Pseudagrion buenafei Müller, 1996

Pseudagrion buenafei Müller, 1996 View in CoL

Figures: 15–16 ( holotype ♂, envelope); 80 (head ♂); 97 (pterothorax ♂); 114a, b (abdomen ♂); 131a–c (caudal appendages ♂).

Pseudagrion buenafei View in CoL : Müller (1996): 377 –379, Figs 1–3 View FIGURES 1–3 (description ♂ ♀; ♂ appendages; Mindanao, Philippines);— Hämäläinen & Müller (1997): 261 (Mindanao).

Examined specimens from the type series ( 4♂♂)

♂ holotype, x.1991, Atongan River , Katanglad Mountains, Bukidnon, Mindanao, Philippines, Alex Buenafe leg., ex. Coll. Roland A. Müller, RMNH, JvT no. 17838 ( Figs 15–16 View FIGURES 15–16 ) ;— 1♂ paratype, 24./ 25.xi.1991, Muntian creek , Mt. Kalatungan , Olayan , Mabadiang, Bukidnon, Mindanao, Philippines, 1200–1400 m a.s.l., Alex Buenafe leg., ex. Coll. Roland A. Müller, RMNH, no. 1506118 ;— 1♂ paratype, ix.1995, Babang creek , Lake Agko , Ilomavis , Mt. Apo, North Cotabato, Mindanao, Philippines, 1600–1700 m a.s.l., Alex Buenafe leg., ex. Coll. Roland A. Müller, RMNH, no. 1506120 ;— 1♂ paratype, 24.xi.1995, Mansabilan creek , Mt. Kalatungan , Dumatap , Mebadiang, Bukidnon, Mindanao, Philippines, 1000–1300 m a.s.l., Alex Buenafe leg., ex. Coll. Roland A. Müller, RMNH, no. 1506121 .

Müller (1996) stated that the holotype should be deposited at SMF, but Hämäläinen (2017) corrected that statement: the holotype was deposited at RMNH.

Other specimens examined ( 1♂)

Philippines, Mindanao Island: 1♂, x.1991, Atongan River, Katanglad Mountains , Bukidnon, Alex Buenafe leg., ex. Coll. Roland A. Müller, RMNH, no. 1506113 .

Characterization of male

Head ( Figs 15 View FIGURES 15–16 , 80 View FIGURES 79–95 ): Labrum reddish brown to obscure blackish; anteclypeus red; postclypeus black; antefrons black, with anterior margin and laterally red; postfrons and vertex black; postocular spots and occipital bar red; rear of head black, but a pale patch along the centre of the eye margins; base and scape of antennae black, following segments brownish.

Thorax ( Figs 15 View FIGURES 15–16 , 97 View FIGURES 96–112 ): Pronotum with anterior lobe black, its posterior centre reddish, extending towards middle lobe; middle pronotal lobe otherwise black, with a centrally divided reddish rectangular patch in the middle, and on each side a large reddish patch dorsolaterally; propleuron black above, broadly reddish below and to rear; posterior lobe of pronotum blackish, with reddish centre; apical edge of posterior lobe convex. Pterothorax dorsally black, with antehumeral stripe red (may be interrupted); laterally red, with a black stripe each at posterior quarter of interpleural and metapleural suture, interpleural suture with a black spot anterior of the black stripe; ventrally pale, may be covered with whitish pruinosity. Legs blackish, with coxae and trochanters reddish.

Abdomen ( Figs 15 View FIGURES 15–16 , 114a, b View FIGURES 113–122 ): S1 red; S2 red with a small black triangle marking dorsally at posterior end; S3–7 dorsally black, laterally reddish; S8–10 red with black apical ring.

Caudal appendages ( Figs 131a–c View FIGURES 130–139 ): Cercus blackish; slightly shorter than S10; in lateral view subrectangular, inter-lobe notch placed low on apex; in dorsal view cercus narrow, with apex of superior lobe of cercus curved inward (more clearly so in dorsolateral view); an inward directed projection is situated at just after half-length on the superior lobe of the cercus; a small subbasal interior projection on inferior lobe of cercus, visible in dorsal and dorsolateral views, this bulge-like projection bearing a sharp proximal edge; paraproct reddish, around half as long as cercus, in lateral view somewhat triangular and tapered, with rounded apex; in dorsal view broadly rounded, concave bowl-like, with small black tooth at medial edge.

Wings with 14.5–17.5 px in forewing, and 14.5–15.5 px in hindwing.

Measurements (mm): Total length (with appendages) 46.3–49.0; abdomen length (without appendages) 37.5– 39.4; hindwing 26.4–30.0; forewing 27.7–30.0; Pt in forewing 0.7–0.8; male cercus 0.7.

Characterization of female [not examined, characterization adopted from Müller (1996)]

Head: As in male, but with a black triangular mark at frons.

Thorax: Pronotum and pterothorax as in male, but red replaced by greenish-yellow; legs as in the male.

Abdomen: S1 reddish-brown; S2 reddish-brown, with narrow black middorsal marking, widened apically; S3– 10 dorsally black, laterally reddish-brown.

Diagnosis

Both sexes of this species are separated from congeneric species, and especially the co-occurring P. pilidorsum , by the morphology of the male cercus (compare Figs 131a–c View FIGURES 130–139 , 143a–c View FIGURES 140–146 ), as well as by the combination of a largely black frons and vertex (compare Figs 80, 92 View FIGURES 79–95 ), a black humeral stripe (compare Figs 97, 109 View FIGURES 96–112 ), and blackish legs (compare Figs 15 View FIGURES 15–16 , 63, 64 View FIGURES 63–65 , 165 View FIGURES 163–170 ). Pseudagrion buenafei is also larger (total length 46–49 mm) than P. pilidorsum ( 38–46 mm). Additionally, the male is separated from all congeners by the almost entirely red abdominal segment S8 ( Figs 15 View FIGURES 15–16 , 114a, b View FIGURES 113–122 ).

Distribution

Endemic to Mindanao, Philippines ( Fig. 2 View FIGURES 1–3 ).