Adicella, McLachlan, 1877

Graf, Wolfram, Waringer, Johann, Dürregger, Alexander & Vitecek, Simon, 2018, Description of the larva of Adicella cremisa Malicky 1972 and a larval key to Central European species of Adicella McLachlan 1877 (Trichoptera: Leptoceridae), Zootaxa 4379 (1) : -

Key to the hitherto known final instar larvae of Adicella species of Europe

(modified from Waringer et al. 2017)

1 Head concolorous, orange to brownish; case cylindrical, curved and smooth, constructed of mineral particles ( Figs. 5A, 5C )...................................................................................................... 2

- Median parts of head orange to brown dorsally, lateral portions of parietalia with distinct, dark brown muscle attachment spots dorsally and ventrally; case with spiral pattern, constructed of plant material ( Figs. 3A, 3G , 4B )........................ 3

2 Abdominal dorsum IX (including both posterolateral setae) with 12 setae; species endemic to Iberic-Macaronesian Region (European Ecoregion I)................................................................ Adicella meridionalis

- Abdominal dorsum IX (including both posterolateral setae) with 14–15 setae ( Fig. 5D ); widespread species outside of European Ecoregion I........................................................................ Adicella filicornis

3 Metanotal setal area sa3 with 13–18 setae per side ( Fig. 4B )....................................... Adicella reducta

- Metanotal setal area sa3 with 1 seta per side ( Fig. 3D )......................................................... 4

4 Each pronotal half with 56–65 setae of varying length; each mesonotal sclerite with 11–13 setae; outermost seta of abdominal dorsum IX setal group ( Waringer et al. 2017: Fig. 12, arrow) approximately as long as width of this segment...................................................................................................... Adicella syriaca

- Each pronotal half with 35–37 setae of varying length; each mesonotal sclerite with 7–8 setae; outermost seta on abdominal dorsum IX approximately half as long as width of this segment.................................... Adicella cremisa

Figures

FIGURE 3. Adicella cremisa larva and Case. 3A, head, thorax, and abdominal segment I, dorsal; 3B, head, thorax, and abdominal segment I, ventral; 3C, head, thorax, and abdominal segment I, right lateral [legs removed]; 3D, head, thorax, and abdominal segment I, right lateral [natural habitus]; 3E, abdominal segments VI–X, right lateral; 3F, abdominal segments VII– X, dorsal; 3G, Case, left lateral; 3H, right foreleg, anterior; 3I, right midleg, anterior; 3J, right hind leg, anterior.

FIGURE 4. Adicella reducta, larva. 4A, head, thorax, and abdominal segment I, dorsal; 4B, head, thorax, and abdominal segment I, ventral; 4C, detail of pronotum, thorax, and abdominal segment I, dorsal; 4D, abdominal segments VI–X, left lateral; 4E, abdominal segments VI–X, dorsal; 4F, head, thorax, and abdominal segment I, right oblique ventrolateral.

FIGURE 5. Adicella filicornis, larva and Case. 5A, head, thorax, and abdominal segment I, dorsal; 5B, head, thorax, and abdominal segment I, ventral; 5C, Case, right lateral; 5D, abdominal segments VI–X, dorsal; 5E, head, thorax, and abdominal segment I,right lateral.