Hygronemobius guriri Pereira, Martins & Miyoshi

Pereira, Marcelo Ribeiro, Miyoshi, Akio Ronaldo, Martins, Luciano De Pinho, Fernandes, Maria Luiza, Sperber, Carlos Frankl & Mesa, Alejo, 2013, New Neotropical species of Hygronemobius Hebard, 1913 (Orthoptera: Grylloidea: Nemobiinae), including a brief discussion of male genitalia morphology and preliminary biogeographic considerations of the genus, Zootaxa 3641 (1), pp. 1-20 : 12-16

Hygronemobius guriri Pereira, Martins & Miyoshi sp. n.

urn:lsid:zoobank.org:act:53D945C2-30EC-40ED-B591-E5FD1E59D0AC ( Figs. 6 , 7 , 8 A and C)

Etymology. The specific epithet refers to Guriri Island, São Mateus Municipality, terra typica of the species.

Type. Holotype, male, Brazil, ES, municipality of São Mateus, Guriri Island/transition forest/Muriricu river, 22.xii.1996 (C. F. Sperber leg.).

Diagnosis. This species may be distinguished from the other species of Hygronemobius by the following combination of characteristics: (i) male genitalia with distal portion rectangular and proximal portion trapezoidal ( Fig. 7 A,B); (ii) pseudepiphallic sclerite weakly sclerotized, longer than wide and with a cleft, visible in dorsal view ( Fig. 7 B), (iii) endophallic sclerites arranged in a shell shape with end of lateral sclerites directed towards ventral side, visible in ventral view ( Fig. 7 A) and (iv) latero-inferior lobes dark brownish with two light yellowish spots aligned in a semi-parabola shape on anterior portion ( Fig. 6 B,F).

Description. Holotype, male, measurements (mm): BL 6.00; ID 0.78; LP 1.22; WP 1.68; LF 3.56; LT 2.80; TL 2.53; TW 2.15. Head covered with semi erect long black bristles from vertex middle line to central portion of frons, presence of fine and short light brown bristles covering all its extension; general coloration dark yellowish with vertex showing five light brownish stripes, being two lateral ending on eyes posterior margins, and three central, ending on superior margin of central and lateral ocelli; black eyes; three ocelli present, central ocellus surrounded by dark brown spots, lateral ocelli surrounded on latero-internal margin by one dark brownish stripe; antennal scape light yellowish with an irregular light brownish spot; antennomeres light brownish; gena light yellowish; clypeus light brownish with distal margins whitish; labrum dark brownish with two central light whitish spots on proximal portion and one on distal portion; mandibles light brownish; maxillary and labial palpi whitish with truncate apex; last palpomere of each maxillary palpi with one light brownish ring on distal margin that covers the entire ventral surface. Thorax with pronotum light yellowish adorned with diffuse dark brownish spots, presence of fine and short black bristles covering all its extension; longitudinal midline of pronotum with two light yellowish spots close to its anterior margin and two light yellowish spots at each side of midline close to the posterior margin of pronotum, being one drop-shaped and the other triangular; latero-inferior lobes dark brownish with two light yellowish spots aligned in a semi-parabola shape on anterior portion; some diffuse black bristles covering lateral lobe; row of long black bristles present on anterior and posterior pronotum border. Tegmina ( Fig. 6 D) light brownish with a longitudinal light yellowish stripe covering veins Cu1, M and a half of the harp; a light yellowish stripe covering the veins 1A and 2A reaching the junction of Cu2, 1A, 2A and 3A; a light yellowish spot covering the proximal junction of veins 1A and 2A and another covering the junction of Cu2, 1A and 2A on the distal margin of cordal area. Hindwings absent. Prosternum light yellowish on anterior margin to dark brownish on posterior margin, mesosternum dark brownish on anterior margin, to light yellowish on posterior margin, metasternum light brownish with a fine light yellowish stripe on lateral margin. Fore and middle legs with similar pattern: coxa and trochanter light yellowish with indistinct dark brownish spots; femur light yellowish, with light brownish spots; tibia with light brownish rings separated from each other by a light yellowish area; sparse strong black bristles covering femur and tibia surface; tympanum present on the fore tibia; first tarsomeres with two light brownish rings separated from each other by a light yellowish area, second and third tarsomeres light brownish. Hind leg femurs light yellowish with light brownish strips on dorsal and outer surface, sparse black bristles on dorsal and ventral portion; tibia light yellowish with some light brownish spots, three inner and three outer dorsal spurs, two inner and three outer apical spurs; first and second tarsomeres light yellowish with one light brownish ring on distal margin, third tarsomeres light yellowish on proximal portion, to light brownish on distal margin. Abdomen with tergites I–X dark brownish, tergite IV and V with one light brownish central spot on basal margin, tergites VII–VIII with two semicircular light brownish spots on each side of the midline, tergites IX and X with a little central spot light brownish. Supra-anal plate dark brownish on central, to light brownish on lateral margins. Sternite I light brownish on anterior margin to light yellowish on posterior margin, sternite II with lateral margins light yellowish, sternites III–VIII dark brownish with a light yellowish narrow stripe on posterior margin connecting the two laterals spots. Subgenital plate dark brownish with all angles rounded. Cerci dark brownish on proximal margin, to light brownish on distal margin. Male genitalia in paratypes: male genitalia with distal portion rectangular shaped and proximal portion with trapezium shaped ( Fig. 7 A); apical lobes sub-straight, setaceous, weakly sclerotized and showing a short invagination, visible in ventral and dorsal view ( Fig. 7 A,B); ends of apical lobes directed towards ventral side, visible in lateral view ( Fig. 7 C); pseudepiphallic sclerite weakly sclerotized, longer than wide and with a cleft, visible in dorsal view ( Fig. 7 B). Ectophallic fold curved in a half disc format, visible in lateral view ( Fig. 7 C). Ectophallic apodeme not crossing or surpassing the rami, when in ventral and dorsal view ( Fig. 7 A,B). Endophallus divided in three sclerites, being one central and two lateral ( Fig. 7 A); endophallic sclerites arranged in the shell shape with end of lateral sclerites directed towards ventral side, visible in ventral view ( Fig. 7 A). Female: body shape very similar to male, showing only the following differences: tegmina reduced to lateral scales. Tergite I totally dark brownish, tergites II–IV with a dark brownish narrow stripe at base, lateral portions dark brownish; tergite II with a dorsal portion light yellowish, punctuated by short dark brownish spots being the biggest one at midline; tergites III and IV similar to II, but with no central spot; tergites V–VI dark brownish with diffuse light brownish spots; tergite VII dark brownish with two light yellowish spots closed to midline; tergites VIII–X with central light yellowish stripe. Supra-anal plate light brownish, rounded with light yellowish spots on lateral portions. Sternite I light brownish, sternite II–VI light brownish with two lateral spots, sternite VII light brownish with a light yellowish narrow stripe on posterior margin connecting the two laterals spots. Ovipositor with superior valves dark brownish on proximal portion to light brownish on distal portion and inferior valves light yellowish on proximal and median portion to light brownish on distal portion ( Fig. 6 F).

Remarks. Stridulatory file in paratype with 56 teeth (n=1).

Measurements (mm). Males (n=4, including holotype). BL 5.38–6.00 (5.69 ± 0.44); ID 0.76–0.78 (0.78 ± 0.01); LP 1.10–1.22 (1.18 ± 0.06); WP 1.56–1.68 (1.63 ± 0.05); LF 3.56 – 3.66 (3.61 ± 0.07); LT 2.78–2.80 (2.79 ± 0.02); TL 2.53–2.98 (2.68 ± 0.25); TW 2.00–2.68 (2.28 ± 0.35). Females (n=2). BL 5.13–6.00 (5.56 ± 0.62); ID 0.81–0.85 (0.83 ± 0.02); LP 1.31–1.42 (1.36 ± 0.08); WP 1.68–1.69 (1.69 ± 0.01); LF 3.60–3.80 (3.70 ± 0.14); LT 2.95–3.05 (3.00 ± 0.07); OL 2.96–3.00 (2.98 ± 0.03).

Occurrence. São Mateus and São José Municipalities, state of Espírito Santo, Brazil.

Material examined. Paratypes: 1 female, same holotype data; 3 males and 1 female, Brazil, ES, São Mateus Municipality, Guriri Island/transition forest/mangrove-Restinga/litter/Quin-Quin farm/Muriricu river, 22.xii.2002 (C. F. Sperber leg.).

Figures

FIGURE 6. Hygronemobius guriri sp. n. A – C: male holotype (dorsal, lateral and ventral view; B: latero-inferior lobe of pronotum detailed in the upper right); D: male paratype, dorsal view of right tegmen; E – G: female paratype (dorsal, lateral and ventral view).

FIGURE 7. Male genitalia of Hygronemobius guriri sp. n. A— ventral view, B— dorsal view and C— lateral view. Abbreviations: Ps. A. L—pseudepiphallic apical lobe; Ps. M. L—pseudepiphallic median lobe; Ps. P—pseudepiphallic parameres; Ps. S—pseudepiphallic sclerite; End. Cv—endophallic cavity; Ect. F—ectophallic fold; Ect. Ap—ectophallic apodeme; End. Sc—endophallic sclerite; End. Ap—endophallic apodeme.

FIGURE 8. Distribution map for Hygronemobius species. H. albipalpus (solid black lozenge), H. albolineatus (solid star), H. alleni (solid black circle), H. amoenus (empty star), H. basalis (empty triangle with central solid circle), H. benoisti (empty circle with central solid circle), H. boreus (solid green circle), H. daphne (solid red triangle), H. darienicus (solid black square), H. diplagion (empty cross), H. dissimilis (solid red square), H. elegans (empty square with central “ x ”), H. epia (empty square with central solid circle), H. guriri sp. n. (solid orange square), H. histrionicus (solid black triangle), H. indaia sp. n. (solid green triangle), H. iperoigae sp. n. (half black and white circle), H. liura (empty circle with internal cross), H. longespinosus (‘ x ”), H. minutipennis (empty circle with internal triangle), H. nanus (empty circle with internal “ x ”), H. nemoralis (solid orange circle), H. nigrofasciatus (solid asterisk), H. speculi (solid blue circle), H. stellatus (empty circle), H. tetraplagion (solid cross), H. torquatus (empty asterisk). The question mark indicates the unknown location of H. araucanus in Chile.