Olecryptotendipes Zorina, 2007

Orel, Oksana V., 2022, Additional data on Olecryptotendipes secundus (Zorina, 2003) from Russian Far East, with a description of preimaginal stages (Diptera: Chironomidae), Zootaxa 5205 (1), pp. 87-96 : 95

Key to the species of Olecryptotendipes Zorina from the Russian Far East

Males

1. Acrostichals present; R and R 1 with setae; anal point narrow, parallel-sided; superior volsella with microtrichia ventrally, dorsal seta arising subapically.................................................................... O. lenzi (Zorina)

- Acrostichals absent; R and R 1 without setae; anal point widest at about 2/3 from base; superior volsella lacking microtrichia ventrally, dorsal seta arising apically or subapically ( Fig. 2 )................................... O. secundus (Zorina)

Pupae

1. Frontal setae present without any rod-shaped outgrowth; tergites II–V with rectangular patches of shagreen; anal lobe with 33–37 fringed taeniae..................................................................... O. lenzi (Zorina)

- Frontal setae absent with rod-shaped outgrowth ( Figs 7 , 13 ); tergites I–VI with a median longitudinal band of shagreen; anal lobe with 44–53 fringed taeniae ( Figs 9–12 )............................................... O. secundus (Zorina)

Larvae

1. Mentum slightly concave with triangular median teeth and 7 pairs of lateral teeth; maxillary palp with four 2-segmented sensillae apically.............................................................................. O. lenzi (Zorina)

- Mentum convex with 2 with two identical quadrangular medial and 5 pairs of lateral teeth ( Figs 22 , 29 ); maxillary palp with two 2-segmented and one simple sensillae apically ( Figs 22 , 28 )............................... O. secundus (Zorina)

Figures

FIGURES 1–6. Details of the structure of the adult male of Olecryptotendipes secundus (Zorina). 1—head; 2—variations in the structure of the superior volsella; 3, 4—hypopygium, dorsal view; 5, 6—hypopygium, ventral view. Scale bar 20 µm.

FIGURES 7–12. Details of the structure of the pupa of Olecryptotendipes secundus (Zorina). 7—frontal tubercles; 8—thorax, lateral view; 9—tergites II–III; 10—tergites IV–V; 11—tergites VI–VII; 12—tergites VIII–IX. Scale bar 20 µm.

FIGURES 13–16. Pupa of Olecryptotendipes secundus (Zorina). 13—frontal tubercle; 14—tergites I–II; 15—tergites III–V; 16—tergites VI–VIII. Scale bar 50 µm.

FIGURES 17–24. Details of the structure of the larva of Olecryptotendipes secundus (Zorina). 17—head capsule, dorsal view; 18—head capsule, ventral view; 19—labrum; 120—mandible; 21—antenna; 22—mentum, ventromental plates and maxillary palp; 23—anterior parapods; 24—posterior parapods. Scale bar 20 µm.

FIGURES 25–29. Larva of Olecryptotendipes secundus (Zorina). 25—labrum; 26—antenna; 27—mandible; 28—maxillary palp; 29—mentum and ventromental plates. Scale bar 50 µm.