Drepanosticta jurzitzai Hämäläinen, 1999

Phan, Quoc Toan, Yokoi, Naoto, Makbun, Noppadon, Joshi, Shantanu, Subramanian, K. A., Ngo, Quoc Phu & Dow, Rory A., 2021, A review of the Drepanosticta carmichaeli-group, with the description of D. wildermuthi sp. nov. from the Central Highlands of Vietnam (Odonata: Zygoptera: Platystictidae), Zootaxa 5067 (2), pp. 187-210 : 199-201

publication ID	https://doi.org/ 10.11646/zootaxa.5067.2.2
DOI	https://doi.org/10.5281/zenodo.5698913
persistent identifier	https://treatment.plazi.org/id/03AA87DB-FF8E-FF9E-5599-C676FCA94E24
treatment provided by	Plazi
scientific name	Drepanosticta jurzitzai Hämäläinen, 1999
status

Treatment

Drepanosticta jurzitzai Hämäläinen, 1999 View in CoL

( Figures 6–7 View FIGURE 6 View FIGURE 7 )

Drepanosticta jurzitzai: Hämäläinen (1999) View in CoL : Original described based on male specimens from Chanthaburi Province, Thailand, Fig. 1 View FIGURE 1 (prothorax in dorsal view), Figs 2–3 View FIGURE 2 View FIGURE 3 (appendages in lateral and dorsal view); Hämäläinen & Pinratana (2000): Record of females from the Khao Soi Dao Wildlife Sanctuary, Chanthaburi Province, Thailand, p. 157.

Specimens examined. 1 ♂, 1 ♀, Krating waterfall (12.83811 N, 102.1221 E, altitude 78 m), Chantaburi, Thailand, 29.iv.2019, Noppadon Makbun leg. ( ZCDTU) GoogleMaps .

Notes. Hämäläinen (1999) stated that D. jurzitzai differs from D. brownelli , D. hongkongensis and D. vietnamica by its pale colored pterostigma. In the holotype of D. jurzitzai the pterostigma is indeed pale colored. However, in the specimens examined in this study, from the type location of D. jurzitzai , the pterostigma is dark. It appears that the color of the pterostigma is variable (probably related to maturity) in D. jurzitzai and is therefore not a reliable diagnostic character. The anal appendages of the male of D. juritzai ( Fig. 7b–d View FIGURE 7 ) are very similar to those of D. brownelli ( Fig. 2c–e View FIGURE 2 ) and D. hongkongensis ( Wilson 1997: Fig. 21) except that the subbasal spur on the paraprocts is only variably present, it also shares pale dorsal markings on each of S8–10 with these species. It can easily be separated from D. carmichaeli by the lack of antehumeral stripes or a pale band across the dorsum of the head ( Fig. 6a View FIGURE 6 ) and from all of the remaining species in the D. carmichaeli- group based on the form of the cerci in lateral view ( Fig. 7c View FIGURE 7 ). At least among the species occurring in mainland Southeast Asia, a pale stripe on the metepisternum that is connected to the metakatepisternum (see Fig. 6a View FIGURE 6 ) is shared only with D. wildermuthi sp. nov. ( Fig. 10a View FIGURE 10 ), and this character will serve to distinguish it from D. brownelli and D. hongkongensis in which either no pale mark is present on the metepisternum or only a small mark disconnected from the metakatepisternum is present. Additionally, the genital ligula of D. jurzitzai ( Fig. 7e View FIGURE 7 ) appears to have a broader terminal segment with the arms more expanded apically than in either D. brownelli or D. hongkongensis (compare with the figures in Wilson 1997).

First description of the female. Head ( Fig. 6e–f View FIGURE 6 ). Basal half labrum black, anterior half labrum, anteclypeus, mandible and genae whitish-blue. Postclypeus and frons shining black. Antenna dark brown except the second segment which is dark yellowish. Vertex and occiput entirely black. Ocelli pale orange-brown.

Thorax. Prothorax. Anterior pronotal lobe largely yellowish; middle and posterior pronotal lobe yellowish with a large oval pale yellow marking dorsally on the middle pronotal lobe ( Fig. 6e View FIGURE 6 ); posterior pronotal lobe well developed, posterior margin slightly curved upward in lateral view ( Fig. 6g View FIGURE 6 ), slightly produced to rear at corners in dorsal view ( Fig. 6h View FIGURE 6 ). Propleuron entirely black. Synthorax ( Fig. 6e View FIGURE 6 ). Mesepisternum black with long yellowish antehumeral stripes, broad at base, narrower posteriorly; mesepimeron entirely black. Metepisternum black with a yellowish stripe, covering the spiracle and connected to metakatepisternum. Metepimeron black with a blue mark in the upper corner near the wing bases, lower half yellow. Legs ( Fig. 6e View FIGURE 6 ). Coxa and trochanter entirely yellow; femur yellow, flexor and extensor surfaces brownish; tibia black; tarsus and claws dark yellow. Wings hyaline, 16–17 Px in both wings. Pterostigma dark reddish, covering one underlying cell ( Fig. 7h View FIGURE 7 ).

Abdomen. S1–2 brown, ventrally yellowish; S3 mostly brown, anterior margin yellowish; S4–6 dark brown, broad pale basal annulus, black apically. S7 black dorsally and ventrally, with a large white spot basally; S8 black dorsally with large yellow lateral-basal spot; S9 dark reddish brown, apical 1/3 with blue dorso-lateral marking, posterior margin black; basal half of S10 blue, apical half whitish, the sides dark reddish brown ( Fig. 7f–g View FIGURE 7 ). Anal appendages. Cerci same length as S10, dark yellowish. Ovipositor mostly dark brown basally and black apically ( Fig. 7f–g View FIGURE 7 ).

Measurements (in mm). Abdomen with anal appendages 34, Hindwings 26.

Distribution. Thailand (Chanthaburi Province) ( Fig. 13 View FIGURE 13 ).