Coeliccia KazuKoae Asahina, 1984

Kosterin, Oleg E. & Kompier, Tom, 2017, Coeliccia rolandorum sp. nov. from eastern Cambodia and southern Vietnam, the eastern relative of C. kazukoae Asahina, 1984 (Odonata: Platycnemididae), Zootaxa 4341 (4), pp. 509-527 : 511-514

Coeliccia KazuKoae Asahina, 1984

( Figs 1–4 , 5f–j , 10d–f )

SeleCted referenCes:

Coeliccia sp.— Asahina 1967: 210 –211, Figs 5–6 —report and short desCription of the future holotype male of C. kazukoae from Chékô, Cambodia.

Coeliccia megumii sp. nov. — Asahina 1984: 15 –16, Fig. 53–56—original desCription, drawings of the head and pterothorax, end of abdomen, ligula terminal part (male).

Coeliccia kazukoae sp. nov. — Asahina 1984: 16 –17, Figs 57–62—original desCription, drawings of the head and pterothorax, end of abdomen (male and female), female prothorax.

Coeliccia kazukoae Asahina, 1984 — Hämäläinen & Pinratana 1999: 54, map—presenCe in Nakhon Nayok, Chanthaburi and Trat ProVinCes of Thailand.

Coeliccia megumii Asahina, 1984 — Hämäläinen & Pinratana 1999: 55, map—presenCe in Chanthaburi ProVinCe of Thailand.

Coeliccia kazukoae Asahina, 1984 — Kosterin & VikhreV 2008: 233, CoVer photo—report for Khao KhitChakut National Park, Chanthaburi ProVinCe, Thailand, photo of a male in nature.

Coeliccia kazukoae Asahina, 1984 — Kosterin 2010: 20, 53–55, 62–63, Figs 11, 42—report for three loCalities in Koh Kong ProVinCe and one in Kampong Saom ProVinCe of Cambodia; photos in nature and of male speCimen details, disCussion of Variation in Colour pattern towards that of C. megumii .

Coeliccia megumii Asahina, 1984 —Kosterin et al. 2011: 16—the seCond report for Khao KhitChakut National Park, Thailand.

Coeliccia kazukoae Asahina, 1984 —Kosterin 2011: 78, 81, 97–99, Fig. 77—synonymy with C. megumii Asahina, 1984 , seleCtion of C. kazukoae as the Valid name by the First ReViser, report for three loCalities (two new) in Koh Kong ProVinCe of Cambodia; photos of details of male speCimens.

Coeliccia kazukoae Asahina, 1984 —Kosterin 2012: 27, 31, 32, 34, 75–76, Fig. 47—reCorded at four (two new) loCalities in Koh Kong ProVinCe; the first photo of a mature female (in tandem with a mature male).

Coeliccia kazukoae (= C. megumii )—Day et al. 2012: 19, 24—report from Khao Yai National Park, Nakhon RatChasima ProVinCe and Pang Sida National Park, Sra Kaeu ProViCe of Thailand.

Coeliccia kazukoae Asahina, 1984 — Steinhoff & Do 2013: 350, Fig. 2 —report from Trat ProVinCe of Thailand (Klong Sai near Bo Rai, Khao Saming Amphoe), disCussion of CharaCters.

Coeliccia kazukoae Asahina, 1984 — Kosterin 2014: 8 —seCond reports from two loCalities in Koh Kong ProVinCe.

Coeliccia kazukoae — Kosterin 2015: 7, 22–23, Fig. 15—the first report for Koh Rong Island , Cambodia ; reports for the southern Coastal stripe of Trat ProVinCe of Thailand; photo of an immature male.

Coeliccia kazukoae Asahina, 1984 — Ngiam & ArtChawakom 2015: 58 —report from Khao Sunt forest at Sakaerat ResearCh Station, Nakhon RatChasima ProVinCe of Thailand.

Specimens examined. Thailand: 1 ♂, 1 ♀ (immature), Chanthaburi Province , Khao Khitchakut, Krating Waterfall, 6 i 2006, O.K. leg.; 1 ♂, 1 ♀ (immature), Trat Province , Laem Klat env., a half-dry rivulet entering the sea at Sentara Resort, 11°59'44–50'' N 102°46'20–29'' E, 16–18 m a.s.l., 17 iii 2015, O.K. leg. Cambodia: 1 mature ♂, Koh Kong Province, 27 km NNW of Koh Kong, ‘Gynacantha’ brook, 11°49'47–48’’ N, 102°53'38–41’’ E, 27 viii 2011, O.K. leg.; 1 half-mature ♂ , Koh Kong Province , Koh Por Waterfalls area (locality now destroyed), 11°43'11''–44'58'' N, 103°04'28''–05'09'' E, 11–20 m a.s.l., 14 iv 2010, O.K. leg.; 3 mature ♂ ( Fig. 5g, i–j ), 1 immature ♀ ( Fig. 10f ), the same locality, 1 xii 2010, O.K. leg.; 2 immature ♀, Koh Kong Province, ‘Poacher river’ at W bank of Stung Koh-Kong. 11°38'41–55'' N, 103°00'10–58'' E, 30 xi 2010, O.K. leg.; 1 immature ♂ , Koh Kong Province , Tatai Commune, a stony temporary ‘Oculata brook’ at Phum Doung Bridge, 11°33'46–50'' N, 103°07'23– 29'' E, 30–100 m a.s.l., 18 iv 2011, O.K. leg.; 2 mature ♂, the same locality, 26 viii 2011, O.K. leg.; 3 mature ♂ ( Fig. 5f, h ), Koh Kong Province, 0.8 km S of Tatai Waterfall, ‘Rhinagrion brook’, 11°34'52'' N, 103°05'37'' E, 80 m a.s. l., 2 xii 2010, O.K. leg.; 1 immature ♀ , Koh Kong Province, 21 km ENE Koh-Kong, a small ‘Kazukoae brook’ in a dense secondary, mostly bamboo, forest, 11°41'27–32' N, 103°09’25’’ E, 280–300 m a.s. l., 23 v 2013, O.K. leg.; 1 mature ♂ , Koh Kong Province, ‘ Viola veal’, 11°35'00–31'' N, 103°13'39–14'17'' E, 339–380 m a.s. l., 12 viii 2011, O.K. leg.; 1 immature ♂, Kampongsaom ( presently Preah Sihanouk) Province , Ream recreation centre at the pagoda, a brook (no more existing), 10°30'57'' N, 103°37'02'' E, 34–44 m a.s.l., 20 iv 2010, O.K. leg.; 2 ♂, 1 ♀ (immature), Preah Sihanouk Province, Koh Rong Island, a rivulet at SW bank, 10°39'38–39'' N 103°16'14–20'' E, 55–20 m a.s. l., 28 iii 2015, O.K. leg . Vietnam: 1 ♂, 1 ♀ (immature), Kiên Giang Province, Phú Quốc Island, 10.251 N 104.029 E, 1 i 2016, T.K. leg.

Characters. The original description of C. kazukoae refers to colouration of immature individuals of both sexes ( Asahina 1984).

Immature males ( Fig. 1a ) have the dark elements of the colouration brown rather than black, while the pale elements are at first creamy- and later bluish-white. The dark dorsal part of the synthorax has a very peculiar stripy appearance. Its ground colour is pale brown. There is a darker brown stripe going over the middorsal suture, which in turn is bordered by a pair of pale stripes with a diffuse lower margin. A distinct pale streak, of the same colour as the lower part of the synthorax, goes along the mesepisternum, accompanied by a blackish streak at its dorsal side and a darker brown diffuse border at its ventral side. A next pale streak covers the mesopleural suture; it is narrow and diffuse, but its posterior end is expanded and distinct and is bordered by a blackish stroke at its dorsal side . The ventral border of the synthorax dark part at the mesepimeron, except for its anterior part, is bordered by another blackish streak. The upper part of the head is light brown with irregular blackish stripes, one in front of antennae, the second between the antennae and the central ocellus, broadest behind the lateral ocelli, and there is a pair of lateral darker areas along the compound eyes and a pair of distinct light-bluish occipital stripes.

Submature males ( Fig. 3 ): The diffuse pale stripes over the middorsal and mesopleural sutures darken and fade, while the pair of distinct mesepisternal streaks and the distinct posterior part of the mesepimeral streak become contrasted bright-bluish ( Fig. 5f ). The blackish elements on the top of the head merge with each other, leaving irregular and interrupted brownish stripes between the lateral ocelli and compound eyes and spots around the central ocellus ( Fig. 5h ).

Fully mature males ( Figs 1b , 2 , 5g , i–j) correspond to the original description of C. megumii ( Asahina 1984) . The synthorax has become distinctly bicolored, bright azure blue and saturated black, its dorsal side black with only a pair of distinct blue mesepisternal streaks ( Fig. 5g ). The pair of dorsal brownish spots on the prothorax disappears but the anterior lobe remains largely brownish ( Fig. 5j ). The top of the head has become black with only a pair of narrow brownish streaks between the lateral ocelli and compound eyes and some vestigial spots at the central ocellus, while the occipital streaks are bright blue ( Fig. 5g ).

Females exhibit a similar change of colouration while ageing, but the colouration of immature individuals is usually of a more yellow hue, while the darkening of the dark pattern elements in mature females is not as complete as in males. Therefore, the diffuse brownish stripes can still be seen on the dorsal side of the synthorax along with the pair of distinct blue streaks ( Fig. 2 ).

Occurrence and seasonality. Immature stages are encountered more frequently than completely mature individuals. It is still unclear if the species has some regular seasonality. Hämäläinen & Pinratana (1999) summarised the occurrence of C. kazukoae (thus of immature specimens) as September–January and that of C. megumii (mature specimens of C. kazukoae ) as May–October. In Cambodia O.K. observed mature individuals in December and August and immature individuals in March and April. In Phú Quốc immature specimens of the species were recorded by T.K. in January and April.

Distribution. The Sankamphaeng Mountains in eastern Thailand and the entire Cardamonean region, which includes the Cardamom Mountains, extending from the eastern Thailand to south-western Cambodia, and the adjacent islands including Phú Quốc ( Fig. 6 ). The species is known from Nakhon Nayok, Nakhon Ratchasima, Sra Kaeu, Chanthaburi, and Trat Provinces of Thailand, from Koh Kong and Preah Sihanouk Provinces of Cambodia, and from the islands of Koh Rong ( Cambodia) and Phú Quốc ( Vietnam).

The species has not been recorded from Pursat and Kampot Provinces of Cambodia and the islands of Ko Chang, Ko Kut ( Thailand) , Koh Kong and Koh Rong Samloem ( Cambodia) but , as can be inferred from the known distribution and biogeographical considerations, is expected to occur there as well .

Habitat. Coliccia kazukoae inhabits lowland evergreen tropical forests, where it occurs at small rivers and brooks (including those disappearing in the dry season) which flow in shady, often rocky valleys and ravines (see Kosterin 2010: Fig. 21; Kosterin 2011: Fig. 32), or at seepages in the major river valleys (see Kosterin 2010: Fig. 10 ). In Phu Quoc the species was observed in the forest away from stream valleys (dried up in the dry season), perching on twigs and herbs.

Figures

FIGURE 1. Males of Coeliccia kazukoae: a—an immature one Corresponding to the original desCription of C. kazukoae (Asahina 1984), Thailand, Chanthaburi ProVinCe, Krating Waterfall, 6 i 2006; b—mature one Corresponding to the original desCription of C. megumii (Asahina 1984), Cambodia, Koh Kong ProVinCe, 12 km ENE of Tatai Village, ‘ Viola Veal’, 12 Viii 2011. Photos by O. K.

FIGURE 2. A tandem of fully mature male and female of Coeliccia kazukoae, Cambodia, Koh Kong ProVinCe, ‘ GynaCantha brook’ at Thma Dar loCality, Koh Kong ProVinCe, Cambodia, 27 Viii 2011. From Kosterin (2012: Fig 47). Photo by O. K.

FIGURE 3. Submature males of Coeliccia kazukoae from Cambodia at the stages of maturity intermediate between those desCribed as C. kazukoae (immature) and C. megumii (mature), in nature (left) and ColleCtion (heads; right), of whiCh (b) is the less and (a) the more mature Condition; a—Koh Kong ProVinCe, Koh Por Waterfalls, 13 iV 2010; b—Koh Kong ProVinCe, a dry temporary ‘ OCulata brook’ Valley at Phum Doung Bridge, 18 iV 2010; C—Kampong Saom ProVinCe, Ream ReCreation Centre at the pagoda, 20 iV 2010 (in this Case different males in nature and in ColleCtion). From Kosterin (2010: Fig. 42). Not to sCale.

FIGURE 4. Anal appendages in lateral View of Coeliccia kazukoae: a – d—mature males from Koh Kong ProVinCe of Cambodia; a, C – d—at Koh Por Waterfalls, 1 xii 2010; b— ‘ Rhinagrion brook’ at Tatai Waterfalls, 2 xii 2010 (from Kosterin 2011: Fig. 77); e—the holotypes of C. kazukoe from Asahina (1984: Fig. 58); f—the holotype of C. megumii from Asahina (1984: Fig. 54). Not to sCale.

FIGURE 5. Comparison of male CharaCters of Coeliccia rolandorum (a – e; a, C – e—holotype; b—a paratype from Seima Forest) and C. kazukoae (f – j; f, h—submature male, with stripes along mesostigmal sutures still Visible, from Cambodia, ‘ Rhinagrion brook’, 2 xii 2010; g, i – j—mature male from Cambodia, Koh Por Waterfall, 1 xii 2010). a – b, f – g—head and thorax, lateral View; C, h—head, dorsal View; d, i—prothorax, lateral View; e, j—prothorax, dorsal View. SCale bar 1 mm.

FIGURE 6. GeographiCal distribution of Coeliccia kazukoae (pink signs) and C. rolandorum (orange signs) in Thailand and IndoChina. The stars denote the type loCalities of these two speCies, the square denotes the type loCality of C. megumii (synonym of C. kazukoae), the CirCles stand for other known loCalities. For the sourCe of information see referenCes and materials in the text. The map base is taken from Google Earth.

FIGURE 10. Comparison of female prothorax and mesostigmal plate of Coeliccia rolandorum (a – C) and C. kazukoae (d – f); a – b, d – e—sChematiC sketChes; C, f—photos of the immature paratype of C. rolandorum from Dak Dam Village enV. (C) and an immature female from Cambodia, Koh Por Waterfall, 1 xii 2010 (f); a, b—dorsal View; b – C, e – f—lateral View; ph—prothoraCiC horn; lap. — lapels. SCale bar 0.5 mm.