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) Author Magoga, Giulia ) &) &) Università degli Studi di Milano, Dipartimento di Scienze Agrarie e Ambientali (DISAA), via Celoria 2, I 20133, Milano, Italia; e-mails: giulia. magoga @ unimi. it; matteo. montagna @ unimi. it Author Montagna, Matteo ) &) &) Università degli Studi di Milano, Dipartimento di Scienze Agrarie e Ambientali (DISAA), via Celoria 2, I 20133, Milano, Italia; e-mails: giulia. magoga @ unimi. it; matteo. montagna @ unimi. it Author Marziali, Laura ) &) Water Research Institute, National Research Council (IRSA-CNR), Via del Mulino 19, I 20861 Brugherio (MB), Italy; e-mail: marziali @ irsa. cnr. it Author Rossaro, Bruno ) &) Università degli Studi di Milano, Dipartimento di Scienze per gli Alimenti, la Nutrizione e l’Ambiente (DeFENS), Via Celoria 2, I 20133 Milan, Italy; e-mail: bruno. rossaro @ unimi. it Author Disaa text Acta Entomologica Musei Nationalis Pragae 2017 Acta. Ent. Mus. Natl. Pragae 2017-12-31 57 2 723 749 http://dx.doi.org/10.1515/aemnp-2017-0097 journal article 10.1515/aemnp-2017-0097 0374-1036 5318416 638421F2-985E-43CC-8438-E871F96B1DB8 Lapposmittia succinea ( Goetghebuer, 1942 ) , comb. nov. ( Figs 13–19 ) Orthocladius succineus Goetghebuer, 1942: 664 . Type material examined. Orthocladius succineus : LECTOTYPE and PARALECTOTYPE (here designated): two ♁♁, in isinglass, now mounted on the same slide, labelled: ‘ Orthocladius succineus Goetgh. // Lectotype // Paralectotype // Allemagne 1941 dr. Thienemann // R .I.SC.N.B. 18.073 / Coll. et det. M. Goetghebuer’. The labels “ Lectotype ” and “ Paralectotype ” are added on the slide near the respective specimens, an Indian ink line separates the two specimens . Comments. GOETGHEBUER (1942) wrote in his original publication, in a footnote on page 664: ‘came from the Grossen Plöner See, more precise data on the collecting locality and time cannot be given’. ASHE & O’CONNOR (2012) listed Orthocladius succineus among nomina dubia in Orthocladiinae . The specimens are in very poor condition, but the observable characters allow to conclude that the species fits reasonably well in Lapposmittia because of bare wings, eyes and squama, well visible pulvilli, a transparent triangular anal point, well developed virga, a sternapodeme with oral projections, inferior volsella with a rectangular dorsal lobe, and a gently curved gonostylus without crista dorsalis. The generic diagnosis must be emended, because the costa is moderately extended, the antennal plume is not reduced, and the sternapodeme has only moderately developed anterior projections.