Scaeva selenitica-dignota?

[ivoš]

Czech republik,Moravia,Sviadnov,25.7.2015

[ivoš]

Jest na to polski klucz?

[Grzegorz Banasiak]

Jest, do pobrania tutaj:

http://baza.biomap.pl/pl/getpdf/KdOOP_D ... _nr_42.pdf

[Jacek Kurzawa]

Forget please about key of Bankowska (1963) - it is old and contain only three species: albomaculata, selenitica and pyrastri. Actually are knowing from Poland 3 species: S.dignota, selenitica and pyrastri.
http://syrphidae.insects.pl/checklist.php?lang=pl

Key of Speight (2009):

Male:
5 Frons inflated, very convex; angle between eyes more than 150° (sternites with lateral margins continuously yellow, the black markings often confined to a narrow, longitudinal, median streak) .................. selenitica (Mg.)
----- frons normal, angle between eyes less than 120° ................................................................ dignota (Rondani)

Female:

7 Frons slightly convex; black hairs usually numerous on face, though sometimes face almost entirely whitish-haired; most of the eye surface covered in hairs longer than a posterior ocellus ....................... selenitica (female)
----- frons shallowly concave; facial hairs entirely whitish; much of eye surface covered in hairs shorter than the length of a posterior ocellus and maximum eye-hair-length hardly greater than the length of a posterior ocellus ........................................................................................................................................................ dignota (female)

[Grzegorz Banasiak]

Pytał o polski klucz... poza Bańkowską nic innego nie ma.

[ivoš]

Dziekuje Jacek,Grzegorz.

[ivoš]

Samiec.Kąt między oczami.

[Łukasz Mielczarek]

Samiec to S. selenitica, samica pewnie też.
Samice można sprawdzić na podstawie cech podanych w pracy
http://www.researchgate.net/publication ... _in_Poland

W Polsce S. dignota jest znacznie rzadsza od S. selenitica, oprócz podanych w linkowanej pracy stwierdzeń są również dwa niepublikowane rekordy z ostatnich lat.

Łukasz

[ivoš]

Bardzo dziekuje Lukasz.