Armitarsus watanabei Shinohara, 2002

Bourke, Joanna, 2024, Taxonomic Notes and New Distribution and Host Plant Records for Sawflies and Woodwasps (Hymenoptera, Symphyta) of Japan IX, Bulletin of the National Museum of Nature and Science. Series A, Zoology 50 (1), pp. 19-32 : 25-26

publication ID	https://doi.org/10.50826/bnmnszool.50.1_19
DOI	https://doi.org/10.5281/zenodo.12572136
persistent identifier	https://treatment.plazi.org/id/AA0487B0-0E6B-3E76-09F7-FA2F5E1DFD94
treatment provided by	Felipe (2024-06-17 17:33:07, last updated 2024-11-24 20:23:21)
scientific name	Armitarsus watanabei Shinohara, 2002
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Japanese name: O-koshijiro-togeashi-habachi

( Fig. 4 View Fig )

Material examined. HOKKAIDO: 1♀, Chitose, Horoka , 42°54'N 141°47'E, coll. larva on Cerasus sargentii var. sargentii 24. VIII. 2022, mat. 25. VIII., em. 23. IV. 2023, H. Hara GoogleMaps .

Larva. Late instar ( Fig. 4A, B View Fig ): Head black, laterally dark brown; trunk opaque, blackish, broad lateral margins and apical segment pale brown; paired transverse lines of four or six small tubercles on each segment and numerous small subtriangular projections along lateral margin white; prothoracic segment dorsally with paired white projections along anterior margin; four long subtriangular projections along apical margin of last abdominal segment. Mature larva ( Fig. 4C View Fig ): Pale reddish brown, surface smooth, without small tubercles or projections.

Distribution. Japan (Hokkaido, Honshu). New record from Hokkaido.

Host plant. Rosaceae : Cerasus sargentii (Rehder) H.Ohba var. sargentii (new record).

Remarks. This species was described from Tokyo, central Honshu ( Shinohara, 2002b) and later recorded from Hyogo Prefecture, western Honshu ( Okutani, 1954, as A. albicinctus ; Naito et al., 2004, as A. albicinctus ; Yoshida, 2014b) and Tochigi Prefecture, central Honshu (Katayama, 2011). This is the first distribution record from Hokkaido. The type series of this species was collected on cherry trees ( Shinohara, 2002b) but the immature stages and host plant were unknown. The larva ( Fig. 4 View Fig ) has not been clearly differentiated from the larva of A. albicinctus ( Anonymous, 2014) .

References

Anonymous 2014. Armitarsus albicinctus. In: Insects that feed on trees in Hokkaido. Hokkaido Research Organi- zation, Forestry Research Institute, Bibai. https: // www. hro. or. jp / list / forest / research / fri / zukan / konchu / 00 data / hati / habati / kosijiro / note. html (accessed 24 November 2023) (in Japanese).

Naito, T., H. Yoshida, H. Nakamine, T. Morita, T. Ikeda, H. Suzuki and A. Nakanishi 2004. Species diversity of sawflies in Hyogo Prefecture, central Japan. Museum of Nature and Human Activities, Hyogo, Monograph of Natural History and Environmental Science (1): 1 - 2 + pls. 1 - 10 + 1 - 85 (in Japanese).

Okutani, T. 1954. Studies on Symphyta (I). Symphyta of Sasayama with description of a new species. The Sci- ence Reports of the Hyogo University of Agriculture, Agricultural Biology, Sasayama 1 (2): 75 - 80.

Shinohara, A. 2002 b. Armitarsus watanabei, a new sawfly (Hymenoptera, Tenthredinidae) from central Honshu, Japan. Special Bulletin of the Japanese Society of Coleopterology, Tokyo 5: 473 - 479.

Yoshida, H. 2014 b. [Additional records of sawflies and woodwasps from Hyogo Prefecture.] Kiberihamushi 36: 15 - 25 (in Japanese).