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Fig. 10 in Taxonomy, larval morphology and cytogenetics of Lihelophorus, the Tibetan endemic subgenus of Helophorus (Coleoptera: Hydrophiloidea)

Fig. 10. Head capsule of the first instar larva of Helophorus (Lihelophorus) yangae sp. nov. a – ventral view; b – dorsal view; c – lateral view.

Fig. 9 in Taxonomy, larval morphology and cytogenetics of Lihelophorus, the Tibetan endemic subgenus of Helophorus (Coleoptera: Hydrophiloidea)

Fig. 9. Association of reared larvae and field-collected adults of Helophorus (Lihelophorus) based on cox1 sequences. a – Bayesian inference of newly obtained and available GenBank sequences; b–c – habitus of reared larvae (b – H. yangae sp. nov.; c – H. lamicola Zaitzev, 1908).

Fig. 6 in Taxonomy, larval morphology and cytogenetics of Lihelophorus, the Tibetan endemic subgenus of Helophorus (Coleoptera: Hydrophiloidea)

Fig. 6. Aedeagophores of Helophorus (Lihelophorus) species. a–e – H. (L.) ser Zaitzev, 1908 (a – lectotype, Qinghai: valley of Alag Hu lake; b–c – Xizang: valley SE of Dong La pass; d – Qinghai: Golo, 20 km E of Maduo; e – Qinghai: Zuimatan). f–j – H. (L.) lamicola Zaitzev, 1908 (f – lectotype, Qinghai: Djarin Nor; g–i – Qinghai: Zuimatan; j – paralectotype, Xizang: S of Arka-tagh, 5073 m a.s.l., lgt. S. Hedin). k–o – H. (L.) yangae sp. nov. (k – holotype, Qinghai: Zuimatan; l–m – paratypes, same locality; n – Qinghai: Golo, Yematan; o – Xizang: Gongbujiangda).

Fig. 5 in Taxonomy, larval morphology and cytogenetics of Lihelophorus, the Tibetan endemic subgenus of Helophorus (Coleoptera: Hydrophiloidea)

Fig. 5. Details of the head and pronotum of the Helophorus (Lihelophorus) yangae sp. nov. (a – Xizang: 90 km W of Amdo; b,d – Qinghai: Golo; c – Xizang: 25 km W of Amdo; e – India: Kar Tso (Orchymont coll.). Not to scale.

Fig. 2 in Taxonomy, larval morphology and cytogenetics of Lihelophorus, the Tibetan endemic subgenus of Helophorus (Coleoptera: Hydrophiloidea)

Fig. 2. Adult morphology of Helophorus (Lihelophorus). a–f – details of left half of pronotum (a,c,e) and base of left elytron (b, d, f): a–b – H. yangae sp. nov.; c–d – H. ser Zaitzev, 1908; e–f – H. lamicola Zaitzev, 1908; arrow in (a) shows remnants of pronotal granulations, arrows in (b, d, f) show scutellary stria. g–h – prothoracic hypomeron and 'suprapleural area' (g – H. yangae sp. nov.; h – H. ser). i – detail of posterior margin of abdominal ventrite 5 of H. ser, showing the irregular denticulation. j – ventral view of the thorax of H. ser. k – dorsolateral portion of left elytron of H. lamicola. Abbreviations: ep – epipleuron; li – last elytral interval. Not to scale.

Fig. 15 in Taxonomy, larval morphology and cytogenetics of Lihelophorus, the Tibetan endemic subgenus of Helophorus (Coleoptera: Hydrophiloidea)

Fig. 15. Thorax and abdomen of Lihelophorus and Helophorus s.str. a–d – metathoracic legs (a – H. (H.) liguricus Angus, 1970, frontal view; b–c – H. (Lihelophorus) yangae sp. nov. (b – frontal; c – posterior); d – H. (Lihelophorus) lamicola Zaitzev, 1908). e–f – thorax and first abdominal segments of H. (Lihelophorus) yangae sp. nov. (e – lateral view; f – dorsal view). g–h – abdominal segments (dorsal and ventral views): g – H. (Lihelophorus) yangae sp. nov.; h – H. (Lihelophorus) lamicola Zaitzev, 1908. i–j – abdominal segment 9 and urogomphi: i – H. (H.) liguricus Angus, 1970; j – H. (Lihelophorus) yangae sp. nov. Abbreviations: abd1 – abdominal segment 1; msth – mesothorax; mtth – metathorax; pth – prothorax; sp – spiracle.

Fig. 1 in Taxonomy, larval morphology and cytogenetics of Lihelophorus, the Tibetan endemic subgenus of Helophorus (Coleoptera: Hydrophiloidea)

Fig. 1. Adult morphology of Helophorus (Lihelophorus). a–b – H. yangae sp. nov. (a – ventral view of the head; b – detail of mentum and labial palps); c–d – maxillary galea and lacinia (c – H. yangae sp. nov.; d – H. ser Zaitzev, 1908); e–f – mandible (e – H. yangae sp. nov.; f – H. ser); g – labial palpus of H. ser; h–l – hind legs in dorsal view (h – H. yangae sp. nov.; i – H. ser; j – H. lamicola Zaitzev, 1908; k – detail of apex of tibia and base of tarsus of H. lamicola; l – detail of tarsomere 5 and claw of H. ser). Abbreviations: sh – swimming hairs. Not to scale.

Fig. 11 in Taxonomy, larval morphology and cytogenetics of Lihelophorus, the Tibetan endemic subgenus of Helophorus (Coleoptera: Hydrophiloidea)

Fig. 11. Head capsules of first instar larvae of Lihelophorus and Helophorus s.str. a–b – H. (Lihelophorus) lamicola Zaitzev, 1908 (a – ventral; b – dorsal). c–d – H. (H.) liguricus Angus, 1970 (c – ventral; d – dorsal).

Fig. 4 in Taxonomy, larval morphology and cytogenetics of Lihelophorus, the Tibetan endemic subgenus of Helophorus (Coleoptera: Hydrophiloidea)

Fig. 4. Details of the head and pronotum of the Helophorus (Lihelophorus) specimens. a–c – H. lamicola Zaitzev, 1908 (a – Qinghai: Zhaling Hu (lectotype); b–c – Qinghai: Golo). d–h – H. ser Zaitzev, 1908 (d – Qinghai: valley of Alag Hu lake (lectotype); e–f – Qinghai: Golo; g – Xizang, Nyainqentanglha Feng; h – Gansu: Xiahe env.). Not to scale.

Fig. 18. Meiosis metaphase II in Taxonomy, larval morphology and cytogenetics of Lihelophorus, the Tibetan endemic subgenus of Helophorus (Coleoptera: Hydrophiloidea)

Fig. 18. Meiosis metaphase II from testes of Helophorus (Lihelophorus) species from Qinghai: Zuimatan. a–b – H. lamicola Zaitzev, 1908 (a – with y chromosome; b – with X chromosome). c – H. ser Zaitzev, 1908, with X chromosome. d–e – H. yangae sp. nov. (d – with y chromosome; e – with X chromosome).

Fig. 8 in Taxonomy, larval morphology and cytogenetics of Lihelophorus, the Tibetan endemic subgenus of Helophorus (Coleoptera: Hydrophiloidea)

Fig. 8. Immature stages of Lihelophorus. a–d – head and prothorax of first instar larvae: a–b – H. (Lihelophorus) lamicola Zaitzev, 1908 (a – dorsal; b – ventral); c–d – H. (Lihelophorus) yangae sp. nov. (c – dorsal; d – ventral). e–f – egg cases: e – H. (Lihelophorus) lamicola Zaitzev, 1908; f – H. (Lihelophorus) yangae sp. nov.; g–j – abdomen with spiracles containing air bubbles: g–h – H. (Lihelophorus) lamicola Zaitzev, 1908 (g – tracheal gills and its tracheal system; h – detail of tracheal branching around abdominal spiracle); i–j – H. (Lihelophorus) yangae sp. nov. (i – detail of tracheal system around abdominal spiracles; j – tracheal system of abdomen). Abbreviations: sp – spiracle; trg – tracheal gill.

Fig. 14 in Taxonomy, larval morphology and cytogenetics of Lihelophorus, the Tibetan endemic subgenus of Helophorus (Coleoptera: Hydrophiloidea)

Fig. 14. Head appendages of larvae of Lihelophorus and Helophorus s.str. a–b – labium of H. (H.) liguricus Angus, 1970 (a – ventral; b – dorsal). c–h – maxilla: a–d – H. (H.) liguricus (c – ventral; d – dorsal); e–f – H. (Lihelophorus) yangae sp. nov. (e – ventral; f – dorsal); g–h – H. (Lihelophorus) lamicola Zaitzev, 1908 (g – ventral; h – dorsal).

Figs. 30–34 in Taxonomy of Stenomicra cogani, with description of S. gracilior sp. nov. from Turkey and comparative morphology of terminalia in Stenomicridae (Diptera)

Figs. 30–34. Stenomicra gracilior sp. nov., female (paratype). 30 – abdomen dorsally; 31 – same, ventrally; 32 – spermathecae; 33 – postabdomen dorsally; 34 – same, ventrally. Scales = 0.2 mm (Figs. 30, 31), 0.05 mm (Fig. 32) and 0.1 mm (Figs. 33, 34). For abbreviations see text (p. 701).

Figs. 21–23 in Taxonomy of Stenomicra cogani, with description of S. gracilior sp. nov. from Turkey and comparative morphology of terminalia in Stenomicridae (Diptera)

Figs. 21–23. Stenomicra gracilior sp. nov., male (holotype). 21 – head frontally; 22 – head, laterally; 23 – f2 anteriorly. Scales = 0.2 mm. For abbreviations see text (p. 701).

Figs. 5–6 in Taxonomy of Stenomicra cogani, with description of S. gracilior sp. nov. from Turkey and comparative morphology of terminalia in Stenomicridae (Diptera)

Figs. 5–6. Wings of Stenomicra species. 5 – Stenomicra cogani Irwin, 1982, female (Czech Republic: N. Bohemia), length 1.95 mm; 6 – S. gracilior sp. nov., male (holotype), length 1.63 mm. Photo by J. Roháček.

Figs. 7–14. Stenomicra cogani Irwin, 1982, male. 7 in Taxonomy of Stenomicra cogani, with description of S. gracilior sp. nov. from Turkey and comparative morphology of terminalia in Stenomicridae (Diptera)

Figs. 7–14. Stenomicra cogani Irwin, 1982, male. 7 – external genitalia, caudally; 8 – genitalia, laterally; 9 – gonostylus, subventrally, widest extension; 10 – genitalia and pregenital synsternum S6–S8 in situ, ventrally; 11 – part with original S6, ventrally; 12 – same, another variant; 13 – internal genitalia, laterally (with ea omitted); 14 – filum of distiphallus, anteroventrally. Figs. 7, 12 based on specimen from Romania: Banat, others on specimens from England. Scales = 0.1 mm (Figs. 7, 8, 10), and 0.05 mm (Figs. 9, 12–14). For abbreviations see text (p. 701).

Figs. 24–29 in Taxonomy of Stenomicra cogani, with description of S. gracilior sp. nov. from Turkey and comparative morphology of terminalia in Stenomicridae (Diptera)

Figs. 24–29. Stenomicra gracilior sp. nov., male (holotype). 24 – external genitalia, caudally; 25 – genitalia, laterally; 26 – gonostylus, subventrally, widest extension; 27 – filum of distiphallus, anteroventrally; 28 – internal genitalia, laterally; 29 – pregenital synsternum S6–S8, ventrally. Scales = 0.1 mm (Figs. 24, 25) and 0.05 mm (Figs. 27–29). For abbreviations see text (p. 701).

Figs. 35–38 in Taxonomy of Stenomicra cogani, with description of S. gracilior sp. nov. from Turkey and comparative morphology of terminalia in Stenomicridae (Diptera)

Figs. 35–38. Podocera delicata (Collin, 1944), female (Czech Republic: N Bohemia). 35 – spermathecae; 36 – postabdomen with posterior part of T5, dorsally; 37 – postabdomen with S5, ventrally; 38 – genital chamber with ventral receptacle and spermathecae, laterally. Scales = 0.05 mm (Figs. 35, 38) and 0.1 mm (Figs. 36, 37). For abbreviations see text (p. 701).

Figs. 1–4. Stenomicra cogani Irwin, 1982 in Taxonomy of Stenomicra cogani, with description of S. gracilior sp. nov. from Turkey and comparative morphology of terminalia in Stenomicridae (Diptera)

Figs. 1–4. Stenomicra cogani Irwin, 1982 (Czech Republic: N Bohemia). 1 – female (body length ca. 2 mm) sitting on leaf of Scirpus sylvaticus; 2 – same, dorsal view; 3 – male (body length ca. 1.5 mm) on the same leaf; 4 – male, head and thorax laterally (from dry mounted specimen). Photo by J. Roháček (Figs. 1–3) and M. Deml (Fig. 4).

Figs. 15–20. Stenomicra cogani Irwin, 1982 in Taxonomy of Stenomicra cogani, with description of S. gracilior sp. nov. from Turkey and comparative morphology of terminalia in Stenomicridae (Diptera)

Figs. 15–20. Stenomicra cogani Irwin, 1982, female (Czech Republic: N Bohemia). 15 – abdomen dorsally; 16 – same, ventrally; 17 – genital chamber with ventral receptacle and spermatheca, laterally; 18 – spermathecae; 19 – postabdomen, dorsally; 20 – S5 and postabdomen ventrally. Scales = 0.2 mm (Figs. 15, 16), 0.05 mm (Figs. 17, 18) and 0.1 mm (Figs. 19, 20). For abbreviations see text (p. 701).