Tuberculobasis geijskesi, Machado, Angelo B. M., 2009

Machado, Angelo B. M., 2009, Denticulobasis and Tuberculobasis, new genera close to Leptobasis, with description of ten new species (Odonata: Coenagrionidae)., Zootaxa 2108, pp. 1-36 : 18

Tuberculobasis geijskesi sp.nov.

Figures 35–36 , 75–77 , 90

Etymology: Named after the late Dr. Dirk Cornelis Geijskes, collector of the type specimen, in recognition for his enormous contribution to the knowledge of Neotropical Odonata .

Type specimens: Holotype (3). SURINAME, Republiek, Lelydorp (5º22´N, 57º30´W) 15-IV-1938, D.K. Geijskes leg. ( MNRJ).

Description. Male holotype.

Head. Labium yellow. Face green. Antefrons and top of head black with blue postocular spots. Traces of a yellow spot in front of postocular spot and a transverse yellow band behind it. Rear of head yellow.

Thorax. Prothorax: Anterior lobe dark metallic green, median and posterior lobes brown with areas metallic copper and gold. Pterothorax: mesepisternum metallic copper with an argentous longitudinal stripe surrounded by metallic gold. Mesepisternal tubercles and mesepimeron metallic gold. Metapleuron brown with two broad argentous stripes on metepisternum and metepimeron. Legs yellow, tarsi brownish, wings hyaline, venation and pterostigma yellow. Px in FW 11; in HW 10. R3 originating near Px 5 in FW and 4 in HW. Petiolation in FW distal to Ac by a distance equal to Ac length in FW and twice its length in HW.

Abdomen. S1–2 brown with a wide argentous lateral stripe. S3–7 missing, S9–10 reddish brown, cercus brown. Paraproct brown with apex dark.

Structural characters. Hind prothoracic lobe ( Figs 35, 36 ) with lateral lobes well-developed, median lobe projected posteriorly, semicircular, two-lipped; dorsal lip connected medially with ventral one by a small bridge ( Fig. 75 ). Mesepisternal tubercle ( Figs 35, 36 ) low (0.82 mm), in dorsal view elliptical. Hind margin of S10 slightly elevated ( Fig. 77 ). Cercus in lateral view ( Fig. 76 ) with a slender tapering curved ventral process ending in a small hook-like tip. Penis as described for genus, but filiform process extending beyond lateral border ( Fig. 90 ).

Dimensions (mm). HW 19.0

Female. Unknown

Remarks. This is the second species of Tuberculobasis recorded from Suriname after T. mammilaris ( BELLE, 2002). By its cercus subequal to paraproct, low and mammiliform mesepisternal tubercles with bases well separated from mid-dorsal carina, and well-developed lateral lobes on prothoracic hind margin, it belongs in T. mammilaris species group. It differs from the other four species of this group by characters given in the key. Thoracic color with metallic luster and S10 elevated dorso-distally are unique characters for this species.

Figures

FIGURES 35 – 46. Tuberculobasis, male thorax in dorsal and lateral view: T. geijskesi, holotype (35, 36); T. karitiana, holotype (37, 38); T. mammilaris, Venezuela (39, 40); T. tirio, holotype (41, 42); T. yanomami, paratype (43, 44); T. macuxi, holotype (45, 46).

FIGURES 69 – 77. Tuberculobasis male, anal appendages in dorsal, lateral, and posterior views: T. macuxi, holotype (69 – 71); T. williamsoni, holotype (72 – 74); T. geijskesi, holotype (75 – 77).

FIGURES 87 – 94. Penis in lateral and ectal views: D. dunklei, holotype (87); D. garrisoni, holotype (88); T. costalimai, paratype (89); T. geijskesi, holotype (90); T. mammilaris, lectotype (91); T. tirio, paratype (92); T. williamsoni, paratype (93); Leptobasis vacillans, Panamá (94) [91 by R. W. Garrison].