Liothrips threobrevis, Wang & Lin, 2020

Wang, Chin-Ling & Lin, Feng-Chyi, 2020, Genera and species of the Liothrips lineage (Thysanoptera, Phlaeothripinae) from Taiwan, Zootaxa 4861 (3), pp. 349-375 : 367

Liothrips threobrevis nom. nov

( Figs 78–83 )

Gynaikothrips citricornis Moulton, 1928a: 300 ; homonym of Phyllothrips citricornis Hood, 1908: 305 .

This species was described from Taiwan by Moulton as citricornis in the genus Gynaikothrips but was subsequently transferred to the genus Liothrips . However, it thus became a homonym of citricornis Hood from North America that had previously been described in Phlyllothrips, a genus now recognized as a synonym of Liothrips . As a result, a new name is proposed here for the species described by Moulton from Taiwan.

Female macroptera. Body length 3.1 mm. Brown; antennal segment I and most of II brown, same colour as head, III–VI and basal half of VII yellow, distal half of VII and all of VIII greyish brown; all three pairs of legs brown with yellow tarsi; fore wings hyaline; major body setae hyaline.

Head about twice as long as wide ( Fig. 78 ), po setae on middle of dorsum, about 0.8 times length of eyes; maxillary stylets present only in posterior fourth of head, about 1/3 of head apart; antennal segment III 2.2 times, IV 1.8 times as long as II ( Fig. 83 ). Pronotal am setae (1 or 2 pairs) much shorter than aa setae ( Fig. 79 ); mesopresternum boat-shaped ( Fig. 80 ), connected in middle; metanotum covered with dense longitudinal striae. Pelta triangular with sharp lateral angles ( Fig. 81 ); tergite II laterally with 4 accessary setae ( Fig. 82 ); tube shorter than head.

Specimens examined. Taiwan, Taihoku (Taipei), female paratype from Liquidambar yormosana , 20.vi.1926 (Moulton No. 2211); Taihoku, 1 female from Liquidambar formosana , 20.vi.1921 (Takahashi).

Etymology. This species differs from L. citricornis (Hood) mainly by having shorter maxillary stylets and shorter pronotal aa and am setae. The name threobrevis indicates these characteristics.

Figures

FIGURES 78–83. Liothrips threobrevis nom.nov.: (78) head; (79) pronotum; (80) mesopresternum; (81) pelta; (82) tergite II; (83) shape of antenna.