Hydropsyche

Key for Mature Larvae of Hydropsyche Species of the Maghreb

1 Gills absent on abdominal segment VII.................................................................... 2

- Gills present on abdominal segment VII................................................................... 6

2 Frontoclypeal apotome narrow, almost triangular (width at midlength ~0.8X width of anterior edge) ( Fig. 2A View FIGURE 2 ); prosternites pigmented (Fig. 3A); lateral parts of submentum short and wide ( Fig. 4A View FIGURE 4 ); head and pronotum dark and frontoclypeal apotome with pair of light anterolateral spots ( Fig. 5A View FIGURE 5 )....................................................... H. obscura View in CoL

- Frontoclypeal apotome wide, ogival to subpentagonal (width at midlength subequal to width of anterior edge) ( Fig. 2B View FIGURE 2 ; without combination of other characteristics....................................................................... 3

3 Frontoclypeal apotome with light aboral V-shaped spot narrowly connected with anterolateral spots ( Figs 5B, 5C View FIGURE 5 )........ 4

- Frontoclypeal apotome with blurred light aboral spot not joined with anterolateral spots ( Fig. 5D View FIGURE 5 ).............. H. fezana View in CoL

4 Frontoclypeal apotome with thick, dark median spot not bifurcate anteriorly ( Fig. 5B View FIGURE 5 ).............................. 5

- Frontoclypeal apotome with thick, dark median spot bifurcate anteriorly (Y-shaped) ( Fig. 5C View FIGURE 5 ).......... H. siltalai morph 2

5 Frontoclypeal apotome with light oral spot ( Fig. 5B View FIGURE 5 )........................................... H. siltalai morph 1

- Frontoclypeal apotome without light oral spot ( Allaya 2003: table 1)...................................... H. morla View in CoL

6 Anterior edge of frontoclypeal apotome straight ( Figs 2A, 2B View FIGURE 2 )................................................. 7

- Anterior edge of frontoclypeal apotome convex ( Figs 2C, 2D View FIGURE 2 )................................................ 10

7 Frontoclypeal apotome narrow, almost triangular (width at midlength ~0.8X width of anterior edge) ( Fig. 2A View FIGURE 2 ); pronotum and mesonotum usually uniformly coloured ( Fig. 8B View FIGURE 8 ); if with dark longitudinal band on pronotum, never joining with transversal band on anterior edge ( Zamora-Muñoz et al. 1995: Fig. 9E).................................................... 8

- Frontoclypeal apotome wide, ogival to subpentagonal, width at midlength subequal to width of anterior edge ( Fig. 2B View FIGURE 2 ), pronotum and mesonotum with dark longitudinal band in centre ( Fig. 8A View FIGURE 8 ), on pronotum this band usually joining with transverse band on anterior edge ( Fig. 7A View FIGURE 7 : a2), prosternites rectangular, pigmented (Fig. 3A).................................. H. lobata View in CoL

8 Frontoclypeal apotome with light, Y-shaped aboral mark; oral light spot and anterolateral light spots not joined ( Allaya 2003: table 1)....................................................................................... H. artax View in CoL

- Frontoclypeal apotome with light, V-shaped aboral mark; oral light spot and anterolateral light spots joined or not........ 9

9 Head light brown, with two broad light areas in posterolateral regions ( Fig. 6A View FIGURE 6 : a1), with or without narrow longitudinal dark band on either side of coronal suture ( Fig. 6A View FIGURE 6 : a2); frontoclypeal apotome with oral and anterolateral light spots joined ( Fig. 6A View FIGURE 6 ); posterior prosternites with dark medial regions sub-square (Fig. 3C).............................. H. pellucidula View in CoL

- Head very dark, with two narrow light areas in posterolateral regions ( Fig. 6C View FIGURE 6 : c1), with wide longitudinal dark band on either side of coronal suture ( Fig. 6C View FIGURE 6 : c2); frontoclypeal apotome with oral and anterolateral light spots not joined ( Fig. 6C View FIGURE 6 ); posterior prosternites with dark medial regions rectangular (Fig. 3A)..................................... H. iberomaroccana View in CoL

10 Head in dorsal view with brownish areas of granular appearance on lateral sclerites ( Fig. 5E, 5F View FIGURE 5 ); frontoclypeal apotome narrow, almost triangular ( Fig. 2C View FIGURE 2 ; 5E View FIGURE 5 )................................................................... 11

- Head in dorsal view without brownish area of granular appearance on lateral sclerites ( Fig. 5F View FIGURE 5 ), frontoclypeal apotome with light oral and anterolateral spots joined, two horizontal and symmetrical ovoid black spots present in anterior half of apotome ( Allaya 2003: table 1)........................................................................... H. punica View in CoL

11 Anterior edge of frontoclypeal apotome slightly convex and symmetrical ( Figs. 2C View FIGURE 2 , 5E View FIGURE 5 ); posterior prosternites pigmented (Fig. 3A); submentum homogeneously brown ( Fig. 7B View FIGURE 7 )................................................ H. maroccana View in CoL

- Anterior edge of frontoclypeal apotome deeply convex and asymmetrical ( Figs. 2D View FIGURE 2 , 5F View FIGURE 5 ); posterior prosternites uniformly pale (Fig. 3B); submentum pale posteriorly ( Fig. 7C View FIGURE 7 )................................................... H. resmineda View in CoL