Lukashevich E.D., Shcherbakov D.E. 2016. On morphology of Tanyderus pictus (Diptera: Tanyderidae) pupa and adult from Chile // Russian Entomol. J. Vol.25. No.1: 79–95 [in English].

Borissiak Paleontological Institute, Russian Academy of Sciences, 117997 Moscow, Russia. ,

KEY WORDS: living fossils, rearing, xylophagy, chaetotaxy, mouthparts, SEM.

ABSTRACT. The male and female pupae of Tanyderus pictus Philippi, 1865 are described, diagnosed, and illustrated for the first time from the specimens collected in Chile. The pupa is distinct from the others known for this family in the cylindrical thoracic horns with the cup-shaped plastron plate at apex, middle leg sheaths shortest, and pairs of protuberances with one central seta surrounded by numerous shorter chaetoids on tergites II–VII. The pupation always occurs inside a log or branch, in the same chamber where larva resided and at least sometimes adult emerges inside the trunk, just where pupation occurred. Several larvae pupated in laboratory and two females emerged, confirming our earlier identification of the larvae as T. pictus and their xylophagy. Photographs of live pupae and female of T. pictus are included. The female mandibles of T. pictus are well developed, sclerotized, and finely toothed along apical margin. The halter of T. pictus and some other tanyderids is provided with a short anterobasal projection corresponding to the prehalter of Ptychopteridae.

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