Eidmanacris fusca Desutter-Grandcolas, 1995

Nihei, Silvio S., 2017, Taxonomic review of Eidmanacris Chopard, 1956 (Orthoptera: Grylloidea: Phalangopsidae), Zootaxa 4321 (1), pp. 1-93 : 24-28

Eidmanacris fusca Desutter-Grandcolas, 1995

( Figs. 15–17 )

http://lsid.speciesfile.org/urn:lsid: Orthoptera .speciesfile.org:TaxonName:28462

Eidmanacris fusca Desutter-Grandcolas, 1995: 466 (male description). Type locality: Brazil, state of Rio Grande do Sul, municipality of Aratinga ( Serra Geral ).

Material Examined. Total: 22 males and 6 females. 21 males and 5 females labeled: “BR, SC, URUBICI, 02– 05.XII.2011, DIAS, P. G. B. S. col.” ( IBUSP). 1 male and 1 female labeled: “ Brasil, Sta Catarina, 20 Km. S.E. de São Bentos do Sul, 31-XII-76, A. Mesa, R. Cohn.” ( UBTU). All specimens preserved in ethanol 80%.

Diagnosis. This species can be distinguished from other Eidmanacris by the following characters: general coloration dark brown; metanotal gland absent, with two whitish, rounded and inflated structures; TIII subapical spurs yellowish, with central, dark brown bands; apex of pseudepiphallic rounded distally, superior and superointernal projections reduced to a spine, inferior projection well developed in lateral view. PsP2 apex trifid, two projections curved inwards, the third elongate, down curved and apically pointed in lateral view; PsP1 robust, curved inwards in ventral view, pointed distally, enlarged anteriorly; copulatory papilla rounded laterally, posterior margin rounded with a central concavity well discernible in dorsal and ventral views, large anterior concavity in ventral view.

Redescription. Head. Dark brown ( Figs. 15A, B, C ). Occiput dark brown with central maculae light brown; vertex with three stripes light brown, longitudinal ( Fig. 15C ). Fastigium dark brown with two rows of bristles, as long as wide, slightly narrowed toward at apex, narrower than scape, separated from vertex by transverse line almost no discernible ( Fig. 15C ). Frons dark brown, with central triangle medium to dark brown ( Fig. 15A ). Three ocelli present, well developed, laterals rounded, central oval ( Figs. 15A, B, C ); eye with unpigmented area on supero-internal angle ( Fig. 15A, C ). Maxillary palpi dark brown, long, thin; joints 3, 4 and 5 almost same-sized, dark brown, distal portion whitish; apex of joint 5 upcurved ( Fig. 15G ). In frontal view, gena dark brown ( Fig. 15A ); in lateral view, gena dark brown, posterior margin light brown ( Fig. 15B ). Frontoclypeal suture dark yellow. Clypeus upper margin dark brown, lower margin light brown; labrum whitish, apex light brown ( Fig. 15A ). Mandible dark brown with light brown maculae. Antennal scape dark brown, light brown longitudinal stripe on outer surface ( Fig. 15A ); antenomeres dark brown, with two whitish bands, the first composed of c.a. 11 antenomeres, second larger composed of c.a. 20 antenomeres

Thorax Pronotum DD dark brown, wider than long, inflated, slightly pubescent, divided by thin light brown vertical line; DD cephalic margin slightly concave, caudal margin almost straight ( Fig. 15C ); ventro-cephalic angle broadly rounded, ventral margin gradually ascendant, ( Fig. 15B ).

Legs. FI and II dark brown. TI dark brown; TII dark brown, annulated with medium brown. TI with two samesized apical spurs; TII with two inner same-sized spurs, one outer, smaller. FIII medium to dark brown, with several dark brown stripes, apical part dark brown ( Fig. 15F ). TIII yellowish brown, apically dark brown; subapical spurs 4/4, spurs yellowish, centrally dark brown banded; apical spurs 3/3, more developed on inner surface; inner apical spurs: median (iam) and dorsal almost same sized but slightly bigger (iad), ventral smallest (iav) (iad>iam>iav); outer apical spurs: median (oam) and dorsal almost same sized but larger (oad), ventral smallest (oav) (oad>oam>oav). Basitarsi I, II and III dark yellowish.

Abdomen. Dark brown, sub-cylindrical, pubescent, divided by thick sagittal line light brown, almost no discernible ( Fig. 15D ).

Male. Body large, general coloration dark brown. FWs dark brown, short, covering metanotal gland area, not surpassing metanotal posterior margin, outer margins medium brown, apex connected to single vein that divides outer part of FW as lateral field, reticulated; inner margins touching each other ( Fig. 15C ). Metanotal gland absent, apparently vestigial, with two structures whitish, rounded and inflated ( Figs. 15H, I ). Supra-anal plate medium brown, posterior margin dark brown; anterior margin slightly concave, posterior margin slightly concave, composed of lateral-distal projections very short ( Fig. 15J ). Subgenital plate dark brown, as long as wide, laterally pubescent, central maculae greyish, anterior margin almost straight, posterior margin with central, small invagination ( Fig. 15K ).

Phallic complex ( Figs. 16A–C ; 17A–C). Pseudepiphallus: base of pseudepiphallic sclerite centrally narrow; pseudepiphallic arms sclerotized, hard, apex upcurved; apex of pseudepiphallic arm without bristles, curved inwards (more than 90°), bifid, distally rounded, forming superior and internal projection-like spines; inferior projection well developed, elongated, apex pointed in lateral view; anterior projection of pseudepiphallic sclerite short, pointed, down curved, not surpassing median part of pseudepiphallus in dorsal and lateral views; PsP2 sclerotized, elongate in lateral view, not surpassing posterior extremity of pseudepiphallic arms; apex trifid, two projections pointed inwards, other long, down curved, pointed apically in lateral view, apparently without membranous sphere on inner surface; sclerite A connected in base of pseudepiphallic arm, straight, articulation with PsP2 visible; PsP1 sclerotized, robust, short, curved inwards in ventral view, distally pointed, anteriorly enlarged. Ectophallic invagination: ectophallic apodeme somewhat long, anteriorly thin, dorso-ventrally flattened in lateral view; ectophallic arc short, located posteriorly to base of pseudepiphallic sclerite in dorsal and ventral views; dorsal projection short, sclerotized, with posterior concavity, not surpassing PsP 2 in dorsal view; ventroposterior projection not so elongate. Endophallus: median-posterior projection elongated, apex reaching PsP2 apex; lateral-posterior lobes of endophallic sclerite very short; endophallic apodeme laterally flattened, wider than long, upcurved in lateral view, the limits not surpassing ectophallic apodeme.

Female. Larger than male, general coloration dark brown ( Fig. 15E ). Maxillary palpi dark brown Thorax and abdomen dark brown, with a thin, light brown sagittal line, almost no discernible. Supra-anal plate medium brown, anterior margin slightly concave, posterior margin darker, somewhat rounded with not so long bristles ( Fig. 15L ). Subgenital plate medium to dark brown, anterior margin light brown, posterior margin with central concavity ( Fig. 15M ). Ovipositor as in figs. 15N and 15O.

Copulatory papilla ( Figs 17D–F ). Sclerotized, wider than long, laterally rounded, posterior margin rounded with a central, well discernible concavity in dorsal and ventral views, anterior concavity large in ventral view.

Remarks. This species is possibly the one mentioned as "new species of Eidmanacris " in de Mello (2007), based on the authors’ description of the spermatophore and copulatory papilla.

Mesurements (mm). Male (n=10): Hw, 3.41 ± 0.06 (3.28–3.53); iod, 1.69 ± 0.13 (1.48–1.86); Lpron, 3.89 ± 0.18 (3.65–4.15); awpron, 3.45 ± 0.17 (3.22–3.72); pwpron, 3.7 ± 0.22 (3.28–4.03); wpron 5.07 ± 0.2 (4.65–5.33); LFW, 2.02 ± 0.12 (1.86–2.17); wFW, 1.95 ± 0.12 (1.67–2.1); LFIII, 17.13 ± 0.67 (16.5–18.3); wFIII 3.36 ± 0.18 (3–3.6); LTIII, 18,61 ± 0.83 (17.25–19.5); Ltars 1-III, 5.02 ± 0.28 (4.35–5.4).

Female (n=5): Hw, 3.42 ± 0.10 (3.28–3.53); iod, 1.66 ± 0.05 (1.61–1.73); Lpron, 3.69 ± 0.09 (3.59–3.84); awpron, 3.31 ± 0.18 (3.1–3.59); pwpron, 3.79 ± 0.11 (3.59–3.9); wpron, 4.87 ± 0.16 (4.71–5.08); LFIII, 16.5 ± 0.63 (15.9–17.4); wFIII, 3.54 ± 0.13 (3.45–3.75); LTIII, 17.43 ± 0.66 (16.8–18.45); Ltars 1-III, 4.74 ± 0.17 (4.5–4.95); OL, 18.69 ± 0.88 (18–19.8).

Figures

FIGURE 15. Eidmanacris fusca Desutter-Grandcolas. Non-type. A — male head, frontal; B — male head, pronotum and FW, lateral; C — male head, pronotum and FWs, dorsal; D — male abdomen, dorsal; E — female habitus; F — posterior femur; G — maxillary palpi; 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 16. Eidmanacris fusca Desutter-Grandcolas. Non-type. Male phallic complex: A — dorsal; B — ventral; C — lateral. Scale bar: 0.5 mm.

FIGURE 17. Eidmanacris fusca Desutter-Grandcolas. Non-type. Male phallic complex: A — dorsal; B — ventral; C — lateral. Female copulatory papilla: D — dorsal; E — ventral; F — lateral. Scale bar: 0.5 mm.