Aclastus Förster, 1869

Watanabe, Kyohei, 2021, Taxonomic and Zoogeographic Study of the Japanese Phygadeuontinae (Hymenoptera, Ichneumonidae), with Descriptions of 17 New Species, Bulletin of the Kanagawa Prefectural Museum (Natural Science) 50, pp. 55-136 : 97-98

Genus Aclastus Förster, 1869

Aclastus Förster, 1869: 175 . Type: Aclastus rufipes Ashmead, 1902 . Included by Ashmead (1902).

Microplex Förster, 1869: 175 . Type: Aclastus rufipes Ashmead, 1902 . Included by Roman (1909).

Daetora Förster, 1869: 175 . Type: Hemiteles solutus Thomson, 1884 . Designated by Perkins (1962).

Opisthostenus Förster, 1869: 175. Type: Hemiteles (Opisthostenus) etorofuensis Uchida, 1936 . Included by Uchida (1936b).

Fetialis Rossem, 1990: 315 . Type: Fetialis alacris Rossem, 1990 . Original designation.

A single species, Acl. etorofuensis (Uchida, 1936) , has been recorded from Japan. In addition, I found at least two undetermined species from Japan. In this study, I re-describe Acl. etorofuensis with some distributional data.

Preliminary key to Japanese species of the genus Aclastus (♀)

1. T III almost entirely smooth ( Fig. 38D ). Antenna with 18–20 flagellomeres. ........................................ Acl. etorofuensis (Uchida, 1936)

-. T III largely punctate. Antenna with various number of flagellomeres. ............................................................................................ 2

2. Antenna with 19–20 flagellomeres. Ovipositor straight, distinctly shorter than hind tibia. ............................................................................... Acl. sp. A

-. Antenna with 23–24 flagellomeres. Ovipositor entirely upcurved, almost as long as hind tibia. ............................................................................... Acl. sp. B

Figures

Fig. 38. Aclastus etorofuensis (Uchida, 1936), KPM-NK 81976, female from Japan ― A, lateral habitus; B, head, frontal view; C, propodeum, dorso-lateral view; D, T I and T II, dorso-lateral view.