Acrolyta 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 : 56-58

publication ID	https://doi.org/ 10.32225/bkpmnh.2021.50_55
publication LSID	lsid:zoobank.org:pub:DD695C62-DC2F-4D32-8D33-52648E28661D
DOI	https://doi.org/10.5281/zenodo.12773681
persistent identifier	https://treatment.plazi.org/id/03F98793-1B44-A717-FC67-6147FD3675DA
treatment provided by	Felipe
scientific name	Acrolyta Förster, 1869
status

Treatment

Genus Acrolyta Förster, 1869 View in CoL View at ENA

Acrolyta Förster, 1869: 174 View in CoL . Type: Acrolyta empretiae Ashmead, 1896 View in CoL (= Ischnoceros nigricapitatus Cook & Davis, 1891 ). Designated by Viereck (1914).

Rhadinocera Förster, 1869: 177. Type: Hemiteles (Rhadinocera) algonquinus Viereck, 1917 (= Ischnoceros nigricapitatus Cook & Davis, 1891 ). Included by Viereck (1922).

Mosia Seyrig, 1952: 69 View in CoL . Type: Mosia crassicornis Seyrig, 1952 . Original designation.

Parhemiteles Seyrig, 1952: 82 . Type: Parhemiteles flaviger Seyrig, 1952 . Original designation.

Five species, Acr. albiscapus (Ashmead, 1906) , Acr. aporiae ( Okamoto, 1923) , Acr. discrepa Momoi, 1970 , Acr. excisa Momoi, 1970 , and Acr. spola Momoi, 1970 , have been recorded from Japan. Among them, Acr. albiscapus is treated as status ( Yu et al., 2016). I found at least 13 species of this genus from Japan. Two of them, Acr. flavicoxis Sheng & Sun, 2014 and Acr. rufocincta ( Gravenhorst, 1829) , are newly recorded from Japan here. In addition, one new species and at least five unidentified species are also recognized. In this study, I record five described species including the newly recorded species with some distributional data and describe a new species, Acr. japonica sp. nov. below.

Schwarz & Shaw (2000) revised the generic concepts of this genus and of Eudelus Förster, 1869 . I re-examined the generic position of all Japanese species based on it and concluded their character statuses are accorded with the Acrolyta . No identification key to Japanese species has been provided except for the key to the Ryukyu species according to Momoi (1970), thus I provide a preliminary key to the Japanese species below.

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

(female of Acr. albiscapus is unknown)

1. Metasomal tergites at least partly (usually T II and T III entirely) reddish brown to reddish yellow ( Figs 5A, C View Fig ). Clypeus with ( Fig. 62G View Fig ) or without a pair of distinct teeth anteromedially. .............................................................................. 2

-. Metasomal tergites black except that the posterior margins usually tinged with reddish brown to reddish yellow (e.g., Figs 2C View Fig , 3C View Fig , 6C View Fig ). Clypeus without a pair of distinct teeth anteromedially ( Fig. 62F View Fig ). .............................................................................. 3

2. Clypeus with a pair of distinct teeth anteromedially ( Fig. 62G View Fig ). T II striated and the interspace of striae smooth. .................................. Acr. rufocincta ( Gravenhorst, 1829)

-. Clypeus without a pair of distinct teeth anteromedially. T II reticulate rugose except for smooth posterior margin. .............................................................................. Acr. sp. A

3. Anterior margin of clypeus distinctly entirely rounded. .............................................................................. 4

-. Median part of anterior margin of clypeus truncate, subtruncate ( Fig. 62F View Fig ) or slightly concave. .............................................................................. 5

4. Posterior half of T II and T III largely smooth, without striae ( Fig. 1C View Fig ). Face matt. Hind coxa blackish brown ( Fig. 1A View Fig ). ........................................... Acr. aporiae ( Okamoto, 1923)

-. Above combination of character states lacking. ....................... Acr. spp. (including at least 2 spp.)

5. Hind coxa black. Hind femur usually darkened basally. ....................... Acr. spp. (including at least 2 spp.)

-. Hind coxa yellowish brown or reddish brown (e.g., Figs 2A View Fig , 4A View Fig ), or if largely tinged with blackish brown, clypeus with dense setae and hind femur nearly entirely yellow. .............................................................................. 6

6. T II without striae. T III covered with sparse and fine punctures, without dense punctures and striae. Mesoscutum largely polished. Median part of flagellum slightly wider than other parts, its maximum width less than 2.0 times as long as maximum depth of FL I in lateral view. Ovipositor sheath 0.9 times as long as hind tibia. ................................................ Acr. discrepa Momoi, 1970

-. T II covered with dense punctures and/or striae (e.g., Figs 2C View Fig , 3E View Fig , 4C View Fig , 6C View Fig ). T III sometimes covered with dense punctures and/or striae. Mesoscutum largely matt (e.g., Figs 2C View Fig , 4C View Fig , 6C View Fig ). Other character states various. .............................................................................. 7

7. T II and T III covered with longitudinal striae except for smooth areas ( Fig. 4C View Fig ). .......................................................... Acr. japonica sp. nov.

-. At least T III without longitudinal striae. .............................................................................. 8

8. T II and T III polished and punctate, with some longitudinal striae on basal part of T II ( Fig. 3E View Fig ). Antenna robust and strongly widened except for basal part ( Figs 3A, C View Fig ). FL III 2.0 times as long as maximum depth in lateral view ( Fig. 62O View Fig ). .................................. Acr. flavicoxis Sheng & Sun, 2014

-. T II and T III covered with dense punctures or minute irregular rugae except for smooth areas, without longitudinal striae ( Figs 2C View Fig , 6C View Fig ). Antenna slender. FL III longer than 4.0 times as long as maximum depth in lateral view. ........................................................................ 9

9. Propodeum moderately long, evenly convexly descending, its dorsal face much longer than the hind face ( Fig. 2A View Fig ). Pterostigma light brown ( Fig. 2A View Fig ). ............................................... Acr. excisa Momoi, 1970

-. Propodeum short, abruptly, strongly declivous behind, its dorsal face much shorter than the hind face ( Fig. 6A View Fig ). Pterostigma dark brown ( Figs 6A, D View Fig ). ................................................. Acr. spola Momoi, 1970