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Updated: Jun 29, 2025

Microdissection of Black Widow Spider Silk-producing Glands
Published on: January 11, 2011
A new monotypic genus of cobweb spiders from the Russian Far East (Araneae, Theridiidae)
Yuri M Marusik1,2,3, Kirill Y Eskov4
1Institute of Biological Problems of the North, Far Eastern Branch, Russian Academy of Sciences, Portovaya Str., 18, Magadan, 68500, Russia Institute of Biological Problems of the North, Far Eastern Branch, Russian Academy of Sciences Magadan Russia.
Abstract:
A new theridiid spider, Knoflachiakurilensisgen. et sp. nov., is described from the Kuril Islands (Kunashir). The new genus belongs to the 'Anelosimus clade (clade 24)' of Agnarsson (2004). A pair of raised, fused setal sockets on the cheliceral promargin adjacent to the fang base was found to be another synapomorphy of all the 'distal theridiids' (the 'elongated central claw clade (clade 33)': argyrodins, 'Anelosimus clade' and theridiins). Knoflachiakurilensissp. nov. demonstrates a male polymorphism similar to some Anelosimus Simon, 1891 species (e.g., A.studiosus (Hentz, 1850)).
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