Cosmocomoidea tremulae ( Bakkendorf, 1934 )

Triapitsyn, Serguei V., Koponen, Martti, Vikberg, Veli & Várkonyi, Gergely, 2020, Taxonomy, annotated new records and a checklist of Mymaridae (Hymenoptera) of Finland, with description of a new species of Eustochus, Acta Entomologica Musei Nationalis Pragae 60 (2), pp. 565-589 : 571

Cosmocomoidea tremulae ( Bakkendorf, 1934)

( Figs 3–4 )

Material examined. Ab: Lohja (labeled as Lojo), Lylyinen, 20.viii.1947, W. Hellén (1 ♀, FMNH). N: Helsinki: Kannelmäki (6682:3383), M. Koponen: 15.vi.1981 (4 ♀♀, FMNH), 25.vi.1981 (1 ♀, FMNH); Viikki: 29.viii.1982, Z. Yang [Yang Zhongqi] (1 ♀, FMNH); (6680:3390), 23.viii.1984, M. Koponen (2 ♀♀, FMNH). Nurmijärvi (6704:3381), edge of old-growth forest, 9.vii.1991, M. Koponen (1 ♀, FMNH). Sipoo, Bakunkärr (6688:3400), 30.viii.1983, M. Koponen (1 ♀, FMNH). Ta: Hämeenlinna (6765:3361), 22.viii.1981, M. Koponen (1 ♀, FMNH). Hartola, Pyhäntaka (6774:3436), grove on a slope, 17.viii.1980, M. Koponen (2 ♀♀, FMNH). Janakkala, V. Vikberg: Hangastenmäki (6755:3369), 16.viii.2013 (25 ♀♀, VVCT); Kalpalinna, Turistirinne (6760:3369): 15.viii.2013 (9 ♀♀, VVCT), 17.viii.2013, swept from Populus tremula (9 ♀♀, VVCT); Turenki, Rotary park (6758:3372): 23.viii.2016 (1 ♂ 1 ♀, VVCT). Sa: Kangasniemi (6875:3487), lake shore, 16.ix.1995, M. Koponen (1 ♀, FMNH).Pertunmaa, Joutsenranta (6823:3474), 5.ix.1982, M. Koponen (1 ♀, FMNH).

Remarks. A single male of C. tremulae from Finland is described and illustrated here ( Figs 3–4 ). Bൺκκൾඇൽඈ*©ൿ (1934) provided a drawing of an antenna of the male of this species from Denmark, without actually describing it. Body (length of dry-mounted specimen 0.85 mm) dark brown to black, antenna brown, legs brown to dark brown except tarsi mostly light brown.

Distribution. Palaearctic Region ( Austria, Denmark, Russia, United Kingdom) (T*©ංൺඉංඍඌඒඇ 2013). New species record for Finland.

Dicopus minutissimus Enock, 1909

Material examined. N: Nurmijärvi, M. Koponen: (6707:3382), 8.viii.1984 (1 ♀, FMNH); (6705:3380), 23.viii.1992 (2 ♂♂ 3 ♀♀, FMNH). Ok: Ristijärvi (7146:3565), 15.viii.1982, M. Koponen (1 ♀, FMNH).

Distribution. Palaearctic Region ( Austria, Bulgaria, Czech Republic, Poland, Romania, Spain, Switzerland, United Kingdom) (Bൺඊඎൾ*©ඈ & Jඈ*©ൽൺඇൺ 2002; T*©ංൺඉංඍඌඒඇ 2015a; Nඈඒൾඌ 2019; Sൺආκඈඏග et al. 2020). New genus and species record for Finland.

Dicopus moscovit Triapitsyn, 2015

( Figs 5–6 )

Material examined. N: Helsinki, Kannelmäki (6682:3383), 26.vii.1980, M. Koponen (1 ♀, FMNH).Nurmijärvi, Murhamäki (6710:3381), spring forest, 1.ix.1993, M. Koponen (2 ♀♀, FMNH).

Remarks. Specimens from Finland, illustrated here to facilitate recognition of this minute species ( Figs 5–6 ), match

well its holotype and the original description (T*©ංൺඉංඍඌඒඇ 2015a). Body length of the dry-mounted, air-dried females

is 0.23–0.30 mm; the body ( Fig. 5A ) is dark brown except mesosoma is a little lighter (brown).

Distribution. Palaearctic Region ( Russia) (T*©ංൺඉංඍඌඒඇ 2015a). New genus and species record for Finland.

Figures

Fig. 3. Cosmocomoidea tremulae (Bakkendorf, 1934), male (Rotarypuisto, Turenki, Tavastia Proper, Finland), habitus in lateral view.

Fig. 4. Cosmocomoidea tremulae (Bakkendorf, 1934), male (Rotarypuisto,Turenki, Tavastia Proper, Finland):A – antenna; B – propodeum; C – genitalia; D – fore and hind wings.

Fig. 5. Dicopus moscovit Triapitsyn, 2015, female: A – habitus in lateral view (Nurmijärvi, Uusimaa, Finland); B – flagellum of antenna (Helsinki, Uusimaa, Finland).

Fig. 6. Dicopus moscovit Triapitsyn, 2015, female (Helsinki, Uusimaa, Finland): A – mesosoma and metasoma, and head (with antennal scapes and pedicels attached); B – fore wing.