Pezothrips nadeshiko, Masumoto & Okajima, 2020

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 : 79-83

Pezothrips nadeshiko n. sp.

( Figs 12–14 , 62–70 )

Female macroptera. Distended body length 1.5–1.7 mm. Body almost uniformly brown, but often abdomen slightly darker; antennal segments I–II brown, III–IV yellow, V yellow with distal half slightly shaded, VI brown with basal half yellowish, VII–VIII brown; fore wings including clavus pale with median area slightly shaded; all femora yellowish brown to brown, fore tibiae brownish yellow, mid and hind tibiae brownish yellow or brown with apices yellowish, often darker at basal half, all tarsi brownish yellow; prominent body setae brown to dark brown ( Figs 12, 13 ). Head 0.7–0.9 times as long as width, sculptured with widely spaced transverse anastomosing striae at basal fourth dorsally, smooth within ocellar triangle, cheeks almost straight ( Fig. 62 ). Ocellar setae III outside of ocellar triangle and in front of hind ocelli, 1.0–1.8 times as long as interval. Antennal segment II without microtrichia, III and IV with weak apical neck and with setae normal not stout, IV–VI weakly pedicelate, VI longest, often subequal in length to III, gently rounded at each side ( Fig. 63 ). Antennal segments I–VIII length/width ratio as follows: 0.8, 1.2–1.3, 2.4–2.8, 2.3–2.4, 1.9–2.1, 2.4–2.9, 1.3–1.5, 3.3–3.8. Pronotum about 0.7 times as long as wide, sculptured with transverse anastomosing striae but weak medially, with 16–20 small discal setae; posteroangular setae I 0.4–0.6 times as long as pronotal median length and longer than setae II; posteromarginal setae three pairs, setae I longest. Mesonotum sculptured with transverse anastomosing striae; CPS present anteromedially; median and submedian setae almost in transverse line ( Fig. 64 ). Metascutum with median pair of setae 0.5–0.7 times as long as metascutal median length; CPS present. Fore wing costal vein with 18–21 setae, second vein with 9–12 setae; clavus with five (rarely four) veinal setae. Abdominal tergites laterally with lines of sculpture, a few lines across between S1 setae ( Figs 65, 66 ); tergite VI–VIII with S4 setae reduced to minute; tergites VII–VIII with S2 setae much longer than S1 setae and reaching at or slightly exceeding tergal posterior margin; tergite VIII with complete posteromarginal comb, microtrichia long with wide base but a few median microtrichia often short or rarely reduced to a wide base; tergite IX with both anterior and posterior pairs of CPS; sternum VII with S1 setae much closer to each other than to setae S2 ( Fig. 67 ). Ovipositor 1.8–1.9 times as long as pronotal median length.

Measurements (holotype female in microns). Distended body length 1670. Head length 113 (length including anterior prolongation 118), width across cheeks 152; compound eyes dorsal length 68, width 38; ocellar setae III length 50–57, interval 35. Pronotal median length 133, width 183; posteroangular setae I length 69–74, setae II length 54–58, posteromarginal setae I 25–28. Metascutal median length 66; median setae length 43–45. Fore wing length 670, width at middle 45. Abdominal tergite IX median length 86; S1 setae 128–130, S2 setae 142–143, S3 setae 141–143, MD setae 53–58; tergite X median length 77; S1 setae 139–140, S2 setae length 135–138. Ovipositor length 250. Antennal segments I–VIII length (width) as follows: 25 (33), 38 (29), 53 (19), 48 (20), 40 (20), 53 (19), 10 (8), 19 (5).

Male macroptera. Distended body length about 1.2 mm. Body colour paler than female ( Fig. 14 ). Abdominal tergite IX without tubercles at posterior margin ( Fig. 68 ).

Measurements (paratype male in microns). Distended body length 1170. Head length 93 (length including anterior prolongation 98), width across cheeks 126; compound eyes dorsal length 58, width 36; ocellar setae III length 33–43, interval 29. Pronotal median length 105, width 155; posteroangular setae I length 42–54, setae II length 19–37, posteromarginal setae I 35–15. Metascutal median length 53; median setae length 26–30. Fore wing length 500, width at middle 40. Antennal segments I–VIII length (width) as follows: 25 (29), 30 (25), 53 (19), 43 (16), 35 (18), 44 (16), 10 (6), 15 (5).

Type series. Holotype female, JAPAN, Honshu, Hiroshima Pref., Mihara City, Hongo-cho , on leaves of Dianthus superbus var. longicalycinus [ Caryophyllaceae ], 3.iii.2007, H. Akashi . Paratypes: 1 female collected together with holotype ; 1 female, same locality and plant as holotype, 11.vi.2007, H. Akashi ; 2 females, 1 male, same locality and plant as holotype, 3.vii.2007, H. Akashi ; 40 females, 8 males, same locality and host plant as the holotype, 23.v.2008, Y. Kojima. Hiroshima Pref., Higashi-hiroshima City, Saijo-cho , 13 females on leaves of Dianthus superbus var. longicalycinus , 9.vi.2008, Y. Kojima. Osaka-fu, Sakai-shi, 3 females, 5 males on flower & leaf of D. superbus var. longicalycinus , 10.vi.2015, Y. Kojima. The holotype and most paratypes are deposited in TUA.

Comments. This species is very similar to the Holarctic species P. dianthi , that is also associated with Dianthus , in having the pronotum with three pairs of posteromarginal setae and abdominal tergite VIII with posteromarginal comb complete. In this study, two females (deposited in TUA) and one male (deposited in SMF) of P. dianthi from Dianthus carthusianorum at Rotenfels, Germany were compared with this new species. In P. dianthus , setae on antennal segments III are distinctly stouter, almost 1.5 times as broad as that on P. nadeshiko and an angle to the segment of pedicel on antennal segment VI is more gentle than in P. nadeshiko .

Etymology. In reference to Japanese name of the host plant.

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 62–70. Pezothrips nadeshiko, n. sp., female, 62–77. (62) Head and pronotum; (63) Antenna; (64) Mesonotum and metascutum; (65) Tergite II; (66) Tergites VIII–X; (57) Sternite VII (sculpture omitted). Male, 68–70. (68) Tergite IX (sculpture omitted); (69) Sternite VII; (70) Genitalia (hypomere & parameres), left aspect.