Coeliccia lephuocdieui, Phan & Ngo & Bui, 2020

Phan, Quoc Toan, Ngo, Quoc Phu & Bui, Anh Phong, 2020, Description of Coeliccia lephuocdieui sp. nov. from the Central Highlands of Vietnam (Odonata: Zygoptera: Platycnemididae) with notes on its congeners, Zootaxa 4786 (1), pp. 69-80 : 70-74

publication ID	https://doi.org/ 10.11646/zootaxa.4786.1.5
publication LSID	lsid:zoobank.org:pub:30700879-7F5C-4FB8-AE82-ECB1B489280A
DOI	https://doi.org/10.5281/zenodo.3866590
persistent identifier	https://treatment.plazi.org/id/1AB7FD22-B20C-4F04-8127-DCF12122F2A9
taxon LSID	lsid:zoobank.org:act:1AB7FD22-B20C-4F04-8127-DCF12122F2A9
treatment provided by	Plazi
scientific name	Coeliccia lephuocdieui
status	sp. nov.

Treatment

Coeliccia lephuocdieui View in CoL sp. nov.

( Figures 1 View FIGURE 1 , 2a View FIGURE 2 , 3 View FIGURE 3 a–b, 4a–b, 5, 6a–b, 8a)

Type material. Holotype: ♂, a fully mature male, mountain top near the headquarters of the Kon Ka Kinh NP (14.2586N, 108.3786E; altitude 1489 m), Ayun Commune, Mang Yang District , Gia Lai Prov., 21 iv 2019, Q. T. Phan & Q.P. Ngo leg. GoogleMaps

Paratypes: 3 ♂♂, 3 ♀♀, all mature, same data as holotype GoogleMaps ; 1 ♂, fully mature, same location as holotype, 04 iv 2018, To Van Quang leg. GoogleMaps

Type deposition. All type specimens of the new species are deposited in the Zoological Collection of Duy Tan University , Da Nang, Vietnam .

Etymology. The species is named lephuocdieui in memory of our friend, Mr Le Phuoc Dieu (born December 07, 1984, deceased May 24, 2019) of Quang Tri Province, Vietnam. A noun in the genitive case.

Description of holotype. Head ( Figs 2a View FIGURE 2 , 5c View FIGURE 5 ). Labrum, anteclypeus, postclypeus, genae and mandibles shining black; front of head and antennae matte black except for top of first segment dark yellowish. Dorsum of head matte black excluding two narrow stripes adjacent to posterior ocelli and two oval yellowish postocular spots. Compound eyes bicoloured in life, black above and green below ( Fig. 8a View FIGURE 8 ).

Thorax ( Fig. 2a View FIGURE 2 ). Prothorax: black apart from dark yellow marking on middle pronotal lobe. Synthorax: mesepisternum and mesepimeron entirely black; metepisternum and metepimeron with two distinct large yellow markings as in Figure 2a View FIGURE 2 (pattern greenish-yellow in living individual, Fig. 8a View FIGURE 8 ). Mesinfraepisternum and metinfraepisternum entirely black. Legs ( Fig. 2a View FIGURE 2 ). Coxae and trochanters black with dark yellowish marking. Femur and tibia pale yellowish with black lines. Spines and claws black.

Wings. Hyaline, 18 px in FW and 17 in HW. Pt brown, covering 2 underlying cells.

Abdomen ( Figs 1a View FIGURE 1 , 3 View FIGURE 3 a–b). S1 largely whitish, black dorsally; S2–6 black dorsally, whitish ventrally with subapical white annulus from S3–6; S8–9 largely black, ventral margin with yellowish stripe; S10 black dorsally ( Fig. 3a View FIGURE 3 ), lateral and ventral yellowish ( Fig. 3b View FIGURE 3 ).

Anal appendages ( Fig. 3 View FIGURE 3 a–b) yellowish apart from black ventral margin of cerci and tip of paraprocts. Cerci as long as S10, ventral side with blackish carina, forming a point. Paraprocts slightly longer than cerci, gently rising with tip curved medially and ending in a black tooth. In dorsal view ( Fig. 3a View FIGURE 3 ), cerci yellowish, apex smoothly rounded but in lateral view ( Fig. 3b View FIGURE 3 ), cerci expanding near base, tip acute.

Genital ligula ( Fig. 4 View FIGURE 4 a–b) bifurcate distally with a pair of long flagella. Terminal segment with a large triangular-shaped flap distally and thin apical fold.

Measurements (in mm). HW 30; abdomen including appendages 46.

Variation in paratype males. One male smaller: HW 28 mm, abdomen including appendages 42 mm, but higher number of px, 21 in FW and 20 in HW. In another paratype male, prothorax entirely black, not dark yellowish as in holotype and HW 29 mm, abdomen including appendages 43 mm. The other paratype male with HW 30 mm, abdomen including appendages 48 mm, the number of px as in holotype.

Description of female. Head ( Fig. 5 View FIGURE 5 a–b). Labrum and postclypeus entirely shining black. Anteclypeus yellow with two black spots left and right on lower margin. Mandibles and genae yellow, this pattern connecting above with postclypeus. Head dorsally matte black with two long yellow stripes each extending from eye margin to posterior ocellus, two oval yellow spots adjacent the anterior ocellus and two oblong yellowish postocular spots. Antennae black, top of first segment yellow. Compound eyes in life as in the male ( Fig. 8a View FIGURE 8 ), black dorsally and greenish below.

Thorax ( Figs 5a, 5d View FIGURE 5 , 6 View FIGURE 6 a–b). Prothorax: Anterior, posterior and dorsal of middle pronotal lobes black, remaining area yellowish ( Fig. 5a, d View FIGURE 5 ). Posterior margin of posterior pronotal lobe slightly convex in lateral view ( Fig. 6a View FIGURE 6 ), triangular-shaped in dorsal view ( Fig. 6b View FIGURE 6 ) and with two distinct lapels. Synthorax ( Fig. 5a View FIGURE 5 ): mesepisternum with a long, narrow yellowish antehumeral stripe; mesepimeron entirely black; metepisternum and metepimeron mostly yellow except for narrow metepleural black stripe along lower margin of metepisternum. Mesinfraepisternum and metinfraepisternum entirely yellow. Legs as in the male.

Wings. Hyaline, 19 px in FW and 18 in HW. Pt brown, covering 1.5 underlying cells.

Abdomen ( Figs 2b View FIGURE 2 , 5e View FIGURE 5 ). S1 largely yellow with posterior margin and dorsum narrowly black; dorsal half S2 black, yellow ventrally; S3–7 dark brownish dorsally, ventral margin yellowish with subapical yellow annulus; S8 black with an oval yellowish spot laterally, lower margin with yellow stripe; S9–10 mostly yellowish, ventral and posterior margin black ( Fig. 5e View FIGURE 5 ).

Anal appendages ( Fig. 5e View FIGURE 5 ). Cerci black, half S10; ovipositor black with yellow anterior marking dorsally at apex.

Measurements (in mm). Hind wing 30; abdomen including appendages 43.

Variation in paratype females. Paratype females show no significant morphological differences from female used for the description apart from size, ranging from 30–31 mm (HW), 41–44 mm (abdomen including appendages) and px 19–21 in FW and 18–20 in HW.

Habitat and ecology. Adults were collected at a dry narrow, densely vegetated stream within a humid, pristine forest ( Fig. 9 View FIGURE 9 a–b).

Differential Diagnosis. Within Coeliccia , the new species and C. scutellum , C. hainanense Laidlaw, 1932 , C. renifera (Selys, 1886) , C. svihleri Asahina, 1970 and C. yamasakii can be defined as a group characterized by the combination of following male characters: synthorax with three separated large yellowish (sometimes greenish) markings (apart from C. lephuocdieui ), genital ligula with two thin apico-lateral flagella and abdominal tip (excluding C. lephuocdieui and C. renifera ) including appendages yellowish ( Asahina 1970, 1984, 1985; Steinhoff & Uhl 2015). Coeliccia lephuocdieui differs from all of the above species by lacking the dorsal yellow marking on its synthorax ( Fig. 1a View FIGURE 1 ) and combination of the morphological differences in the male appendages and female prothoracic structures. The following comparisons are based on the new species and two Vietnamese species C. scutellum and C. yamasakii apart from C. hainanense which we were not examined. Male of C. lephuocdieui can be easily separated from both C. scutellum and C. yamasakii by following characters: lacking the large oval yellow antehumeral stripe ( Fig. 1a View FIGURE 1 ); dorsal S10 of C. lephuocdieui black, yellowish latero-ventrally ( Fig. 3 View FIGURE 3 a–b) whereas dorsal (in C. yamasakii ) or all (in C. scutellum ) S10 yellowish ( Fig. 3 View FIGURE 3 c–f); cerci of C. lephuocdieui as long as S10, black ventrally, expanding basally, tip acute in lateral view ( Fig. 3b View FIGURE 3 ) while cerci of C. scutellum clearly longer than S10, entirely yellowish with tip smoothly rounded ( Fig. 3 View FIGURE 3 c–d). The new species differs from C. yamasakii by several differential characters: genae and the pattern between eye margin and antennae entirely black ( Fig. 5c View FIGURE 5 ) but blue in C. yamasakii ( Fig. 7b View FIGURE 7 ); male synthorax lacking oval spots and the yellow pattern covering most of metepimeron ( Fig. 2a View FIGURE 2 ) but these spots present in C. yamasakii and yellow pattern covering about posterior 1/3rd of metepimeron ( Fig. 7a View FIGURE 7 ); genital ligula with the widely apical flap ( Fig. 4 View FIGURE 4 a–b) whereas in C. yamasakii , apical portion of terminal segment strongly prominent ( Fig. 4 View FIGURE 4 c–d); paraprocts yellowish ( Fig. 3b View FIGURE 3 ) but dark brownish in C. yamasakii ( Fig. 3f View FIGURE 3 ). In the female, posterior pronotal lobe of prothorax of C. lephuocdieui well developed ( Fig. 6 View FIGURE 6 a–b) but this structure much smaller in C. yamasakii ( Fig. 6 View FIGURE 6 e–f); S10 largely yellowish ( Fig. 5e View FIGURE 5 ) whereas S10 entirely black in C. yamasakii ( Fig. 7e View FIGURE 7 ).

General body colour of female of C. lephuocdieui same as in C. scutellum , but differs by structural differences of the posterior pronotal lobe of prothorax as follows: in lateral view, this structure is not strongly erect and elongat- ed as C. scutellum ( Fig. 6a, c View FIGURE 6 ); in dorsal view, posterior pronotal lobe of C. lephuocdieui broadly, triangular-shaped ( Fig. 6b View FIGURE 6 ) but it is narrower and parallel sided in C. scutellum ( Fig. 6d View FIGURE 6 ).

Remarks. Coeliccia lephuocdieui and C. scutellum occur at different elevations in the mountain areas of Ayun Commune of Gia Lai Province. The new species occurs at an approximate altitude of 1,500 m compared to about 800–1,000 m for C. scutellum .