Mycetophila idonea Lastovka , 1972

Juergenstein, Siiri, Kurina, Olavi & Poldmaa, Kadri, 2015, The Mycetophilaruficollis Meigen (Diptera, Mycetophilidae) group in Europe: elucidating species delimitation with COI and ITS 2 sequence data, ZooKeys 508, pp. 15-51 : 26-28

Taxon classification Animalia Diptera Mycetophilidae

Mycetophila idonea Lastovka, 1972 Figs 7, 17, 18, 35, 36

Material.

ESTONIA. 1♂, Valga county, Soontaga, 58°01'42,6"N, 26°04'29,3"E, reared from Amanita citrina , coll. 17.ix.2013, emerg. 2.x.2013, S. Jürgenstein leg. (IZBE0200158, in alcohol with terminalia in glycerine, abdomen used for DNA sequence: SJ386). POLAND. 2♂♂, Białowieża 2 km SW, village Gródek, 52°41'02,8"N, 23°49'33,1"E, 17.viii.2007, sweeping, O. Kurina leg. (IZBE0200027, IZBE0200035, in alcohol with terminalia in glycerine, abdomen used for DNA sequence: SJ54, SJ56). SLOVAKIA. 1♂, Muranska planina, near Klak, 48°46'53"N, 019°59'21,3"E, 1211m, 28.v.2009, sweeping, O. Kurina leg. (IZBE0200047, in alcohol with terminalia in glycerine, abdomen used for DNA sequence: SJ317). GEORGIA. 1♂, Dgnali NE of Zhinvali, 42°13'25,9"N, 44°40'12,1"E, 914m, 15.v.2012, sweeping, O. Kurina leg. (IZBE0200055, in alcohol with terminalia in glycerine, abdomen used for DNA sequence: SJ69); 2♂♂, Marelisi SW of Surami, 41°57'56,0"N, 43°17'20,7"E, 412m, 19.v.2012, sweeping, O. Kurina leg. (IZBE0200056, IZBE0200057, in alcohol with terminalia in glycerine, abdomen used for DNA sequence: SJ72, SJ78); 1♂, Kintrishi NP, 41°45'11,7"N, 041°58'38,4"E, 453m, 21.v.2013, sweeping, O. Kurina leg. (IZBE0200058, in alcohol, abdomen used for DNA sequence: SJ327); 1♂, Kintrishi NP, 41°45'11,7"N, 041°58'38,4"E, 453m, 22.v.2013, sweeping, O. Kurina leg. (IZBE0200149, in alcohol, abdomen used for DNA sequence: SJ316); 1♂, Saguramo N of Tbilisi, 41°53'04,3"N, 44°46'46,5"E, 915m, 15.v.2012, sweeping, O. Kurina leg. (IZBE0200059, in alcohol with terminalia in glycerine, abdomen used for DNA sequence: SJ64); 1♂, same as earlier, (IZBE0200060, in alcohol with terminalia in glycerin); 1♂, Saguramo N of Tbilisi, 41°53'08,0"N, 44°46'44,2"E, 889m, 4.ix.2014, sweeping, O. Kurina leg. (IZBE0200237, slide mounted in Euparal); 1♂, Lagotekhi, 41°49'N, 46°17'E, 15. vi– 25.vi.2014, Malaise trap, G. Japoshvili leg. (IZBE0200238, in alcohol with terminalia slide mounted in Euparal).

Male terminalia.

Posterior margin of gonocoxite with slight convexity ventromedially, and with abrupt and blunt projections laterally. Posterior impression with considerably narrow base and widened posterior part. Anterior impression with narrow, anteriorly evenly divergent arms. Ventral branch of gonostylus with posterior process wide and shallow (asymmetrical), with minute warts; spine 1 and spine 2 almost the same high; spine 1 slender, evenly tapering and sharply pointed; spine 2 thicker and blunt; spines 3 and 4 smaller, blunt, with about equal distance between each other and spine 2. Dorsal branch of gonostylus evenly tapering, lateral margin without concavity; distal posterior process about half as high as proximal posterior process, both separated by deep concavity. Distal posterior process bears apical and subapical setae, proximal posterior process bare and apically rounded. Posterior margin proximally from medial bristle with 3-4 gradually diminishing bristles; internal surface with one somewhat stronger seta next to the medial bristle; otherwise the setosity has no special arrangement. Basal angle slightly rounded, basal margin with few setae. Ejaculatory apodeme with concave base and narrow rim. Aedeagus widened apically and truncated. Aedeagal guides with well outlined, wide lateral impressions; apically widened and rounded covering edges of aedeagus. Aedeagal apodemes laterally angular.

Intraspecific variation.

In some specimens from Georgia and Poland the base of the ejaculatory apodeme is blunt, resembling that of Mycetophila strobli . In a few cases the spine 2 on the ventral branch of the gonostylus is slender.

Hosts and distribution.

Mycetophila idonea has been reared from about 65 species of Agaricales and Russulales and also from Boletus impolitus (Yakovlev, 1994). The species is widely recorded from Europe extending to the Middle East and Eastern Palaearctic ( Chandler 2013). The species was erroneously reported as overwintering in Estonian caves by Kurina (1996); after critical study, the material was found to belong to Mycetophila uninotata . However, the occurrence in Estonia is confirmed by a new rearing record presented herein. The material from Georgia represents a new country record.