Homotropus signatus ( Gravenhorst, 1829 )

Morishita, Shunsuke & Watanabe, Kyohei, 2025, Review of the genera Homotropus Förster and Syrphoctonus Förster (Hymenoptera, Ichneumonidae, Diplazontinae) from Japan, Zootaxa 5588 (1), pp. 49-76 : 67-70

publication ID	https://doi.org/10.11646/zootaxa.5588.1.2
publication LSID	lsid:zoobank.org:pub:D6A24D15-616C-4BEB-B7F9-132180AE0C12
DOI	https://doi.org/10.5281/zenodo.14926658
persistent identifier	https://treatment.plazi.org/id/03D487FD-FF8A-8B78-1BBA-26851DDAFD5D
treatment provided by	Plazi (2025-02-19 22:05:08, last updated 2025-02-25 20:01:17)
scientific name	Homotropus signatus ( Gravenhorst, 1829 )
status

Treatment

Homotropus signatus ( Gravenhorst, 1829)

( Figs 12 A–F View FIGURE 12 )

Bassus signatus Gravenhorst, 1829: 325 .

Tryphon compressiventris Cresson, 1868: 105 .

Homotropus hygrobius Thomson, 1890: 1524 .

Homotropus bifoveolatus Kriechbaumer, 1894: 246 .

Zootrephes montanus Davis, 1895: 24 .

Homotropus signatus : Dasch, 1964: 164.

Homotropus signatus : Townes et al., 1965: 404.

Homotropus signatus : Klopfstein, 2014b: 72 View Cited Treatment .

Specimens examined. JAPAN: [Hokkaido] 7F10M, Akkeshi Town, Bekanbeushi marsh, 14. VII. 2003, R. Matsumoto leg. ( OMNH); 5F, ditto, 12–31 VII 2003, R. Matsumoto leg. (MsT) ( OMNH); 1M, ditto, 1. VIII. 2003, R. Matsumoto leg. ( OMNH); 5F, ditto, 1–30 VIII 2003, R. Matsumoto leg. (MsT) ( OMNH); 11F, ditto, 1–31 VIII 2003, R. Matsumoto leg. (MsT) ( OMNH); 2F10M, ditto, 30. VIII. 2003, R. Matsumoto leg. ( OMNH); 1F, Nukabira , 1. VII. 1980, K. Maeto leg. ( NARO); 1M, Toyokoro Town, Horooka , 17. VI. 2006, K. Watanabe leg. (KPNMH) ; 1F, Nissho-toge, Sarugawa-river , 31 VII–14 VIII 2010 , N. Kuhara leg. (MsT) (EUM); [Honshu] 1M, Nagano Pref., Otaki Vil., Mt. Ontakesan , 13–25 VI 2015, S. Shimizu leg. (KPNMH). GERMANY: 1F (det. E. Diller), Northeim , 8. VIII . 1945 , (ZSM); 1M (det. E. Diller), Stolzenau , 8. VIII. 1945, (ZSM). NETHERLANDS: 1F (det. C. J. Zwakhals), St. Pietersberg , 15. VIII . 1986 , C. J. Zwakhals leg. (KPNMH); 1F (det. C. J. Zwakhals), Asperen , 12. VIII. 1973, C. J. Zwakhals leg. (KPNMH).

Diagnosis. See Klopfstein (2014b).

Distribution. Japan (Etorofu Is., Kunashiri Is., Hokkaido, and Honshu). Outside Japan, this species is widely distributed in Holarctic region ( Yu et al. 2016).

Bionomics. In Japan, Syrphus vitripennis Meigen, 1822 ( Diptera , Syrphidae ) have been recorded as host (Uchida 1930, 1957). Outside Japan, nine hoverfly species, Epistrophe eligans (Harris, 1780) , Neocnemodon vitripennis (Meigen, 1822) , Platycheirus fulviventris (Macquart, 1829) , Scaeva pyrastri (Linnaeus, 1758) , Sphaerophoria cylindrica Say, 1824 , Sphaerophoria rueppellii (Wiedemann, 1820) , Sphaerophoria scripta (Linnaeus, 1758) , Syrphus ornatus Meigen, 1822 , Syrphus torvus Osten Sacken, 1875 have been recorded as hosts ( Rudow 1908; Rudow 1919; Scott 1939; Dasch 1964; Thirion 1994; Vidal 1997). Adoxophyes orana (Fischer von Röslerstamm, 1834) ( Lepidoptera , Tortricidae ) and Delia radicum (Linnaeus, 1758) ( Diptera , Anthomyiidae ) have also been recorded as hosts ( Janssen 1958; Constantineanu & Mustata 1973; Mustata 1978; Pisica 1983), but are considered doubtful records.

Remarks. This is the first record of this species from Honshu.

References

Constantineanu, M. I. & Mustata, G. (1973) Ichneumonidae (Hym. Ichneum.) obtinute prin culturi din insecte daunatoare legumelor din Moldova. Studii si Comunicari Stiintele Naturii. Muzeul Judetean Suceava, 3, 325-352.

Cresson, E. T. (1868) A list of the Ichneumonidae of North America, with descriptions of new species. Transactions of the American Entomological Society, 2, 89-114. https://doi.org/10.2307/25076198

Dasch, C. E. (1964) Ichneumon-flies of America north of Mexico: 5. Subfamily Diplazontinae. Memoirs of the American Entomological Institute, No. 3, 1-304.

Davis, G. C. (1895) A monograph of the tribe Bassini. Transactions of the American Entomological Society, 22, 17-30.

Gravenhorst, J. L. C. (1829) Ichneumonologia Europaea. Pars III. Sumtibus auctoris, Vratislaviae, 1097 pp. https://doi.org/10.5962/bhl.title.65750

Janssen, M. (1958) Uber Biologie, Massenwechsel und Bekampfung von Adoxophyes orana Fischer von Roeslerstamm (Lepidoptera: Tortricidae). Beitrage zur Entomologie, 8, 291-324.

Klopfstein, S. (2014 b) Revision of the Western Palaearctic Diplazontinae (Hymenoptera, Ichneumonidae). Zootaxa, 3801 (1), 5-125. https://doi.org/10.11646/zootaxa.3801.1.1

Kriechbaumer, J. (1894) Himenopteros nuevos de Mallorca recogidos por Dr. Fernando Moragues. Anales de Historia Natural Sociedad Espanola, 23, 239-253.

Mustata, G. (1978) Facteurs biotiques limitatifs dans certaines populations de Chortophila brassicae Bouche, (Diptera, Muscidae). Travaux du Museum d'Histoire Naturelle ' Grigore Antipa', 19, 289-291.

Pisica, C. (1983) Ichneumonidae (Hym.) parasitizing Diptera in Romania. Analele Stiintifice ale Universitatii Al. I. Cuza din Iasi, Sect. II a, 29, 9-12.

Rudow, F. (1908) Schmarotzer verschiedener Insekten. Entomologisches Jahrbuch, 17, 101-106.

Rudow, F. (1919) Ichneumon. Entomologische Zeitschrift, 32, 79-80 + 84 + 88.

Scott, E. I. (1939) An account of the developmental stages of some aphidophagous Syrphidae (Dipt.) and their parasites (Hymenopt.). Annals of Applied Biology., 26, 509-532. https://doi.org/10.1111/j.1744-7348.1939.tb06987.x

Thirion, C. (1994) Les Diplazontinae (Hymenoptera Ichneumonidae) en Belgique et dans les regions limitrophes. Deuxieme contribution. Notes Fauniques de Gembloux, 29, 3-100.

Thomson, C. G. (1890) XLIII. Ofversigt af arterna inom slagtet Bassus (Fab.). Opuscula Entomologica, Lund, XIV, 1459-1525.

Townes, H., Momoi, S. & Townes, M. (1965) A catalogue and reclassification of the eastern Palearctic Ichneumonidae. Memoirs of the American Entomological Institute, 5, 1-661.

Vidal, S. (1997) Determination list of entomophagous insects. Nr. 13. IOBC-WPRS Bulletin, 20 (2), 1-8.

Yu, D. S., van Achterberg, C. & Horstmann, K. (2016) Taxapad 2016. Ichneumonoidea 2015. Database on flash-drive. Available from: http://www.taxapad.com (accessed 26 August 2024)

Figures

FIGURE 12. Homotropus signatus (Gravenhorst, 1829), female (A–D) and male (E, F)―A, E: lateral habitus; B, F: head, frontal view; C: scutellum, dorsal view; D: T II to apex of metasoma, dorsal view.