Acalypta sauteri Drake, 1942

Acalypta sauteri Drake, 1942 View in CoL

Figs 2 E View Figure 2 , 4 E View Figure 4 , 6 C View Figure 6 , 8 E View Figure 8 , 10 C View Figure 10 , 12 C View Figure 12 , 16 C, D Japanese name: Maru-gunbai View Figure 16

Acalypta sauteri Drake, 1942: 14. Holotype: brachypterous ♂; type locality: Japan • Oayama [= Honshu, Kanagawa-ken, Mt. Oyama] (cf. Takeya 1951; Miyatake 1958; Hiura 1960; Drake and Lattin 1963; Tomokuni 1983); depository: United States National Museum of Natural History, Washington, D. C., USA. View in CoL

References.

Takeya (1951: 6) (checklist: eastern Asia); Miyatake (1958: 15) (distribution); Hiura (1960: 70) (distribution); Takeya (1962: 68) (distribution); Drake and Lattin (1963: 336) (distribution); Drake and Ruhoff (1965: 54) (catalogue); Miyamoto (1965: 90) (monograph); Tomokuni (1972: 88) (distribution); Baba (1982: 8) (distribution); Tomokuni (1983: 146) (biology); Tomokuni (1985: 156) (distribution); Miyamoto and Yasunaga (1989: 166) (checklist: Japan); Takahashi (1990: 3) (distribution); Péricart and Golub (1996: 10) (checklist: Palaearctic); Miyamoto (2008: 157) (monograph); Yamada and Tomokuni (2012: 187) (monograph); Yano et al. (2013: 24) (distribution); Maehara (2014: 57) (distribution); Nozaki et al. (2016: 75) (distribution); Yamada and Ishikawa (2016: 429) (checklist: Japan); Hayashi and Kadowaki (2018: 309) (checklist: Oki Islands); Ito and Sasaki (2018: 17) (distribution); Obae (2019: 18) (distribution); Okochi (2019: 1) (distribution); Yamaguchi and Nakamura (2019: 61) (distribution); Yoshitomi and Hayashi (2019: 84) (distribution); Kawase (2020: 6) (distribution); Konno (2020: 18) (distribution); Yamamoto (2021 a: 4) (distribution); Takai (2022: 61) (distribution); Konno (2023: 18) (distribution); Okochi (2023: 5) (distribution); Yamamoto (2022 a: 2) (distribution); Yamamoto (2022 b: 10) (distribution); Ban et al. (2024: 115) (distribution); Yamamoto (2024 a: 4) (distribution); Yamamoto (2024 b: 9) (distribution).

Material examined.

Non-types, Japan • 1 brachypterous ♂; Hokkaido, Yakumo-cho, Namarikawa ; 29 Jun. 2024; R. Sato leg.; SIHU • 2 brachypterous ♀♀; same collection data as for preceding; 6 Oct. 2024; SIHU • 1 brachypterous ♂ 1 brachypterous ♀; Awa Island, Uramura ; 20 Sep. 2015; G. Mashima leg.; TUA .

Remarks.

Although Acalypta sauteri exhibits geographic variations ( Tomokuni 1972), the morphological characteristics of the above five specimens were consistent with photographs of the holotype ( United States National Museum of Natural History 2024) and the original description ( Drake 1942) of the species. Therefore, we identified the studied specimens from Hokkaido and Awa Island as A. sauteri . Morphological differences between A. sauteri and nine other Japanese species are provided in the identification key below.

Distribution.

Japan (Hokkaido, Honshu, Awa Island, Sado Island, Awaji Island, Oki Islands (Dogo Island), Ikuchi Island, Shikoku, Shodo Island, Omi Island, Kyushu, Amakusa Islands (Shimoshima Island )) (Fig. 17 View Figure 17 ) ( Tomokuni 1983, 1985; Nozaki et al. 2016; Yamada and Tomokuni 2012; Yamada and Ishikawa 2016; Aukema 2025). Acalypta sauteri is newly recorded from Hokkaido and Awa Island. The discovery of A. sauteri from Hokkaido also represents the northernmost record of this species.

Host plant.

Acalypta sauteri were collected from 23 moss species belonging to 14 families: Atrichum rhystophyllum (Müll. Hal.) Paris ( Polytrichaceae ), Brachythecium buchananii (Hook.) A. Jaeger ( Brachytheciaceae ), B. plumosum (Hedw.) Bruch et Schimp , B. populeum (Hedw.) Bruch et Schimp. , B. rivulare Bruch et Schimp. , Brotherella henonii (Duby) M. Fleisch. ( Pylaisiadelphaceae ), Bryhnia trichomitria Dixon et Thér. ( Brachytheciaceae ), Codriophorus anomodontoides (Cardot) Bednarek-Ochyra et Ochyra ( Grimmiaceae ), Cratoneuron filicinum (Hedw.) Spruce ( Amblystegiaceae ), Entodon sullivantii (Müll. Hal.) Lindb. ( Entodontaceae ), Haplocladium microphyllum (Hedw.) Broth. ( Leskeaceae ), Hypnum cupressiforme Hedw. ( Hypnaceae ), H. oldhamii (Mitt.) A. Jaeger et Sauerb. , H. plumaeforme Wilson , H. tristoviride (Broth.) Paris , Kindbergia arbuscula (Broth.) Ochyra ( Brachytheciaceae ), Leptodictyum riparium (Hedw.) Warnst. ( Amblystegiaceae ), Philonotis thwaitesii Mitt. ( Bartramiaceae ), Plagiomnium acutum (Lindb.) T. J. Kop. ( Mniaceae ), Plagiothecium euryphyllum (Cardot et Thér.) Z. Iwats. ( Symphyodontaceae ), Rosulabryum billardieri (Schwägr.) J. R. Spruce ( Bryaceae ), Trachycystis microphylla (Dozy et Molk.) Lindb. ( Mniaceae ), and Thuidium kanedae Sakurai ( Thuidiaceae ) ( Tomokuni 1983, 1985; Yamada and Tomokuni 2012; Yamamoto 2022 a; Ban et al. 2024).

Bionomics.

Adults were observed in almost all seasons, and nymphs were collected in January and May, and from August to October ( Drake 1942; Takeya 1951, 1962; Miyatake 1958; Hiura 1960; Drake and Lattin 1963; Tomokuni 1972, 1983, 1985; Baba 1982; Takahashi 1990; Yamada and Tomokuni 2012; Yano et al. 2013; Maehara 2014; Nozaki et al. 2016; Ito and Sasaki 2018; Yamaguchi and Nakamura 2019; Obae 2019; Okochi 2019, 2023; Yoshitomi and Hayashi 2019; Kawase 2020; Konno 2020, 2023; Yamamoto 2021 a, 2022 a, 2022 b, 2024 a, 2024 b; Takai 2022; Ban et al. 2024), suggesting that the overwintering stage is characterized by adults and nymphs.