Protonemura microstyla Martynov

Zhiltzova, L. A., Cherchesova, S. K. & Dzhioeva, I. E., 2012, Description Of The Larva Of The Caucasian Species Protonemura Microstyla Martynov (Plecoptera, Nemouridae), Illiesia 8 (17), pp. 158-161 : 158-161

Protonemura microstyla Martynov

( Figs. 1-6 )

Protonemura microstyla Martynov 1928:27-28 , Tabl. II, Figs. 8-11.

Material examined. Minor Caucasus, Trialetzky Range, Bakuriani, 13-20 V 1986, 27 larvae (L. Zhiltzova leg.).

Larva ( Figs. 1-6 ). Length of body 6–8 mm, length of cercus equal to length of abdomen and notum. Larva stocky, brownish, mat, head darker than pronotum. Temporal parts of head weakly projecting behind eyes and bearing a row of short setae ( Fig. 1 ).

Pronotum trapezoid, slightly narrowed backwards, noticeably wider than head, with rounded angles, margins with dense row of very short, blunt setae ( Figs. 3-4 ).

Abdominal segments 1-5 (and possibly 6) divided on tergite and sternite. Femora with dense short setae along hind margin, with long stripe from above.

Wing pads are wide and blunt, with projecting lateral edge in fore part of wing pad. Setae on tergal surface are short and rather dense. Along hind margin setae are also short, but with two pair of setae slightly longer than others ( Fig. 5 ).

Sternite 9 of male larvae with distinctly outlined subgenital plate, narrowed toward apex ( Fig. 2 ); paraprocts of male larvae triangular and elongated. Abdomen brownish, the same color as other parts of body, with an obscure longitudinal light band medially. Cerci long and thin, approximately 20- segmented, with dense short apical setae ( Fig. 6 ).

Diagnosis. 1) abdominal segments 1-5 divided on tergite and sternite (Segments 1-4 in P. bifida ); 2) the larva of P. microstyla differs from the larva of P. bifida by very short blunt setae on pronotum margins, and 3) by short paired setae on hind margin of abdominal tergites.

Figures

Figs. 1-2. Larva of Protonemura microstyla Martynov. 1. Habitus, dorsal. 2. Apex of male abdomen, ventral.

Figs. 3-6. Larva of Protonemura microstyla Martynov. 3. Pronotum of larva, dorsal. 4. Setae of lateral border of pronotum. 5. Setae of hind margin of abdominal tergite. 6. Cercus of larva.