Hydatothrips ormosiae, Mirab-Balou, Majid, Yang, Shu-Lan & Tong, Xiao-Li, 2013

Mirab-Balou, Majid, Yang, Shu-Lan & Tong, Xiao-Li, 2013, One new species, four new records and key to species of Hydatothrips (Thysanoptera: Thripidae) from China (including Taiwan), Zootaxa 3641 (1) : -

Hydatothrips ormosiae sp. n.

( Figs. 2–15 )

Female macroptera. Body bicolored ( Fig. 2 ); dark brown on head, pronotal blotch, meso- & metanotum, metasternum, abdominal segments VII–IX, antennal segments IV–VII except base of III yellowish brown ( Fig. 15 ); brown on antennal segment III, middle of mid- and hind femora, and abdominal segments II–IV & X; yellow on antennal segments I–II, fore tibiae with brown marking laterally, and mid- and hind tibiae and tarsi; yellowish white on abdominal segments V & VI. Fore wing dark brown with subbasal and subapical pale areas.

Head short, with dense transverse striae and wrinkles between them, with 3–5 pairs of postocular setae ( Fig. 3 ); occiput very short, with dense transverse striae, occipital apodeme not reaching posterior margin of eyes; three pairs of ocellar setae present, ocellar setae pair III situated outside or near ocellar triangle, in front of posterior ocelli. Maxillary palps 3-segmented, first segment longest; mouth cone long and pointed, reaching to posterior margin of prosternum, or sometimes a little longer. Antennae 7-segmented, with long forked sensoria on antennal segments III and IV ( Fig. 12 ); segments II–VI covered with rows of microtrichia on both dorsal and ventral surfaces, segment VI with normal simple sensorium, not leaf-shaped ( Fig. 9 ).

Pronotum with reticulate sculpture outside of blotch, anteromarginal median setae wide apart; blotch with anterior margin straight, but strongly concave posteriorly, covered with dense transverse striae ( Figs. 5 , 14 ), one pair of anteromarginal median setae, 2 pairs of anterior submarginal setae, one pair of anterior angular setae, and one pair of posteromarginal setae. Mesonotum and metanotum with dense striae and few wrinkles. Mesonotum with a median pair of setae in the middle of sclerite, and one pair of setae laterally, near posterior margin ( Figs. 6 , 13 ); metanotum with median setae at anterior margin, without campaniform sensilla (CPS) ( Fig. 7 ). Tegula without microtrichia. Metasternum divided as V-shaped ( Fig. 10 ). Fore wing with almost complete row of setae (23–25 setae) on first vein, second vein with 2 distal setae ( Fig. 16 ); clavus with 4 marginal setae and 1 discal seta. Tarsi 2- segmented.

Abdominal tergites I–VII with dense rows of microtrichia lateral thirds, tergites I–VII with posteromarginal comb laterally, microtrichia lacking or minute ( Fig. 8 ); tergite VIII with posteromarginal comb complete ( Fig. 11 ); tergites II–VII with antecostal ridge, darker on tergite VII; tergites II–VII with S1 (median setae) and S2 situated behind antecostal ridge, on VIII in middle of sclerite; tergites II–VI with 3–4 lateral discal setae; tergite X with rows of microtrichia on posterior half. Abdominal sternites II–VI with three pairs of setae on posterior margin, VII with three pairs of setae in front of posterior margin. Ovipositor well developed.

Measurements (holotype female). Length (width). Body length 1275; head 194(81); pronotum 230(109), blotch median length 32; fore wing 873(53), hind wing 739. Antennal segments I–VII: 28(30), 46(27), 84(21), 84(19), 52(16), 62(16) and 28(7); forked sensorium on antennal segment III length 77, on IV 70.

Male macroptera ( Fig. 2 ). Similar to female in color and structure; head with postocular setae pair III smaller in contrast to female ( Fig. 4 ); pronotal blotch yellow (a little paler than surrounding area); abdominal segments V– VII yellowish white; abdominal tergite IX with S1 as long as S2 but a little behind of S2; sternite III with very small circular pore plate.

Measurements (paratype male). Length (width). Body length 1052; fore wing length 688 (38); antenna length 344.

Material studied. Holotype female (in SCAU): CHINA, Guangdong Province: Changban Park (23°10' 29″N, 113°21'00″E), Guangzhou, from Ormosia pinnata (Fabaceae) , 21.x.2012, coll. Yang Shulan.

Paratypes (in SCAU): 4 females, 3 males, collected with holotype, with same data.

Etymology. This species is named after the genus of plant from which it was collected.

Remarks. Among Chinese Hydatothrips , this new species is unique because of the banded fore wing, and the 7-segmented antennae distinguish it from most other species in the genus apart from longjingensis , meriposa and noro . This species can be distinguished from these three species by the number of setae on the fore wing second vein and the shape of the pronotal blotch.

This species can be distinguished from H. latisensibilis Kudô by the normal shape of the sensorium on antennal segment VI (vs. segment VI with a large, leaf-shaped sensorium, about same length as segment VII in H. latisensibilis ); male with very small pore plate on abdominal sternite III (vs. with very large pore plate on sternites III–VII in H. latisensibilis ). It was also readily distinguished from H. karnyi by tegula without microtrichia (vs. with tegula in karnyi ), and fore wing dark brown with subbasal and subapical pale areas (vs. fore wing hyaline, with the base and a median cross-band gray in karnyi ).

Host plant. Ormosia pinnata (Fabaceae) .

Distribution. China (Guangdong Province).

Acknowledgements

We would like to thank Professor Zhang Wei-qiu, South China Agricultural University for his useful advices. Thanks also to Ms. Chen Xinfang, The Instrumental Analysis & Research Center (SCAU), for assistance with the SEM. The first author would like to thanks Professor Chen Xue-xin (ZJUH) for supporting in ZJUH and to Professor Ji–nian Feng for supplying some specimens when visited NWAFU in 2010. We are grateful to Dr. L.A. Mound for his critical comments on an early version of the manuscript; and to anonymous reviewer for useful comments. This study was supported by Special Fund for Agro-Scientific Research in the Public Interest (No. 200803025 and 201103026).

Figures

FIGURE 2. Hydatothrips ormosiae sp. n.: Female (left), Male (right).

FIGURES 3 – 10. Hydatothrips ormosiae sp. n.: 3 – 4. Head: (3) Female, (4) Male; (5) Pronotum, female; (6) Mesonotum; (7) Metascutum; (8) Abdominal tergites V – VII; (9) Antennal segments VI & VII; (10) Metasternum.

FIGURES 11 – 16. Hydatothrips ormosiae sp. n.: (11) Abdominal tergites VIII – X; (12) Antennal segments III & IV, showing forked sensorium; (13) Mesonotum; (14) Pronotum, showing blotch; (15) Antenna; (16) Fore wing, showing two setae on second vein.