A new species of Dolomedes Latreille, 1804 (Araneae: Dolomedidae) from the island of New Guinea

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  A new species of Dolomedes Latreille, 1804 (Araneae: Dolomedidae) from the island of New Guinea Abstract A new species, Dolomedes afi sp. n., is diagnosed and described from New Guinea Island (Papua New Guinea) based on both sexes. The new species is similar to the Australian species D. alexandri Raven & Hebron, 2018, D. vicque Raven & Hebron, 2018 and D. wollemi Raven & Hebron, 2018, but differs from them in the structure of the copulatory organs. The new species exhibits pronounced sexual dimorphism in body coloration. A detailed description and digital photographs are provided. The collecting localities of Dolomedes species in New Guinea are mapped. Fomichev, A. A., & Omelko, M. M. (2026). A new species of Dolomedes Latreille, 1804 (Araneae: Dolomedidae) from the island of New Guinea.  Acta Biologica Sibirica ,  12 , 355-365. https://doi.org/10.5281/zenodo.19563050

Different, but still the same: integrative taxonomy confirms a new species of Eresus Walckenaer, 1805 (Araneae, Eresidae) from the South Caucasus

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Different, but still the same: integrative taxonomy confirms a new species of Eresus Walckenaer, 1805 (Araneae, Eresidae) from the South Caucasus

Abstract

This study represents the first step toward a systematic revision of the velvet spider genus Eresus Walckenaer, 1805 in the Caucasus. Here, Eresus transcaucasicus sp. nov. is described using an integrative approach, based on male specimens collected from the South Caucasus. The species was previously reported as E. kollari Rossi, 1846 from Armenia and as Eresus sp. from Georgia. Intraspecific variations in both coloration patterns and conductor shape, which have been rarely documented in this genus, are illustrated. The validity of previous records of E. kollari in the region is discussed.

Zamani A, Seropian A, Zarikian N, Bulbulashvili N, Szűts T (2025) Different, but still the same: integrative taxonomy confirms a new species of Eresus Walckenaer, 1805 (Araneae, Eresidae) from the South Caucasus. ZooKeys 1249: 1-13. https://doi.org/10.3897/zookeys.1249.159081