Review of the flat bug subfamily Calisiinae from Japan, with description of a new genus and four new species (Hemiptera: Heteroptera: Aradidae) Author Heiss, Ernst Entomology Research Associate, Tiroler Landesmuseum, 2 a Josef Schraffl Strasse, A- 6020 Innsbruck, Austria Author Shimamoto, Shusuke Laboratory of Entomology, Faculty of Agriculture, Tokyo University of Agriculture, 1737 Funako, Atsugi-shi, Kanagawa, Japan Author Nagashima, Seidai Itami City Museum of Insects, 3 - 1 Koyaike, Itami-shi, Hyogo, Japan text Zootaxa 2024 2024-03-27 5432 1 54 68 http://dx.doi.org/10.11646/zootaxa.5432.1.4 journal article 10.11646/zootaxa.5432.1.4 1175-5326 10898520 102FEF9D-51B0-49AF-A226-37B2D6E55925 Nipponocalisius dimorphus sp. nov. ( Figs. 6–8 , 13–15 , 21–23 , 28 , 33J–N ) Calisius sp. 2 : Nagashima & Shono (2012: 59 figs. 209a–d, 302); Ishikawa (2016: 454) . Nipponocalisius dimorphus : Heiss (2023: 111) . Unavailable name. Type material. Holotype ( ♂ ) brachypterous: Japan , Ryukyus / Ishigaki Is. / Mt. Yarabu-dake / 8.June.2003 / Seidai Nagashima // ( TUA ); paratypes : 6 ♂♂ 11 ♀♀ brachypterous, 2 ♀♀ macropterous collected with holotype ( CEHI , TUA ); 12 ♂♂ 10 ♀♀ brachypterous: Japan , Ryukyus / Ishigaki Is. / Mt.Yarabu-dake / 1. July. 2004 / Seidai Nagashima // ( TUA ); 1 ♂ 3 ♀♀ brachypterous: Japan , Ryukyus / Ishigaki Is. / Mt. Yarabu-dake / 10. April. 2003 / Tadafumi Nakata leg. // ( TUA ); 2 ♂♂ 1 ♀ brachypterous, 2 ♀♀ macropterous: Japan , Ryukyus / Ishigaki Is. / Mt. Yarabu-dake / 27. January. 2003 / Tadafumi Nakata leg. // ( TUA ); 2 ♂♂ 11 ♀♀ brachypterous: Japan , Ryukyus / Ishigaki Is. / Mt. Yarabu-dake / 31. January. 2003 / Tadafumi Nakata leg. // ( TUA ); 8 ♂♂ 19 ♀♀ brachypterous: Japan , Ryukyus / Ishigaki Is. / Mt. Yarabu-dake / 21. January. 2003 / Tadafumi Nakata leg. // ( TUA ); 5 ♂♂ 2 ♀♀ brachypterous: Japan , Okinawa-pref. , Ishigaki-Is. / Ishigaki-shi , Oohama / 24.425204 , 124.199770 / 11.VI.2019 / Kohei Watanabe leg. // ( TUA ); 1 ♀ macropterous: Japan , Ryukyus / Ishigaki Is. / North of Maezato Dam / 2.January.1998 / Keiichi Takahashi // [same label written in Japanese] // ( TUA ); 1 ♀ macropterous: Japan , Ryukyus / Ishigaki Is. / Mt. Buzama-dake / 5.IX.1998 / Keiichi Takahashi // [same label written in Japanese] // ( TUA ); 1 ♀ macropterous: 24.3897°N , 123.8091°E / Uehara , Iriomote Isl. , Taketomi-cho , Okinawa Pref. / Ryukyu , Japan , 27 June 2019 / Sifting , Yu Hisasue leg. // ( TUA ); 1 ♀ : Japan , the Ryukyus / Yaeyama Isls., Iriomotejima-Is. / Shirahama - Sonai / 8.X.1963 / K. Morimoto // [same label written in Japanese] // Holotypus Calisius tigrinus sp. nov. [unpublished name] // ( KUM ); 2 ♀♀ brachypterous: alt. 60 m / Iriomotejima Is. , Japan / Okinawa-ken, Yaeyama-gun / Taketomi-chō, Ōtomi rindō / 24°17'57"N , 123°51'07"E / 25 XI 2018 , Fumitaka Nakano // ( TUA ). All provided with type labels . FIGURES 26–29. Japanese Nipponocalisius and Aradosyrtis species , left paramere, (a) dorsal view and (b) ventral view. 26, N . ishikawanus sp. nov. ; 27, N . tomokunii sp. nov. , 28, N . dimorphus sp. nov. , 29, A . shonoi sp. nov. Diagnosis. Brachypterous specimens of both sexes (predominant in the populations) are the smallest among Palaearctic congeners and unmistakeable due to their brachyptery and dilated lamellate genae. macropterous females are easily recognized by sharing the same color pattern of the scutellum as seen in the brachypterous morph (macropterous male unknown). Description. Brachypterous male. Coloration stramineous with dark brown pattern on head, pronotum, scutellum and connexivum. Scutellum with light colored transverse band extending anteriorly along median ridge and lateral margins, apex bordered by sickle-shaped pale margin. Head. Short, about as long as wide (18:18.5), clypeus medially elevated with anterolateral dilated lamellate genae, apices with four larger round expansions; antennae 0.97 times as long as width of head, length of antennal segments I:II:III:IV = 3:3:5:7; vertex with a pair of longitudinal and a transverse posterior row of tubercles; postocular lobes dentate; rostrum reaching base of head. Pronotum. Subrectangular, about three times as wide as long (27:9), lateral margins with small tubercles, surface of anterior part with two submedian pairs of larger and few smaller tubercles, posterior part with sublateral transverse sclerites. Scutellum. Abbreviated, reaching mtg VI, surface elevated along median ridge and triangular base, with scattered whitish tubercles, lateral margins carinate and granulate. Hemelytra . Small sclerites of corium exposed laterally of scutellum. Abdomen. Exposed lateral margin of tergal plate beset with rows of three tubercles on each tergite, the posterior ones stramineous, others dark brown; the posterior row is in line with the posterior tubercle of the three tubercles bordering lateral margins of deltg II–VII, with two smaller tubercles in between; deltg I exposed and elevated, densely beset with whitish tubercles; tergite VII elevated medially, tuberculate; exposed sclerite of tergite VIII beset with three large tubercles. Genitalia. Paramere blade as in Fig. 28 . Female. Brachypterous morph as male but of slightly larger size. macropterous female distinctly larger, head as wide as long (20:20), antennae 0.90 times as long as width of head, length of antennal segments I:II:III:IV = 3:3:5:7; pronotum trapezoidal, about twice as wide as long (30:10), posterior lobe with two pairs of distinctly tuberculate carinae, lateral ones joining median ones at posterior margin of anterior lobe, lateral margins of latter with two pairs of large tubercles; scutellum covering tergal plate, surface flat and punctured, without larger tubercles, lateral margins and median carina beset with distinct tubercles, colour and structure as in brachypterous morph. Measurements. Brachypterous ♂♂ (n = 5): body length 1.85–2.00 mm, width of abdomen 0.85–0.90 mm ; brachypterous ♀♀ (n = 5): body length 2.25–2.40 mm , width of abdomen 1.10–1.20 mm ; macropterous ♀♀ (n = 5): body length 2.50–2.65 mm , width of abdomen 1.10–1.20 mm . Etymology. The specific epithet is the Latin adjective dimorphus , - a , - um , meaning “dimorphous”, referring to the dimorphous wings, unusual in Aradidae . Ecology. Specimens were collected under bark of dead fallen trees of Ficus variegata Blume ( Moraceae ) (Nagashima & Shono 2012) ( Fig. 33J–N ). Distribution. Recorded from Ishigaki and Iriomote Islands in the Ryukyu Archipelago, supposed to be endemic ( Fig. 34 ). Remarks. Nipponocalisius dimorphus Heiss, Shimamoto & Nagashima, 2023 sensu Heiss (2023) refers to this new species.