Neohydatothrips magnoliae, Zhang, Hongrui, Xie, Yonghui & Li, Zhengyue, 2012

Zhang, Hongrui, Xie, Yonghui & Li, Zhengyue, 2012, A new leaf-feeding species of Neohydatothrips from southwestern China (Thysanoptera: Thripidae), Zootaxa 3180, pp. 61-65 : 62-64

Neohydatothrips magnoliae sp. n.

( Figs. 1–10 )

Female macroptera. Body strongly bicoloured ( Fig. 1 ). Antennal segments I & II yellow, III–VIII brown except III & IV yellow at base ( Fig. 7 ); head dark brown but yellow at postoccipital region ( Fig. 3 ); pronotum dark brown; mesonotum pale brown; metanotum brown but sharply paler at posterior half ( Fig. 4 ); legs mainly brown, apex of tibiae paler, tarsi yellow; fore wings with pale sub-basal area then uniformly brown, base dark including clavus ( Fig. 1 ); abdominal segments I–IV brown but paler medially, V–VI yellow, VII–X dark brown; tergites II–VII with dark antecostal line ( Fig. 8 ).

Antennae 8-segmented, segments III & IV with forked sensorium ( Fig. 7 ). Head wider than long, with closely spaced transverse lines within ocellar triangle; occipital apodeme close to, but not touching, posterior margin of eyes ( Fig. 3 ); ocellar setae I present; three pairs of ocellar setae, pair III lateral to triangle; three pairs of postocular setae, median pair longest and arising postero-laterally to posterior ocelli; post-occipital region with broad band of transverse narrow reticulation ( Fig. 3 ). Pronotum anterior third transversely reticulate with few internal markings; blotch transversely striate with many markings between the major lines; anterior margin of blotch straight or slightly concave medially; posterior margin of blotch straight; one pair of long major posteroangular setae; posterior margin with one pair of short setae ( Fig. 5 ). Mesonotum with closely spaced striations, and small lines between the major striae. Metanotum with linear reticulation, many small linear markings between the major sculpture lines, median setae situated on anterior margin, arising more distant to each other than to lateral pair ( Fig. 4 ). Meso-furca with spinula, meta-furca without. Metasternal anterior margin with broad but shallow V-shaped emargination ( Fig. 6 ). Fore wing first vein with setal row complete, no setae on second vein. Abdominal tergite I medially without marginal microtrichia, II–VIII with complete row of marginal microtrichia, shorter medially on II–VI ( Figs 8–9 ); tergite I with discal microtrichia laterally only, II–VIII with microtrichia extending medially near anterior margin but progressively more extensive on posterior segments ( Figs 8–9 ); tergites IX–X with no discal microtrichia ( Fig. 9 ); sternites without discal setae, VII with three pairs of posteromarginal setae arising in front of posterior margin ( Fig. 10 ); sternites with discal microtrichia present only laterally, II–VII with marginal microtrichia present lateral to median pair of marginal setae ( Fig. 10 ).

Measurements (holotype female in microns). Body length 1337. Head, length 260; width across eyes 184. Ocellar setae II length 23; ocellar setae III length 20; postocular setae I length 25. Pronotum, length 128; width 238. Metanotum median setae length 33. Fore wing length 990. Abdomen length 900. Antenna length 343; segments III–VIII length 63, 69, 53, 56, 12, 13.

Male macroptera. Similar to female but smaller. Abdominal sternites without pore plates ( Fig. 2 ).

Measurements (paratype male in microns). Body length 1038. Head, length 213; width across eyes 160. Ocellar setae II length 22; ocellar setae III length 19; postocular setae I length 24. Pronotum, length 110; width 190. Metanotum median setae length 23. Fore wing length 733. Abdominal length 643. Antennal length 294; segments III–VIII length 50, 56, 43, 49, 9, 11.

Specimens examined. Holotype female, CHINA, Yunnan Province, Kunming City, Arboretum, (25° 08' N, 102° 44' E, 1956 m H), from the young leaves of Parakmeria yunnanensis (Magnoliaceae) , 8.viii.2010, Xie Yong- Hui, in Yunnan Agricultural University, Kunming.

Paratypes: 28 females, 16 males, collected with holotype; paratypes deposited in Australian National Insect Collection, Canberra.

Etymology. The species is named after its host plant, Magnoliaceae , a family of primitive angiosperms Magnoliales .

Comments. This new species is similar in colour and the sculpture of the mesonotum and metanotum to samayunkur (Kudo) , a species that is widespread around the world on Tagetes (Asteraceae) ( Mound & Tree, 2009) . However, it differs from samayunkur in having the fore wings dark with only the sub-basal area pale ( Fig. 1 ), instead of three pale areas, and antennal segment V and the anterior area of the pronotum are dark. Moreover, on the head the postoccipital apodeme is closer to the compound eyes, and the ocellar region has transverse lines of sculpture instead of irregular lines. Although similar to elaeagni (Kudo) , it is distinguished from that species by the yellow abdominal segments V–VI ( Fig. 8 ), and both anterior margin and posterior margin of the blotch are straight or slightly concave medially ( Fig. 5 ). It shares many morphological characters with trypherus (Han) , but differs from trypherus in having the anterior margin of the blotch straight or slightly concave medially ( Fig. 5 ). It is distinguished from plynopygus (Karny) since the latter has: (i) antennae 7-segmented, (ii) median pair postocular setae not long and arising behind posterior ocelli, (iii) anterior margin of blotch sharply concave medially.

Figures

FIGURES 1 – 7. Neohydatothrips magnoliae. (1) Dorsal view of female. (2) Dorsal view of male. (3) Dorsal view of head. (4) Mesonotum and metanotum. (5) Pronotum. (6) Metasternum. (7) Left antenna.

FIGURES 8 – 10. Neohydatothrips magnoliae. (8) Abdominal tergites I – VI. (9) Abdominal tergites VII – X. (10) Abdominal sternites V – VII.