Schizopelex huettingeri Malicky 1974

Karaouzas, Ioannis & Waringer, Johann, 2017, The larva of Schizopelex huettingeri Malicky 1974 (Trichoptera: Sericostomatidae), including a preliminary key to the Sericostomatidae larvae of the Hellenic western Balkan region, Zootaxa 4311 (2), pp. 271-279 : 277

Morphological diagnosis of fifth instar larva of Schizopelex huettingeri Malicky 1974 from other European Trichoptera

A summary of morphological features for the identification of European caddisfly families was given by Waringer & Graf (2013). Within the framework of the Sericostomatidae key by Pitsch (1993), Wallace et al. (2003), and Waringer & Graf (2011), larvae of S. huettingeri are separable from other species by possessing the following features:

- pro- and mesonota completely, metanotum incompletely sclerotized (meso- and metanotal sclerites may lack colour; Fig. 6 ms, mt);

- mesonotum divided into pair of large, central sclerites ( Fig. 6 cs) and pair of small, lateral sclerites ( Fig. 6 ls);

- with transportable cases ( Fig. 16 );

- prosternal horn lacking;

- abdominal dorsum IX unsclerotized ( Fig. 14 );

- abdominal segment I with one dorsal and pair of lateral protuberances ( Fig. 11 ).

In the context of the Sericostomatidae larvae of European Ecoregion 6 (Hellenic western Balkan region), the pronotum has a straight ventral margin in S. huettingeri ( Fig. 3 , dotted line) whereas it is curved in Sericostoma flavicorne , S. personatum ( Fig. 18 , dotted line), and Oecismus monedula ( Fig. 19 , dotted line). In S. festiva , present only on the Iberian peninsula, there is a black, comma-like spot on the lateral protuberance.

Figures

FIGURES 5 – 10. Schizopelex huettingeri Malicky 1974, final inStar larva. 5, Head, thoraX and abdominal Segment I, dorSal (p = pronotum, mS = meSonotum, mt = metanotum). 6, Right anterolateral Section of meSonotum (arroWS = Suture betWeen central and lateral meSonotal Sclerite; cS = central Sclerite; lS = lateral Sclerite). 7, Left foreleg, poSterior face. 8, Left midleg, poSterior face. 9, Left hind leg, poSterior face. 10, Abdominal Sternum I (arroWS = Single sa 1 Setae; lp = lateral protuberance Seta). Scale barS: 0.5 mm.

FIGURES 11 – 19. SericoStomatidae genn. Spp., final inStar larvae. FIGURES 11 – 17. Schizopelex huettingeri Malicky 1974: 11, meSo-, metanota, and abdominal SegmentS I and II, right lateral (arroW = lateral protuberance Without black, comma-like marking dorSal of lateral protuberance Seta); 12, abdominal Segment IV, poSterior Section, left lateral, ShoWing roW of Serrate lamellae; 13, abdominal Segment VIII, anterior Section, left lateral, ShoWing roW of forked lamellae; 14, tip of abdomen, dorSal (apS = Setae on dorSum of anal proleg; pdS = Setae on poSterodorSal border of abdominal dorSum IX); 15, tip of abdomen, right dorSolateral (apS = Setae on dorSum of anal proleg; lS = Setae on lateral Sclerite; pdS = Setae on poSterodorSal border of abdominal dorSum IX; arroW = anal claW); 16, larval caSe, right lateral; 17, larval caSe, poSterior foramen reduced in diameter by Silk membrane. FIGURE 18. Sericostoma Sp., pronotum, right lateral (dotted line = curved outline of ventral margin). FIGURE 19. Oecismus monedula (Hagen 1859), pronotum, right lateral (dotted line = curved outline of ventral margin). Scale barS: 0.5 mm.

FIGURES 1 – 4. Schizopelex huettingeri Malicky 1974, final inStar larva. 1, Head, frontal (arroW: antenna). 2, Head, ventral. 3, Head and pronotum, right lateral (arroW = anterior part of coXopleurite; dotted line = Straight ventrolateral margin of pronotum). 4, CoXopleurite, right lateral (arroW = anterior proceSS). Scale barS: 0.5 mm.