Abstract
The six-eyed spider family Segestriidae is poorly documented from India, with only five species belonging to two genera. Here we describe a new genus, Indoseges gen. nov. with five new spp. viz. I. malkhangiri sp. nov., I. sushildutta sp. nov., I. chilika sp. nov., I. narayani sp. nov. and I. satkosia sp. nov. from Odisha. The first two spp. are described based on both male and female specimens and the rest on females only. The new genus resembles the genus Ariadna Audouin, 1826; still, males differ with respect to first leg spines, shape and position of apophysis and in the palp structure, and females having distinct spination in palp tarsi and femur of first two legs, and in the genitalia structure. Along with a distribution map of the Segestriids of India this paper also provides natural history information about the new genus, a discussion on its relationship with Ariadna, and the putative synapomorphies that define its placement in the subfamily Ariadninae.
References
Beatty, J. (1970) The spider genus Ariadna in the Americas (Araneae, Dysderidae). Bulletin of the Museum of Comparative Zoology, 139 (8), 433–518.
Fomichev, A.A. & Marusik, Y.M. (2020) Notes on the spider genus Segestria Latreille, 1804 (Araneae: Segestriidae) in the East Palaearctic with description of three new species. Zootaxa, 4758 (2), 330–346.
https://doi.org/10.11646/zootaxa.4758.2.7
Giroti, A.M. & Brescovit, A.D. (2015) Revalidation of the spider genus Citharoceps Chamberlin, 1924 (Araneae, Segestriidae). ZooKeys, 495, 1–19.
https://doi.org/10.3897/zookeys.495.8950
Giroti, A.M. & Brescovit, A.D. (2017) Revision of the spider genus Gippsicola Hogg, 1900 (Araneae: Segestriidae). Zootaxa, 4227 (3), 390–406.
https://doi.org/10.11646/zootaxa.4227.3.6
Giroti, A.M. & Brescovit, A.D. (2018) The taxonomy of the American Ariadna Audouin (Araneae: Synspermiata: Segestriidae). Zootaxa, 4400 (1), 1–114. [& Erratum: vol. 4438 (no. 3): 600]
https://doi.org/10.11646/zootaxa.4400.1.1
Gravely, F.H. (1921) The spiders and scorpions of Barkuda Island. Records of the Indian Museum, 22, 399–421.
https://doi.org/10.5962/bhl.part.1478
Grismado, C.J. (2008) A taxonomic revision of the spider genus Ariadna Audouin, 1826 in Argentina and Chile, with the description of five new species (Arachnida, Araneae, Segestriidae). Zoosystema, 30, 333–360.
Marsh, J.R., Baehr, B.C., Glatz, R.V. & Framenau, V.W. (2018) New species of tube web spiders of the genus Ariadna from South Australia (Araneae, Segestriidae). Evolutionary Systematics, 2, 137–149.
https://doi.org/10.3897/evolsyst.2.29172
Ramírez, M.J. (2014) The morphology and phylogeny of dionychan spiders (Araneae: Araneomorphae). Bulletin of the American Museum of Natural History, (390), 1–374.
Siliwal, M., Yadav, A. & Kumar, D. (2017) Three new species of tube-dwelling spider genus Ariadna Audouin, 1826 (Araneae: Segestriidae) from India. Zootaxa, 4362 (3), 433–441.
https://doi.org/10.11646/zootaxa.4362.3.7
Simon, E. (1906) Arachnides (2e partie). In: Voyage, de.M. (Ed.), Maurice Maindron dans l’Inde méridionale. vol. 75. 8e Mémoire. Annales de la Société Entomologique de France, (1906), pp. 279–314.
World Spider Catalog. (2020) Version 21.5. Natural History Museum Bern. 2020. Available form: http://wsc.nmbe.ch. (accessed on 15 July 2020)
Wunderlich, J. (2020) New and already described fossil spiders (Araneae) of 20 families in mid and late Cretaceous Burmese Ambers, with notes on spider phylogeny, evolution and classification. Beiträge zur Araneologie, 13, 22–164.