Abstract
The genus Phycosoma O. Pickard-Cambridge, 1880 (Hadrotarsinae Thorell, 1881, Theridiidae) has a cosmopolitan distribution. Over the past three decades, more than 20 species have been transferred to Phycosoma from Dipoena Thorell, 1869, 16 of which are from China. Consequently, the present study continues to focus on both genera, aiming to morphologically revise those Chinese species currently placed in Dipoena but requiring transfer to Phycosoma. In this study, a new species of Phycosoma is described from Yunnan, China: P. spinula sp. nov. (♂♀). In addition, three new combinations are proposed, all transferred from the genus Dipoena: P. gui (Zhu, 1998) comb. nov., P. linzhiense (Hu, 2001) comb. nov. and P. redunca (Zhu, 1998) comb. nov.. Upon completion of this study, no Chinese species currently assigned to Dipoena are considered to require transfer to Phycosoma. Detailed descriptions, morphological photos of the new species, and a distribution map of four Phycosoma species involved in this study are provided.
References
- Agnarsson, I. (2004) Morphological phylogeny of cobweb spiders and their relatives (Araneae, Araneoidea, Theridiidae). Zoological Journal of the Linnean Society, 141 (4), 447–626. https://doi.org/10.1111/j.1096-3642.2004.00120.x
- Arnedo, M.A., Coddington, J., Agnarsson, I. & Gillespie, R.G. (2004) From a comb to a tree: phylogenetic relationships of the comb-footed spiders (Araneae, Theridiidae) inferred from nuclear and mitochondrial genes. Molecular Phylogenetics and Evolution, 31 (1), 225–245. https://doi.org/10.1016/S1055-7903(03)00261-6
- Baert, L. (1984a) Mysmenidae and Hadrotarsidae from the Neotropical Guarani zoogeographical province (Paraguay and South Brasil) (Araneae). Revue suisse de zoologie, 91, 603–616. https://doi.org/10.5962/bhl.part.81569
- Baert, L. (1984b) Spiders (Araneae) from Papua New Guinea. IV. Ochyroceratidae, Telemidae, Hadrotarsidae and Mysmenidae. Indo-Malayan Zoology, 2, 225–244.
- Dippenaar-Schoeman, A.S., Haddad, C.R., Foord, S.H. & Lotz, L.N. (2021) The Theridiidae of South Africa. Part 1 A-P. Version 1. South African National Survey of Arachnida Photo Identification Guide, Irene, 69 pp. https://doi.org/10.5281/zenodo.7515890
- Fitzgerald, B.M. & Sirvid, P.J. (2003) The genus Trigonobothrys in New Zealand and a redescription of Achaearanea blattea (Theridiidae: Araneae). Tuhinga, 14, 25–33.
- Fitzgerald, B.M. & Sirvid, P.J. (2004) Notes on the genus Phycosoma Cambridge, 1879, senior synonym of Trigonobothrys Simon, 1889 (Theridiidae: Araneae). Tuhinga, 15, 7–12.
- Forster, R.R., Platnick, N.I. & Coddington, J. (1990) A proposal and review of the spider family Synotaxidae (Araneae, Araneoidea), with notes on theridiid interrelationships. Bulletin of the American Museum of Natural History, 119, 1–116.
- Griswold, C.E., Coddington, J.A., Hormiga, G. & Scharff, N. (1998) Phylogeny of the orb-web building spiders (Araneae, Orbiculariae: Deinopoidea, Araneoidea). Zoological Journal of the Linnean Society, 123 (1), 1–99. https://doi.org/10.1111/j.1096-3642.1998.tb01290.x
- Hu, J.L. (2001) Spiders in Qinghai-Tibet Plateau of China. Henan Science and Technology Publishing House, Zhengzhou, 658 pp.
- Levi, H.W. & Levi, L.R. (1962) The genera of the spider family Theridiidae. Bulletin of the Museum of Comparative Zoology, 127 (1), 1–71, pls. 1–14.
- Levi, H.W. (1953) Spiders of the genus Dipoena from America north of Mexico (Araneae, Theridiidae). American Museum Novitates, 1647, 1–39.
- Levi, H.W. (1963) American spiders of the genera Audifia, Euryopis and Dipoena (Araneae: Theridiidae). Bulletin of the Museum of Comparative Zoology, 129 (2), 121–185, pls. 1–12.
- Lin, Y.J., Hu, C.H., Pham, D.S. & Li, S.Q. (2024) Taxonomic notes of theridiid spiders (Araneae: Theridiidae) from China and Vietnam. Zoological Research: Diversity and Conservation, 1 (2), 141–168. https://doi.org/10.24272/j.issn.2097-3772.2024.604
- Liu, J.X., Liang, Y., Yin, H.Q. & Xu, X. (2025) Molecular phylogeny of the hadrotarsine genera from East Asia provides new insights for their affinities and positions within cobweb spiders (Araneae: Theridiidae: Hadrotarsinae). Organisms Diversity & Evolution, 25, 303–327. https://doi.org/10.1007/s13127-025-00670-5
- Paik, K.Y. (1996) Korean spider of the genus Dipoena (Araneae: Theridiidae) II. Description of two new species. Korean Arachnology, 12 (2), 41–46.
- Thorell, T. (1881) Studi sui Ragni Malesi e Papuani. III. Ragni dell’Austro Malesia e del Capo York, conservati nel Museo civico di storia naturale di Genova. Annali del Museo Civico di Storia Naturale di Genova, 17, 1–720.
- WSC (2025) World Spider Catalog. Version 26. Natural History Museum Bern, Bern. Available from: http://wsc.nmbe.ch (accessed 22 June 2025) https://doi.org/10.24436/2
- Wunderlich, J. (1978) Zu Taxonomie und Synonymie der Taxa Hadrotarsidae, Lucarachne Bryant 1940 und Flegia C. L. Koch & Berendt 1854 (Arachnida: Araneida: Theridiidae). Zoologische Beiträge (N.F.), 24, 25–31.
- Yoshida, H. (2002) A revision of the Japanese genera and species of the subfamily Hadrotarsinae (Araneae: Theridiidae). Acta Arachnologica, 51 (1), 7–18. https://doi.org/10.2476/asjaa.51.7
- Zhang, F. & Zhang, B.S. (2012) Spiders of the genus Phycosoma O. P.-Cambridge, 1879 (Araneae: Theridiidae) from Hainan Island, China. Zootaxa, 3339 (1), 30–43 https://doi.org/10.11646/zootaxa.3339.1.2
- Zhu, M.S. (1998) Fauna Sinica: Arachnida: Araneae: Theridiidae. Science Press, Beijing, 436 pp.
