engleski

The larvae of Drusus franzressli Malicky and D. spelaeus (Ulmer) – newbies in the Drusinae grazer clade

The poster gives a description of the hitherto unknown larvae of Drusus franzressli (Malicky 1974) and Drusus spelaeus (Ulmer 1920) which belong to the grazer clade of subfamiliy Drusinae (Trichoptera: Limnephilidae). Information on the morphology of the larvae is given and the most important diagnostic features are illustrated. In the context of already available keys, the larvae of D. franzressli and D. spelaeus key together with Metanoea flavipennis (Pictet 1834), M. rhaetica Schmid 1955, D. improvisus McLachlan 1884, D. nigrescens Meyer-Dür 1875 and Ecclisopteryx malickyi Moretti 1991. The species of this group may be easily separated by differences in dorsal outline and sculpturing of pronotum, presence/absence of lateral gills at 2nd and 3rd abdominal segments, start of lateral fringe and distribution. With respect to distribution, D. franzressli is a large-scale endemic species of the Hellenic western Balkan, whereas D. spelaeus is an endemic of the western Alps (Grenoble area).

Drusine; larval description; grazers

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