Hadrotarsinae Thorell, 1881 is a subfamily of cobweb spiders (Theridiidae) distributed worldwide and customarily thought to be specialised ant predators. The taxonomy of Hadrotarsinae is problematic on account of unclear delimitation of genera, resulting in probably misplacement of many species. Within the present paper, we offer taxonomic amendments for Emertonella Bryant, 1945, Euryopis Menge, 1868, and Phycosoma O. Pickard-Cambridge, 1880 primarily based on Chinese language supplies. Examination of Eu. deplanata Schenkel, 1936 and Em. taczanowskii (Keyserling, 1886) helps Yoshida’s idea of Emertonella and supplies extra morphological proof for refining the generic prognosis. Accordingly, Eu. deplanata is formally transferred, with 30 extra species, from Euryopis to Emertonella, and Em. taczanowskii is redescribed. Moreover, Physcoa mingyaoi (Yin, 2012), comb. nov. ex. Euryopis and Lasaeola stigmosum (Yin, 2012), comb. nov. ex. Phycosoma are transferred, and one new synonym is proposed, Phycosoma amamiense (Yoshida, 1985), syn. nov. = Phycosoma japonicum (Yoshida, 1985). Lastly, the primary descriptions of the males of Em. deplanata (Schenkel, 1936), comb. nov. and Phycosoma ripa (Zhu, 1998) are offered.
Hu C, Zhang H, Jiang M, Liu F (2026) Re-delimitation of the genus Emertonella (Araneae, Theridiidae, Hadrotarsinae) and taxonomic notes on Euryopis and Phycosoma from China. ZooKeys 1270: 285-305. https://doi.org/10.3897/zookeys.1270.175743
