Mycterothrips grandis, Okajima, 2006

Okajima, Masami Masumoto And Shûji, 2006, A revision of and key to the world species of Mycterothrips Trybom (Thysanoptera, Thripidae), Zootaxa 1261 (1261), pp. 1-90 : 58-61

Mycterothrips grandis sp. nov.

( Figs. 87–91)

Mycterothrips sp. ; Okajima, 2000: 101.

Description. Female. Distended body length 1.4–1.7 mm. Body uniformly yellow; antennal segments I to VIII pale brown to brown, III paler in basal third, IV and V paler at base; all legs yellow; fore wings uniformly slightly shaded; prominent body setae shaded.

Head 1.1–1.3 times as wide as long, cheeks almost straight and slightly convex. Ocellar setae I absent, setae III situated near anterior margin of posterior ocelli and 4.6–8.0 times as long as distance between their bases. Postocular setae I the longest, setae II minute ( Fig. 87). Antennal segment II without mid­dorsal seta, III and VI subequal in length, and the longest ( Fig. 88). Antennal segments I to VIII length/width as followings; 0.9–1.0, 1.3–1.5, 3.1–3.6, 2.6–3.1, 1.9–2.5, 2.8–3.7, 0.8–1.3, 2.3–4.0.

Pronotum 1.3–1.5 times as wide as long, weakly sculptured with anastomosing striae, with 11–13 discal setae (holotype 13); anteromarginal median setae much longer than discal setae and subequal in length to posteromarginal setae I; posteroangular setae I almost as long as setae II and 0.5–0.6 times as long as pronotal median length; posteromarginal setae I 2.0–3.0 times as long as setae II and 0.3–0.4 times as long as pronotal median length ( Fig. 87). Mesonotum without anteromedian CPS; median pair of setae near posterior margin ( Fig. 89). Metascutum weakly reticulated medially; median pair of setae near anterior margin and 0.5–0.7 times as long as metascutal median length ( Fig. 89). Fore wings with 23–26 setae on costal vein (holotype 23) and 9–13 setae on second vein (holotype 10); clavus with veinal setae 3–5 (holotype 4).

Abdominal terga and laterotergites without ciliate microtrichia on lines of sculpture, a few lines of sculpture slightly extending mesad of B2 setae on terga II to VII ( Fig. 91), posterior margin of terga VI and VII with microtrichia developed laterally; tergum II with four lateral marginal setae ( Fig. 90), terga V to VIII with B4 setae minute gradually ( Fig. 91); tergum IX with posterior pair of CPS only; B1 setae, B2 setae and B3 setae 1.1–1.2 times, 1.1–1.5 times and 1.0–1.2 times as long as tergum IX median length, respectively (both B1 setae slightly lost at apex in holotype) ( Fig. 91); tergum X with weak median slit at apex ( Fig. 91); sterna without discal setae; sterna III to VII sometimes with seven setae on posterior margin. Ovipositor 2.0–2.2 times as long as pronotal median length.

Measurements (in µm). Holotype (female). Distended body length 1,605. Head length (width across cheeks) 125 (158); compound eye dorsal length (width) 70 (45); ocellar setae III length (interval) 80 (18). Pronotal median length (width) 145 (208); posteroangular setae I length 76, setae II length 75; posteromarginal setae I length 46, setae II length 23. Metascutal median length 70; median pair of setae length 50. Fore wing length 950. Tergum IX median length 105, B2 setae length 135, B3 setae length 113. Ovipositor length 305. Antennal segments I to VIII length (width) as follows: 33 (33), 43 (30), 68 (20), 60 (23), 43 (20), 68 (20), 13 (10), 23 (8).

Male. unknown.

Type series. Japan: Holotype (female), Tokyo, The Imperial Palace, Fukiage­gyoen , host unknown, 15­v­1996, S. Okajima . Paratypes: 5 females, same data as the holotype. 10 females, Chiba Pref., Narita City, Otake, nr. Imba­numa , on leaves of Styrax japonica [ Styracaceae ], 7­v­2001, M. Masumoto. 1 female, Kanagawa Pref., Yokohama City, Kanazawa­shizenkouen park, on leaves of Quercus glauca [ Fagaceae ], 1­v­2005, M. Masumoto. 2 females, Fukuoka Pref., Mt. Tachibana , yellow pan trap, 16­vi­1979, K. Yamagishi .

The holotype and most paratypes are deposited in TUA, Atsugi , Japan .

Comments. This species can be distinguished easily from other members by lacking ocellar setae I and mid­dorsal seta on antennal segment II, uniformly yellow large body, major setae on body and long and stout fore wings. The relationships with other members of the genus are not clear.

Etymology. In reference to the large body and stout setae of the species.