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29 Darkling Beetles (Coleoptera: Tenebrionidae)

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29 Darkling Beetles (Coleoptera: Tenebrionidae) Journal on New Biological Reports 1(1): 29-32(2012) ISSN 2319 – 1104 (Online) Darkling Beetles (Coleoptera: Tenebrionidae) of Melghat Tiger Reserve, Central India Vaibhao G. Thakare 1, Varsha S. Zade 2 and Vishwanath D. Hegde 3 1,2 Government Vidarbha Institute of Science and Humanities, Amravati-444604, Maharashtra 3Zoological Survey of India, M-Block, New Alipore, Kolkata-700053, India (Received on: 16 July, 2012; accepted on: 22 July, 2012) ABSTRACT The diversity of darkling beetles at different sites in Melghat Tiger Reserve was studied from February 2009 to December 2010. Melghat Tiger Reserve is located as a southern offshoot of Satpuda hill range in Central India called Gawilgarh hill in the state of Maharashtra. Total 8 species of darkling beetles belonging to family Tenebrionidae were recorded from the study area. Tenebrioninae was the dominant subfamily with respect to species diversity. All these darkling beetle species are new records from Melghat Tiger Reserve, Maharashtra. Key Words: Darkling Beetles, Tenebrionidae, Melghat Tiger Reserve. INTRODUCTION Tenebrionidae is one of the largest family containing These factors differ for different species and for more than 18,000 species in the world, which eggs and larvae. We therefore expect tenebrionid to exhibits an extraordinary wide range of superficial be sensitive indicators of biodiversity change along dissimilarity: the larvae on the other hand are natural and anthropogenic gradients in dryer parts of strikingly uniform in character. Tenebrionidae is the Southern Africa (Parenzee, 2001). Long-term versatile group, found almost all habitats throughout monitoring of their populations can provide valuable the world. They found in rotten wood, under bark, insights into how environmental changes affect stones and logs, feeding on decaying vegetation, organisms (Henschel et al. , 2003). dung, seeds, cereals, fungi, roots etc. They are varied Many tenebrionids also secrete a layer of in shape and size (2-35 mm in length), generally wax that coats the exoskeleton, reflecting some of smooth, brown or black. These forms are very often the sun’s radiation and protecting beetles from water apterous, or have vestigial wings, and the elytra are loss, abrasion and microorganisms (Chown and frequently immovable. Many of the wood feeding Nicolson 2004). Most of these species have species have ample wings. extended lifespans of up to six years spent mostly as Tenebrionidae is the large family which can adults, allowing them time to gather the energy they be distinguished by the following characters like; need to reproduce (M. Seely pers. comm.). These Body hard, antennal insertion hidden under frons, beetles are flightless, having evolved fused wing elytra usually completely covering the abdomen, covers; this may or may not function as an abdomen with five visible sternites and first three adaptation for water conservation (Duncan 2003), segments connate, front coxal cavities closed, behind but makes sense for an insect that frequently buries heteromerous tarsi, tarsal segments and claws simple. itself in a windswept environment. Comparatively few of its species are pests of stored A few adaptations of individual tenebrionid grain products. species are particularly striking. Onymacris Communities of these beetles integrate unguicularis , the fog basking beetle, stands on its factors such as the availability of detritus, plant cover head, collecting droplets of fog on its body that run and various soil characteristics, such as moisture, down grooves into its mouth (Hamilton and Seely hardness, and grain size composition. 1976). Onymacris bicolor has a partially white exoskeleton, reducing the amount of heat it absorbs from visible light. Both these beetles have evolved __________________________________________ especially long legs; when they are overheated, Corresponding author: [email protected] they can temporarily elevate their bodies above the 29 Vaibhao G. Thakare, Varsha S. Zade and Vishwanath D. Hegde dune surface (“stilting”). In specific wind 2. Gonocephalum helopioide (Fairmaire, 1894) conditions, a few millimeters of elevation can 3. Opatroides vicinus Fairmaire, 1896 significantly reduce their body temperature (Chown 4. Scleron irregulata Dist. and Nicolson 2004). Subfamily: Pimelinae Latreille, 1802 In view of the important role played by Tribe: Tentyriini Eschscholtz, 1831 darkling beetles in the ecosystem, the present work 1. Rhytinota subfossulata Solier, 1835. was conducted to determine the diversity of 2. Rhytinota indica Schaufuss, 1872 darkling beetles in Melghat Tiger Reserve, Amravati, Maharashtra, India. Details of the species examined: 1. Cossyphus (Cossyphus) depressus Fabricius, STUDY AREA 1781 Cossyphus (Cossyphus) depressus (Fabricius, 1781): A study was conducted in 2009 and 2010 in the SCUPOLA (2000): 231. protected area of the Melghat Tiger Reserve (MTR), Cossyphus (Cossyphus) planus Fabricius, 1801: Vidarbha region, Maharashtra. The geographical SCUPOLA (2000): 231. 0 coordinates of the study area are 21 29. 96’N, Material examined: MTR, Jarida, 06. vii.2009 0 077 12.338’ E. Melghat Tiger Reserve is located at (2ex.); GPS- 21 039.987’N, 077029.252’ E; Alt. southern off shoot of Satpuda hill range in Central 660m; Coll. V.G. Thakare. India also called as Gawilgarh hill range in Distribution: Karnataka, Tamil Nadu, West Bengal, Maharashtra. The forest area of MTR is tropical and Uttarakhand, Uttar Pradesh ( Hegde 2012) and dry deciduous in nature dominated with teak trees Maharashtra- Melghat Tiger Reserve, Jarida. (Tectona grandis ). Remark: Collection of this species constitutes the First record not only from Melghat Tiger Reserve, METHODOLOGY but also from Maharashtra state. Almost all the habitats were explored in Melghat 2. Platynotus punctatipenis Mulsant and Rey 1853 tiger Reserve in search of tenebrionds and are Platynotus punctatipennis Mulsant and Rey, 1853a: classified according to Bouchard et al (2005). 270- Gemminger and de Harold 1870: 1912; Gebien 1910b: 273, 1938b: 293; Kaszab 1975b: 295; Iwan RESULTS 1997a: 268, 2002:91. Material examined: MTR, Semadoh (Forest Rest In the present work total eight species of darkling House), 07.vii.2009 (1ex.); GPS- N 21 0 29.875' E beetles belonging to family Tenebrionidae were 077 0 18 .881'; Coll. V.G. Thakare recorded from the study area. All the species have Distribution : India: Maharashtra- Melghat Tiger been recorded for the first time from Melghat Tiger Reserve. Reserve, Maharashtra. The maximum numbers of Remark: Collection of this species constitutes the darkling beetles were observed in the Semadoh First record not only from Melghat Tiger Reserve, region of study area. The present study revealed the but also from Maharashtra state. presence of 8 species from 7 genera of 4 tribes under 3 subfamilies of Tenebrionidae. Details of synonyms, 3. Gonocephalum consobrinum Blair, 1923 material examined and distribution of studied 1923. Gonocephalum consobrinum Blair, Ent. tenebrionid species are also given. Month. Mag . (3) 9: 122. 1952. Gonocephalum consobrinum Kaszab. LIST OF DARKLING BEETLES FROM Entomologische Arbeiten , 3; 629-630. MELGHAT TIGER RESERVE Material examined: MTR , Kolkas, 07.vii.2009 (1ex.), GPS- 21 031'.107’N, 077 012.588’; Alt. 1447 FAMILY: TENEBRIONIDAE ft.; Coll. V.G. Thakare Subfamily: Lagriinae Latreille, 1802 Distribution: West Bengal- Maldah, Maharashtra, Tribe: Cossyphini Latreille, 1802 Melghat Tiger Reserve. 1. Cossyphus depressus Fabricius, 1781 Remark: Collection of this species constitutes the Subfamily: Tenebrioninae Latreille, 1802 First record not only from, Melghat Tiger Reserve, Tribe: Pedinini Eschscholtz, 1829 but also from Maharashtra state. 2. Platynotus punctatipennis Mulsant and Rey, 1853 4. Gonocephalum helopioide ( Fairmaire, 1894) Tribe: Opatrini Brulle, 1832 Hopatrum helopioide Fairmaire, 1894: 19. Opatrum helopioides (Fairmaire, 1894): 19. – 1. Gonocephalum consobrinum Blair, 1923 Champion 1895: 116. 30 Journal on New Biological Reports 1(1): 29-32(2012) Figure1. Map of study area (Kalimpong), Uttarakhand- Raipur, Dehradun and Gonocephalum helopioide (Fairmaire, 1894). – Maharashtra – Melghat Tiger Reserve. Gebien 1910b: 323, 1939: 448; Kaszab 1952a: 574; Schawaller 1997a: 7; Iwan and Löbl2008: 264. Material examined: Material examined: MTR. Remark: Collection of this species constitutes the Semadoh, 02. vii.2010 (3ex.); GPS- N 21 0 30.119' E First record not only from Melghat Tiger Reserve, 077 0 19 .012' Alt. - 1731 ft.; Coll. V.G. Thakare. but also from Maharashtra state. Distribution: : India: Uttarakhand- Rajaji National Park, Haridwar, Dehradun, Sikkim, West Bengal- 6. Scleron irregulata Dist. Darjeeling, Maharashtra – Melghat Tiger Reserve. Material examined: MTR, Tarubanda (Compt. no. Remark: Collection of this species constitutes the 762), Forest Rest House, 13.x.2010 (2ex.); GPS- First record not only from Melghat Tiger Reserve, 21 027.959’N, 077 009.717’E, Elv n – 501 m; Coll. but also from Maharashtra state. V.G. Thakare Distribution: Ostindia (East India) West Bengal - 5. Opatroides vicinus Fairmaire, 1896 Darjiling (Kalimpong). Maharashtra – Melghat Tiger 1896 . Opatroides vicinus Fairm. Ann. Soc. Ent. Belg . Reserve. XL. Kaszab 1930. Ent. Arb. Mus. Frey, 11: 157-159. Material examined: MTR, Tarubanda (Compt. Remark: Collection of this species constitutes the no.762), 12. X.2010 (2ex.); GPS- N 21 0 28' 198' E First record not only from Melghat Tiger Reserve, 077 0 10 281'; Alt- 505m.; coll. V.G. Thakare but also from Maharashtra
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