Eidmanacris minuta (de Mello, 1990 ) Nihei, 2017

Nihei, Silvio S., 2017, Taxonomic review of Eidmanacris Chopard, 1956 (Orthoptera: Grylloidea: Phalangopsidae), Zootaxa 4321 (1), pp. 1-93 : 49-53

Eidmanacris minuta (de Mello, 1990) comb. nov.

( Figs. 33–35 )

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:499164

Endophallusia minuta de Mello, 1990: 146 . Type locality: Brazil, state of Rio de Janeiro, municipality of Teresópolis. Endophallusia minuta, De Domenico, 2005: 72 (collection list).

Type material examined. Total: 1 male paratype, 1 female paratype, labeled: “ BRASIL, RJ, Teresópolis , Faz. Revolta, 01/viii/1989, F.A.G. Mello col.” ( MZSP). Specimens preserved in ethanol 80%.

Other material examined. Total: 4 males, 2 females, labeled: “ BRASIL, RJ, Teresópolis, Faz. Revolta, 01/ viii/1989, F.A.G. Mello col.” ( UBTU). Specimens preserved in ethanol 80%.

Diagnosis. This species can be distinguished from other Eidmanacris by the following characters: antennae with a median band composed of about 6 antenomeres whitish; median crest of metanotal gland with cluster of bristles, two lateral-posterior projections; lateral projections elongate, cylindrical, slightly curved inwards; PsP2 with anterior half bifid, one part curved inwards, the other the longest and curved outwards.

Redescription. Head. Light to medium brown. Occiput and vertex medium brown, laterally dark, with three vertical, light brown lines in dorsal view ( Fig. 33C ). Fastigium light brown, with two rows of bristles, slightly longer than wide, slightly narrowed toward apex, separated from vertex by line forming “v” ( Fig. 33C ). Frons light to medium brown, with three vertical bands medium brown, two below eye, other above clypeus ( Figs. 33A, B ). Three ocelli present, well developed, forming isosceles triangle, central flattened at bottom, lateral rounded ( Figs. 33A, B, C ). Eyes with unpigmented small area on supero-internal angle ( Fig. 33C ). Maxillary palpi, long, thin, slightly pilose, light brown, distal portion of joints whitish; joints 3–5 almost same-sized ( Fig. 33H ); apex of joint 5 upcurved. Gena light brown ( Fig. 33B ). Frontoclypeal suture yellowish brown; clypeus light brown, laterally dark; labrum whitish, lower part yellowish brown. Mandible medium brown. Antennal scape light brown, inner margin medium brown ( Fig. 33A ); antenomeres medium brown, with median band with c.a. 6 antenomeres whitish.

Thorax. Pronotum DD wider than long, medium brown, lateral-anterior region with dark spots, slightly pubescent, inflated, divided by very tiny light brown sagittal line ( Fig. 33C ); DD cephalic margin sub-straight, caudal margin slightly concave ( Fig. 33C ); lateral lobes dark brown, ventro-cephalic angle rounded, ventro-caudal margin gradually ascendant ( Fig. 33B ).

Legs. FI and II dark yellow, annulated with medium brown. TI and II dark yellow, TI with two same-sized apical spurs; TII with two inner apical spurs and one outer, smaller. FIII yellowish brown, with thin stripes light to medium brown on outer surface dorsal margin, apical third medium brown ( Fig. 33 F ). 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: dorsal (iad) longer than median (iam), ventral smallest (iav) (iad>iam>iav); outer apical spurs: dorsal one longer (oad), median smaller (oam), ventral smallest (oav) (oad>oam>oav). Basitarsi I, II and III yellow.

Abdomen. Sub-cylindrical in dorsal view, pubescent, medium to dark brown, marbled, divided by thin light brown sagittal line almost no discernible ( Fig. 33D ).

Male. Small-sized body, general coloration medium brown, with spots and maculae medium brown. FWs medium brown, apically dark, short, apex rounded; posterior part of inner margin and apex connected to single vein that divides external part of FW as lateral field, glandular thickening absent distally ( Fig. 33C ); inner margins touching each other; FWs covering metanotal gland, not surpassing metanotum posterior border ( Fig. 33B, C ). Metanotal gland present, anteromedian crest with cluster of bristles, two lateral-posterior projections; lateral projections elongate, cylindrical, slightly curved inwards; posterior portion of metanotum with bristles ( Figs. 33H, I ). Supra-anal plate light brown, slightly pubescent; anterior margin slightly concave, lateral-posterior projections shorter than posterior margin, yellowish, posterior margin sub-straight ( Fig. 33J ). Subgenital plate longer than wide, with lateral pubescence, laterally medium brown and centrally lighter; anterior margin almost straight, posterior margin rounded ( Fig. 33K ).

Phallic complex ( Figs. 34A–C ; 35A–C). Pseudepiphallus: central portion of base of pseudepiphallic sclerite narrow in dorsal view; pseudepiphallic arms sclerotized, upcurved in lateral view; apex of pseudepiphallic arm with few bristles, curved inwards forming 90° angle; superior projection sclerotized, tip rounded, internal projection rounded, inferior projection short, apex pointed; anterior projection of pseudepiphallic sclerite long, surpassing base of pseudepiphallic sclerite in lateral view; PsP2 hardly sclerotized, thin, surpassing posterior extremity of pseudepiphallic arms, anterior half bifid, one part curved inwards, other curved outwards, longer; apex pointed in lateral view, apparently without membranous sphere on inner surface; sclerite A connected with base of pseudepiphallic sclerite, curved inwards, articulated with PsP2, without visible connection sclerite A and PsP2; PsP1 short, well sclerotized, apex rounded in ventral view. Ectophallic invagination: ectophallic apodeme longer than pseudepiphallic sclerite; ectophallic arc located posteriorly to base of pseudepiphallic sclerite in dorsal view; ventro-posterior projection elongate, apex curved outwards; dorsal projections sclerotized, very short; ectophallic fold membranous, sub-apical lateral area inflated. Endophallus: median-posterior projection of endophallic sclerite elongate, not surpassing PsP2 apex; lateral-posterior lobes of endophallic sclerite short; endophallic apodeme wider than long, flattened laterally, not reaching apex of ectophallic apodeme.

Female. Larger than male, general coloration similar ( Fig. 33E ). Supra-anal plate medium brown, posterior border dark, anterior margin concave, posterior margin rounded with long bristles ( Fig. 33L ). Subgenital plate light to medium brown, wider than long, anterior margin sub straight, posterior margin rounded ( Fig. 33M ). Ovipositor as in figs. 33N, O.

Copulatory papilla ( Figs. 35D–F ). Sub-triangular, dorso-ventrally flattened in lateral view, anterior margin membranous, posterior margin unpigmented.

Measurements (mm). Male (n=1): Hw, 2.17; iod, 1.17; Lpron, 2.04; awpron, 2.23; pwpron, 2.48; wpron 2.79; LFW, 1.24; wFW, 1.17; LFIII, 10.05; wFIII, 2.55; LTIII, 8.85; Ltars 1-III, 2.25.

Female (n=1): Hw, 2.41; iod, 1.3; Lpron, 2.29; awpron, 2.97; pwpron, 2.35; wpron, 3.16; LFIII, 9; wFIII, 2.7; LTIII, 8.85; Ltars 1-III, 2.25; OL, 8.55.

Figures

FIGURE 33. Eidmanacris minuta (de Mello). Paratypes. A — male head, frontal; B — male head, pronotum and FW, lateral; C — male head, pronotum and FWs, dorsal; D — male abdomen; E — female habitus; F — posterior femur; G — maxillary palpus; H — male metanotum, dorsal; I — male metanotum, lateral; J — male supra anal plate; K — male subgenital plate; L — female supra anal plate; M — female subgenital plate; N ovipositor dorsal; O — ovipositor ventral. Scale bar: A – F: 2 mm; G – O: 1 mm.

FIGURE 34. Eidmanacris minuta (de Mello). Paratype. Male phallic complex: A — dorsal; B — ventral; C — lateral. Scale bar: 0.5 mm.

FIGURE 35. Eidmanacris minuta (de Mello). Paratypes. Male phallic complex: A — dorsal; B — ventral; C — lateral. Female copulatory papilla: D — dorsal; E — ventral; F — lateral. Scale bar: 0.5 mm.