Rumea zebra Chamorro-Rengifo & Lopes-Andrade

Chamorro-Rengifo, Juliana & Lopes-Andrade, Cristiano, 2009, The first report of Rumea Desutter, 1988 (Orthoptera: Phalangopsidae: Paragryllini) from Brazil, with the description of three new Amazonian species, Zootaxa 2265, pp. 48-68 : 52-54

Rumea zebra Chamorro-Rengifo & Lopes-Andrade , sp. nov.

( Figs 2–4 )

Etymology. The specific epithet refers to the coloration pattern of the legs, which consists of alternating dark yellowish and dark brownish stripes, resembling the coloration pattern of a zebra .

Diagnosis. The body coloration of R. zebra sp. nov. is lighter than that of R. manauensis sp. nov. and R. tigris sp. nov., so the contrast between the brownish and yellowish stripes is comparatively more distinctive. This new species is also smaller than the latter two species. It can also be distinguished from the other described Rumea by the following combination of characters: (i) face with striped coloration, the brownish stripes being narrower than that of R. manauensis sp. nov.; (ii) pronotum with anterior and posterior sides broadly rounded; male genitalia with (iii) dorsal tip of the longitudinal midline of the pseudepiphallic arm with two small lobes (conspicuous in lateral view), (iv) one lateral lobe (of the pseudepiphallus) visible in dorsal view, (v) each lateral lobe of the pseudepiphallic arm directed outwards, and not laterally pronounced, (vii) ectophallic apodemes slightly curved inwards.

Description (holotype male & allotype female). Holotype male: TL 16.01; HF 11.92; HT 9.68; sHT, inner margin 24–25, outer 22; sHts, inner margin 3–7, outer 8; PL 2.45; PW 3.41; EyeW 1.37; TegL 12.93; TegW 5.42; SL 3.78; NT 146. Allotype female: TL 16.87; HF 11.99; HT 9.32; sHT, inner margin 21–22, outer 18–20; sHts, inner margin 7, outer 7–8; PL 2.78; PW 3.52; EyeW 1.37; TegL 13.78; TegW 4.64; OV 12.16. General coloration consisting of dark brownish and dark yellowish areas ( Fig. 2 ). Head with strong bristles on the vertex ( Fig. 3 A). Face coloration dark yellowish with brownish stripes. Frons with a brown stripe from the vertex to the frontoclypeal suture that narrows in the last third, and a yellowish oval area at eyes level; two oblique lateral stripes from the ventral margin of the antennal socket to the frontoclypeal suture, interrupted approximately at the first third above the frontoclypeal suture; each gena with two brownish stripes, one from the ventral margin of the eye to the ventral margin of the head, and the other bordering the ventral margin of the head and reaching the postgena. Clypeus almost completely brown, with three distinct yellowish oval areas, one in the center and one in either side of the longitudinal midline of the rostrum. Labrum greyish with two faint lateral stripes, none reaching the ventral margin. Mandibles yellowish with a few dark spots; cutting edge dark brownish. Maxillary and labial palpi with whitish bases and several distinctive dark spots at the base and tip of each palpus. Last palpomere of each maxillary palp dark brownish. Mouthparts in ventral view, excepting the appendages, yellowish with several black spots. Antennal scape light yellowish, with an irregular dark brownish spots; antennomeres light yellowish. Dorsal surface of the head ( Fig. 3 B) with four brownish longitudinal stripes: two stripes originating at the posterior margin and jointed at the eyes level, so that only one thick stripe reaches the anterior margin; two lateral stripes, one at each side, originating at the posterior margin and ending at the ventral margin of each eye. Additionally, there is one stripe, originating at the posterior base of each lateral stripe, which is bifurcated forming one stripe that reaches the inner margin of the eye and another faint stripe extending to the anterior ventral surface but disappearing, not reaching the face. Eyes dark brownish, with a whitish oval area at the dorsal inner surface; central ocellus oval, almost three times larger than the other two ocelli together, the latter being very small and inconspicuous. Thorax with the anterior and posterior pronotal angles rounded ( Fig. 3 C). Pronotum with disc mostly dark yellowish, bearing dark brownish marks; posterior area light yellowish; dark brownish lateral lobes and strong bristles at the anterior and lateral margins. Longitudinal midline of the pronotal disc with a small dark brownish triangular mark close to its anterior margin, and a distinctive triangular mark at each side of the midline, the outer mark being dark brownish and the inner mark dark yellowish; an indistinct dark yellowish oval mark on each side of the longitudinal midline, both marks being parallel to the posterior margin; and two oval dark yellowish marks at the midline, one large mark close to the posterior margin of the pronotum and the other above the first. Tegmina translucent, brownish; right tegmen ( Fig. 3 D) with the mirror bearing seven curved veins, the sixth vein from the anterior margin divided into two; harp with eight veins. Hindwings ( Fig. 3 E) translucent, brownish. Prosternum light yellowish, meso- and metasternum brownish, each with a small black mark near the base of the mid- and hindlegs. Fore- and midlegs ( Fig. 3 F) with similar coloration pattern, each as follows: coxa and trochanter yellowish and with indistinct dark spots like shadows; femur with the outer surface light yellowish, with one distinct brownish ring on the apex and another similar ring below it, the rings being separated from each other by a yellowish area, both rings interrupted at the lower surface; tibia with two brownish dark marks, one at the tip and the other at the middle. Each hindleg with the femur ( Fig. 3 G) bearing four distinct brownish areas intercalated with yellowish areas; hindtibia dark yellowish, with a dark brownish mark at the dorsal tip. First and second tarsomeres of fore- and midlegs darker than the third tarsomere and darker than the tarsus of the hindleg. Tarsus claws of all legs whitish, with black tips. Abdomen with the tergites light brownish, with irregular dark brownish spots like shadows. Sternites light brownish, the first and second ones lighter than the others. Penultimate tergite of the female ( Fig. 3 J) with a transversal division, with the anterior portion lifted up and leaving the posterior portion in low-relief (possibly a glandular area). Cerci dark yellowish. Posterior margin of the supra-anal plate broadly rounded ( Figs 3 H,J), larger in female ( Fig. 3 J) than in male ( Fig. 3 H), the plate in male being almost black, and in the female dark yellowish with irregular brownish spots like shadows. Subgenital plate of male ( Fig. 3 I.) with an indistinct emargination at the middle of the posterior margin ( Fig. 3 I); in female ( Fig. 3 K), this emargination is deep and broad, leading a V-shape cut of almost one-third the length of the plate at the longitudinal midline. Ovipositor ( Fig. 3 L) 0.72X the body length, with two little lobes at the ventral side before the apex. Male genitalia ( Fig. 4 ) with the dorsal tip of the pseudepiphallic arm with two small lobes at the midline, visible in lateral view ( Fig. 4 B); pseudepiphallic arm with lateral lobes directed outwards ( Fig. 4 A,C), not projected in lateral view ( Fig. 4 B); each pseudepiphallic lateral lobe with only one projection, well developed, visible in dorsal view ( Fig. 4 A); ectophallic apodemes slightly curved inwards ( Fig. 4 A); both rami reduced, each one with a small undulation.

Female genitalia ( Fig. 4 D) with a bell form; spermatheca tubular, broadly curved inwards, clockwise when seen from above, increasing in size from the basal to the apical portion.

Variation. Measurements of males (n=3, including the holotype): TL 16.01–17.46; HF 11.92–13.00; HT 9.68–9.95; sHT, inner margin 22–25, outer 22–23; sHts, inner margin 3–8, outer 8–10; PL 2.45–2.78; PW 3.41–3.95; EyeW 1.37–1.94; TegL 12.93–14.46; TegW 5.42–6.13; SL 3.78–3.91; NT 146-176. Measurements of females (n=3, including the allotype): TL 16.87–18.51; HF 11.93–12.40; HT 8.29–9.32; sHT, inner margin 19–25, outer 18–23; sHts, inner margin 6–8, outer 7–9; PL 2.45–2.78; PW 3.41–3.66; EyeW 1.37–1.52; TegL 13.39–14.07; TegW 4.64–4.97; OL 12.16–12.62. Right tegmen with six veins on the harp, and six to seven veins on the mirror; the last vein of the mirror being either ramified into two veins or unramified.

Type series. Holotype male labelled / Brazil, Manaus, Tarumã Mirim River. Joachim Adis [handwritten on white paper] / 47A TM BE. 22.3.1976 [handwritten on white paper] / Rumea zebra Chamorro-Rengifo & Lopes-Andrade 2009 [handwritten on red paper]/. Allotype female, same locality data as the holotype but collected in /49A TM BE 22.3.76 [handwritten on white paper]/ and additionally labelled / Rumea zebra Chamorro-Rengifo & Lopes-Andrade 2009 [handwritten on blue paper]/. Paratypes, same locality data as the holotype: 2 males, one collected in /48C TM BE 8.12.1976 [handwritten on translucent white paper]/ and the other in /49E TM BE 12-1-1976 [handwritten on white paper] /; 2 females, one collected in /47B TM BE 6.4.1977 [handwritten on white paper]/ and the other in /TM 48A TM BE 13.4.1977 [handwritten on white

Figures

FIGURE 2. Rumea zebra sp. nov., male holotype. A. Dorsal view. B. Lateral view. C. Ventral view.

FIGURE 3. Rumea zebra sp. nov., male holotype (A – I) and female allotype (J – L), unless otherwise specified. A. Frontal view of the face. B. Dorsal view of the head. C. Dorsal view of the pronotum. D. Ventro-lateral view of the foreleg. E. Lateral view of the hindfemur. F. Ventral view of the right forewing of a paratype. G. Dorsal view of the right tegmen. H. Dorsal view of the supra-anal plate. I. Ventral view of the subgenital plate. J. Dorsal view of the supra-anal plate. K. Ventral view of the subgenital. L. Lateral view of the ovipositor apex.

FIGURE 4. Rumea zebra sp. nov., genitalia of the male holotype (A – C) and female allotype (D). A. Dorsal view. B. Lateral view. C. Ventral view. D. Ventral view. Abbreviations: lateral lobe of the pseudepiphallic arm (Lat. l. ps. arm), ectophallic fold (Ect. f.), endophallic sclerite (End. scl.), lateral lobe (Lat. l.); ramus (r), ectophallic apodemes (Ect. ap.), genital chamber (G. C.), spermatheca (Spt.).