Microcentrum xavieri Sovano & Cadeña-Castañeda, 2015

Da Silva Sovano, Rafael S. & Cadena-Castañeda, Oscar J., 2015, New species of Microcentrum Scudder, 1862 (Orthoptera: Tettigonioidea: Phaneropteridae) from Amazon rainforest, Zootaxa 3937 (3), pp. 591-600 : 593-597

Microcentrum xavieri Sovano & Cadeña-Castañeda n. sp.

( Fig. 2–4 )

Diagnosis. Tegmen lanceolated with a conspicuous yellowish-green venation, delineated, resembling a mined leaf in the costal vein, costal vein containing yellow spots ( Fig. 2 ). Tympanic foramen green in both sides. Forceps-like cerci, denticulate in the distal portion. Subgenital plate long (mean 5.1 mm), anterior margin deeply emarginated. Styles cylindrical.

Holotype. ♂ Brasil, Amazonas, Manaus, ZF-2 Km-14, Torre 35 mts altura (02°35'21"s / 60°06'35"w) 13- 16.viii.2004, J.A.Rafael; F.F.Xavier F°; A.R.Ururahy; A.Silva F°, & S.Trovisco, Lençol: Luz Mista e BLB. ( INPA).

Description. Color: Light-green ( Fig. 3 A). Head: Broad fastigium (one half the length of the pedicel antennal), contiguous to the forehead ( Fig. 3 B). Globular compound eyes. Central ocellus conspicuous, lighter colored when compared to remainder of the body. Thorax: Pronotum Smooth, lateral lobes longer than broad, lighter in color when compared to remainder of the body ( Fig. 3 C). Tegmen lanceolate with a conspicuous reticulate venation as a mined leaf, anterior margin with yellow punctuations along its proximal half, black pigmented stridulatory field ( Fig. 3 D). Legs: hind femur with the proximal portion lighter in color compared to remainder of the body. Abdomen: tenth tergite unmodified, epiproct projected, triangular, not acuminate. Forcepslike cerci, without ramifications, armed with a tooth at apex ( Fig. 3 E). Subgenital plate longer than broad, anterior portion deeply emarginated with slender stylus ( Fig. 3 F).

Comments. Some specimens may display a slight variation in the pattern of tegmen spots ( Fig. 3 G). This variation has so far been observed only in individuals collected at high altitudes (Roraima State proximities). Remaining characteristics of these specimens agree exactly like those of the holotype.

Females. Coloration of the specimens and body structure according to the holotype description. Subgenital plate rectangular, proximal margin emarginated, V-shaped; distal margin slightly depressed in the median portion ( Fig. 4 A). Ovipositor short (mean 6: 13 mm), abruptly curved upwards, distal portion serrate from the inner margin to its apex, with the external margin smooth ( Fig. 4 B).

Etymology. The specific epithet is in honor and acknowledgment to the biologist Francisco Felipe Xavier Filho (Chiquinho), friend and collector of this species.

Distribution. Known for the State of Amazonas, Brazil, for Colombia, and for localities at the Brazil- Colombia boundary.

Examinated material. Paratypes: 2♀ Brasil, Amazonas, Presidente Figueiredo, Am 240—Km-24 (Est. Balbina) (02°00'55"s / 59°49'40"w), 16-18.ix.2009, J.A.Rafael; F.F.Xavier F°; A.C.Pires; P.Dias; A. Paladini; F.W.Leivas; L.Martins; L.D.Wendt, Lençol: Luz Mista. 1♂ Brasil, Amazonas, Presidente Figueiredo, Am 240—Km 24 (Est. Balbina) (02°00'55"s / 59°49'40"w), 16–18.ix.2009, J.A.Rafael; F.F.Xavier F°; A.C.Pires; P.Dias; A. Paladini; F.W.Leivas; L.Martins; L.D.Wendt, Lençol: Luz Mista. ( INPA). 1♂ Brasil, Amazonas, Presidente Figueiredo, Am 240 Km-24, (02°01'55"s / 59°49'59"w), 04–08.ix.2009, F.F.Xavier F°; T.K.Krolow & G.Lourido, Lençol com Luz Mista. 1♂ Brasil, AM, Manaus, AM-010 km-50, Ramal da Vó leuda (02°44'37.40"s / 59°54'12.74"w) 05–08.ix.2013, F.F.Xavier F°; D.M.Mendes; Z.lopes Leg., Lençol + Luz. (MUD). 1♀ Brasil, AM, Manaus, ZF-2 Km-14, Torre 35 mts altura, (02°35'21"s / 60°06'55"w), 13–16.viii.2004, J.A.Rafael; F.F.Xavier F°; A.R.Ururahy; A.Silva F°, & S.Trovisco, Lençol: Luz Mista e BLB. 1♂ Brasil, AM, Manaus, ZF-2 Km-14, Torre, 40 mt alt., (02°35'21"s / 60°06'55"w), 18-21.ii.2004, J.A.Rafael; C.S.Motta; F.F.Xavier F°; & A.Silva; S. Trovisc Luz mista/ BL, BLB, Lençol. ( MPEG), Pará, Brasil. 1♂ Colombia, Amazonas, Leticia, 2 de febrero del 2014. J. Sanchez leg. (MUD).

Measurements (mm). Holotype: LB: 24.45; Pr: 5.38; Teg: 39.09; HF: 24.29; HT: 25.51; SP: 5.3; C: 2.92. Paratypes: (7♂) LB: 22.1-25.9; Pr: 4.74–5.4; Teg: 36.02–37.68; HF: 22.18–23.65; HT: 24.20–25.06; SP: 4.65–5.1; C: 2.56–2.87. (3♀) LT: 26.68–28.8; Pr: 5.15–5.37; Teg: 38.65–39.75; HF: 23.3–24.08; HT: 24.48–26.61; SP: 1.89–2.2; C: 1.76–1.9; Ov: 5.92–6.37.

As from the occurrence localities of the Amazonian species of Microcentrum ( Table 1), a distribution map was plotted ( Fig. 5 ), according to the areas of endemism established to Amazon.

Species Occurrence

M. amacayacu n. sp. Colombia, Parque Nacional Natural Amacayacu M. irregulare ( Piza, 1973) Brazil North, Acre, Cruzeiro do Sul

M. lanceolatum ( Burmeister, 1838) Colombia, Parque Nacional Natural Amacayacu M. nauticum Piza, 1980 Brazil North, Amapá, Serra do Navio M navigator Piza, 1980 Brazil North, Amapá, Serra do Navio M. surinamense Piza, 1980 Surinam, Marowijne, Langamankondre M. xavieri n. sp. Amazonas State, Brazil / Leticia, Colombia

Figures

FIGURE 2. Microcentrum xavieri, Sovano, Cadena-Casteñada n. sp. Photo: Diego Mendes.

FIGURE 3. Microcentrum xavieri, Sovano, Cadena-Casteñada n. sp. A) Holotype, lateral view; B) Frons; C) Pronotum lateral lobes; D) Sternum; E) Stridulatory field; F) Cerci, dorsal view; G) Subgenital plate, verntral view; H) Variation in the pattern of spots the tegmen, paratype lateral view.

FIGURE 4. Microcentrum xavieri, Sovano, Cadena-Casteñada n. sp. A) Female, lateral view; B) Pronotal disc, dorsal view; C) Subgenital plate, ventral view; D) Ovipositor, lateral view.

FIGURE 5. Occurrence of Amazonian Microcentrum according to the areas of endemism. Modified of Silva et al. (2005).