Tuberculobasis macuxi, 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 : 24

Tuberculobasis macuxi sp. nov.

Figures 45–46 , 69–71

Etymology: The name refers to the Macuxi indian people, who are settled in the region where the holotype was collected.

Type specimens: Holotype (3): BRAZIL, Roraima State, Maracá Ecological Station, Maracá Island (3º25´N, 61º36´W), 24-II-1988. P.A.R. Machado leg (within forest, away from water) ( ABMM).

Description. Male holotype.

Head. Labium yellowish white. Labrum and anteclypeus yellow; genae and base of mandibles grey; postclypeus, antefrons, and top of head brown; postocular lobe yellowish ochre. A subtriangular blue postocular spot adjacent to eye. Rear of head yellowish white.

Thorax. Prothorax: Pronotum yellow ochre with bluish markings on anterior lobe. Propleuron yellowish with greyish areas. Pterothorax: mesopleuron and metepisternum yellow ochre with a narrow light blue stripe at middle part of mesepisternum and at anterior part of metepisternum. Metepimeron yellowish white. Legs yellowish white, wings hyaline, venation brown. Pterostigma yellow. Px in FW 11, in HW 10. R3 originating between Px 5 and 6 in both wings. Petiolation distal to Ac by a distance equal or twice as long as length of Ac in both wings.

Abdomen. S1–2 dorsally yellow ochre, laterally light blue, ventrally yellowish white with a dark brown terminal line. S3–7 light brown dorsally, laterally yellow with a dark brown distal ring. S8–10, cercus, and paraproct light brown.

Structural characters. Hind prothoracic lobe with well-developed lateral lobes ( Fig. 45 ). Median lobe semicircular and two-lipped; ventral lip more produced than dorsal lip. Mesepisternal tubercles ( Figs 45, 46 ) subcylindrical, high (1.51 mm), directed dorsally, with bases well separated from mid-dorsal carina. Cercus about 1/2 shorter than paraproct ( Figs. 69–70 ), ventral process in lateral view tapering into a chitinized tip directed latero-posteriorly ( Fig. 71 ). Penis as described for genus (as in Fig. 89 ).

Dimensions (mm). Abdomen 21.9; HW 15.35

Remarks. T. macuxi has high mesepisternal tubercles with bases well separated from mid-dorsal carina, long paraprocts, and hind prothoracic lobe with well-developed lateral lobes. This combination makes it unique within the genus belonging to none of the two species groups recognized here.

Female. Unknown.

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].