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FIGURES 15–20 in Description of the last stadium larva and female of Microgomphus thailandica Asahina, 1981 (Odonata: Gomphidae)

FIGURES 15–20. Microgomphus thailandica Asahina: (15) antenna, dorsal view; (16) right mandible, ventral and internal views; (17) left mandible, ventral and internal views; (18) right maxilla, ventral view; (19) ventral view of prementum; (20) dorsal view of anal appendages of exuviae. Scale = 1 mm (15, 19, 20), 0.2 mm (16, 17, 18).

FIGURES 4–7 in Description of the last stadium larva and female of Microgomphus thailandica Asahina, 1981 (Odonata: Gomphidae)

FIGURES 4–7. Microgomphus thailandica Asahina: (4) head, male, frontal view; (5) pterothoracic pattern, male, dorsal view; (6) caudal appendages, male, dorsal view; (7) caudal appendages, male, lateral view. Scale = 1 mm.

FIGURES 2–3 in Description of the last stadium larva and female of Microgomphus thailandica Asahina, 1981 (Odonata: Gomphidae)

FIGURES 2–3. Microgomphus thailandica Asahina: (2) male, dorsal view; (3) female, dorsal view. Scale = 5 mm.

FIGURE 12–13 in Description of the last stadium larva and female of Microgomphus thailandica Asahina, 1981 (Odonata: Gomphidae)

FIGURE 12–13. Microgomphus thailandica Asahina: (12) wing venation, female; (13) pterothoracic and abdomen patterns, female, side view. Scale = 5 mm.

FIGURES 8–11 in Description of the last stadium larva and female of Microgomphus thailandica Asahina, 1981 (Odonata: Gomphidae)

FIGURES 8–11. Microgomphus thailandica Asahina: (8) head, female, frontal view; (9) pterothoracic pattern, female, dorsal view; (10) caudal appendages, female, dorsal view; (11) valvula vulvae, female, ventral view. Scale = 1 mm.

FIGURE 3 in Microgomphus alani (Odonata, Gomphidae) sp. nov. from Cambodia

FIGURE 3. Idealised outlines of morphological details of the holotype (a-b, e-f) and paratype (c-d) of Microgomphus alani: a,c—hamuli, lateral view; b,d—hamuli, right hamuli, ventral view; e—anal appendages, dorsal view; f—head and thorax, lateral view; b—head and synthorax, frontal view; c—anal appendages, dorsal view; d—ditto, lateral view. Not to scale.

FIGURE 2 in Microgomphus alani (Odonata, Gomphidae) sp. nov. from Cambodia

FIGURE 2. Morphological details of the holotype (a-f, h) and paratype (g) of Microgomphus alani: a—head and thorax, lateral view; b—head and synthorax, frontal view; c—anal appendages, dorsal view; d—ditto, lateral view; e—ditto, ventral view; fsecondary genitalia, lateral view; g—hamuli, lateral view; h—hamuli, ventral view. Not to scale.

FIGURE 5 in Microgomphus alani (Odonata, Gomphidae) sp. nov. from Cambodia

FIGURE 5. Habitats of Microgomphus alani: a—the type locality, Cambodia, Koh Kong Province, 17 km ENE of Koh Kong, 'Macromia Rivulet', 11°40'17'' N, 103°07'28'' E, 296 m a.s.l., 3 vi 2014; b—the habitat of the paratype, Cambodia, Koh Kong Province, 6.5 km SW Thma Bang village, the 'Microgomphus River', the slow reach upstream the bridge, 15 iv 2010.

FIGURE 1 in Microgomphus alani (Odonata, Gomphidae) sp. nov. from Cambodia

FIGURE 1. Microgomphus alani: general habitus of the holotype (a) and paratype (b) males and the wings of the holotype (c). Not to scale.

FIGURE 4 in Microgomphus alani (Odonata, Gomphidae) sp. nov. from Cambodia

FIGURE 4. Distal part (median and distal segments and posterior lobe) of the penis of the holotype of Microgomphus alani: a—lateral view; b—dorsolateral view; c—ventral view. Not to scale.

FIGURE 7 in Description of a female and variation of Microgomphus alani Kosterin, 2016 (Odonata: Gomphidae) in Cambodia, with a note on sexual dimorphism in Microgomphus spp.

FIGURE 7. Hind legs of Microgomphus alani, a—male from Mondulkiri Province, 13 vi 2014; b—female from Modulkiri Province, 3 viii 2016; c—female from Phnom Kulen Mts, 30 vi 2018. Scale bar 1 mm.

FIGURE 2 in Description of a female and variation of Microgomphus alani Kosterin, 2016 (Odonata: Gomphidae) in Cambodia, with a note on sexual dimorphism in Microgomphus spp.

FIGURE 2. Dry male (a, d–e) and female (b–c, f) specimens of Microgomphus alani from the Phnom Kulen Mountains, Siem Reap Province (a–c) and Mondulkiri Province (d–f) of Cambodia, collected on 3 viii 2016 (f), 11 vi 2018 (c), 17 vi 2018 (a), 30 vi 2018 (b) and 26 vi 2018 (d–e).

FIGURE 1 in Description of a female and variation of Microgomphus alani Kosterin, 2016 (Odonata: Gomphidae) in Cambodia, with a note on sexual dimorphism in Microgomphus spp.

FIGURE 1. Male (a, d–e) and female (b–c) specimens of Microgomphus alani in live colours from the Phnom Kulen Mountains, Siem Reap Province (a–c) and Mondulkiri Province (d–e) of Cambodia, 11 vi 2018 (c), 17 vi 2018 (a), 30 vi 2018 (b) and 26 vi 2018 (d–e). Not to scale

FIGURE 6 in Description of a female and variation of Microgomphus alani Kosterin, 2016 (Odonata: Gomphidae) in Cambodia, with a note on sexual dimorphism in Microgomphus spp.

FIGURE 6. Details of female specimens of Microgomphus alani collected in Mondulkiri Province on 3 viii 2016 (c,e; the same specimen as in Fig. 2f) and in the Phnom Kulen Mts on 11 vi 2018 (a,f; the same specimen as in Fig. 1c and Fig 2c) and on 30 vi 2018 (b,d,g; the same specimen as in Figs 1b, 2b): a–b—head and thorax, lateral view; c–d—pterothorax, dorsal view; e–g—vulvar lamina, ventral view. Scale bars, from top to bottom, 4 mm, 2 mm and 0.5 mm.

FIGURE 5 in Description of a female and variation of Microgomphus alani Kosterin, 2016 (Odonata: Gomphidae) in Cambodia, with a note on sexual dimorphism in Microgomphus spp.

FIGURE 5. Frontal view of head (left) and occiput (right) of female specimens of Microgomphus alani collected on 3 viii 2016 in Mondulkiri Province (a; the same specimen as in Fig. 2f) and in the Phnom Kulen Mts on 11 vi 2018 (b, the same specimen as in Figs 1c, 2c) and 30 vi 2018 (c, the same specimen as in Figs 1b, 2b). Scale bar 1 mm.

FIGURE 3 in First descriptions of the final stadium larva of Heliogomphus chaoi Karube, 2004 and the adult female of Microgomphus jurzitzai Karube, 2000 from Vietnam (Odonata: Gomphidae)

FIGURE 3. Larva of Heliogomphus chaoi. (A) left labial palp, dorsal view; (B) left labial palp, ventral view; (C) genae, ventral view; (D) maxilla, dorsal view; (E) teeth on maxilla, vental view; (F) right mandible, internal view; (G) left mandible, internal view; (H) right mandible, ventral view; (I) left mandible, ventral view.

FIGURE 2 in First descriptions of the final stadium larva of Heliogomphus chaoi Karube, 2004 and the adult female of Microgomphus jurzitzai Karube, 2000 from Vietnam (Odonata: Gomphidae)

FIGURE 2. Larva of Heliogomphus chaoi. (A) right antenna, dorsal view; (B) distal end of antenna enlarged; (C) labium, dorsal view; (D) prementum, ventral view; (E) clusters of small spiniform premental setae enlarged; (F) clusters of distinct SPS enlarged; (G) ligula, dorsal view.

FIGURE 5 in First descriptions of the final stadium larva of Heliogomphus chaoi Karube, 2004 and the adult female of Microgomphus jurzitzai Karube, 2000 from Vietnam (Odonata: Gomphidae)

FIGURE 5. Larva of Heliogomphus chaoi. (A) anal appendages, dorsal view; (B) anal appendages, ventral view; (C) anal appendages, lateral view.

FIGURE 7 in First descriptions of the final stadium larva of Heliogomphus chaoi Karube, 2004 and the adult female of Microgomphus jurzitzai Karube, 2000 from Vietnam (Odonata: Gomphidae)

FIGURE 7. Distribution of Heliogomphus chaoi (red circles) and Microgomphus jurzitzai (blue circle) in Vietnam.

FIGURE 10 in First descriptions of the final stadium larva of Heliogomphus chaoi Karube, 2004 and the adult female of Microgomphus jurzitzai Karube, 2000 from Vietnam (Odonata: Gomphidae)

FIGURE 10. Larvae of Heliogomphus chaoi [A, C, E, G] and Microgomphus svihleri [B, D, F, H]. (A–B), antenna; (C–D), genae; (E–F), postfrons; (G–H), S6–10, ventral view. Arrow = anterolateral suture of sternite S7.