Mycterothrips yamagishii, 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 : 84-87

Mycterothrips yamagishii sp. nov.

( Figs. 147–151)

Description. Female. Distended body length about 1.4 mm. Body generally brownish yellow, abdominal terga I to VIII each with brown at anterior half lateral to B2 setae; antennal segment I yellow, II and V to VIII dark brown, III dark brown with apex and base pale, IV dark brown with extreme base pale; all legs pale yellow; fore wings and scale uniformly slightly shaded; prominent body setae dark.

Head 1.2 times as wide as long, cheeks slightly rounded. Ocellar setae III at tangent of anterior margin of posterior ocelli and 6.1 times as long as distance between their bases; all postocular setae subequal in length ( Fig. 147). Antennae usually 8­segmented, III the longest, III and IV tapering to neck­like distal third, VII with outer sense cone short and not reaching apex ( Fig. 148). Antennal segments I to VIII length/width; 1.1, 1.4, 2.8, 2.8, 2.0, 2.6, 1.0, 3.5.

Pronotum 1.3 times as wide as long, almost smooth medially, with 42 discal setae; posterogangular setae I almost as long as setae II and 0.5 times as long as pronotal median length; posteromarginal setae I 2.2 times as long as setae II and 0.2 times as long as pronotal median length ( Fig. 147). Mesonotum with anteromedian CPS; median pair of setae in front of posterior margin (left seta far from, right seta slightly ahead of lateral seta) ( Fig. 149). Metascutum sculptured transversely at middle; median pair of setae slightly behind anterior margin and 0.6 times as long as metascutal median length ( Fig. 149). Fore wings with 24 setae on costal vein and 13 setae on second vein.

Abdominal terga VII to VIII with relatively many microtrichial along lines of sculpture, microtrichia more or less ciliate on terga VI to VIII ( Figs. 150–151) but weak and dentate at anterior terga, a few lines of sculpture extending slightly mesad of B2 setae on terga III to VII ( Fig. 150), posterior margin of terga I to VII without microtrichia laterally ( Fig. 150); tergum II with four lateral marginal setae; terga VI to VIII with B4 setae minute; tergum IX with posterior pair of CPS only; B1 setae, B2 setae and B3 setae 0.9 times, 1.7 times and 1.5 times as long as tergum IX median length, respectively ( Fig. 151); tergum X without median slit ( Fig. 151); sterna without discal setae. Ovipositor 1.7 times as long as pronotal median length.

Measurements (in µm). Holotype (female). Distended body length 1,405 Head length (width across cheeks) 125 (158), compound eye dorsal length (width) 70 (43), ocellar setae III length (interval) 61 (10). Pronotal median length (width) 165 (213), posteroangular setae I length 76, setae II length 72, posteromarginal setae I length 33, setae II length 15. Metascutal median length 98; median setae length 63. Fore wings length 915. Tergum IX median length 98, B1 setae length 86, B2 setae length 170, B3 setae length 148. Ovipositor length 275. Antennal segments I to VIII length (width) as follows: 35 (33), 43 (30), 70 (25), 70 (25), 45 (23), 53 (20), 10 (10), 18 (5).

Male. unknown.

Type series. Japan: Holotype (female), Fukuoka Pref., Mt. Tachibana , yellow pan trap, 16­vi­1979, K. Yamagishi.

The holotype is deposited in TUA, Atsugi , Japan .

Comments. This species is very similar to M. araliae , with the narrowed neck­like apex to antennal segments III and IV and the head with rounded cheeks and stout setae. These two species appear to be closely related,although the male of M. yamagishii is unknown. Females of this new species can be distinguished by having abdominal terga with more regular microtrichial rows, and tergum IX with B3 setae very long.

Etymology. In reference to the name of Dr. Kenzo Yamagishi who collected and supplied the species.