Diamesa vaillanti Serra-Tosio, 1972

Magoga, Giulia, Montagna, Matteo, Marziali, Laura, Rossaro, Bruno & Disaa, 2017, Revision of type and non-type material assigned to the genus Orthocladius by Goetghebuer (1940 - 1950), deposited in the Royal Belgian Institute of Natural Sciences (Diptera: Chironomidae), Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 57 (2), pp. 723-749 : 746

Diamesa vaillanti Serra-Tosio, 1972

Diamesa vaillanti Serra-Tosio, 1972: 10 .

Syndiamesa alpina Goetghebuer, 1941: 2 , an invalid junior secondary homonym of D. alpina Tokunaga, 1936 .

Material examined. Syndiamesa alpina : LECTOTYPE: ♁ (slide), labelled: ‘ Syndiamesa alpina n. sp. // Tyrol 12. VIII. 1939 Janets check // = Diamesa vaillanti S. T., E. Willassen rev. 1986 // R.I.SC.N.B. 18.073 / Coll. et det. M. Goetghebuer’. PARALECTOTYPE: ♁ (slide), same locality, labelled ‘ = Diamesa zernyi, E. Willassen rev. 86 // R.I.SC.N.B. 18.073 / Coll. et det. M. Goetghebuer’.

Comments. The lectotype can be confirmed to belong to D. vaillanti , the paralectotype was identified as D. zernyi by Willassen, but the length × width ratio of the gonocoxite (399 × 124‒175) suggests that it belongs to D. vaillanti . The high range width of gonocoxite observed in the paralectotype may be attributed to a different compression and orientation of the right and left gonocoxites; nevertheless, they fall within the range of D. vaillanti , the lectotype gonocoxite length × width ratio = 398 × 140, well in the range of D. vaillanti .