varroacides/acaricides are hampered by resistance development, necessitating the development of sustainable and environmentally friendly alternatives, with arthropod venom peptides being considered promising sources of acaricidal toxins. With only a few acaricidal venom peptides being reported, we performed a systematic topical screening of 50 arthropod venoms against V. destructor , with 78% of the venoms causing 100% mortality after 24 h. Deconvolution of the venoms from the Tasmanian cave spider Hickmania troglodytes and the Giant Japanese funnel-web spider Gigathele gigas led to identification of the varroacidal peptides Ht1a and Gg1a. Topical application of Ht1a and Gg1a reduced varroa mite ...

Notes on Anqasha picta (Pocock, 1903) and description of a new species of Anqasha from Peru (Araneae, Theraphosidae, Theraphosinae)

Posted by

 


Notes on Anqasha picta (Pocock, 1903) and description of a new species of Anqasha from Peru (Araneae, Theraphosidae, Theraphosinae)

Abstract

The monotypic Peruvian genus Anqasha with type species Anqasha picta (Pocock 1903) is revised. A female of A. picta from the type locality of Caraz is herein des-cribed for the first time. The recently described females of A. picta coming from Recuay are transferred to the new taxon, which is herein described, diagnosed, and illustrated. Males of A. minaperinensis sp. nov. differ from that of A. picta in the shape of retrolateral branch of subapical apophyses on male tibia I, which is apically flattened and having three short spines. Females of A. minaperinensis sp. nov. differ from A. picta in the shape of seminal receptacles.

Resumen

Se revisa el género monotípico peruano Anqasha, con la espécie tipo Anqasha picta(Pocock 1903). Se describe por primera vez una hembra de A. picta de la localidad de tipo en Caraz. Las hembras recientemente descritas de A. picta procedentes de Recuay son transferidas al nuevo taxon, el cual se describe, diagnostica e illustra aquí.Los machos de A. minaperinensis sp. nov. se differencían de A. picta en la forma de la rama retrolateral de la apófísis subapical en la tibia I del macho, la cual está aplanada apicalmente y llevando tres espinas cortas. Las hembras de A. minaperi-nensis sp. nov. se differencían de A. picta en la forma de los receptaculos seminales.

Kaderka, Radan. 2023. «Notas De Anqasha Picta (Pocock, 1903) Y descripción De Una Especie Nueva De Anqasha De Perú (Araneae, Theraphosidae, Theraphosinae)». Revista Peruana De Biología 30 (4):e25154. https://doi.org/10.15381/rpb.v30i4.25154