Hypseloecus, Reuter, 1891

Yasunaga, Tomohide & Duwal, Ram Keshari, 2025, Three new species of the plant bug tribe Pilophorini from Japan (Hemiptera: Heteroptera: Miridae: Phylinae), Zootaxa 5632 (3), pp. 531-546 : 535-536

Key to Japanese species of Hypseloecus

(Revised from Yasunaga et al. 2021)

1. Dorsum uniformly fuscous or dark brown (Figs. 1G, 2F–G).................................................... 2

- Dorsum reddish brown (Figs. 1A, C, 2C) or paler (Fig. 2A).................................................... 3

2. Base and apical 1/4 of antennomere II darkened ( Fig. 2F–G ); procoxa uniformly creamy white; vesica with a single median process; inhabiting cold temperate zones in mountain areas of Honshu and associated with Viscum album L........................................................................................ H. nakagawai Yasunaga & Duwal

- Antennomere II with pale basal half and darkened apical half ( Fig. 1G ); procoxa dark brown; vesica with two median processes ( Yasunaga 2001a, fig. 9); thermophilic species inhabiting Ishigaki and Iriomote Islands of Ryukyus (host plant unknown).................................................................................... H. takahashii Yasunaga

3. Body oval; dorsum almost uniformly brownish olive ( Fig. 2A ); each tibia with obscure spots that are not forming annulations.......................................................................... H. fukutomii sp. nov.

- Body rounded, tumid; dorsum reddish brown or reddish chestnut brown ( Figs. 1A , 2C ); each tibia with dark or reddish brown annulations.......................................................................... H. tamaderai sp. nov.

Figures

FIGURE 1. Habitus images of living individuals (and habitat: D) of Hypseloecus spp. A−C. H. tamaderai sp. nov., paratype ♀ (from Miyazaki Pref.). D. Host plant of H. tamaderai, Taxillus yadoriki. E. H. castaneus Yasunaga, Yamada & Artchawakom, ♂ (from Nakhon Ratchasima, Thailand). F. Same, ♀. G. H. takahashii Yasunaga, 2000, paratype ♀ (from Ishigaki Island, courtesy of M. Takai).

FIGURE 2. Dorsal (A, C, F, H, J–L) and ventral (others) habitus images of Japanese pilophorine species. A−B. Hypseloecus fukutomii sp. nov. (A, holotype ♂, B−C, paratype ♂, D−E, paratype ♀). C–E. H. tamaderai sp. nov., paratypes (C, E from Yakushima Is., D from Amami-Oshima Is.). F–G. H. nakagawai Yasunaga & Duwal, 2019, paratype ♂ (from Akita Pref., Japan). H–I. Pilophorus reoi sp. nov., holotype ♂. J. Same, paratype ♀. K. P. maeharai Yasunaga & Duwal, 2016 (paratype ♀ from Tochigi Pref., Japan). L. P. hyotan Yasunaga, Duwal & Nakatani, 2021 (paratype ♀ from Nagasaki Pref., Japan).