Tuberculobasis guarani, 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 : 18-22

Tuberculobasis guarani sp. nov.

Figures 29–30 , 64–65

Etymology: The name refers to the Guarani indian people who still inhabit various areas of the State of São Paulo.

Type specimens: Holotype (3). BRAZIL, São Paulo State, Ibitinga (21º45´S, 48º49´W), Fazenda Itaguaré, 17-VI-1965, K. Lenko leg. ( ABMM).

Description.Male holotype.

Head. Labium whitish yellow; labrum dark green; antefrons and top of head dark brown with rounded pale postocular spots.

Thorax. Prothorax yellowish brown except for dark brown anterior lobe.

Thorax, pterothorax: mesopleuron brown; metapleuron yellowish. Poorly defined grey stripes at posterior part of mesepisternum and metepisternum. Legs yellowish, wings hyaline, venation and pterostigma brown, Px in FW 11, in HW 10. R3 arising near Px 5 in FW, near Px 4 in HW. Petiolation distal to Ac by a distance equal to Ac length in both wings.

Abdomen. S1–2 dorsally brownish yellow ventrally yellowish with a grey dorso-lateral stripe. S3–6 dorsally brown, laterally yellow, with a dark brown ring at distal 1/7. S70–10 yellowish orange.

Structural characters. Hind prothoracic lobe with very small lateral lobes ( Figs 29, 30 ), median lobe projecting caudally, semicircular, and two-lipped; both lips continuous ( Fig.29 ). Mesepisternal tubercles ( Figs 29, 30 ) very high (2.83 mm), conical, with the apex directed laterally and bases adjacent to mid-dorsal carina ( Fig. 29 ). Cercus 1/3 shorter than paraproct ( Fig. 64 ) in posterior view ( Fig. 65 ) with ventral process subtriangular. Penis as usual for the genus (as in Fig. 1 ).

Dimensions (mm). Abdomen 32.5; HW 19.8.

Female. Unknown.

Remarks. Tuberculobasis guarani has the highest mesepisternal tubercle within the genus ( Fig. 30 ). It belongs in the costalimai species group and it is close to T. arara . It shares with this species the presence of subtriangular short ventral process of cercus but can be separated from it by characters given in the key. Together with T. costalimai , T. guarani is the only Tuberculobasis so far reported from SE Brazil, and the first species of the genus recorded for the State of São Paulo.

Figures

FIGURE 1. Denticulobasis garrisoni, paratype: penis with distal segment raised [by R. W. Garrison].

FIGURES 25 – 34. Tuberculobasis, male thorax in dorsal and lateral view in T. arara, holotype (25, 26); T. costalimai, holotype (27, 28); T. guarani, holotype (29, 30); T. inversa, holotype (31, 32); T. williamsoni, holotype (33, 34).

FIGURES 57 – 65. Tuberculobasis, male appendages in dorsal, lateral, and posterior view: T. arara, holotype (57 – 59); T. costalimai, paratypes (60 – 62); T. guarani, holotype (64, 65), T. inversa holotype in dorsal (63), dorso-lateral (66), and lateral (68) views. T. inversa, Tefé, Amazonas State, in postero-lateral (68) view [66, 67 by R. W. Garrison].