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

scientific name

Armitarsus watanabei Shinohara, 2002
status

 

Armitarsus watanabei Shinohara, 2002

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) .

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