Mycterothrips nainiae, Singha & Patidar & Kumar & Tyagi, 2021

Singha, Devkant, Patidar, Abhishek, Kumar, Vikas & Tyagi, Kaomud, 2021, A new species of Mycterothrips Trybom (Thysanoptera: Thripidae) from India with new record of the genus Paithrips Nonaka & Jangvitaya, Zootaxa 5048 (1), pp. 135-140 : 136-138

Mycterothrips nainiae sp. n.

( Figs 1–9 )

Female macroptera. Body yellowish brown ( Fig. 1 ). Antennal segment I yellow; II light brown; III yellow on basal fifth then light brown; IV–VIII brown. Legs yellow. Fore wings shaded. Head yellow with ocellar triangle light brown. Pronotum yellow with brown markings. Mesonotum surface with brown shade anteriorly, medially and laterally; metanotum with light brown shade medially. Abdomen yellow with brown patch on anterior half of segments II–VII, segments VIII–X yellow. Body setae light brown.

Head longer than broad with transverse striation on dorsal surface, cheeks slightly rounded; head with three pairs of ocellar setae, III more than six times longer than I, situated between the hind ocelli and 3.5 times as long as distance between their interval; postocular setae III the longest ( Fig. 3 ); antennae 8-segmented; III and IV each with forked sense-cones reaching 1/4th of the next segment; II–VI with rows of microtrichia ( Fig. 8 ); pronotum wider than long, with 32–35 discal setae and two pairs long posteroangular setae, ( Fig. 3 ); mesonotum without anteromedian campaniform sensilla, median pair of setae little ahead of posterior margin and the level of submedian pair ( Fig. 4 ), mesosternal spinula present; metanotum weakly reticulate medially, median pair of setae situated near to anterior margin ( Fig. 4 ); metasternal spinula present; fore wings upper vein with 7 basal and 2 distal setae, lower vein with 14 setae, clavus with five veinal setae and one discal setae ( Fig. 7 ), posterior fringes wavy. Abdominal tergites smooth medially, but with ciliate microtrichia on lateral third; tergite II with three lateral marginal setae, tergite VIII with complete comb of microtrichia along posterior margin, tergite IX with campaniform sensilla near to posterior margin, tergite X without a median split ( Fig. 6 ); sternites without accessory seta. Ovipositor well developed.

Measurements. (holotype female in microns). Body length 1919. Head length (width across cheeks) 141(165); compound eye dorsal length (width) 80 (40); pronotum median length (width) 163 (202). Fore wing length 1078. Ovipositor length 256. Antenna length 380; segments I–VIII length (width): 41 (38), 62 (35), 92 (30), 87 (28), 60 (25), 70 (25), 12 (10), 25 (6).

Measurements. (Female paratypes in microns). Body length 1901–1919. Head length (width across cheeks) 139–144 (165–175); compound eye dorsal length (width) 79–83 (40–43); pronotum median length (width) 163–168 (202–205). Fore wing length 1078–1081. Ovipositor length 256–260. Antenna length 379-384; segments I–VIII length (width): 39–41 (38–39), 62–64 (33–35), 90–92 (30-31), 87–88 (28–30), 59 (27), 59–62 (25–27), 12–14 (10), 23–25 (6–8).

Male macroptera. Male similar to female except pale yellow body ( Fig. 2 ), antennal segment II–V with microtrichia but absent on VI, antennal segment VI longer than female ( Fig. 9 ). Fore wing lower vein with 12 setae; tergite IX with posterior campaniform sensilla, vestigial tubercles present on posterior margin ( Fig. 5 ). Abdominal sternites without accessory setae and pore areas. Hypomere expanded at apex ( Fig. 5 ).

Measurements (Male paratype in microns): Body length 1585. Head length (width across cheeks) 116 (130); compound eye dorsal length (width) 66 (46); pronotum median length (width) 135 (168). Fore wing length 863. Antennal I–VIII length (width): 37 (35), 56 (30), 78 (27), 65 (30), 43 (24), 102 (24), 14 (9), 20 (7).

Material studied. Holotype female, INDIA, Uttarakhand, Nainital , (N29.37, E79.51, 1614 m) from general vegetation, 09.iii.2020, holotype (Reg. No. 11123/H17, Accession No. OK165458 ) by Vikas Kumar and Kaomud Tyagi, deposited at the NZC, Kolkata, India.

Paratypes: 24 females, one male, all from same locality as holotype (Reg. No. 11077/H17, 11105/H17 to 11122/ H17, 11124/H17 to 11138 /H17) .

Etymology. This species named after the Naini lake, a natural freshwater body situated at Nainital.

Comments. Using the key to world species of Mycterothrips by Masumoto and Okajima (2006), the female and male specimens track to couplets 9 and 28 respectively. The new species comes under salicis -group and close to shihoae in the following characters: antennal segment VI without microtrichia ventrally; abdominal tergite II with three lateral marginal setae; tergite IX with posterior pair of campaniform sensilla only; abdominal sternites without discal setae and abdominal tergites with microtrichial rows laterally. But the new species can be differentiated from shihoae by the following characters: antennal segment II brown (yellow in shihoae ), antennae 8-segmented (in contrast to 7-segmented or with partial suture), postocular setae III longer than I (I longer than III in shihoae ), tergite X without median split (X with median split in distal half to third in shihoae ). Moreover, the male of the new species differs from that of shihoae by the absence of microtrichial rows and discal setae on abdominal tergites (present in male of shihoae ), and the hypomere is dilated at apex (not dilated at apex in shihoae ).

Figures

FIGURES 1-9: Mycterothrips nainiae sp. n. (1) Female; (2) Male; (3) Head and pronotum, female; (4) Meso- and metanota, female; (5) Tergites VIII–X, male; (6) Tergites VIII–X, female; (7) Fore wing, female; (8) Antennae, female; (9) Antennae, male.