A new endemic genus of tarantula (Theraphosidae, Ischnocolinae) from southern Peru

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  A new endemic genus of tarantula (Theraphosidae, Ischnocolinae) from southern Peru We propose establishing a new genus of mygalomorph spiders in the family Theraphosidae Thorell, 1869, from the Province Calca, Department of Cusco, Peru. The monotypic genus Allpamayu n. gen. with its type species Allpamayu suyuwixsa n. gen, n. sp. is described. Allpamayu n. gen. differs from the known Ischnocolinae Simon, 1892 by the following unique combination of characters: abdomen with stripes, labium with a low number of cuspules, and clavate trichobothria on tarsi forming two parallel rows along half of tarsus length. Additional characters are palpal bulb of males with two keels, metatarsal ventral tumescence on the first pair of legs, cymbium with long erected setae, spermathecae of females with large subquadrate receptacles and a short wide duct oriented laterally and pointing upwards carrying two to three rounded lobes. BERATZ M., FERRETTI N. E., CHAPARRO J. C., OCHOA J. A., ALLEN J. P. ...

Two new species of the Cybaeus hiroshimaensis-group (Araneae: Cybaeidae) from the northern Hida Mountains, Japan

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Two new species of the Cybaeus hiroshimaensis-group (Araneae: Cybaeidae) from the northern Hida Mountains, Japan

Abstract

Two small-sized species of the spider genus Cybaeus L. Koch, 1868, C. pycnothrix sp. nov. and C. tateyamensis sp. nov., are described based on both sexes from the Tateyama Mountain Range in the Hida Mountains, central Honshu, Japan. Phylogenetic analyses using nuclear internal transcribed spacer 1, 28S rRNA, and histone H3 markers revealed that the two new species are members of the monophyletic Japanese Cybaeus hiroshimaensis-group. Both new species conform to the morphological diagnosis of the hiroshimaensis-group — small body size and a short, thick male palp — and build two-opening retreats, indicating that retreat architecture in the group varies and encompasses both two- and three-opening forms.


Nakano, T., Ogawa, G., Mori, K., Hatanaka, Y., Koike, N., & Sugawara, Y. (2025). Two new species of the Cybaeus hiroshimaensis-group (Araneae: Cybaeidae) from the northern Hida Mountains, Japan. Soil Organisms, 97(3), 317–326. https://doi.org/10.25674/461