Lestes dichrostigma Calvert, 1909

Lencioni, F. A. A., Neiss, U. G., Dutra, S. L., Furieri, K. S., Juen, L., Batista, J. D. & Vilela, Diogo S., 2021, Synopsis of Lestes from Brazil with description of Lestes demarcoi sp. nov (Zygoptera: Lestidae), Zootaxa 4990 (3), pp. 511-541 : 515

Lestes dichrostigma Calvert, 1909

Fig. 3 (♂ —App), Fig. 17 (♂ —habitus), Fig. 27 (♀ —habitus), Fig. 37 (A— ♀ S8–S10), Fig. 39 (A— ♀ basal plate), Fig. 40 (C— ♀ pectoral color pattern), Fig. 42 (♂ —live photo).

Etymology: dichrostigma = dichros, Greek (δίχρως) for two–colored + stigma, Latin for mark, in reference to the bicolored pterostigma, which occurs only in the juvenile.

Lestes dichrostigma Calvert, 1909: 102 , Figs. 8 , 31–32 (description of male, female, illustration of male thorax in ventral view, appendages in lateral and mediodorsal views); Kennedy 1942: 283 (illustration of appendages in lateral and dorsal views); Jurzitza 1981: 117 (presence in Argentina); Davies & Tobin 1984: 31 (data on publication and distribution); Bridges 1994: (VII) 68 (data on publication, type depository, type locality and references); De Marmels 1990: 336 (presence in Venezuela); Lencioni 2005: 91, Fig. 50(A–C) (data on description, type locality, type deposition, distribution, larval description, illustration of appendages in lateral and dorsal views from Kennedy 1942, thorax in ventral view from Calvert 1909); Costa et al. 2006: 60–61, Fig. 30 (pterothorax color pattern in ventral view, key for adult males); Muzón & Muñoz 2007: 238 (larva and data on Argentinian specimens); Garrison et al. 2010: 117, Figs.: 502, 510, 511, 512 and 518 (data on species with reference to larval description, original illustration of appendages in lateral and dorsal views, penis in ectal and lateral views, latero–ventral view of male S1–2); Lencioni 2017: 105–106, Fig. 40A–D , 41A–C , DL-01 (data on description, type locality, type deposition, distribution, and larval description, appendages in lateral and mediodorsal views, female S8-S 10 in lateral view, thorax in ventral view, male and female habitus, live photo).

Types. Syntypes in ANS (not examined) .

Larva described. Yes ( Muzón & Muñoz 2007).

Material examined. (5 ♂♂ + 3 ♀♀): 1 ♂ Brazil: São Paulo, Rio Claro, Sítio Primavera , 22º24’ 33” S & 47º36’ 44” W, 569 m, 20.x.1996, F.A.A. Lencioni leg. ; 1 ♀ Brazil: São Paulo, Mogi das Cruzes, 1996, F.A.A. Lencioni leg. ; 2 ♂♂ Trinidad: Valencia , forest just SE of town, 15.iv.1965, T. W. Donnelly leg. ; 1 ♀ Brazil: São Paulo, Jacareí, Fórum da Comarca de Jacareí , 26.ix.2001, F.A.A. Lencioni leg. ; 1 ♂ Brazil: São Paulo, Jacareí, Fazenda Santana do Rio Abaixo , 23º15’00”S & 46º00’15”W, 591 m, 25.x.2001, F.A.A. Lencioni leg. ; 1 ♀ Brazil: São Paulo, Jacareí, Fazenda Santana do Rio Abaixo , 23º15’ 00” S & 46º00’ 15” W, 591 m, 10.xi.2001, F.A.A. Lencioni leg. ; 1 ♂ Brazil: São Paulo, Jacareí, Jardim Coleginho, Rua Aníbal , 216, 03.xii.2010, found dead in a spider web .

Distribution. Brazil (São Paulo, Mato Grosso (?)), Venezuela, Trinidad and Argentina.

Diagnostic characters. ♂ —Cercus in lateral view: basal two thirds straight, with medial expansion clearly visible as an inverted triangle with the vertex at the level of the tip of the paraproct, tip of cercus comma–like shaped. Cercus in mediodorsal view: base of cercus without spine, medial expansion of cercus almost twice the width of the base and roughly triangular with a small bump at the apical end, without any spine. Paraproct in lateral view: almost a third of the length of the cercus. Paraproct in dorsal view: with a broad base and finger–like distal end.

♀ —Basal plate: species belonging to basal plate group 1 ( Fig. 38 ), with dorsal side twice the length of ventral side, posterior side with ventral section shorter than the dorsal section ( Fig. 39A ). Pectoral color pattern as Fig. 40C .

Figures

FIGURE 3. Lestes dichrostigma: A—Appendages, lateral view; B—Appendages, mediodorsal view.

FIGURE 8. Lestes minutus: A—Appendages, lateral view; B—Appendages, mediodorsal view.

FIGURE 17. Lestes dichrostigma: Male habitus—A—blue form, B—brown form.

FIGURE 27. Lestes dichrostigma: Female habitus.

FIGURE 30. Lestes paulistus: Female habitus.

FIGURE 31. Lestes pictus: Female habitus.

FIGURE 32. Lestes tricolor: Female habitus.

FIGURE 37. Female S8–S10: Lateral view: A—Lestes dichrostigma, B—Lestes forficula, C—Lestes minutus, D—Lestes paulistus, E—Lestes pictus, F—Lestes tricolor, G—Lestes undulatus, H—Lestes demarcoi sp. nov.

FIGURE 38. Female basal plate of ovipositor, with three configurations found in the known Brazilian species of Lestes: 1 (Lestes dichrostigma, Lestes pictus, Lestes tricolor and Lestes undulatus), 2 (Lestes forficula and Lestes paulistus) and 3 (Lestes minutus and Lestes demarcoi sp. nov.). Parts are named as follows: D—dorsal side, A—anterior side, V—ventral side, P—posterior side, PD—dorsal section of posterior side, PV—ventral section of posterior side, AP—Acute process (as defined in Westfall & May (1996)), VA—anterior section of ventral side and VP—posterior section of ventral side.

FIGURE 39. Basal plate of ovipositor (The basal plate was kept in color while the rest was converted to grayscale to facilitate the visualization of the differences between species): A—Lestes dichrostigma, B—Lestes forficula, C—Lestes minutus, D— Lestes paulistus, E—Lestes pictus, F—Lestes tricolor, G—Lestes undulatus, H—Lestes demarcoi sp. nov.

FIGURE 40. Pectoral color pattern: A—Lestes auritus (female), B—Lestes bipupillatus (female), C—Lestes dichrostigma (female), D—Lestes falcifer (male), E—Lestes fernandoi (male), F—Lestes forficula (female), G—Lestes jurzitzai (male), H— Lestes minutus (female), I—Lestes paulistus (female), J—Lestes pictus (female), K—Lestes quadristriatus (male), L—Lestes tricolor (female), M—Lestes undulatus (female), N—Lestes demarcoi sp. nov. (female).

FIGURE 41. Penis: Lestes demarcoi sp. nov.: A—lateral view, B—ectal view.

FIGURE 42. Lestes dichrostigma male—São Jose dos Campos—SP (Photo Frederico A.A. Lencioni).