Tuberculobasis tirio Machado, 2009, sp. nov.
Creators: name: Machado, Angelo B. M.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Coenagrionidae
Tuberculobasis
Tuberculobasis tirio

description: 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.
description: Published as part of Machado, Angelo B. M., 2009, Denticulobasis and Tuberculobasis, new genera close to Leptobasis, with description of ten new species (Odonata: Coenagrionidae)., pp. 1-36 in Zootaxa 2108 on pages 27-29, DOI: 10.5281/zenodo.187806