The genus Hoplandrothrips and its relatives (Thysanoptera: Phlaeothripidae) from Southeast Asia and Taiwan Author Okajima, Shûji 0000-0001-7249-671X Laboratory of Entomology, Tokyo University of Agriculture, 1737 Funako, Atsugi, Kanagawa, 243 - 0034 Japan. 7okajimas2@gmail.com Author Masumoto, Masami 0000-0001-9049-2448 Laboratory of Entomology, Tokyo University of Agriculture, 1737 Funako, Atsugi, Kanagawa, 243 - 0034 Japan. masumotoms@gmail.com text Zootaxa 2024 2024-07-31 5489 1 22 91 http://dx.doi.org/10.11646/zootaxa.5489.1.4 journal article 10.11646/zootaxa.5489.1.4 1175-5326 13211341 373DBA20-A1A7-4A2D-856C-67BF13D83C41 Ecacanthothrips tenuicornis Okajima ( Figs 15–16 , 120–126 ) Ecacanthothrips tenuicornis Okajima, 1983: 63–65 . E. tenuicornis was originally described from Luzon Is., the Philippines based on eight females and five males together with non-paratypic three females taken from Mindanao Is. This species could well be included in the inarmatus -group and is somewhat similar to leai , although it has smaller body, 1.8–2.6mm in the female, 1.8–2.2mm in the male. Moreover, the head of tenuicornis ( Figs 120 & 121 ) is shorter, about 1.1 times as long as wide or shorter, although the head of leai ( Figs 93 & 94 ) is longer, usually 1.2–1.4 times as long as wide even in small female. In contrast to inarmatus and moundi , the pronotal anteromarginal setae in this species are not elongate even in large males. Furthermore, tenuicornis is apparently most similar to brevicornis described above, but can be discriminated by the antennal structure mentioned in the key above. However, its intraspecific variation derived from allometric growth is not understood in detail. Females and males listed in the doubtful specimens collected from Peninsular Malaysia and Thailand are very similar to this species, but have somewhat larger bodies, 2.5–2.9mm in female and 2.0– 2.6mm in male. Specimens examined. The Philippines , holotype female and paratype females and males from Luzon Is.; non-paratypic 3 females from Mindanao Is. (data described in Okajima, 1983 ). Doubtful specimens. Peninsular Malaysia , about 20km N from Kuala Lumpur , Templer Park , 2 males , on dead leaves, 15.viii.1990 , TN & SO . Thailand , Phuket Is. , nr. Tone Sai water fall, 2 females and 5 males , on dead leaves and branches, 11–14, ix.1992 , TN & SO ; Phuket Is. , Rang Hill , 3 females and 2 males , on dead leaves and branches, 14.ix.1992 , TN & SO; nr , Chiang Mai , foot of Doi Pui , on dead leaves and branches, 3 males , 1.ix.1991 , 1 male , 24.viii.1992 , TN & SO ; Chiang Mai , farm of Chiang Mai University , 1 female and 3 males , on dead leaves and branches, 26.viii.1992 , TN & SO .