Tuberculobasis tirio, 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 : 27-29

Tuberculobasis tirio sp. nov.

Figures 41–42 , 51 , 81–83 , 92

Etymology: The name refers to the Tirio indian people, who helped the author’s collecting activities during his one- month visit to their village.

Type specimens: Holotype (3) and allotype (Ƥ): BRAZIL, Pará State, Tumucumaque Indian Park, two days walk east from the Tirió Indian village (temporary pool in savannah II-1963), Machado & Acewa leg. ( ABMM). Paratype (1 3) same data as holotype ( MNRJ).

Description. Male holotype.

Head. Labium yellowish white. Genae and base of mandibles dark brown. Labrum, anteclypeus, postclypeus, and antefrons black. Top of head black. Postocular spot and area behind eyes orange brown. Rear of head yellowish white.

Thorax. Prothorax. Pronotum brownish yellow. Propleuron greyish blue. Pterothorax with bluish grey or silver stripes as follows: one on the mesepisternum adjacent to the humeral suture, another on metepisternum continuing on to mesinfrepisternum and a third one on metepimeron. Legs yellowish, wings hyaline, venation brown, pterostigma light brown surrounded with yellow. Px in FW 11, in HW 9–10 R 3 in FW originating near Px 5, in HW near 4.. Petiolation distal to Ac by a distance equal (50%) or ½ as long (50%) as Ac in both wings.

Abdomen. S1–2 dorsally brown laterally bluish gray. S3–7 dorsally brown ventro-laterally brownish yellow. S8–10, cercus, and paraproct brownish orange.

Structural characters. Hind prothoracic lobe with well-developed lateral lobes ( Fig. 41 ); median lobe projected caudally, subtriangular, with borders two-lipped. Mesepisternal tubercles low (0.64 mm), in dorsal view rounded, with bases well separated from mid-dorsal carina ( Fig. 41 ). Cercus subquadrangular in dorsal view ( Fig. 81 ); ventral process in posterior view with medial margin straight ( Fig. 83 ), in lateral view shaped like an isosceles triangle tapering into a narrow, straight tip ( Fig. 82 ). Paraproct subequal to cercus. Penis as described for genus, but filiform process of internal fold extends beyond lateral border of penis ( Fig. 92 ).

Dimensions (mm). Abdomen 26.77–27.50 (mean 26.91); HW 14.8–15.73 (mean 15.32).

Description. Female holotype

Head. Labium yellowish. Labrum brown surrounded by yellow. Base of mandibles and genae yellow; anteclypeus and postclypeus black; antefrons and top of head dominantly brownish orange, with a black band adjoining the eye dilated posteriorly to form a large subtriangular black area connected with that of the opposite side by a narrow black stripe at occipital bar. A rounded blue postocular spot within black area. A transverse orange stripe at postocular area connecting with that of the opposite side through occipital bar. Antennae brown, the two basal segments black.

Thorax. Color including legs and wings, as in the male. Px in FW 12, in HW 11; R 3 in FW originating near Px 6, in HW near 5. Petiolation distal to Ac by a distance equal to length in both wings.

Abdomen. S1 dorsally orange, laterally bluish grey, S2 and proximal 1/3 of S3 dorsally brown, laterally bluish grey. Distal part of S3, and S4–8 dorsally brown, ventro-laterally brownish yellow. S9–10 brownish yellow.

Structural characters. Hind prothoracic lobe with a semicircular and depressed median lobe separated from lateral lobes by two deep concavities ( Fig. 51 ). Hind margin of mesostigmal plate curved anteriorly and then laterally forming a C-shaped structure ( Fig. 51 ). Mesepisternal tubercles lacking.

Dimensions (mm). Abdomen 30.71; HW 18.82.

Remarks. T. tirio belongs in the mammilaris species group together with T. geijskesi , T. karitiana , T. mammilaris , and T. yanomami . Male is very close to T. mammilaris , but female is more similar to T. yanomami . Differences are given in the keys. Specimens were collected at temporary pools in the savannah. The ecological significance of this habitat is discussed under Ecological Considerations.

Characters Tuberculobasis Leptobasis Metaleptobasis Denticulobasis

Frons Rounded Rounded Angulated Rounded

Pale postocular Present 97.7%, absent Present 53.2%, Absent 100% Present 100%

spots* 2.23% absent 46.8% n = 25 n = 7 n = 45 n = 32

Median lobe of Distinguishable and Poorly Mostly distinguishable Distinguishable and

hind prothoracic projected caudally distinguishable and but not projected projectedcaudally

lobe in males not projected caudally

caudally

Mesepisternal Present in males and Absent Present in males and Present in males and

processes most females females females

Type of Mostly horns in males, Horns in males,

mesepisternal Tubercles No processes tubercles in females tubercles in females

processes

Supplementary Well-developed but

tooth of tarsal claws Well-developed small Absent Well-developed

Petiolation in At or slightly distal: At or slightly Distal by ½ to twice Distal by ½ to twice

relation to Ac ** 11.74%, distal by ½ to distal: 100% length of Ac (100%) length of Ac l: 100%

twice length of Ac: n = 133 n = 90 n = 28 88.25%

n = 315

Pair of lateral

chitinized spines on Absent Present Absent Absent

distal segment of

penis

Penis internal fold Present Absent Absent Present

Filiform process of

penis internal fold Present Absent Absent Present

Length of cercus in

relation to S10*** Much shorter Much shorter Subequal Subequal

Ventral process of Present Present Absent Absent

cercus

Membranous

depression at dorsal Absent Absent Absent Present

surface of cercus

Vulvar spine**** Present 98.2%, absent Present 73.3%, Absent 100% Replaced by a

0.98% absent 26.7% n = 20 denticulated vulvar n = 57 n = 30 plate

Ovipositor Not surpassing tip of Surpassing tip of Not surpassing tip of Not surpassing tip of

cercus cercus cercus cercus

Denticles of ventral Subtriangular, high and Subtriangular, low Subrectagular, high and

border of ovipositor directed ventro- and directed directed ventro-

lateral valve in medially. Associated posteriorly. Not studied with SEM medially. Associated

S.E.M. seta long and fine tipped Associated seta seta short with apex

long and fine truncated tipped

* n = number of specimens herein described, those from the literature plus 30 specimens of T. costalimai , 32 of L.

vacillans , and 25 specimens of 10 species of Metaleptobasis .

** n = number of wings of species here described plus 80 wings of T. costalimai , 30 of L. vacillans and 90 of 10 species

of Metaleptobasis .

*** excluding distal lobe.

****n = number of female specimens of species here described, those from literature plus 40 females of T. costalimai

and 30 of L. vacillans .

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 47 – 54. Tuberculobasis female thorax, in dorsal view: T. cardinalis, holotype (47); T. costalimai, allotype (48); T. inversa, Peru, Loreto (49); T. mammilaris, Venezuela (50); T. tirio, allotype (51); T. williamsoni, allotype (52); T. yanomami, paratype (53), and in dorso-lateral view: Tuberculobasis sp. 1, Manaus, Amazonas (54) [47 by N. von Ellenrieder; 50, 53 by J. De Marmels].

FIGURES 78 – 86. Tuberculobasis, male, anal appendages in dorsal, lateral, and posterior view: T. mammilaris, lectotype (78 – 80); T. tirio, holotype (81 – 83); T. yanomami, holotype (84), paratype (85 – 86) [78 – 80, 85 – 86 by R. W. Garrison].

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].