Calicnemia chaoi, Wilson, 2004

K. D. P. Wilson, 2004, New Odonata from South-China, Odonatologica 33 (4), pp. 423-432 : 428-429

CALICNEMIA CHAOI SP. NOV.

Figures 15-21

Material. — Holotype ♂: Pengshan ( Dadingshan ), Shikengkong , N Guangdong, China, l-VII-2000, K.D.P. Wilson leg. — Allotype: ♀, ditto, l-VII-2000. — Paratypes: 1 ♂, Henglongbei, Shikengkong , 28- - VI- 2002 ; 7 ♂, 1 ♀, Dadingshan , Shikengkong ,N Guangdong, 30-V-2000; 1 ♂, Longtanjiao ,N Guangdong, 2-VII-2000; 1 ♀, Cheng Jia , N Guangdong, 5-VII-2000. Holotype will be deposited at Tai Lung Experimental Station , Agriculture , Fisheries and Conservation Department , Lin Tong Mei , Sheung Shui, Hong Kong SAR, China.

Etymology. — Named in honour of the late Chao Hsiu-fu.

Description. — A Calicnemia with bright red coloured abdomen and amber tinted wings.

MALE. — Pale labium. Labrum, base of mandibles, genae, shiny orange red. Frons and clypeus carmine red. Irregular transverse line across front of head covering base of frons and base of antennae ( Fig. 15 ). A pair of quadrate, carmine red spots above anten­

nae almost linked below central ocellus. Top of head matt black with elongate, yellow, tear­ -shaped postocular spots. Prothorax matt black with pale yellow lateral spots ( Fig. 16 ). Synthorax black with broad, bright orange red dorsal stripe. Sides of synthorax with a yellow stripe across metepisternum, covering the spiracle and lower metepimeron and metaposternum yellow ( Fig. 16 ). Legs pale reddish brown. Wings uniformly tinted rich amber. Pterostigma greyish-brown, braced at proxi­ mal comer and subtending two to three cells ( Fig. 21 ). Abdo­ men bright, blood red with seg­ ment 1 pale orange and segment 10 blackish at distal border. Caudal appendages as figured in Figures 19-20 with long superior appendages twice length of 10thabdominal segment. Inferior appendages slightly longer than segment 10 with prominent downward and inward pointing basal pegs. Penile organ with simple, short, broad, quadrate lobes as illustrated in Figures 17-18 . FEMALE. — As male with red and orange red pattern of frontal head replace with pale orange. Dorsal thoracic stripe is fine yellow. Abdomen is uniformly dull orange red apart from segment 1 which is pale yellow and dorsum of abdominal segments 8-10 which are coloured dark brown. Wings, like the male, are strongly tinted uniformly amber. Measurements (mm): ♂,abd. + app.31.5-33.0;hw.22.0-24.0; ♀ abd. + app.27.5-29.0,hw22.0-24.0. DIFFERENTIAL DIAGNOSIS. - LIEFTINCK (1984) divided all the members of Calicnemia into two main species groups according to the structure of their penile organs. Group I species possess a pair of recurved penile lobes ending in narrow, ribbon-like filaments whereas Group II species have a recurved penis with broadly expanded lobes. C. chaoi belongs to the latter group. Of the six Calicnemia species known from China and adjacent Vietnam four, comprising C. eximia (Selys), C. erythromelas (Selys) , C. imitans Lieftinck , and C. sinensis Lieftinck , have Group I penile organs. The remaining two species, C. miles (Laidlaw) , and C. uenoi Asahina have Group II penile organs. C. uenoi has a fine ventral peg and only the anterior half of the abdomen is coloured red ( ASAHINA, 1997). C. miles (Laidlaw) is undoubtedly the closest congener and apart from the unique amber wings of chaoi it is difficult to separate the two species. The apical tips of the penile lobes of chaoi are reflexed and subacute, almost squarish, whereas the apical lobes of miles are curved, but not reflexed, and sharply pointed (cf. ASAHINA, 1985: 4-5, figs 9-16).

Figures

Figs 15-21. Calicnemia chaoi sp. n., ♂: (15) head, frontal; (16) thorax, lateral; (17) penile organ, lateral; (18) penile organ, ventral; (19) caudal appendages, lateral; (20) caudal appendages, dorsal; (21) hindwing.