Adraneothrips russatus (Haga) Haga, 2013

Dang, Li-Hong, Mound, Laurence A. & Qiao, Ge-Xia, 2013, Leaf-litter thrips of the genus Adraneothrips from Asia and Australia (Thysanoptera, Phlaeothripinae), Zootaxa 3716 (1), pp. 1-21 : 17-20

Adraneothrips russatus (Haga) comb.n.

( Figs 11, 12 , 23 , 29 , 36 )

Baphikothrips russatus Haga, 1973: 74 .

Stigmothrips russatus (Haga) Okajima, 1976: 129 .

Described originally from Japan, Osaka, but subsequently recorded from the Ryukyu Islands by Okajima (1976), and from several Provinces of southern China by Tong & Zhang (1989), this species is here recorded from Australia, in north and south Queensland as well as Norfolk Island. All of these records are based only on females, and the redescription by Okajima (2006) also refers only to females. However, one male is reported here from Yunnan, southern China. This is a sharply bicoloured species ( Figs 11, 12 ), with antennal segment III clear yellow ( Fig. 23 ), and the metanotum distinctly reticulate ( Fig. 29 ). Specimens of both sexes from Yunnan have antennal segment VI largely yellow but clouded at the apex, whereas specimens from Australia and Japan have this segment brown in the apical half and yellow at the base. Specimens from Yunnan, Taiwan and Japan have the prothoracic notopleural sutures incomplete, but these sutures are variable in the specimens from Australia, fully complete, nearly complete or incomplete ( Fig. 23 ).

Male macroptera. Similar in structure to female, but smaller and paler; abdominal segments III–IV slightly darker than II, IX brown with apical half yellow; tergite IX posteromarginal setae S2 much shorter and stouter; sternite VIII with pair of pore plates laterally ( Fig. 36 ).

Specimens examined. CHINA. Yunnan Prov. (Mengla County), 2 females, 1 male on unknown grasses and withered tree leaves, 17–22.iv.1997, Y.F. Han (NZMC); Taiwan Prov. (Pingdong County), 17 females on withered tree leaves, 3.ix.2001, 19.i.–21.ix.2002, 16.ii.–11.iii.2003, N.T. Zhang (NZMC). AUSTRALIA, Queensland: Cape Tribulation, 1 female on dead hard leaves, 8.x.2012, 1 female on grasses, 8.vii.1995, 1 female on freshly dead leaves, (LAM); Cairns, Crystal Creek, 4 females on dead palm frond and leafy branch, 4.x.2012 (LAM); Mt Malloy Julatten, 2 females on dead leaves, 5-6.vii.1995 (LAM); Townsville, 1 female from rainforest litter, P. Greenslade; Lamington National Park, O’Reillys, 4 females in leaf litter, vii-viii.2007 (in QDPC); Norfolk Island, 5 females on dead branches and leaves, 1 female on Metrosideros & Ipomoea , 27.xii.2012 (A. Wells); 1 female on dead twigs and leaves, 21.xii.2012, 3 females on dead palm fronds and Cordyline dead leaves, 22.xii.2012, 5 females on Palm & Grevillea dead leaves, 27.xii.2012; 8 females from Eucalyptus dead leaves, 10.vii.2013 (LAM)(ANIC). FIJI, Viti Levu, Nandaravatu, 1 female from base of grasses, 20.iv.1982 (LAM)(ANIC).

Adraneothrips setosus (Okajima) comb.n.

Stigmothrips setosus Okajima, 2006: 595 .

Described from a series of both sexes taken in leaf litter of an evergreen forest at Honshu, Japan, this species is included here based on the original description and illustrations. It is a typical member of the genus, with capitate postocular setae arising behind the inner margins of the eyes, and sternite VIII of males with a pair of pore plates.

Adraneothrips stannardi Ananthakrishnan ( Fig. 13 )

Adraneothrips stannardi Ananthakrishnan, 1969: 290 .

Described from 14 females and one male collected at Madras, the wording of the original description could be read to imply that this mainly yellow species ( Fig. 13 ) is similar to A. bambusae . Moreover, the original illustration indicates that the notopleural sutures are complete, and the description states that there are no duplicated cilia on the fore wings. However, two females collected with the holotype have been studied ( Fig. 13 ), and these have several duplicated cilia, the notopleural sutures are incomplete or weakly complete, and the lateral margins of the head are distinctly shaded brown. This species is similar to coloratus , and both of them have three sensoria on the third and the fourth antennal segments. However, they differ as follows: stannardi – antennal segment III yellow at base with apex shaded brown and no more than 2.0 times as long as wide, segment IV yellow at base, all legs uniformly yellow, anal setae about 1.3 times as long as tube, pelta with campaniform sensilla at least 12 times their diameter apart; coloratus – antennal segment III largely yellow with base distinctly shaded, segment IV uniformly brown, femora and tibiae bicoloured, anal setae a little shorter than tube, pelta with campaniform sensilla less than four times their diameter apart.

Specimens examined. INDIA, Madras, 2 females on Thevetia twigs, 13.ix.1968, T.N. Ananthakrishnan (UMIC).

Adraneothrips waui sp. n. ( Figs 14 , 24 , 31 )

Female macroptera. Body uniformly brown ( Fig. 14 ); antennal segments I–II, VII–VIII brown, segment III shaded brown in basal third with pedicel and apex yellow, segments IV–VI brown with basal 1/4 yellow; all femora brown, all tibiae and tarsi yellow; fore wing pale; major body setae brown.

Head 1.2 times as long as wide, dorsal surface reticulate between eyes and posteromarginally ( Fig. 24 ); eyes a little shorter than half the length of head; postocular setae capitate, about as long as half the length of eye; antennal segment III with 3 sensoria, IV with 4. Pronotum with many irregular sculpture; major setae capitate; notopleural sutures nearly complete ( Fig. 24 ). Prosternal ferna triangular, pointed medially; mesopraesternum boat-shaped. Metanotum reticulate on anterior ( Fig. 31 ), but with linear sculpture on posterior half, median setae blunt. Fore wing with 5 duplicated cilia; sub-basal setae capitate, S3 sometimes blunt. Pelta typical of genus, with pair of campaniform sensilla; tergite IX setae S1 and S2 pointed to blunt at apex; tube about half as long as head, anal setae a little shorter than tube.

Measurements (holotype female in microns). Total body length 1550. Head length 190, width across cheeks 165; postocular setae length 35. Pronotum, length 100; width 190; setae: am 35, aa 30, ml 30, epim 50, pa 45. Metanotal median setae 20. Fore wing, length 680; sub-basal setae S1 30, S2 35, S3 70. Pelta length 55. Tergite IX posteromarginal setae S1 65, S2 50, S3 70. Tube length 100; anal setae 80. Antennal segments I–VIII length (width): 30 (30), 40 (25), 55 (25), 60 (25), 50 (22), 45 (20), 45 (20), 25 (10).

Male macroptera. Similar in structure to female, but smaller; abdominal segments I-VII more or less paler; pronotal notopleural sutures incomplete; abdominal sternite VIII with pair of pore plates laterally; tergite IX posteromarginal setae S2 much shorter.

Specimens examined. Holotype female. PAPUA NEW GUINEA, Bulolo, on branchlet of Araucaria cunninghamii with Hylurdrectonus araucariae ( Coleoptera , Scolytidae ), 2.ii.1968, B. Gray (BMNH). Paratypes (in BMNH and ANIC): 2 females, 1 male, with same data as holotype; 4 females at same locality, on frass left by H. araucariae in Araucaria branchlet, 1.ii.1968, B. Gray, 1 male on branchlet of A. cunninghamii infested by H. araucariae , 29.ix.1967, B. Gray.

Remarks. This new species is similar to braccatus in body color and structure, but differs in having the pronotum with many irregular sculpture lines ( Fig. 24 ), the notopleural sutures clearly incomplete, the pelta slender, antennal segment III shaded in basal third with pedicel and apex yellow, and sternite VIII with a pair of pore plates. In contrast, braccatus has the pronotum smooth with sculpture lines only near the posterior margin, the notopleural sutures complete, pelta broad, antennal segment III uniformly yellow, and sternite VIII without pore plates. It is also similar to infirmus and chinensis , but differs from them as indicated in the key. It differs from darwini sp. n. in having several duplicated cilia on the fore wings, three sensoria on antennal segment III, and all femora brown.

Adraneothrips yunnanensis sp. n. ( Figs 15 , 25 , 32 , 66–73 )

Female macroptera. Body bicoloured yellow and brown ( Fig. 15 ); antennal segments I–II, VII–VIII brown, segment III uniform yellow, segments IV–V brown with basal 1/3 yellow, VI brown with basal half yellow; head brown; prothorax mainly yellow, pterothorax uniformly brown with lateral margins darker; legs largely yellow, but mid and hind coxae brown, basal half of mid femora shaded with brown; fore wing shaded; pelta brown with lateral lobes yellow, abdominal segments II and IV uniformly yellow, V yellow but brown anterolaterally, remaining segments brown; major body setae brown.

Head 1.1 times as long as wide, dorsal surface reticulate medially ( Figs 25 , 66 ); eyes a little shorter than half the length of head; postocular setae capitate, a little longer than half the length of eye ( Fig. 66 ); antennal segment III with 2 sensoria, IV with 3. Pronotum without sculpture except near posterior margin ( Fig. 66 ); major setae capitate; notopleural sutures nearly complete. Prosternal ferna triangular, pointed medially; mesopraesternum boatshaped ( Fig. 70 ). Metanotum reticulate on anterior half, median setae pointed. Fore wing without duplicated cilia; sub-basal setae capitate ( Fig. 73 ). Pelta typical of genus, with pair of campaniform sensilla ( Fig. 72 ); tergite IX setae S1 and S2 blunt at apex ( Fig. 71 ); tube about half as long as head, anal setae a little shorter than tube.

Measurements (holotype female in microns). Total body length 1725. Head length 210, width across cheeks 165; postocular setae length 50. Pronotum, length 105; width 220; setae: am 40, aa 42, ml 50, epim 55, pa 50. Metanotal median setae 35. Fore wing, length 650; sub-basal setae S1 45, S2 50, S3 65. Pelta length 56. Tergite IX posteromarginal setae S1 75, S2 80, S3 100. Tube length 110; anal setae 100. Antennal segments I–VIII length (width): 30 (32), 45 (25), 65 (25), 70 (20), 70 (22), 55 (20), 50 (20), 30 (10).

Male. Unknown.

Specimens examined. Holotype female. CHINA, Yunnan Prov., Jinghong County, on dead branches and leaves, 12.iv.1997, Y.F. Han (NZMC). Paratypes: 1 female, with same data as holotype (NZMC). INDONESIA, Java, Bogor Botanic Gardens, 2 females in leaf litter, 26.x.1975 (BMNH; ANIC).

Remarks. This new species is similar to russatus , but differs in having only abdominal segments II and VI yellow, with V yellow with brown anterior and the other segments brown. In contrast, russatus has abdominal segments I–II, VI, and VIII yellow, and V yellow with brown anterior, IX brown with yellow anterior. This new species is also similar to hani but differs in lacking fore wing duplicated cilia, and antennal segment IV with three sensoria, whereas hani has duplicated cilia present, and antennal segment IV with four sensoria.

Figures

FIGURES 10 – 15. Adraneothrips adult colour patterns. (10) pteris; (11) russatus (Australia); (12) russatus (China); (13) stannardi; (14) waui; (15) yunnanensis.

FIGURES 22 – 25. Adraneothrips heads. (22) nilgiriensis; (23) russatus; (24) waui; (25) yunnanensis.

FIGURES 26 – 32. Adraneothrips metanota and tergites. (26) braccatus; (27) coloratus; (28) darwini; (29) russatus; (30) hani; (31) waui; (32) yunnanensis.

FIGURES 33 – 39. Adraneothrips species. Male sternite VIII 33 – 36: (33) braccatus; (34) chinensis; (35) makilingensis; (36) russatus. (37) limpidus pronotum. Chaetotaxy of tergite IX 38 – 39: (38) hani male; (39) limpidus female.

FIGURES 66 – 73. Adraneothrips yunnanensis sp. n. Female: (66) dorsal view of head and pronotum; (67) antenna; (68) dorsal view of abdominal tergites IV – V; (69) dorsal view of mesonotum & metanotum; (70) mesopraesternum; (71) abdominal tergites IX – X; (72) pelta; (73) base of forewing.