Lecteria (Lecteria) teko, Mederos & Pollet, 2019

Mederos, Jorge & Pollet, Marc, 2019, Three new species of Lecteria Osten Sacken, 1888 (Diptera: Tipulidae) from a scientific survey in Mitaraka (French Guiana), Zoosystema 41 (25), pp. 497-512 : 504-507

Lecteria (Lecteria) teko n. sp.

( Figs 1L ; 5-7 )

urn:lsid:zoobank.org:act:38CE5BE9-956A-4B4E-9C0C-ED994AAB844E

TYPE MATERIAL. — Holotype. ♂ in 70% ethanol. First label:“ FRENCH GUIANA, Mitaraka, MIT-C-RBF1, 02°14’10.8”N / 54°26’49.5”W, 258 m, 27.II.2015 - 8.III.2015, tropical wet forest (bas-fond), YPT, M. Pollet leg. La Planète Revisitée Guyane 2015, MNHN PNI, APA 973-1 /Sample code: Mitaraka/133”. Second label: “ Lecteria (Lecteria) teko n. sp. Mederos & Pollet det. 2017”. Third label: “ HOLOTYPE /ED10574” ( MNHN). Genitalia mounted on slide and labelled as follow: First label “ FRENCH GUIANA, Mitaraka, MIT-C-RBF1, 02°14’10.8”N / 54°26’49.5”W, 258 m, 27.II.2015 - 8.III.2015, M. Pollet leg.”. Second label “ Lecteria (Lecteria) teko Mederos & Pollet det. 2017 HOLOTYPE ”.

DIAGNOSIS. — Due to the loss of all legs in the holotype, it is impossible to compare L. teko n. sp. with the other species of the subgenus, by the absence of characters so important as the color pattern in the tarsi, but also in the femora and tibiae. However, the distinctness of the male genitalia of L. teko n. sp. proved sufficient to separate this species, especially by the presence of a wide and trilobed interbase with acute apices, a unique character in the subgenus ( Fig. 7C ), in combination with an outer gonostylus divided in two small spike-shaped processes at apex. In addition, L. teko n. sp. has a brown to dark brown thorax as general appearance, and pale brown to yellowish brown pleura with a brown longitudinal stripe from the cervical sclerites through the upper margin of the fore leg, anepisternum, anepimeron and ending in the anatergite.

ETYMOLOGY. — The name of this species, a noun in apposition, refers to the Tekos people, one of the two Amerindian peoples that inhabit the territory where the species was found i.e., Maripasoula, French Guiana.

DESCRIPTION

Male (holotype)

Body length. 13.3 mm (without antennae); wing length 10.5 mm; antennal length 2.1 mm; length of terminalia‰. 8 mm.

Head. Dark brown dorsally ( Fig. 5B ), and brown ventrally. Maxillary palpus brown to pale brown, four palpomeres, ovoid, the second and third subequal in length, the fourth palpomere the smallest. Antenna ( Fig. 5C ) mainly brown to pale brown, 16-segmented. Scape and pedicel pale brown. Flagellum with 14 flagellomeres, with segment 1 pale brown to yellowish brown, and the remaining brown, progressively paler towards the apex. Flagellomeres 1 to 5 oval, decreasing in length and width towards apex, longer and slightly wider than flagellomeres 6-14, former covered with short and thin microsetae and with one single verticil (flagellomeres 4-5 of right antenna with two verticils); flagellomeres 6-13 with five verticils, and the last flagellomere with nine verticils.

Thorax. Brown to dark brown, with some pale brown areas. Pronotum brown. Mesoscutum uniformly brown to pale brown, with center almost yellowish brown, from prescutum to transverse suture, bordered with narrow brown to pale brown stripe ( Fig. 6 ). Scutellum dark brown, with almost black posterior and lateral margins. Mediotergite with dark brown area at its center, brown stripe-like areas bordering this central area, and with almost black lateral margins. Cervical sclerite dark brown. Anepisternum brown. Anepimeron brown at upper half ( Fig. 6A ), with pale brown posterior margin and pale brown at lower half. Membrane area adjacent to anterior spiracle pale, almost white, contrasting with brown longitudinal stripe formed by color pattern on anepisternum and anepimeron. Laterotergite brown on dorsal 2/3, pale brown on ventral third (katatergite). Katepisternum with about dorsal half pale brown, brown on less than ventral half. Meron, metakatepisternum and metanepisternum brown to pale brown. Dark brown area at posterior margin of posterior spiracle, just below halter basis. Halter with stem and knob pale brown, white at its basis.

Wing. Almost with the same pattern as in L. mitarakanea n. sp. Background with a very pale brown tinge ( Fig. 5A ). Relatively well defined small brown spots at basis of RS and

R 2+3+4, at R 1+2 (stigma area) and at the end of R 3. Less obvious, poorly defined brown areas at basis of vein R 5, vein r-m, transverse veins of cell dm, at bifurcation of M 1 and M 2, in basal transverse section of CuA 1, and a small spot midway of A 1.

Legs. Nearly entirely lacking. Coxae almost white, pale brown in the dorsal third, fore coxa brown to dark brown on its dorsal margin ( Fig. 6A ). Trochanters brown.

Abdomen. All tergites pale brown, reminiscent (very subtle) of a longitudinal central, very broad brown stripe. Lateral margins of tergites 1-8 dark brown, both anterior and posterior margins whitish; 9th tergite completely brown. Sternites mainly white, with 8th and 9th sternites pale brown.

Terminalia. Tergite 9 brown, approximately twice as wide as long ( Fig. 7 ). Gonocoxite cone-shaped ( Fig. 1L ), almost cylindrical, about twice as long as wide. Gonostylus terminal, outer gonostylus slightly longer than inner gonostylus. Outer gonostylus at apex divided in two small spike-shaped processes. Aedeagal complex ( Fig. 7C ): interbase wide, trilobed with acute apices. Aedeagus short and straigh, not surpassing the interbase.

Female

Unknown.

REMARKS

The color pattern shown in the pleura of L. armillaris and L. mattogrossae , in combination with the coloration in the mesonotum, scutellum and mediotergite, differs markedly from the pattern in L. teko n. sp. According to Alexander (1969), the thorax in L. armillaris has a reddish brown mesonotum and somewhat pruinose pleura, with a row of brown spots; the thorax in L. mattogrossae shows a light grayish brown scutum, a dull yellow scutellum and a mediotergite with a narrow indistinct brown median line and yellowish pleura, with a gray pruinosity and a dark brown stripe extending from behind the head to the wing base, involving the base of the fore coxa.

Figures

FIG. 1. — Terminalia of Neotropical species of Lecteria (Lecteria) Osten Sacken, 1888: A, L. acanthosoma Alexander, 1969; B, L. acanthostyla Alexander, 1969; C, L. bicornuta Alexander, 1969; D, L. cetrata Alexander, 1969; E, L. fuscitarsis Alexander, 1969; F, L. retrorsa Alexander, 1969; G, L. simplex Alexander, 1969; H, L. upsilon Alexander, 1969; I, L. calopus (Walker, 1856); J, L. wayana n. sp.; K, L. mitarakanea n. sp.; L, L. teko n. sp. A-H, modified by Alexander (1969); I, modified by Ribeiro & Blagoderov (2009).

FIG. 5. — Lecteria (Lecteria) teko n. sp. male, holotype: A, wing; B, head; C, detail of the first antennal flagellomeres. Scale bar: 1 mm.

FIG. 6. — Lecteria (Lecteria) teko n. sp. male, holotype, thorax: A, lateral view; B, dorsal view. Scale bars: 1 mm.

FIG. 7. — Lecteria (Lecteria) teko n. sp. male, holotype: A, terminalia, dorsal view; B, terminalia, ventral view; C, aedeagal complex (dorsal view). Scale bars: A, B, 0.5 mm; C, 0.3 mm.