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Munis Entomology & Zoology Mun. Ent. Zool. https://www.munisentzool.org/ (January, 2021) 233 ISSN 1306-3022 © MRG ___________________________________________________________ ON TAXONOMIC ACCOUNT OF LYGAEOIDEAN FAUNA (LYGAEOIDEA: HETEROPTERA: HEMIPTERA) OF GORUMARA NATIONAL PARK AND CHAPRAMARI WILDLIFE SANCTUARY, WEST BENGAL, INDIA Somnath Dhali* and Nilay Ray** * Assistant Professor, Dept. of Zoology, Durgapur Government College, Durgapur, Paschim Burdwan, West Bengal, INDIA, PIN – 713214. E-mail: [email protected], ORCID ID: 0000-0001-6219-8882 ** Associate Professor, P. G. Dept. of Zoology, Hooghly Mohsin College, Chinsurah, Hooghly, West Bengal, INDIA, PIN – 712101. E-mail: [email protected], ORCID ID: 0000-0003-0767-7180 [Dhali, S. & Ray, N. 2021. On taxonomic account of Lygaeoidean fauna (Lygaeoidea: Heteroptera: Hemiptera) of Gorumara National Park and Chapramari Wildlife Sanctuary, West Bengal, India. Munis Entomology & Zoology, 16 (1): 233-254] ABSTRACT: The present communication is dedicated to the systematics of 11 Lygaeoidean species distributed in 8 genera under 2 families viz. Lygaeidae containing 5 and Rhyparochromidae containing 6 species, filed for the first time from Gorumara National Park and Chapramari Wildlife Sanctuary. Of these, two Lygaeids namely Aethalotus indicatus Distant and Astacops occidentalis Distant and two Rhyparochromids namely Lachnophorus singalensis (Dohrn) and Pseudopachybrachius undulatus (Dohrn) are recorded from the State, West Bengal for first time. The important diagnostics, body parts’ measurements, illustrations with photographs of dorsal habitus, camera lucida drawings of different body parts and distribution across the world as well as state wise within India for each of the recorded taxa are presented in this paper. Furthermore, the present converse also includes the keys to the families, tribes, genera and species of the records. KEY WORDS: Lygaeoidea, new record, Gorumara National Park, Chapramari Wildlife Sanctuary, West Bengal, India The superfamily Lygaeoidea of the infra-order Pentatomorpha comprises of more than 4200 described species belonging to over 500 genera, distributed in 16 families across the world (Henry et al., 2015). The representatives of the 8 families, namely Artheneidae, Blissidae, Cymidae, Geocoridae, Heterogastridae, Lygaeidae, Pachygronthidae and Rhyparochromidae are supposed to know and comprised with more than 292 species under 112 genera from India (Saha et al., 2016). The entire perception on the group and the current taxonomic status and distributional pattern of the recorded taxa for the present communication are from Scudder (1963), Slater (1964), Malipatil (1978), Harrington (1980), Schuh & Slater (1995), Slater & O’Donnell (1995), Henry (1997, 2009), Péricart (2001), Cassis & Gross (2002), Kondorosy et al. (2014, 2016), Henry et al. (2015), Kment et al. (2017) and Dellapé & Henry (2020). The information gathered from the previous studies from India unfolds the knowledge on the total number of known species is confined to the monographic works of Distant (1903, 1910). Although, most notable regional works on Indian Lygaeoidean bugs from the country were done by Mukhopadhyay (1988), Chakraborty & Ghosh (1994), Hegde (1995), Munis Entomology & Zoology Mun. Ent. Zool. 234 https://www.munisentzool.org/ (January, 2021) ISSN 1306-3022 © MRG ___________________________________________________________ Ghosh et al. (2006), Saha & Bal (2010), Chandra & Kushwaha (2012, 2014), Gupta & Singh (2014), Saha et al. (2016). The adjoining reserve forests to have with tropical savannas and grasslands, both the Gorumara National Park (GNP) and Chapramari Wildlife Sanctuary (CWLS), are extended in the Terai-Duar region of Indo-Malayan Biogeographic (Olson & Dinerstein, 2002). For details, please visit https://en.wikipedia.org/ wiki/Gorumara_National_Park and https://en.wikipedia.org/wiki/Chapramari_ Wildlife_Sanctuary. MATERIAL AND METHODS The extensive surveys were carried out in different beats/localities like Bichabhanga, Bodhuram, Dhupjhora, Medlajhora, Chukchuki, Gorumara, Jatraprasad, Murti, Khunia, Chandrachur of Gorumara National Park and Chapramari Wildlife Sanctuary during 2016 to 2019. At least twice field visits in each of 3 main seasons namely, summer (February to May), rainy (June to September) and winter (October to January) were made except the period of 15th June to 15th September, as the forests remain closed during at that period of a calendar year. Insects net sweeping, bush beating under inverted umbrella, numerous pit fall traps and hand picking techniques were used for collection of the samples. UV light traps in evening time were also used for this purpose. After collection, the samples were kept in 70% alcohol in glass vials for preservation and the necessary data as the localities from where bugs were collected; collectors’ name and date of collection were noted down in the field. On returned to the laboratory of the Hooghly Mohsin College, Chinsurah, Hooghly, the bugs were stretched, dried, pinned, labeled and preserved in insects’ cabinet for further study. For morphological study, the collected sample was taken under the stereo zoom binocular microscope (Zeiss Stemi SV6). Photographs and drawings of body parts of each species were made with aids of necessary attachments to the microscope. All measurements were taken in millimeter. Abbreviations used for body parts’ measurements are as AbL- Abdominal length; AtL- Antennal length total, AtS1-Antennal 1st segment, AtS2-Antennal 2nd segment, AtS3-Antennal 3rd segment, AtS4-Antennal 4th segment; AOL- Ante ocular length; HdL- Head length; HdW- Head width across eyes; IOD- Inter ocular distance; IOcD- Inter ocellar distance; POL- Post ocular length; PrL- Pronotal length; PrW- Pronotal width across humeral angles; RsL- Rostral length total, RsS1-Rostral 1st segment, RsS2-Rostral 2nd segment, RsS3-Rostral 3rd segment, RsS4-Rostral 4th segment; ScL- Scutellar length; ScW- Scutellar width at base; ToL- Total length; WnL- Wing length; WnW- Wing width across membrane. RESULTS Systematic account of the members of Superfamily Lygaeoidea from Gorumara National Park (GNP) and Chapramari Wildlife Sanctuary (CWLS) is documented herewith. Munis Entomology & Zoology Mun. Ent. Zool. https://www.munisentzool.org/ (January, 2021) 235 ISSN 1306-3022 © MRG ___________________________________________________________ Superfamily LYGAEOIDEA Key to families: 1. Body colour bright, usually either with orange or red or yellow or black markings; head without trichobothria; hemelytra mostly impunctate (except the members of the subfamily Ischnorhynchinae); anterior femora usually unarmed; suture between abdominal sternal segment 4 and 5 usually not forwardly curved; spiracles of abdomen mostly dorsally placed…………………………………………………………………………….....………. LYGAEIDAE Shilling - Body colour dull, usually either with brown or mottled brown or black or white markings; head with trichobothria; hemelytra mostly punctate; anterior femora usually incrassate and armed with stout spines; suture between abdominal sternal segment 4 and 5 usually forwardly curved; position of spiracles on abdomen variable…………………………………………… ……………………………………………………..…………. RHYPAROCHROMIDAE Amyot & Serville Family LYGAEIDAE Shilling, 1829 Subfamily Lygaeinae Key to genera: 1. Eyes pedunculated or stylated; rostrum reaching up to the mid coxae…………….……………. 2 - Eyes not pedunculated nor stylated; rostrum passing the mid coxae and sometimes extending up to the hind coxae……………………………………………………………………….……………. 3 2. Eyes pedunculated; ocelli about twice (sometimes only one and a half times) as far removed from each other as from eyes; pronotum punctate; 1st tarsal segment of posterior leg shorter than 2 apical segments taken together…………………….……………. Aethalotus Stål - Eyes stylated; oeclli much closer to each other; pronotum impunctate; 1st tarsal segment of posterior leg longer than 2 apical segments taken together….……………. Astacops Boisduval 3. Opening of metathoracic scent gland and osteolar peritreme well developed; posterior margin of metasternum obliquely truncate; femora usually unarmed in both sexes…………….. …………………………………………………………………………………………….……… Graptostethus Stål - Opening of metathoracic scent gland and osteolar peritreme obsolete; posterior margin of metasternum straight or somewhat roundly truncate; femora usually spinose in male………… ……………………………………………………………………………………………….………. Spilostethus Stål Genus Aethalotus Stål, 1874 1874. Aethalotus Stål, En. Hem. 4: 98, 100 Diagnosis: Body usually oblong; head triangular, much shorter than broad and deflected anteriorly; eyes pedunculate, ocelli about twice (sometimes 1.5 times) as far removed from each other as from eyes; 1st antennal segment short, not passing the apex of head; rostrum moderate in length, not passing the hind coxae; pronotum trapezoidal shaped, punctate; scutellum equilateral; femora unarmed. Type species: Astacops afzelii Stål Distribution: Afro tropical, Indo-Malayan, Palearctic (Distant, 1910; Slater, 1964; Péricart, 2001). Aethalotus indicatus Distant, 1909 (Fig. 1 & Fig. 12 (a-g) 1909. Aethalotus indicatus Distant, Ann. Mag. Nat. Hist. (8) 3: 318 1910. Aethalotus indicatus Distant, Faun. Brit. India, Rhynch. 5: 3-4 Measurements: ♀ : ToL= 6.21; HdL= 0.94, HdW= 1.59; AOL= 0.44; POL= 0.19; AtL= 3.40, AtS1= 0.36, AtS2= 0.86, AtS3= 0.82, AtS4= 1.36; IOD= 1.00; Munis Entomology & Zoology Mun. Ent. Zool. 236 https://www.munisentzool.org/ (January, 2021) ISSN 1306-3022 © MRG ___________________________________________________________