Abstract
Four new species of trachelid spiders belonging to the genus Utivarachna Kishida, 1940 are described: U. angsoduo sp. nov., U. balonku sp. nov., U. rimba sp. nov., and U. trisula sp. nov. Part of the EFForTS project, the spider specimens were uncovered in a canopy fogging collection of tree crown arthropods along a land-use gradient from rainforest via jungle rubber (rubber agroforestry) to monocultures of rubber and oil palm in Jambi Province, Sumatra, Indonesia. Three of the proposed new species were found exclusively in rainforest or jungle rubber agroforest (U. angsoduo sp. nov., U. rimba sp. nov., U. trisula sp. nov.), and one of them exclusively in monocultures of rubber trees (U. balonku sp. nov.). We provide photographs and distribution maps for the proposed new species, and discuss their potential ecology based on their sampling locations. We also encountered a fifth species of the genus in all four land-use systems, U. phyllicola Deeleman-Reinhold, 2001, one of two species of the genus previously recorded from Sumatra, and also provide photographs and distribution maps for this species in the research area of the EFForTS project.
References
- Chami-Kranon, T., Likhitrakarn, N. & Wongsawad, C. (2007) Utivarachna rama sp. n., a new species of tracheline spiders (Araneae: Corinnidae) from Thailand. Zootaxa, 1446, 59–68. https://doi.org/10.11646/zootaxa.1446.1.5
- Chu, C., Li, S. Q., Pham, D. S. & Yao, Z. Y. (2023b) Three new species of the spider genus Utivarachna Kishida, 1940 (Araneae, Trachelidae) from China and Vietnam. ZooKeys, 1181, 201–217. https://doi.org/10.3897/zookeys.1181.110628
- Dankittipakul, P., Tavano, M. & Singtripop, T. (2011) Two new species of the spider genus Utivarachna Kishida, 1940 from Southeast Asia (Araneae, Corinnidae). Annali del Museo Civico di Storia Naturale Giacomo Doria, 103, 133–146.
- Deeleman-Reinhold, C.L. (2001) Forest spiders of South East Asia: with a revision of the sac and ground spiders (Araneae: Clubionidae, Corinnidae, Liocranidae, Gnaphosidae, Prodidomidae and Trochanterriidae). Brill, Leiden, 591 pp. https://doi.org/10.1163/9789004475588
- Drescher, J., Rembold, K., Allen, K., Beckschäfer, P., Buchori, D., Clough, Y., Faust, H., Fauzi, A.M., Gunawan, D., Hertel, D., Irawan, B., Jaya, I.N. S., Klarner, B., Kleinn, C., Knohl, A., Kotowska, M.M., Krashevska, V., Krishna, V., Leuschner, C., Lorenz, W., Meijide, A., Melati, D., Nomura, M., Pérez-Cruzado, C., Qaim, M., Siregar, I.T., Steinebach, S., Tjoa, A., Tscharntke, T., Wick, B., Wiegand, K., Kreft, H. & Scheu, S. (2016) Ecological and socio-economic functions across Tropical Land Use Systems after rainforest conversion. Philosophical Transactions of the Royal Society B: Biological Sciences, 371, 1694. https://doi.org/10.1098/rstb.2015.0275
- Hayashi, T. & Yoshida, H. (1993) Three new species of the family Clubionidae (Arachnida: Araneae) from Taiwan. Acta Arachnologica, 42, 47–53. https://doi.org/10.2476/asjaa.42.47
- Jin, C., Yin, X.C. & Zhang, F. (2015) A new species of the genus Utivarachna Kishida, 1940 (Araneae: Trachelidae) from China, with the first description of the male of U. fabaria Zhao & Peng, 2014 and a redescription of U. gui (Zhu, Song & Kim, 1998). Zootaxa, 4057 (4), 569–581. https://doi.org/10.11646/zootaxa.4057.4.6
- Kishida, K. (1940) Notes on two species of spiders, Doosia japonica and Utivarachna fukasawana. Acta Arachnologica, 5, 138–145. https://doi.org/10.2476/asjaa.5.138.
- Li, H.B., He, Y.Y., Zhang, J.S. & Yu, H. (2022a) A new species of Utivarachna Kishida, 1940 from Fanjing Mountain Nature Reserve, Guizhou, China (Araneae: Trachelidae). Zootaxa, 5094 (4), 587–594. https://doi.org/10.11646/zootaxa.5094.4.4
- Lin, Y.J., Li, S.Q. & Pham, D.S. (2023) Taxonomic notes on some spider species (Arachnida: Araneae) from China and Vietnam. Zoological Systematics, 48, 1–99. https://doi.org/10.11865/zs.2023101
- Liu, K.K., Yin, H.Q., Haddad, C.R., Xu, X. & Ma, Z.N. (2020) Two new species of Utivarachna Kishida, 1940 from southern China, with an updated key to the Chinese species (Araneae: Trachelidae). Zootaxa, 4803 (1), 87–102. https://doi.org/10.11646/zootaxa.4803.1.5
- Ono, H. & Aung, M. M. (2022) A record of Utivarachna phyllicola (Araneae, Trachelidae) from Lampi Island, southern Myanmar. Bulletin of the National Museum of Nature and Science, Tokyo, Series A, 48, 29–34. https://doi.org/10.50826/bnmnszool.48.2_29
- Pollierer, M.M., Drescher, J., Potapov, A., Kasmiatun, Mawan, A., Mutiari, M., Nazarreta, R., Hidayat, P., Buchori, D. & Scheu, S. (2023) Rainforest conversion to plantations fundamentally alters energy fluxes and functions in canopy arthropod food webs. Ecology Letters, 26, 1663–1675. https://doi.org/10.1111/ele.14276
- Potapov, A.M., Dupérré, N., Jochum, M., Dreczko, K., Klarner, B., Barnes, A.D., Krashevska, V., Rembold, K., Kreft, H., Brose, U., Widyastuti, R., Harms, D. & Scheu, S. (2020) Functional losses in ground spider communities due to habitat structure degradation under tropical land-use change. Ecology, 101, e02957. https://doi.org/10.1002/ecy.2957
- Ramírez, M.J. (2014) The morphology and phylogeny of dionychan spiders (Araneae: Araneomorphae). Bulletin of the American Museum of Natural History, 390, 1–374. https://doi.org/10.1206/821.1
- Ramos, D., Hartke, T.R., Buchori, D., Dupérré, N., Hidayat, P., Lia, M., Harms, D., Scheu, S., & Drescher, J. (2022) Rainforest conversion to rubber and oil palm reduces abundance, biomass and diversity of canopy spiders. PeerJ, 10, e13898. https://doi.org/10.7717/peerj.13898
- Simon, E. (1896) Descriptions d’arachnides nouveaux de la famille des Clubionidae. Annales de la Société Entomologique de Belgique, 40 (9), 400–422. https://doi.org/10.5962/bhl.part.2026
- Simon, E. (1897) Histoire naturelle des araignées. Deuxième édition, tome second. Roret, Paris, pp. 1–192. https://doi.org/10.5962/bhl.title.51973
- Simon, E. (1906) Voyage de M. Maurice Maindron dans l’Inde méridionale (mai à novembre 1901). 8me Mémoire. Arachnides (2e partie). Annales de la Société Entomologique de France, 75, 279–314.
- WSC (2023) World Spider Catalog. Version 24.5. Natural History Museum Bern. Online at: http//wsc.nmbe.ch (accessed 8 November 2023) https://doi.org/10.24436/2
- Yamasaki, T., Hashimoto, Y., Endo, T., Hyodo, F., Itioka, T., Mohamed, M. & Meleng, P. (2023) Taxonomic study of Bornean species of Utivarachna Kishida, 1940 (Araneae: Trachelidae), with the description of a new species. Zootaxa, 5343 (1), 55–73. https://doi.org/10.11646/zootaxa.5343.1.3
- Zhao, Y. & Peng, X.J. (2014) Spiders of the genus Utivarachna from China (Araneae: Corinnidae). Zootaxa, 3774 (6), 578–588. https://doi.org/10.11646/zootaxa.3774.6.6