New species of the plant bug genus Neolygus Knight from Japan, Taiwan and Thailand (Hemiptera: Heteroptera: Miridae: Mirini) Author Yasunaga, Tomohide text Zootaxa 2024 2024-05-02 5446 4 451 487 http://dx.doi.org/10.11646/zootaxa.5446.4.1 journal article 10.11646/zootaxa.5446.4.1 1175-5326 11102124 C204C80E-332C-4537-A6BA-1FC372BD6783 Neolygus hasegawai n. sp. Figs. 4I , 8A–F , 16A–L Material examined. Holotype ( ♂ ). JAPAN : Honshu , Fukushima Pref. , Oze National Park , Tashiro , 36.977 , 139.480 , Angelica pubescens , 18 Jul 1950 , H. Hasegawa ( NIAES ) ( AMNH _ PBI 00378768 ) . Paratypes : JAPAN : same data as for holotype, except for date 17–18 Jul 1950 , 2♂ 3♀ ( NIAES ) . Diagnosis. At first sight similar to the uniformly pale green, moderate-sized congeners, this new species is distinct in having the following characters: apex of clypeus darkened; apical protuberances of parameres bulbous; vesica with straight, apically widened spiculum and truncated apex of ventral sclerite; and dorsal sac with unique inner looped strap-like sclerite, strongly protruded and fused with anterior part of posterior wall ( Fig. 8F ). Description. Body elongate oval, moderate in size ( Figs. 4I ); general coloration stramineous brown (most probably greenish when alive, fading in dry-preserved old specimens collected in 1950). Head shining; vertex relatively wide, with distinct basal transverse carina that is slightly narrower than pronotal collar ( Fig. 16B ); apex of clypeus infuscate. Antenna pale brown; segments III and IV darker. Labium pale reddish brown, reaching or slightly exceeding apex of mesocoxa. Pronotum and pleura uniformly pale brown; scent efferent system relatively narrow ( Fig. 16C ). Hemelytra immaculate; membrane pale smoky brown, with pale yellow veins. All coxae and legs pale; tibial spines pale reddish brown; pretarsal structure as in Fig. 16F . Ventral side of abdomen uniformly pale. Male genitalia ( Figs. 8A–D , 16A–L ): Parameres with bulbous apical protuberances on sensory lobes ( Fig. 8A– B ); hypophysis of right paramere sharpened apically; vesica with spiculum widened apically and ventral sclerite truncated at apex ( Figs. 6E , 16H–I ). Female genitalia ( Figs. 8G–I , 16J–L ): Sclerotized rings thick-rimmed, elongate-ovoid ( Fig. 8G , 14J ); posterior wall as in Fig. 14K–L ; dorsal sac with looped strap-like sclerite that is covered with membranous lobe, strongly protruded and fused with dorsoanterior part of posterior wall ( Fig. 8F , 16K ). Measurements : See Table 1 . Etymology. Named in honor of the late Mr. Hitoshi Hasegawa (1918–2006), one of well-known heteropterists in Japan ; he collected all available specimens of this new species and N. yonanus n. sp. as well. Distribution . Japan ( Fukushima Pref. : Oze National Park). Biology. Label data shows the specimens designated as type-series were collected from Angelica pubescens Maxim. (Umbelliferae), but the exact breeding host is yet to be confirmed.