Baeus acuminatus Veenakumari, 2020

Kamalanathan, Veenakumari, Mohanraj, Prashanth, Samuel, D. K. & Reddy, M. Krishna, 2020, Revision of Indian species of Baeus Haliday (Hymenoptera: Platygastroidea: Scelionidae), Journal of Natural History 54 (13 - 14), pp. 813-917 : 829-831

Baeus acuminatus Veenakumari , sp. n. ( Figure 1 (a–e))

http://www. zoobank.org/ urn:lsid:zoobank.org:act:4229DB10-EA24-4099-B79B-42060EF815B3

Holotype. Female; body length = 0.76 (0.64–0.89) mm; n = 8

Colour ( Figure 1 (a)). Head and mesosoma brownish black, metasoma darker than mesosoma; hyperoccipital carina black; A1 brown with extremities yellowish brown, A2 dark brown, A3–A6 yellowish brown, clava dark brown; legs yellowish brown.

Head ( Figure 1 (a–e)). Head 1.14 (1.1–1.21)× as wide as high; IOS 0.58 (0.54–0.62)× width of head, 1.6 (1.54–1.71)× eye length; eye (L: W = 11.2:10.71) setose, not touching hyperoccipital carina posteriorly; head height 2.41 (2.21–2.60)× eye length; POL>LOL in ratio of 17.8:9.2; lateral ocellus away from orbits, OOL 0.30 (0.29–0.31)× MOD; distance between posterior margin of lateral ocellus from hyperoccipital carina 1.40 (1.38–1.42)× MOD; pilosity of moderate density, setae of medium length, shorter than those on mesonotum and metasoma; interantennal process triangular, weakly rugose; central keel short, raised, reaching 0.30 (0.28–0.36)× distance to median ocellus; facial striae extending 0.55 (0.51–- 0.58)× the length from mandibular end to lower orbit; malar striae weak; lower frons adjacent to central keel smooth, followed by a reticulate patch; vertex smooth; gena smooth, 3.30 (3.12–3.4)× as long as wide; anterior margin of gena in contact with 0.71 (0.68–0.74)× length of ventral margin of eye; length of A1 subequal to that of clava; length of A2 0.45 (0.41–0.48)× that of A1.

Mesosoma ( Figure 1 (a,c,e)). Mesoscutum and mesoscutellum 0.50 (0.42–0.58)× and 0.13 (0.11–0.21)× as long as wide, respectively; mesoscutum smooth except for a anterolateral coriaceous reticulate patch ( Figure 1 (c)); mesoscutellum smooth; metascutellum narrow, smooth; propodeum smooth dorsally, 0.62 (0.55–0.64)× length of mesoscutellum medially; pilosity of moderate density, setae long; lateral pronotal area dorsally imbricate, densely setose, remainder predominantly smooth except for sparse weak transverse striae posterad; dorso-lateral pronotum extending laterally as a broad prominent spine ( Figure 1 (c)); ventral margin of lateral pronotal area extending as a short blunt projection; transverse carinae on dorsal mesopleuron extend up to level of dorsal metapleuron; mesopleuron ventrally weakly sculptured, remainder smooth; mesopleuron extending as a narrow, sharp, projection ventrally; mesopleural pit small; metapleuron smooth except for sparse shallow foveae ventrally; posterior suture of metapleuron almost straight and bending towards mesopleuron dorsally, but not touching the posterior mesopleural suture; dorsal level of posterior metapleural suture almost level with antero-lateral margin of T 2; metapleuron antero-ventrally extending as a blunt projection; sculpturing of propodeum anterior to propodeal spiracle with two short transverse carinae, region posterior to spiracle smooth; region ventral to spiracle with two transverse carinae with setae on them; remainder of lateral propodeum smooth with sparse transverse carinae; propodeal spiracle opening tear-drop shaped.

Metasoma ( Figure 1 (a,c,e)). Metasoma 0.94 (0.85–0.98)× as long as wide; pilosity of medium density, setae long; T 2 smooth; remaining tergites also smooth.

Material examined. Holotype: Female ( ICAR / NBAIR / P2721 ), INDIA: Rajasthan: Udaipur, Badagaon , Krishi Vigyan Kendra ( KVK), 24 ° 38 ʹ 11 ʹ ’ N 73 ° 40 ʹ 48 ʹ ’ E, 178 m, YPT, 24.IX.2016 ; Paratypes: 14 females ( ICAR / NBAIR / P2722 – P2735 ), same as holotype; 1 female ( ICAR / NBAIR / P2736 ), Rajasthan: Udaipur, Maharana Pratap University of Agriculture and Technology ( MPUAT), 24 ° 36 ʹ 02 ʹ ’ N 73 ° 44 ʹ 21 ʹ ’E, 583 m, YPT, 23 .IX .2016; 29 females ( ICAR / NBAIR / P2737 – P2765 ), Arunachal Pradesh: Pasighat, College of Horticulture and Forestry (CHF), 28 ° 04 ʹ 28 ʹ ’ N 95 ° 19 ʹ 28 ʹ ’E, 173 m, YPT, 03–10 . V .2014; 4 females ( ICAR / NBAIR / P2766 – P2769 ), same as P2737, 10–14 .XI .2014; 1 female ( ICAR / NBAIR / P2770 ), Andaman Islands: South Andaman, Garacharma, Central Island Agricultural Research Institute , ( CIARI), 11 ° 61 ʹ 29 ʹ ’N 92 ° 71 ʹ 54 ʹ ’E, 63 m, YPT, 26 .I .2013; 1 female ( ICAR / NBAIR / P2771 ), same as P2770, 22 .II .2012; 2 females ( ICAR / NBAIR / P2722 – P2723 ), Tamil Nadu: Dharmapuri, Hosur , Uddanapalli, 12 ° 37 ʹ 28 ʹ ’ N 77 ° 55 ʹ 29 ʹ ’E, 758 m, MT, 11 . VI .2015; 3 females ( ICAR / NBAIR / P2774 – P2776 , P2778 ), Goa: Old Goa, Ela, Central Coastal Agricultural Research Institute ( CCARI), 15 ° 29 ʹ 52 ʹ ’ N 73 ° 55 ʹ 00 ʹ ’E, 15 m, YPT, 17 .VII .2015; 1 female ( ICAR / NBAIR / P2777 ), Goa: Carambolim, KVK, CCARI, 15 ° 29 ʹ 53 ʹ ’ N 73 ° 55 ʹ 25 ʹ ’E, 15 m, YPT, 14 .VII .2015; 11 females ( ICAR / NBAIR / P2779 – P2789 ), Tamil Nadu: Vellore, Yelagiri , 12 ° 34 ʹ 43 ʹ ’ N 78 ° 39 ʹ 46 ʹ ’E, 969 m, YPT, 15–18 . VI .2016; 4 females ( ICAR / NBAIR / P2790 – P2793 ), Odisha: Bhubaneswar, Orissa University of Agriculture and Technology ( OUAT), 20 ° 15 ʹ 52 ʹ ’ N 85 ° 48 ʹ 50 ʹ ’E, 45 m, YPT, 29 .I .2016; 8 females ( ICAR / NBAIR / P2794 – P2801 ), Tamil Nadu: Dharmapuri, Hosur , Uddanapalli, 12 ° 37 ʹ 28 ʹ ’ N 77 ° 55 ʹ 29 ʹ ’E, 758 m, MT, 18 . V .2015; 10 females ( ICAR / NBAIR / P2802 – P2811 ), same as P2794, YPT, 29 .XI .2014; 6 females ( ICAR / NBAIR / P2812 – P2817 ), same as P2802, 02 .XII .2014; 1 female ( ICAR / NBAIR / P2818 ), same as P2794, 17 .I .2015; 4 females ( ICAR / NBAIR / P2819 – P2822 ), Tamil Nadu: Dharmapuri, Kelamangalam, Jakkeri , 12 ° 42 ʹ 17 ʹ ’ N 77 ° 48 ʹ 37 ʹ ’E, 899 m, YPT, 03–16 . III .2015; 3 females ( ICAR / NBAIR / P2823 – P2825 ), same as P2794, YPT, 31 .I .2015; 1 female ( ICAR / NBAIR / P2826 ), same as P2794, MT, 27 .IV .2015; 1 female ( ICAR / NBAIR / P2827 ), same as P2794, YPT, 03 .II .2016; 13 females ( ICAR / NBAIR / P2828 – P2840 ), Tamil Nadu: Yercaud, HRS, 11 ° 47 ʹ 44 ʹ ’ N 78 ° 12 ʹ 42 ʹ ’E, 1399 m, YPT, 04 .VIII .2014; 5 females ( ICAR / NBAIR / P2841 – P2843 , P2845 , P2846 ), same as P2828, 04–06 .VIII .2016; 2 females ( ICAR / NBAIR / P2844 , P2853 ), Assam: Jorhat, Assam Agriculture University , 26 ° 43 ʹ 20 ʹ ’ N 94 ° 11 ʹ 33 ʹ ’E, 98 m, YPT, 24 .II .2017; 4 females ( ICAR / NBAIR / P2847 – P2850 ), Tamil Nadu: Coimbatore, TNAU, 11 ° 00 ʹ 55 ʹ ’ N 76 ° 56 ʹ 12 ʹ ’E, 434 m, YPT, 03 . VI .2015; 1 female ( ICAR / NBAIR / P2851 ), Tamil Nadu: Kodaikanal, Shenbaganur , 10 ° 14 ʹ 01 ʹ ’ N 77 ° 30 ʹ 47 ʹ ’E, 1865 m, YPT, 02 .IV .2014; 1 female ( ICAR / NBAIR / P2852 ), Tamil Nadu: Udagamandalam, IISWC, 11 ° 24 ʹ 00 ʹ ’ N 76 ° 40 ʹ 13 ʹ ’E, 2224 m, YPT, 06 . VI .2015; 1 female ( ICAR / NBAIR / P2854 ), Assam: Dibrugarh , Krishi Vigyana Kendra ( KVK), 27 ° 47 ʹ 28 ʹ ’N 94 ° 91 ʹ 19 ʹ ’E, 109 m, YPT, 07 .XI .2014; 1 female ( ICAR / NBAIR / P2855 ), Tripura: Agartala , Tripura University ( TU), 23 ° 76 ʹ 28 ʹ ’ N 91 ° 26 ʹ 33 ʹ ’E, 17 m, YPT, 03 .III .2016; 1 female ( ICAR / NBAIR / P2856 ), Karnataka: Bengaluru, Hessaraghatta , 13 ° 08 ʹ 01 ʹ ’ N 77 ° 29 ʹ 27 ʹ ’E, 859 m, SN, 22 .VIII .2013; 1 female ( ICAR / NBAIR / P2857 ), Karnataka: Chikkaballapur, Nandi Hills , 13 ° 37 ʹ 02 ʹ ’N 77 ° 68 ʹ 34 ʹ ’E, 1448 m, YPT, 01 . XI .2013; 1 female ( ICAR / NBAIR / P2858 ), Karnataka: Bengaluru, Attur , 13 ° 05 ʹ 48 ʹ ’ N 77 ° 33 ʹ 59 ʹ ’E, 936 m, YPT, 23 .VIII .2013; 1 female ( ICAR / NBAIR / P2859 ), same as P2858, 05 . XI .2013; 1 female ( ICAR / NBAIR / P2860 ), Karnataka: Bengaluru, Jarakabande Kaval , 13 ° 05 ʹ 41 ʹ ’ N 77 ° 32 ʹ 35 ʹ ’E, 921 m, MT, 22 . V .2015; 1 female ( ICAR / NBAIR / P2861 ), Karnataka: Mudigere, College of Horticulture , 13 ° 06 ʹ 54 ʹ ’ N 75 ° 37 ʹ 57 ʹ ’E, 976 m, YPT, 30 .IX .2015; 2 females ( ICAR / NBAIR / P2862 , P2866 ), Tamil Nadu: Yercaud, HRS, 11 ° 47 ʹ 44 ʹ ’ N 78 ° 12 ʹ 42 ʹ ’E, 1399 m, YPT, 05 .VIII .2014; 1 female ( ICAR / NBAIR / P2863 ), Karnataka: Bengaluru, Hessaraghatta , 13 ° 08 ʹ 01 ʹ ’ N 77 ° 29 ʹ 27 ʹ ’E, 859 m, YPT, 17 .IX .2016; 1 female ( ICAR / NBAIR / P2864 ), Meghalaya, Umiam, ICAR Research Complex for NEH Region , 25 ° 40 ʹ 52 ʹ ’ N 91 ° 54 ʹ 56 ʹ ’E, 970 m, YPT, 08 . VI .2013; 1 female ( ICAR / NBAIR / P2865 ), Assam: Guwahati, Rani, NRC for Pigs , 26 ° 01 ʹ 51 ʹ ’ N 91 ° 34 ʹ 24 ʹ ’E, 59 m, YPT, 06 .XI .2017; 1 female ( ICAR / NBAIR / P3402 ), Karnataka: Kanakapura , 12 ° 32 ʹ 46 ʹ ’ N 77 ° 25 ʹ 11 ʹ ’E, 640 m, YPT, 22 .IV .2015; 1 female ( ICAR / NBAIR / P3403 ), Tamil Nadu: Udagamandalam, near Emerald Lake , 11 ° 19 ʹ 56 ʹ ’ N 76 ° 37 ʹ 10 ʹ ’E, 1982 m, YPT, 19 .II .2016; 1 female ( ICAR / NBAIR / P3404 ), Tamil Nadu: Dharmapuri, Hosur, Uddanapalli , 12 ° 37 ʹ 28 ʹ ’ N 77 ° 55 ʹ 29 ʹ ’E, 758 m, MT, 11 . VI.2015.

Etymology. The epithet ‘acuminatus’ refers to the sharp spine on dorso-lateral pronotum. The name is treated as an adjective.

Diagnosis. Baeus acuminatus sp. n. is different from all other Oriental species of Baeus because of the presence of following combination of character states: head, mesonotum and metasoma smooth except for the antero-lateral coriaceous reticulate patch on mesoscutum, dorso-lateral pronotum extending as a prominent spine and presence of long setae on mesoscutum and metasoma.

Figures

Figure 1. Baeus acuminatus sp. n. (a) Habitus (colour); (b) Frons; (c) Habitus, LS- lateral spine, RPcoriaceous reticulate patch; (d) Antenna; (e) Habitus (lateral view).