Odontothrips hani Hu

Hu, Qing-Ling, Mirab-Balou, Majid, Chen, Xue-Xin & Feng, Ji-Nian, 2012, A new species and two new synonyms from China in the genus Odontothrips (Thysanoptera: Thripidae), Zootaxa 3259, pp. 58-63 : 58-60

Odontothrips hani Hu , Mirab-balou, Chen & Feng, sp. n.

( Figs. 1–13 )

Male macroptera. Body brown to dark brown ( Fig. 2 ); all tarsi yellow, also fore tibiae, apex of fore femora, antennal segment III and base of antennal segment IV ( Fig. 8 ); fore wing pale brown, with apical and median band brown, basal quarter and clavus completely white ( Fig. 2 ).

Head. Head 1.4–1.5 times as wide as long; three pairs of ocellar setae present, pair III long and situated outside of ocellar triangle, postocular setae small. Maxillary palps 3-segmented. Antennae 8-segmented, segment I with one pair of dorso-apical setae; segments III and IV with forked sense cones; segments III–VI with rows of microtrichia dorsally and ventrally; segment VI the longest, with base of external sensorium enlarged, about 0.8 times as long as total length of this sensorium. Ratio length/width of antennal segments I–VIII as follows: 0.9, 1.6, 3.2, 2.9, 2.5, 3.3, 1.7 and 4.0.

Thorax. Pronotum 1.6 times as wide as long, with about 14–18 discal setae; inner posteroangular setae about 1.4 times as long as outer setae. Ferna undivided and with small teeth on upper side. Mesonotum sculptured, with a pair of campaniform sensilla (CPS) antero-medially; median pair of setae situated near posterior margin. Metascutum reticulated; median pair of long setae situated at anterior margin; CPS present. Mesosternum with spinula, metasternum without spinula. Fore tibia and fore tarsus each with a very small tubercle at apex. Fore wing first vein with 4 basal setae, then 11–12 setae and 2 distal setae; second vein with complete row of setae, about 14– 16 setae; clavus with 5 veinal setae and one discal seta.

Abdomen. Abdominal tergite I with transversely reticulate sculpture; tergites II–VIII with no sculpture medially; tergal median setae (S1) smaller than S2; tergite IX with median pair of setae normal, not stout ( Fig. 2 ). Abdominal sternites without pore plates. Genitalia bearing two pairs of endothecal stout spines ( Fig. 13 )

Measurements (Holotype male in microns). Length (width). Body 960(195); fore wing 675(45); antennal segments I–VIII: 24(28), 33(24), 58(17), 51(20), 36(16), 54(18), 9(8), 16(4); sensorium on antennal VI length 20, length of base 16.

Female macroptera. Body very similar to male but larger ( Fig. 1 ); color of body as in male ( Figs 1, 3–7 ). Abdominal tergite IX with two pairs of CPS; tergite X with short median split, sternite VII with median pair of setae situated anterior to posterior margin ( Fig. 10 ). Ovipositor well-developed.

Measurements (Paratype female in microns). Length (width). Body 1700(295); head 125(180); ocellar setae III 75; pronotum 150(240); posteroangular setae (outer) 60, inner setae 85; fore wing 780(55); antennal segments I–VIII: 28(32), 40(25), 65(20), 58(20), 41(17), 62(19), 11(6), 16(4); sensorium on antennal VI length 28, length of base 24.

Material studied. Holotype male: CHINA, Haidian, Beijing (alt. ca 63m), on alfalfa, Medicago sativa (Fabaceae) , Shu-Jun Wei, 23.vi.2010 (in ZJUH). Paratypes: Collected with holotype, 1 female, 2 males (in ZJUH); CHINA, Shaanxi Province, Cuihua Mountain (alt. ca 860m), 1 female on Vigna sinensis, Qing-Ling Hu , 3.vi.2010 (in NWAFU).

Distribution. China: Beijing, Shaanxi.

Host plants. Of the five available specimens, one were collected from the flowers of Vigna sinensis and four from Medicago sativa flowers.

Etymology. This species is named in honor of the Chinese thrips expert, Prof. Yun-fa HAN (retired professor of Institute of Zoology, Academia Sinica, Beijing-China).

Remarks. This new species is very similar to O. meridionalis Priesner. The females are not readily distinguishable, but the male can be distinguished easily from meridionalis as follows: tergite IX with median setae (S1) slender ( Fig. 2 ), while very short and stout in meridionalis (see zur Strassen, 2003, Fig. 627). O. hani can be distinguished from the other Odontothrips species reported from China by the presence of small tubercles on distal inner margin of fore tarsus ( O. intermedius , O. confusus , O. pentatrichopus , O. phaseoli and O. mongolicus ), and by the presence of one small tubercle on the distal inner margin of the fore tarsus and fore tibia ( O. biuncus and O. loti ) ( Dang et al., 2010). According to the description in Xie et al. (2010), this new species is similar to O. yunnanensis , but can be distinguished as follows: fore tibia and tarsus with small tubercle in inner margin (vs. the lack of fore tibial tubercles in yunnanensis ); fore wing first vein with two distal setae (vs. with several setae in yunnanensis ); male with antennae similar in color to female (vs. male with antennal segments II-III yellow but female with only III yellow in yunnanensis ). The new species is also similar to O. meliloti , but that has the forewing distinctly shaded and paler at base, and the male O. hani has two pairs of endothecal spines whereas that of O. meliloti has three to four pairs ( Pitkin, 1972).

Figures

FIGURES 1 – 6. Odontothrips hani sp. n.: 1 – 2: Adult: (1) female, (2) male (Scale bar = 100 microns). (3) head; (4) pronotum; (5) fore leg; (6) antennal segments VI-VIII (Scale bar = 30 microns).

FIGURES 7 – 13. Odontothrips hani sp. n.: 7 – 8: Antenna: (7) female, (8) male. (9) abdominal tergite VI; (10) abdominal sternite VII; (11) forewing; (12) metascutum; (13) endothecal spines on male genitalia (Scale bar = 30 microns).