I. 2. Family Perlodidae

Subfamily Perlodinae

Tribe Acryopterygini

 

Genus Megarcys Klapálek, 1912

1. Megarcys ochracea Klapálek, 1912
   • Megarcys ochracea Klapálek, 1912, p. 10, fig. 4 & 5.
   • Matsumuria sapporensis Klapálek, 1912a, p. 16, fig. 1 & 2.
   • Megarcys ochracea: Okamoto, 1912b, p. 107 & 153.
   • Megarcys ochracea: Matsumura, 1931, p. 1421; 1933, p. 18.

   
   Distribution: Sachalin, Hokkaido, Honshu.
   Japanese name: OH-AMIME-KAWAGERA
   Other Japanese name: AMIME-KAWAGERA (Okam. 1912) NAMI-AMI-KAWAGERA (Mats. 1931, 1933)

   Images: [Adults] 1931, text-fig. (habitus); 1933, pl. 5-6 (habitus).

 

Genus Pseudomegarcys Kohno, 1946

1. Pseudomegarcys japonica Kohno, 1946
   • Pseudomegarcys japonica Kohno, 1946

    

   Distribution: Honshu.

   Japanese name: HIROBANE-AMIME-KAWAGERA

   Note: This name was sometimes misspelled as P. japonicus.

 

Genus Skwala Ricker, 1943

1. Skwala pusilla (Klapálek, 1904)
   • Arcynopteryx jezoensis Okamoto, 1912, p. 108.
   • Skwala brevis (Koponen)

    

   Distribution: Russian Far East, Hokkaido, Honshu.

   Japanese name: HIME-AMIME-KAWAGERA

    

2. Skwala natorii Chino, 1999.
   • Skwala natorii Chino, 1999.

    

   Distribution: Honshu.

   Japanese name: MISUJI-AMIME-KAWAGERA

 

 

Genus Sopkalia Ricker, 1952

1. Sopkalia yamadae (Okamoto, 1917)
   • Sopkalia yamadae (Okamoto, 1917)

 

Distribution: Honshu.

Japanese name: NIKKO-AMIME-KAWAGERA

 

 

 

Tribe Perlodini

 

Genus Megaperlodes Yokoyama et al., 1986

1. Megaperlodes nigar Yokoyama et al., 1986  

      

   Pteronarcys reticulata Burn.: Matsumura, 1904, p. 50; 1907, p. 157.
   Isogenus (Isogenus) nubecula Newm.: Okamoto, 1912, p. 112-113.
   Isogenus nubecula Newm.: Matsumura, 1931. p. 1421; 1933, p. 20 & 30; pl. 5-16 (habitus).

 

Distribution: Honshu.

Japanese name: SHINOBI-AMIME-KAWAGERA

Other Japanese name: AMIME-KAWAGERA (Mats. 1904, 1907), OH-AMIME-KAWAGERA (Okam. 1912) OH-AMI-KAWAGERA (Mats. 1931, 1933)

Images: [Adult] Matsumura, 1904, fig. 39 (habitus); 1907, pl. 10-3 (habitus); 1931. text-fig. (habitus); 1933, pl. 5-16 (habitus).

 

Genus Perlodes Bank, 1903

1. Perlodes frisonanus Okamoto, 1912b
   Perlodes frisonanus Okamoto, 1912

 

Distribution: Honshu.

Japanese name: FURAISON-AMIME-KAWAGERA

 

 

 

Tribe Diploperlini

 

Genus Kogotus Ricker, 1952

Inada (personal communication) recently found three speceis of the genus, even though it is still uncertain which species is the asakawae Kohno.

 

1. "Isoperla" asakawae Kohno, 1941
   Isoperla asakawae Kohno, 1941

    

   Distribution: Honshu.

   Japanese name: ASAKAWA-HIME-KAWAGERA

    

2. ? Kogotus undescribed species A.

    

    

3. ? Kogotus undescribed species B.

 

 

Genus Ostrovus Ricker, 1952

Inada (personal communication) recently found some speceis of the genus, even though the statuses of species nr. 1 and 2 are still uncertain.

 

1. ? Ostrovus mitsukonis (Okamoto & Kohno) in Kohno, 1940a
   • Isogenus (Isogenus) mitsukonis Okamoto & Kohno, in Kohno, 1940a

 

Distribution: Honshu.

Japanese name: KOGUSA-HIME-KAWAGERA

1. ? Ostrovus nikkoensis (Okamoto, 1912)
   Isogenus (Isogenus) nikkoensis Okamoto, 1912b, p. 114, fig. 6 (female terminalia). Syntypes: females from Nikko.

 

Distribution: Honshu.

Japanese name:

KURO-AMIMEKAWAGERA-MODOKI (Okam. 1902)

1. ? Ostrovus sp. A.

Distribution: Honshu.

Images: (photo male adult & terminalia )

1. ? Ostrovus sp. B.

Distribution: Honshu.

1. ? Ostrovus sp. C.

Distribution: Honshu.

1. ? Ostrovus sp. D.

Distribution: Honshu.

1. ? Ostrovus sp. E.

Distribution: Honshu.

 

Genus Stavsolus Ricker, 1952

Stavsolus ainu Teslenko & Minakawa, 1999

• Stavsolus ainu Teslenko & Minakawa, 1999, p. 19-32, figs. 3-12. Holotype: male from Kunashir Island (IBSS).


Distribution: Hokkaido and Kurils.
Japanese name: AINU-HIME-KAWAGERA.

Stavsolus japonicus (Okamoto, 1912)

• Isogenus (Dictyogenus) japonicus Okamoto, 1912, p. 111-2, fig. 4 (female terminalia). Syntypes: females from Honshu.
• Isogenus (Dictyogenus) japonicus: Matsumura, 1931, p. 1421.

 

Distribution: Honshu.
Japanese name: YAMATO-HIME-KAWAGERA;
YAMATO-AMIMEKAWAGERA-MODOKI (Okam. 1912)

Images: [Adult] Matsumura, 1931, text-fig. (habitus); [Photo] male & female.

"Tadamus" scriptus (Klapálek, 1912b)

• Isogenus (Dictyogenus) japonicus Okamoto, 1912, p. 112.
• Isogenus scriptus: Matsumura, 1933, p. 20 & 28-29.

 

Distribution: Honshu.
Japanese name: HIME-AMIME-KAWAGERA.
AMIME-KAWAGERA-MODOKI (Okam. 1912)

Images; [Adults] Matsumura, 1933, pl. 5-11 (habitus).

Genus Tadamus Ricker, 1952

Tadamus kohnonis (Ricker, 1952)

• Isogenus (Tadamus) kohnonis Ricker, 1952

 

Distribution: Honshu.

Japanese name: KÔNO-KAWAGERA

Tadamus sp. A

Diploperlini Gen. A

Species A

Distribution: western Honshu.

Diploperlini Gen. A

Species A

Distribution: Honshu (Aomori & Iwate).

 

 

 

Subfamily Isoperlinae

 

Genus Isoperla Bank, 1841

Isoperla aizuana Kohno, 1953

• Isoperla aizuana Kohno, 1953

 

Distribution: Honshu.

Japanese name: AIZU-KUSA-KAWAGERA

Images: [Photo] (male & female)

Note. "Kaszabia" digittata Kawai, 1963 (Japanese name: TOGE-KUSA-KAWAGERA) maybe a synonym of this species, since Mr. Ishizuka (Tokyo University of Agriculture) found semeral males that have only a paired projection (well developed and less developed types) on tergite III, though typical digittata has two paired projection on terite III and IV.

 

Isoperla fukushimensis Kohno, 1953

• Isoperla fukushimensis Kohno, 1953

 

Distribution: Honshu.

Japanese name: FUKUSHIMA-KUSA-KAWAGERA

 

Isoperla nipponica Okamoto, 1912

• Isoperla nipponica Okamoto, 1912b, p. 127-8. Type, male and females from Aomori and Tokyo.

 

Distribution: Honshu

Japanese name: FUTASUJI-KUSA-KAWAGERA

FUTASUJI-MIDORIKAWAGERAMODOKI    

Images. [Adults] Okamoto, 1912b, frig. 15-16 (male and female terminalia); [Photo] (male)

 

Isoperla motonis (Okamoto, 1912)

• Isogenus (Suzukia) motonis Okamoto, 1912b, p. 110. Types: 2 females from Kyoto.

 

Distribution: Honshu.

Japanese name: ONI-KUSA-KAWAGERA

SUZUKI-AMIME-KAWAGERA-MODOKI (Okam. 1912)

Images: Okamoto, 1912b, fig. 3 (female terminalis).

Note. Isoperla azusana Kohno, 1953 must be a synonym of this species.

 

Isoperla shibakawae Okamoto, 1912

• Isoperla shibakawae Okamoto, 1912b, p. 129-30. Types: a male from Nagano and females from Tochigi.

 

Distribution: Honshu.

Japanese name: YAMA-KUSA-KAWAGERA

OH-MIDORIKAWAGERA (Okam. 1912).

Images [Adults] Okamoto, 1912b, fig. 17 (male terminalis).

 

Isoperla suzukii Okamoto, 1912

• Isoperla suzukii Okamoto, 1912b, p. 129. Types: 3 males from Kyoto and Kumamoto.

 

Distribution: Honshu.

Japanese name: KUSA-KAWAGERA.

MIDORIKAWAGERA-MODOKI (Okam. 1912).

Images [Adults] Okamoto, 1912b, fig. 17 (male terminalis).

 

Isoeprlinae Gen. A

Isoperla uenoi Kawai, 1967

• Isoperla uenoi Kawai, 1967

 

Distribution: Honshu.

Japanese name: UÉNO-KUSA-KAWAGERA

 

Isoeprlinae Gen. B

Isoperla debilis Kohno, 1953a

• Isoperla debilis Kohno, 1953a

 

Distribution: Honshu.

Japanese name: HOSO-KUSA-KAWAGERA

Isoperla okamotonis Kohno, 1941

• Isoperla okamotonis Kohno, 1941

 

Distribution: Honshu.

Japanese name: OKAMOTO-KUSA-KAWAGERA

 

Isoperlinae Gen. C

Isoperla towadensis Okamoto, 1912

• Isoperla towadensis Okamoto, 1912b, p. 127. Type: a female from Towada, Aomori.

 

Distribution: Honshu.

Japanese name: TOWADA-KUSA-KAWAGERA

Other Japanese names: SESUJI-MIDORI-KAWAGERA (Okam. 1912)

Images: [Adults] Okamoto, 1912b, fig. 14 (female terminalia); Several similar species were found from Honshu.

REFERENCES

1. Matsumura, S. 1904. Thousand insects of Japan (Nihon Senchu Zukai). Keiseisha, Tokyo.
2. Matsumura, S. 1907. Insect systematic. Keiseisha Shoten, Tokyo.
3. Matsumura, S. 1931a. 6000 Illustrated Insects of Japan-Empire (Nihon Kontyu Dai Zukan). Tokoshoin, Tokyo.
4. Matsumura, S. 1931b. New genera and new species described in "6000 Illustrated Insects of Japan-Empire". Insecta Matsumurana, 6: 199-200.
5. Matsumura, S. 1933. Illustrated common insects of Japan (Nihon Tuzoku Kontyu Zusetsu). Shunyudo, Tokyo.
6. Okamoto, H. 1912a. Eine neue Gattung und eine neue Art der Japanischen Perliden. Transactions of the Sapporo Natural History Society , 4: 15-18.
7. Okamoto, H. 1912b. Erster Beiträg zur Kenntnis der Japanishen Plecoptera. Transactions of the Sapporo Natural History Society , 4: 105-170.