Chlorogomphus kitawakii Karube, 1995

Zhang, Haomiao & Tong, Xiaoli, 2013, Descriptions of the final instar larvae of seven Chinese Chlorogomphidae species, with taxonomic notes on adults (Odonata: Anisoptera), Zootaxa 3620 (2), pp. 223-244 : 225-228

Chlorogomphus kitawakii Karube, 1995

Figures 1–10 , 50 , 60–61 .

Chlorogomphus Selys, 1854: 99 . Type species: Chlorogomphus magnificus Selys, 1854 Chlorogomphus kitawakii Karube, 1995

Chlorogomphus kitawakii Karube, 1995a: 47 –49. Type locality: Mt. Tiantangling, Jinxiu, Guangxi, China.

Material examined. 3 ultimate stadium larvae: 13, 2Ƥ, 04.XII.2009, Sanyatang (23º41'N, 113º47'E), Conghua City, Guangdong Province, China, Haomiao Zhang leg. 1Ƥ and its exuvia, same data, emerged on 24. III. 2010. Medium sized chlorogomphid larva. Ground color brownish yellow or brown with dark brown spots.

Head Labrum and clypeus rectangular, entirely yellow; upper surface of frontal shelf with inconspicuous longitudinal prominence ( Fig. 5 ); mandibles as in Figs. 1–2 . Mandibular formula:

Left mandible with 5 rounded molar crest, a and b pointed, a> b; incisors pointed, 4>3>2>1; right mandible without molar crest, a and b pointed, a> b; incisors pointed, 4>1>3>2, additional tooth y present on right mandible. Labial mask in dorsal view as in Fig. 3 . Prementum with a row of 5 long outer setae and 3–4 smaller inner setae on each side; distal process in dorsal view as in Fig. 4 , with bifid lobes angled.

Thorax Brownish yellow with long hair-like setae, more abundant laterally. Pronotum and synthorax brownish yellow without conspicuous stripes; wing pads narrow, brown in color, reaching hind margin of S4; femora and tibiae brownish yellow with brown stripes submedially.

Abdomen S1–9 with a pair of brown spots centrally, the spots developed on S5–8; S3–8 with a pair of brown crescents laterally; S10 and caudal appendages entirely brownish yellow.

Measurements (mm). Total length 40.0–41.0, width of head 9.5–10.0, hindwing length 9.5, width 4.0, hind femur 7.0, prementum length 7.0, width 8.0.

Description of female adult (hitherto undescribed)

Head with frons not triangularly protruded as in male ( Fig. 6 ). Eyes dark green in life ( Figs. 60–61 ). Labium whitish yellow, labrum entirely black, anteclypeus largely black with lower edge yellow. Postclypeus yellow. Upper edge of antefrons and top of frons with yellow bands. Vertex protruded, with dorsal part flat.

Prothorax black with anterior margin yellow, median lobe with pair of small yellow spots. Synthorax black with following yellow stripes: dorsal stripe tapering to collar; much broader antehumeral stripe contiguous with stripe of mesinfraepisternum; broad stripe on metepisternum; lower margin of metepimeron and metapoststernum yellow ( Fig. 7 ). Wings hyaline, median space with 2 cross veins in all wings; triangles 2-celled in fore wings and 3- celled in hind wings; pterostigmas black, covering 3 cells in fore wings and 3–4 cells in hind wings; anal loop 15- celled. Nodal index: 11-23: 22-12/14-18:17-14. Legs black, coxae and trochanters with yellow rounded spots.

Abdomen very long, black with yellow markings as follows ( Figs. 7–8 ): S1 with one dorsal and two lateral spots; S2 with two oblique lateral stripes on each side connected with posterior yellow ring; posterior margin of S3–6 with pair of dorsolateral spots meeting dorsally close to posterior margin, those on S6 largest; S7–10 entirely black. Vulvar lamina shown in Figs. 9–10 ; lower half of sternite 8 protruded to form V-shaped valve. Sternite 10 prolonged to a semicircular genital plate.

Measurements (mm). Abdomen + appendages 75.0, hindwing 48.5.

Distribution. China (Fujian, Guangxi and Guangdong).

Remarks. The larva is very variable in body maculation. The ground color changes from yellow to dark brown. The larva is similar to larvae of C. nasutus and C. usudai in the prementum, as all three possess 5 long mental setae and bifid lobes that are angled. The shape of the lobes is closer to that of the larva of C. nasutus ( Fig. 16 ) and slightly different from the larva of C. usudai , which possesses bent lobes ( Fig. 34 ); also, C. usudai is much smaller in body size and head width. The larva can be distinguished from the larva of C. nasutus by 1) Sides of synthorax without black stripes; wing pads brown (black in C. nasutus ); 2) S6 without wide black middorsal stripe (with broad middorsal stripe, about 1/3 width of S6, in C. nasutus ); 3) Left mandible with 5 rounded molar crest (6 in C. nasutus ).

Figures

FIGURES 1 – 5. Larva of Chlorogomphus kitawakii: (1) right mandible; (2) left mandible; (3) prementum, dorsal view; (4) bifid branches of distal margin of prementum, dorsal view; (5) frontal shelf, dorsal view.

FIGURES 6 – 10. Female adult of Chlorogomphus kitawakii: (6) head; (7) thorax and abdomen, lateral view; (8) head, thorax and abdomen, dorsal view (9) distal abdominal segments, latero-ventral view; (10) same in lateral view.

FIGURES 50 – 53. Larvae of Chlorogomphidae: (50) Chlorogomphus kitawakii; (51) Chlorogomphus nasutus nasutus; (52) Chlorogomphus papilio; (53) Chlorogomphus shanicus.

FIGURES 60 - 61. Female adult of Chlorogomphus kitawakii: (60) lateral view; (61). dorsal view.

FIGURES 11 – 16. Larva of Chlorogomphus nasutus nasutus: (11) frontal shelf, dorsal view; (12) head, frontal view; (13) right mandible; (14) left mandible; (15) prementum, dorsal view; (16) bifid branches of frontal margin of prementum.

FIGURES 31 – 35. Larva of Chlorogomphus usudai: (31) right mandible; (32) left mandible; (33) prementum, dorsal view; (34) bifid branches of frontal margin of prementum; (35) frontal shelf, dorsal view.