Marcgraviella christianae Desutter-Grandcolas & Souza-Dias

Souza-Dias, Pedro G. B. & Desutter-Grandcolas, Laure, 2014, A new genus and two new species of Luzarinae cricket from the Atlantic Forest of Northeast Brazil (Orthoptera, Grylloidea), Zootaxa 3872 (5), pp. 498-512 : 505-508

Marcgraviella christianae Desutter-Grandcolas & Souza-Dias , n. sp.

Figures 4–5

Type locality. Brazil, Pernambuco State, São Lourenço da Mata municipality, Estação Ecológica Tapacura.

Type material: Holotype: Brazil, Pernambuco, São Lourenço da Mata, Estação Ecológica Tapacura, 1 male, 05-07.vii.1990, C. Amedegnato & S. Poulain, rec. (MNHN-EO-ENSIFXXXX). Molecular sample LDG 471.

Etymology. Species named after the French Orthopterist Christiane Amedegnato, for her work on Neotropical Orthoptera .

Diagnosis. Morphology and coloration very similar to M. muriciensis Souza-Dias , n. sp. The main differences are the longer FWs in male, almost reaching the anterior margin of supra anal plate ( Fig. 4 D), their more complete and clear venation ( Fig. 5 E), the stridulatory file (26 teeth), the subgenital plate of the male ( Fig. 4 F), the median structure on tergite 3 (glandular?, Fig. 4 C) and the phallic complex (pseudepiphallic parameres vertical, and not dorsal as in M. muriciensis Souza-Dias , n. sp., and with an additional inflatable lobe; Fig. 5 D). Female unknown.

Description. In addition to the character of the genus: Palpi lacking in the holotype. TIII inner serrulation: no spine between the apical and the first subapical spur and between subapical spurs 1 and 2; 3 spines between spurs 2 and 3; 7 spines between subapical spurs 3 and 4; 15-17 (mean 16) spines above subapical spur 4. TIII outer serrulation: no spine between apical and subapical spurs; 2-3 (mean 2.5) spines between subapical spurs 1 and 2; 4 spines between subapical spurs 2 and 3; 8-10 (mean 9) spines between subapical spurs 3 and 4; 12-14 (mean 13) spines above subapical spur 4. Tarsomeres III: 7-8 (male, mean 6.5) outer and 4-5 (mean 4.5) inner spines, in addition to apical spines.

Coloration. Very similar to that of M. muriciensis Souza-Dias , n. sp., especially for the head dorsum ( Fig. 4 A) and clypeus; face light yellow with a slightly darker line from each side of median ocellus down to epistemal suture, along a light yellow line, and a light brown band from the lower margin of each eye to the epistemal suture; cheeks light brown, with an indistinct yellow spot ( Fig. 4 B). Scapes light yellow brown ( Fig. 4 A). Antennae light brown basally; with 3 distantly set, small yellow rings, before a wider yellow part covering about 10 articles. Pronotum light brown, with a small yellow line between LL and DD close to anterior margin ( Fig. 4 C, arrows). Tergites and sternites yellow brown, the distal margin of supra anal plate darker. Legs all light yellow brown, the knees somewhat darker; TIII spurs yellowish at base and near the brown apex.

Male. Metanotum with 2 high, ball-shaped structures with irregular surface (probably glandular), between the muscular insertions; distal margin inflated and raised ( Fig. 4 C). FW venation ( Figs 5 E, 4D): stridulum complete, with a harp and mirror, in addition to the deep set file; harp crossed by four oblique, parallel veins; apical field very reduced; area between the chords and the diagonal wide and crossed by one (or two) row(s) of cells, according to the hypothesized location of the mirror anterior angle. Stridulatory file with 26 small and high teeth, located on the horizontal part of the vein only. Lateral field ( Fig. 5 F): R and MA parallel along most of their length, fused distally; MA and MP broadly parallel over their whole length, connected distally by a faint, transverse vein. Tergite 3 with a median structure ( Fig. 4 C wide arrow, glandular?). Supra anal plate without elongate posterior angles, but with two bunches of long setae ( Fig. 4 E). Subgenital plate short and high; with a deep longitudinal furrow over 3/4 of its length; surface of the plate on each side of the furrow bulged, with a pair of highly convex hill-shaped structures on each side of the anterior end of the furrow ( Fig. 4 F).

Male genitalia: Pseudepiphallic parameres vertical ( Fig. 5 B, C); lobes completely visible only in posterior view ( Fig. 5 D); each paramere formed by an elongated inflatable lobe and two concaves smaller ones, also inflatable ( Fig. 5 B, D), with an additional small inflatable lobe

Female. Unknown.

Measurements (in mm). Male holotype: BL, 9.7; Hw, 2.5; ioD, 1.2; Lpron, 2; awpron, 3.2; pwpron, 2.6; LFW, 4.9; wFW, 3.1; LFIII, 11.9; wFIII, 2.4; LTIII, 12.9; LtarsI-III, 4.5.

Remarks. The alteration in the pseudepiphallic parameres, with its consequent vertical position, is only known to this moment in this species.

Acoustic behaviour. Not documented.

Habitat. Not documented.

Figures

FIGURE 4. Marcgraviella christianae Desutter-Grandcolas & Souza-Dias, n. sp. Male holotype. A – B, head and pronotum, dorsal (A) and lateral (B); C, particular structures of tergite 3 (wide arrow) and metanotum, and color pattern of pronotum DD (simple arrow); D, forewings, dorsal; E, supra anal plate, dorsal; F, subgenital plate, lateral. Scale bar: 1 mm.

FIGURE 5. Marcgraviella christianae Desutter-Grandcolas & Souza-Dias, n. sp. Male holotype. A – D, male genitalia in dorsal (A), ventral (B), lateral (C), and apical view (D); E – F, forewing, dorsal field (E), lateral field (F). Abbreviations, see page 500. Scale bar: 1 mm.