Goeridae, Ulmer, 1903

Waringer, Johann, Graf, Wolfram, Sipahiler, Füsun & Malicky, Hans, 2017, The larvae of Silo chrisiammos Malicky 1984 and Lithax musaca Malicky 1972 (Trichoptera: Goeridae), including a key to the Goeridae larvae of the Eastern and Hellenic western Balkan regions, Zootaxa 4306 (1), pp. 67-80 : 73

Key to the final instar Goeridae larvae of European Ecoregion 6 (Hellenic western Balkan) and 7 (Eastern Balkan)

1 With 4 mesonotal and 6 metanotal sclerites (Fig. 27); pronotum with low central hump covered with spines (Fig. 28, dotted oval)....................................................................... Goera pilosa ( Fabricius 1775)

- With 6 mesonotal and 8 metanotal sclerites ( Fig. 7 ); pronotum without central hump or with larger central hump........ 2

2 Dorsal humps are lacking at the pronotum (Fig. 29)..........................................................3

- Pronotum with 1 or 3 dorsal humps ( Figs. 6 , 30).............................................................5

3 In dorsal view, distal section of each mesepisternum tapering to blunt apex ( Figs. 7 m, 25)............................ 4

- In dorsal view, distal section of each mesepisternum parallel-sided and apically rounded ( Fig. 31 , arrow)............................................................................................ Lithax obscurus ( Hagen 1859)

4 Without posterior face setae at the proximal half of the fore femur (Fig. 32); pronotal muscle attachment spots bordered by black dots (Fig. 33)............................................................. Silo nigricornis ( Pictet 1834)

- With posterior face setae at the proximal half of the fore femur (Fig. 34); pronotal muscle attachment spots not bordered by black dots (Fig. 35)................................................................ Silo piceus ( Brauer 1857)

5 Pronotum with one central hump only ( Figs. 6 , 22 )...........................................................7

- Pronotum with one central and two lateral humps (Figs. 30, 36)................................................ 6

6 Pronotum with one large central hump reaching the posterior pronotal margin (Fig. 30a) and two smaller lateral humps (Fig. 30b)............................................................................ Silo graellsii Pictet 1865

- Pronotum with three small pale-colored dorsal humps of equal size, central hump never reaching posterior pronotal margin (Fig. 36)..................................................................... Silo pallipes ( Fabricius 1781)

7 Pronotal hump noselike ( Fig. 6 n), descending stepwise to pronotal surface distinctly anterior of posterior pronotal border ( Fig. 6 , arrow)................................................................... Silo chrisiammos Malicky 1984

- Pronotal hump ridge-like ( Fig. 21 ), gently and gradually descending to pronotal surface immediately at posterior pronotal bor- der ( Fig. 22 , arrow)........................................................... Lithax musaca Malicky 1972

Figures

FIGURE 31, Lithax obscurus (Hagen 1859), final instar larval thorax, dorsal. FIGURES 32 – 33, Silo nigricornis (Pictet 1834), final instar larva: 32, left forefemur, posterior face (dotted oval = area lacking proximal face setae); 33, detail of pronotal muscle attachment spots. FIGURES 34 – 35, Silo piceus (Brauer 1857), final instar larva: 34, left forefemur, posterior face (dotted oval = proximal face setae); 35, detail of pronotal muscle attachment spots. FIGURE 36, Silo pallipes (Fabricius 1781), final instar larval pronotum, right posterolateral (arrows = pale-colored dorsal humps of equal size). Scale bars: 1 mm (Figs. 31, 36) and 0.5 mm (Figs. 32, 33, 34, 35).

FIGURES 7 – 12, Silo chrisiammos Malicky 1984, final instar larva: 7, thorax, dorsal (m = left mesepisternum; numbers 1 – 4 = arbitrarily assigned sclerite numbers on meso- and metanota); 8, right foreleg, posterior face; 9, right midleg, posterior face; 10, right hind leg, posterior face; 11, abdominal segment I, right lateral; 12, abdominal segment I, ventral. Scale bars: 1 mm.

FIGURES 1 – 6, Silo chrisiammos Malicky 1984, final instar larva: 1, larva, frontal (black arrow: antenna); 2, head, frontal (d: parietal dent); 3, head, right lateral; 4, head, ventral; 5, pronotum, dorsal (d = pronotal dent; n = nose-shaped central bulge; s = partial transverse suture). 6, pronotum, right lateral (d = pronotal dent; n = nose-shaped central hump; arrow = posterior end of central hump descending to pronotal surface distinctly anterior of caudal pronotal border). Scale bars: 1 mm (Figs. 1, 2, 4, 5, 6) and 0.5 mm (Fig. 3).

FIGURES 20 – 24, Lithax musaca Malicky 1972, prepupa: 20, head, ventral; 21, pronotum, right dorsolateral (d = pronotal dent with honeycomb sculpturing; n = nose-shaped central hump); 22, pronotum, right posterolateral (arrow = posterior end of central hump descending to pronotal surface at caudal pronotal border); 23, left pronotal dent, detail of honeycomb pattern; 24, head, thorax and anterior abdomen, dorsal (numbers 1 – 4: arbitrarily assigned sclerite numbers on meso- and metanota). Scale bars: 1 mm (Figs. 21, 22, 24) and 0.5 mm (Figs. 20, 23).