Eidmanacris bidentata Sperber, 1998

Nihei, Silvio S., 2017, Taxonomic review of Eidmanacris Chopard, 1956 (Orthoptera: Grylloidea: Phalangopsidae), Zootaxa 4321 (1), pp. 1-93: 37-40

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http://doi.org/ 10.5281/zenodo.897058

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Eidmanacris bidentata Sperber, 1998


Eidmanacris bidentata Sperber, 1998 

( Figs. 24–26View FIGURE 24View FIGURE 25View FIGURE 26)

http://lsid.speciesfile.org/urn:lsid: Orthoptera  .speciesfile.org:TaxonName:28456

Eidmanacris bidentata Sperber, 1998 in Mesa, Sperber & Garcia, 1998: 45  (male and female descriptions). Type locality: Brazil, state of Minas Gerais, municipality of Viçosa.

Eidmanacris bidentata, Zefa, Fontanetti & Martins, 2010: 53  –58 (note on cytogenetics).

Type material examined. Holotype male, allotype, 1 male paratype, 2 females paratypes (MZSP). Holotype male labeled: “ Brasil (M.G.) Mun. Viçosa, Fragmento Florestal de 70 ha, Mata da Biologia , UFV, trilha VEEC // 8.VII.1996 //SPERBER, CF”  . Allotype labeled: “ Brasil (M.G.) Mun. Viçosa, Fragmento Florestal de 70 ha, Mata da Biologia , UFV, trilha VEEC, col. c/ aveia// 11.VII.1996 //SPERBER, CF & RIBEIRO  , PH ”. 1 male paratype  , 2 females paratypes labeled: “ Brasil (M.G.) Mun. Viçosa, Fragmento Florestal de 70 ha, Mata da Biologia , em folhiço, UFV, trilha VEEC, col. c/ aveia// 10.VII.1996 //SPERBER, CF & RIBEIRO  , PH ” ( MZSPAbout MZSP). Specimens preserved in ethanol 80%. 

Other material examined. Total : 2 males labeled: “ BRASIL (MG), Viçosa, Fragmento: BIOAbout BIO, Data: 03/VIII/ 2000, Sperber leg ”; “ Código #6011”, “ Eidmanacris bidentata Sperber, 1998  ”; “ Sperber det. 2004”. Specimens preserved in ethanol 80%. 

Distribution. Brazil, state of Minas Gerais.

Diagnosis. This species can be distinguished from other Eidmanacris  by the following characters: lateral projections of metanotal gland elongate, medially fused, anteriorly curved to pronotum; lateral-posterior projections of Supra-anal plate elongate, curved inwards, finger-shaped; apex of pseudepiphallic arm with superior and inferior projections pointed, internal projection absent.

Redescription. Head. Medium brown. Occiput light to medium brown with central maculae light brown, diagonal band dark brown going from occiput to margin of each eye; vertex medium brown with three lines light brown, vertical, in dorsal view ( Fig. 24CView FIGURE 24). Fastigium medium brown, apically dark, with two rows of bristles, almost longer than wide, slightly narrowed toward apex, separated from vertex by line forming “v” ( Fig. 24CView FIGURE 24). Frons light brown, with three dark brown vertical bands, two below eyes and antennal scape, one above clypeus ( Figs. 24A, BView FIGURE 24). Three ocelli present, well developed, forming isosceles triangle, central one rounded, lateral elliptical ( Figs. 24A, B, CView FIGURE 24). Eyes with unpigmented very small area on supero-internal angle ( Fig. 24CView FIGURE 24). Maxillary palpi, long, thin, pilose, medium to dark brown, distal portion of joints whitish; joints 3 and 4 almost same-sized, joint 5 little longer ( Fig. 24HView FIGURE 24); apex of joint 5 upcurved. Gena light brown in lateral view, posterior margin medium to dark brown, line medium brown connecting lower margin of eye with posterior border in lateral view ( Fig. 24BView FIGURE 24). Frontoclypeal suture dark yellow; clypeus light brown, lateral part darker, with two vertical, central bands dark brown; labrum whitish, lower portion light brown. Mandible light brown, with inner margin dark brown. Antennal scape light brown, inner margins medium to dark brown ( Fig. 24AView FIGURE 24); antenomeres medium brown interspersed with whitish, isolated antenomeres.

Thorax. Pronotum DD wider than long, medium brown, with sparse dark spots and maculae, slightly pubescent, inflated, dived by an almost no discernible sagittal light brown line ( Fig. 24CView FIGURE 24). DD cephalic margin sub concave, caudal margin slightly concave ( Fig. 24CView FIGURE 24); lateral lobes darker than DD, ventro-cephalic angle rounded, ventro-caudal margin gradually ascendant ( Fig. 24BView FIGURE 24).

Legs. FI, FII, TI and TII yellowish annulated with dark brown; TI with two same-sized apical spurs; TII with two inner apical spurs and one outer, smaller. FIII pale yellow, with thin stripes medium to dark brown on outer surface, dorsal margin and apical third medium brown in lateral view ( Fig. 24DView FIGURE 24). TIII yellowish brown; subapical spurs 4/4, with serrulation above and between subapical spurs, except between two distal ones; apical spurs 3/3, more developed on inner surface: median (iam) longer than and dorsal one (iad), ventral smallest (iav) (iam>iad>iav); outer apical spurs: median one longer (oam), dorsal sub-equal in length (oad), ventral smaller (oav) (oam>oad>oav). Basitarsi I, II and III yellowish.

Abdomen. Sub-elliptical in dorsal view, medium to dark brown, marbled, divided by light brown sagittal line, with spots dark brown.

Male. Medium-sized body, general coloration medium brown, with maculae and spots. FWs medium to dark brown, reticulated, short, sub-triangular, without glandular thickening apically, apex connected to single vein that divides the external part of FW as lateral field ( Fig. 24CView FIGURE 24); inner margins not touching each other; covering the metanotal gland, surpassing metanotum posterior border ( Figs. 24B, CView FIGURE 24). Metanotal gland present, anteromedian crest forming an inverted triangle with cluster of bristles; lateral projections elongate, medially fused, anteriorly curved to pronotum ( Figs. 24F, GView FIGURE 24). Supra-anal plate light brown, slightly pubescent; anterior margin sub-straight, lateral-posterior projections elongate, curved inwards, finger-shaped, with long bristles; posterior margin with central invagination ( Fig. 24IView FIGURE 24). Subgenital plate longer than wide, with lateral pubescence, dark brown on lateral part, centrally lighter; anterior margin almost straight, posterior margin rounded with small, central invagination forming two lobes ( Fig. 24KView FIGURE 24).

Phallic complex ( Figs. 25A –CView FIGURE 25; 26A –C). Pseudepiphallus: central portion of base of pseudepiphallic sclerite thinner in dorsal view; pseudepiphallic arms sclerotized, hard, upcurved in lateral view, slightly curved inwards in dorsal view; apex of pseudepiphallic arm with few bristles, superior projection pointed, supero-internal projection absent, inferior projection pointed; anterior projection of pseudepiphallic sclerite elongate, surpassing base of pseudepiphallic sclerite; PsP2 hardly sclerotized, bifid, surpassing posterior extremity of pseudepiphallic arms in dorsal view, apex pointed in lateral view, with membranous sphere on inner surface; sclerite A connected to base of pseudepiphallic arm, straight, connected and articulated with PsP2; PsP1 short, well sclerotized in ventral view. Ectophallic invagination: ectophallic apodeme elongate; ectophallic arc located posteriorly to base of pseudepiphallic sclerite in dorsal view; ventro-posterior projection elongate; dorsal projection sclerotized, short, slightly curved outwards. Endophallus: median-posterior projection of endophallic sclerite elongated, not surpassing PsP2 apex; lateral-posterior lobes of endophallic sclerite elongate; endophallic apodeme elongate, reaching apex of ectophallic apodeme.

Female. Larger than male, general coloration similar ( Fig. 24EView FIGURE 24). Supra-anal plate light brown, anterior margin concave, posterior margin rounded with long bristles ( Fig. 24JView FIGURE 24). Subgenital plate medium brown, wider than long, anterior margin slightly concave, posterior margin with central invagination ( Fig. 24LView FIGURE 24). Ovipositor as in figs. 24M, N.

Copulatory papilla ( Figs. 26D –FView FIGURE 26). Little longer than wide, cylindrical, anterior margin membranous until median portion in dorsal view, posterior margin unpigmented, centrally pointed.

Measurements (mm). Male (n=2): Hw, 2.69 ± 0.14 (2.54–2.85); iod, 1.33 ± 0.03 (1.3–1.36); Lpron, 2.72 ± 0.13 (2.54–2.85); awpron, 2.58 ± 0.09 (2.54–2.72); pwpron, 3.11 ± 0.17 (2.91–3.34); wpron 3.64 ± 0.18 (3.41– 3.84); LFW, 1.56 ± 0.21 (1.36–1.86); wFW, 1.56 ± 0.06 (1.48–1.67); LFIII, 12.15 ± 0.51 (11.4–12.6); wFIII, 3.03 ± 0.14 (2.85–3.15); LTIII, 12.07 ± 0.37 (11.55–12.45); Ltars 1-III, 3.45 ± 0.21 (3.15–3.6).

Female (n=2): Hw, 3.22; iod, 1.59 ± 0.03 (1.55–1.61); Lpron, 3.2 ± 0.09 (3.1–3.28); awpron, 3.18 ± 0.29 (2.85– 3.41); pwpron, 3.18 ± 0.18 (3.47–3.84); wpron, 4.38 ± 0.14 (4.21–4.46); LFIII, 14.15 ± 0.17 (13.95–14.25); wFIII, 3.5 ± 0.08 (3.45–3.6); LTIII, 14.7 ± 0.45 (14.25–15.15); Ltars 1-III, 3.55 ± 0.08 (3.45–3.6); OL, 13.65 ± 0.15 (13.5–13.8).


Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo


University of the Basque Country














Eidmanacris bidentata Sperber, 1998

Nihei, Silvio S. 2017

Eidmanacris bidentata Sperber, 1998 in Mesa, Sperber & Garcia, 1998 : 45

Mesa 1998: 45

Eidmanacris bidentata

Zefa 2010: 53