Orthocladius (Pogonocladius) consobrinus (Holmgren, 1869)

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 : 741

Orthocladius (Pogonocladius) consobrinus (Holmgren, 1869)

( Figs 59‒62 )

Chironomus consobrinus (Holmgren, 1869) : 44.

Orthocladius crassicornis Goetghebuer, 1937: 31 .

Material examined. 1 pinned ♁, now mounted on slide, labelled: ‘ Orthocladius crassicornis Gtgh. // type ♁ / M. Goetghebuer // Env. Dublin ( Irlanda) 1948 day men. Humphries // R.I.SC.N.B. 18.073 / Coll. et det. M. Goetghebuer’.

Comments. The specimen is labelled as type, but it does not originate from the type locality, which is the lake of Plön, and the sampling date does not belong to the type material. The preparation is very transparent, but can be examined using phase contrast. Examination of the genitalia suggests that the specimen belongs to O. (P.) consobrinus as evidenced by the very pronounced and pointed crista dorsalis on the gonostylus and the long and slender dorsal lobe of the inferior volsella. Comparison with the lectotype conserved in Naturhistoriska Riksmuseet, Stockholm (NHRM), supports the identification. The synonymy of O. crassicornis with O. (P.) consobrinus by PINDER & CRANSTON (1976) is supported by the present material.

Figures

Figs 59‒62. Orthocladius (Pogonocladius) consobrinus (Holmgren, 1869) (= Orthocladius crassicornis Goetghebuer, 1937). 59 ‒ head, 60 ‒ inferior volsella, 61 ‒ inferior volsella of lectotype of P. consobrinus from NHRM; 62 ‒ gonostylus.