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PLATINUM The Journal of Threatened Taxa (JoTT) is dedicated to building evidence for conservaton globally by publishing peer-reviewed artcles OPEN ACCESS online every month at a reasonably rapid rate at www.threatenedtaxa.org. All artcles published in JoTT are registered under Creatve Commons Atributon 4.0 Internatonal License unless otherwise mentoned. JoTT allows unrestricted use, reproducton, and distributon of artcles in any medium by providing adequate credit to the author(s) and the source of publicaton. Journal of Threatened Taxa Building evidence for conservaton globally www.threatenedtaxa.org ISSN 0974-7907 (Online) | ISSN 0974-7893 (Print) Short Communication Spiders (Arachnida: Araneae) from the vicinity of Araabath Lake, Chennai, India John T.D. Caleb 26 January 2020 | Vol. 12 | No. 1 | Pages: 15186–15193 DOI: 10.11609/jot.5393.12.1.15186-15193 For Focus, Scope, Aims, Policies, and Guidelines visit htps://threatenedtaxa.org/index.php/JoTT/about/editorialPolicies#custom-0 For Artcle Submission Guidelines, visit htps://threatenedtaxa.org/index.php/JoTT/about/submissions#onlineSubmissions For Policies against Scientfc Misconduct, visit htps://threatenedtaxa.org/index.php/JoTT/about/editorialPolicies#custom-2 For reprints, contact <[email protected]> The opinions expressed by the authors do not refect the views of the Journal of Threatened Taxa, Wildlife Informaton Liaison Development Society, Zoo Outreach Organizaton, or any of the partners. The journal, the publisher, the host, and the part- Publisher & Host ners are not responsible for the accuracy of the politcal boundaries shown in the maps by the authors. Partner Member Threatened Taxa Journal of Threatened Taxa | www.threatenedtaxa.org | 26 January 2020 | 12(1): 15186–15193 ISSN 0974-7907 (Online) | ISSN 0974-7893 (Print) PLATINUM OPEN ACCESS DOI: htps://doi.org/10.11609/jot.5393.12.1.15186-15193 #5393 | Received 07 September 2019 | Finally accepted 10 January 2020 S h o r Spiders (Arachnida: Araneae) from the vicinity of Araabath Lake, t Chennai, India C o m John T.D. Caleb m u n # 27, Saravana Nagar, Manigantapuram, Thirumullaivoyal, Chennai, Tamil Nadu 600062, India. i [email protected] t i o n Abstract: This study documents the spider fauna in the vicinity of a the surroundings of a water body called ‘Araabath Lake’. suburban lake (Araabath Lake) in Chennai. A total of 70 species of Recently, several studies were conducted from the region spiders belonging to 58 genera and 21 families were recorded. Seven species are endemic to India and six are endemic to India and Sri (Caleb 2016a,b, 2017; Caleb & Mathai 2014; Caleb et al. Lanka. Saltcidae was the most dominant with 24 species belonging 2015) contributng considerably to the knowledge of the to 19 genera. Guild structure analysis revealed seven feeding guilds of which, stalkers and orb-web weavers were the dominant feeding group. guilds followed by ground runners and ambushers, respectvely. Study area Keywords: Diversity, guild structure, spiders, Suburban Lake, Thirumullaivoyal. The study was conducted around Araabath Lake and neighboring areas during 2014–2017. The water body lies between (13.129–13.120 0N & 80.138–80.136 0E) (Figure 1). It is about 1km long and 115m wide and Spiders are hyper diverse arthropods and are covers a total area of 7.75ha. The area falls under the represented by 48,365 described species under 4,145 ‘Coastal Area Ecosystem’ with average temperature genera in 120 families worldwide (World Spider Catalog ranging from 23–40 0C. The region receives the north- 2019). In India, 1,799 species under 448 genera and 59 west monsoon and occasional rainfall resultng from families (World Spider Catalog 2019) are known. Not depressions in the Bay of Bengal with a mean annual many studies have been made on the spider diversity rainfall of 135cm (Raghavan & Narayan 2008). from Chennai City (erstwhile Madras) and its suburbs except for those done in the earlier half of the 20th Methods century by Sherrifs (1919, 1927), Gravely (1921, 1924, Spiders were collected and preserved in 70% alcohol. 1931, 1935) and one study by Phanuel in 1963. Specimens were photographed using a Nikon D60 DSLR The aim of the present paper is to present compiled camera. Adult specimens were identfed up to species informaton on the diversity of spiders partcularly from level with the help of available literature and keys Editor: Anonymity requested. Date of publicaton: 26 January 2020 (online & print) Citaton: Caleb, J.T.D. (2020). Spiders (Arachnida: Araneae) from the vicinity of Araabath Lake, Chennai, India. Journal of Threatened Taxa 12(1): 15186–15193. htps://doi.org/10.11609/jot.5393.12.1.15186-15193 Copyright: © Caleb 2020. Creatve Commons Atributon 4.0 Internatonal License. JoTT allows unrestricted use, reproducton, and distributon of this artcle in any medium by providing adequate credit to the author(s) and the source of publicaton. Funding: Self funded. Competng interests: The author declares no competng interests. Acknowledgements: I would like to thank my parents David and Udaya Prasanna for their support and encouragement during the course of this work. My grattude is due to Brainard, Job Daniel, Pradeep, Samson, John Peter, Barnaba Thomas, John Thomas, Johnson and Elizabeth for their curiosity and kind assistance during collecton around the lake. Sincere thanks to Dr. Tridip K. Data (Kolkata) for his generous help in preparing the map. My grattude goes to Mrs. Kumari for her kind help and suggestons during preparaton of this manuscript. 15186 J TT Spiders of Araabath Lake, Chennai Caleb Figure 1. Locaton map of Araabath Lake and its neighborhood. (Tikader & Malhotra 1980; Tikader 1982; Pocock 1901; 6% 1% Gravely 1921, 1924; Proszynski & Caleb 2015). The nomenclature follows the World Spider Catalog (2019). 16% 6% 1% 26% Results and Discussion 16% 26% 6% Spiders representng 21 families, 58 genera and 70 6% species (Table 1, Figure 3) were recorded from around 38%38% Araabath lake, Thirumullaivoyal. Saltcidae was the 7% 7% dominant family consttutng 24 species under 19 genera and followed by Araneidae with 12 species Orb-web weavers Stalkers Ambushers under seven genera. Guild structure analysis revealed Scattered line weavers Ground runners Foliage hunters seven feeding guilds: orb-web weavers, stalkers,Orb-web ground weaversSheet web builders Stalkers Ambushers runners, foliage hunters, sheet web builders, scateredScattered lineFigure weavers2. Guild structure Groundof spiders collected runners from Araabath Lake,Foliage hunters line weavers and ambushers (Table 1) (Uetz et al. 1999). Chennai. Stalkers (38%) and orb-web weavers (26%) consttuteSheet the web builders dominant feeding guild. They are followed by ground Journal of Threatened Taxa | www.threatenedtaxa.org | 26 January 2020 | 12(1): 15186–15193 15187 J TT Spiders of Araabath Lake, Chennai Caleb Table 1. Total number of families, genera, species compositon and runners (16%), ambushers (7%), foliage hunters (6%), functonal guilds of spiders from the vicinity of Araabath Lake. scatered line weavers (6%), sheet web builders (1%) No. of No. of (Figure 2). Seven of the recorded species are endemic to Family genera species Guild India and six are endemic to India and Sri Lanka (Table 2). 1 Araneidae 7 12 Orb-web weavers The spider diversity is rich in this region and there is an 2 Cheiracanthiidae 1 1 Foliage hunters urgent need for preserving this lake from an ecological 3 Clubionidae 1 1 Foliage hunters and biodiversity perspectve. 4 Corinnidae 1 1 Ground runners Araabath Lake is a small suburban lake located in 5 Ctenidae 1 1 Ground runners Thirumullaivoyal, Chennai. The lake serves as a ground 6 Eresidae 1 1 Sheet web builders water reservoir and supports a wide variety of fora 7 Gnaphosidae 3 3 Ground runners and fauna, including migratory birds. Anthropogenic 8 Hersiliidae 1 1 Ambushers actvites like encroachment, drainage of untreated 9 Idiopidae 1 1 Ground runners sewage, open defecaton, dredging of mud for urban constructon projects and utlizaton of the lake as a 10 Liocranidae 1 1 Ground runners dumping ground has resulted in deterioraton of habitat 11 Lycosidae 4 4 Ground runners and water quality (Caleb pers. obs. 2017). This lake is 12 Oecobiidae 1 1 Scatered line weavers in dire need for proper restoraton, maintenance and 13 Oxyopidae 3 3 Stalkers conservaton eforts. 14 Philodromidae 2 2 Ambushers Recent work from this region led to the discovery 15 Pholcidae 1 1 Scatered line weavers of three new species, Icius alboterminus Caleb, Icius 16 Saltcidae 19 24 Stalkers kumariae Caleb and Pellenes iva Caleb (Caleb 2017; 17 Sparassidae 2 2 Foliage hunters Caleb & Kumar 2018) along with the discovery of fve 18 Tetragnathidae 3 5 Orb-web weavers species, Aelurillus kronestedt Azarkina, Chrysilla volupe 19 Theridiidae 2 2 Scatered line weavers (Karsch), Curubis erratca Simon, Micaria dives (Lucas) 20 Thomisidae 2 2 Ambushers and Myrmarachne kuwagata Yaginuma newly recorded Orb-web in India (Caleb 2016a,b, 2018; Caleb et al. 2015) and 21 Uloboridae 1 1 weavers the redescripton of species discovered over a century Total 58 70 since their original descripton (Curubis erratca Simon Figure 3. Diversity of spiders from Araabath Lake, Chennai. 15188 Journal of Threatened Taxa | www.threatenedtaxa.org | 26 January 2020 | 12(1): 15186–15193 J TT Spiders of Araabath Lake, Chennai Caleb Table 2. List of spiders collected from the vicinity of Araabath Lake. Family Genus/Species Family Genus/Species 1 Araneidae Argiope aemula (Walckenaer,
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