Pezothrips frontalis (Uzel)

Masumoto, Masami & Okajima, Shûji, 2020, Two new species of Pezothrips (Thysanoptera, Thripidae) in Japan and Europe, with designation of lectotype of type species, Zootaxa 4743 (1), pp. 75-91 : 78

Pezothrips frontalis (Uzel)

( Figs 7 , 38–46 )

Physopus frontalis Uzel, 1895: 128 .

Female microptera. Body length 1.2–1.3 mm. Body uniformly dark brown ( Fig. 7 ); head often yellowish between compound eyes dorsally; femora dark brown, tibiae and tarsi yellow. Antennal segments I–II dark brown, III yellow, IV–V pale brown each with basal third yellow, VI–VIII brown with extreme base of VI yellowish. Prominent body setae dark. Head slightly prolonged anteriorly, 0.7–0.8 times as long as width, sculptured with transverse anastomosing striae behind postocular setae, ocellar triangle smooth; postocular setae arranged almost in a transverse line; ocelli small, ocellar setae I absent, ocellar setae III just outside anterior margin of ocellar triangle, in front of hind ocelli ( Fig. 38 ). Antennal segment II with a few weak microtrichia, III–IV each with distinct apical neck, IV–VI pedicelate, setae on III and IV slightly stouter than on other segments ( Fig. 39 ). Antennal segments I–VIII length/width ratio as follows: 0.8, 1.3, 2.2, 2.2–2.5, 2.0–2.3, 2.8, 1.7, 4.0. Pronotum 0.7 times as long as width, sculptured with transverse anastomosing striae anteriorly or posteriorly, with about 25 discal setae, median discal setae about 0.07 times as long as pronotal median length; posteroangular setae I about 0.6 times as long as pronotal median length and slightly longer than setae II; posteromarginal setae 2 pairs, S1 setae much longer than S2 setae. Mesonotum with transverse striae throughout, paired CPS anteromedially; median pair of setae near posterior margin. Metascutum often incompletely divided from narrow transverse scutellum, sculptured with transverse striae; median pair of setae behind anterior margin and wide apart from each other, 0.4–0.5 times as long as metascutal median length and not reaching posterior margin; paired CPS present ( Fig. 40 ). Abdominal tergites II–VIII sculptured with transverse anastomosing striae across the tergites in front of S1 setae, lateral sculpture not extending to S1 setae, discal setae arranged almost in a transverse line, S1 setae slightly shorter than S2 setae ( Figs 41, 42 ); tergites VI–VIII with S4 setae reduced to minute; tergite VIII with scallops having small teeth at posterior margin; tergite IX with 2 pairs of CPS, MS2 setae; sternite VII with S1 setae far from posterior margin and closer to each other than to S2 setae ( Fig. 43 ). Ovipositor 1.9 times as long as pronotal median length.

Female macroptera. General structure and body colour same as micropterous female, but fore wing shaded with base pale ( Fig. 8 ); metascutum completely divided from scutellum, reticulate medially, median pair of setae closer than in microptera ( Fig. 44 ); fore wing first vein with 22–25 setae, second vein with 9 setae.

Measurements (lectotype female in microns). Distended body length 1200. Head length 108, width across cheeks 143; compound eyes dorsal length 63, width 50?; ocellar setae III length 63–64, interval 25. Pronotal median length 143, width 200; posteroangular setae I length 75–76, setae II length 56–56, posteromarginal setae I 25–30. Metascutal median length 60; median setae length 28. Abdominal tergite IX median length 90; S1 setae 136–?, S2 setae 155, S3 setae 153?–168, MD setae 44; tergite X median length 78; S1 setae 125?–142, S2 setae length 143–148. Ovipositor length 270. Antennal segments I–VIII length (width) as follows:? (?),? (?), 59 (26), 53 (24), 43 (19), 55 (20), 13 (8), 20 (5).

Male microptera. General structure same as micropterous female, but smaller and paler. Head and thorax pale brown with anterior half of head yellow, abdominal segments I–VIII dark brown, tergites IX and X yellow; all legs yellow ( Fig. 9 ); abdominal tergites sculptured with transverse striae throughout; tergite IX with a pair of small tubercle at posterior margin ( Fig. 45 ); sternal pore plates appear to be larger than in other species ( Fig. 46 ), diameter about 6 micron.

Measurements (male in microns). Distended body length 1050. Head length 105, width across cheeks 148; compound eyes dorsal length 60, width 38; ocellar setae III length 33–43, interval 29. Pronotal median length 125, width 178; posteroangular setae I length 58–59, setae II length 45–58, posteromarginal setae I 18–20. Metascutal median length 50; median setae length 15. Antennal segments I–VIII length (width) as follows: 28 (33), 33 (25), 50 (20), 50 (20), 35 (16), 53 (16), 11 (8), 20 (5).

Specimens examined. Bohemia. Lectotype female and paralectotype female on a single slide ( NMC). AUSTRIA, Oberösterreich, Klaus : 4 females (1 microptera, 3 macroptera on single slide), gekäschert [=swept], 13.vi.1920, H. Priesner ( SMF). 1 female (microptera) same data and collector ( NHM). Gründleg, Linz: 1 female (microptera) and 1 male on single slide, im Rasen [=in turf], 4.ix,1921, H. Priesner ( SMF). 1 female (microptera) and 1 male on single slide, same data and collector ( NHM).

Comments. Micropterous female is very similar to the micropterous species P. pediculae and P. kaszabi in hav- ing tergite VIII without a posteromarginal comb, but they can be distinguished by the key above. The male of this species is yellow on the anterior half of the head and abdominal tergites IX and X, whereas P. pediculae is uniformly brown. Moreover, the sternal pore plates of this species are larger than in P. pediculae .

Figures

FIGURES 1–17. Pezothrips species. P. bactrianus, 1–3. (1) Paratype, female; (2) Allotype, male; (3) Male from Turkey. (4) P. cereus, paratype female. P. dianthi, 5–6. (5) Female; (6) Male. (7) P. frontalis, 7–9. (7) Lectotype female; (8) Female macroptera; (9) Male microptera. (10) P. kaszabi, holotype female. (11) P. moravicus, holotype female. P. nadeshiko, n. sp., 12–14. (12) Holotype female; (13) Paratype female; (14) Paratype male. (15) P. nigriventris, holotype female. P. pelikani, n. sp., 16–17. (16) Lectotype female; (17) Slide of lectotype, red arrow indicates lectotype.

FIGURES 38–46. Pezothrips frontalis in SMF, female microptera, 38–43. (38) Head and pronotum; (39) Antenna; (40) Meso- and metanota; (41) Tergite II; (42) Tergites VII–X; (43) Sternite VII (sculpture omitted). (44) Metascutum, female macroptera, sculpture omitted. Male, 45–46. (45) Tergite IX; (46) Sternite VI (sculpture omitted).