Gibocercus chaco Szumik, 1997, 1998

Pereyra, Veronica, 2017, Gibocercus Szumik and Biguembia Szumik (Embioptera, Archembiidae): new species and the potentiality of female traits, Zootaxa 4317 (2), pp. 338-354 : 348

Gibocercus chaco Szumik, 1997

( FigureS 5 , 15 )

Gibocercus chaco Szumik, 1997: 143 ; Ross, 2001: 36 (genus composition); Szumik, 2004: 230 (phylogeny); Szumik et al., 2008: 1003 (phylogeny) description of the female for the first time.

Description of the female. General coloration in dorSal View blackiSh brown, Ventral View brown; tarSi, membranouS areaS and cerci tipS orangiSh brown. AntennomereS 1‒22 brown, antennomereS 23 and 24 half brown and half without color, antennomereS 25‒30 whitiSh. Head in dorSal View with two diffuSe, unpigmented SpotS.

Total length 20.35 mm. Head width/length = 0.97, OR = 0.81. Bladder on medial tarSal Segment of hind leg with conSpicuouS microtrichia on anterolateral Side. BaSitarSuS of hind leg broad ( Fig. 15 ): length 0.67 mm, width/ length = 0.46, medial bladder diameter/ baSitarSuS width = 0.45; both bladderS well deVeloped; 3 rowS of Setae on retrolateral face, 6 rowS on anterolateral face, 6 rowS on VentrobaSal face, 18–20 Setae between bladderS on retrolateral face ( Fig. 15 ).

Apical cerci Shorter than baSal cerci. Ninth Sternite browniSh with a diffuSe longitudinal yellowiSh band; medial plate (8°S) orangiSh yellow, 1° and 2° VfS browniSh, tip of 1°VlfS whitiSh; medial plate clearly differentiated from the 1°VlfS ( Fig. 5 ), caudal margin of medial plate with a Small notch, 1°VfS hyperdeVeloped ( Fig. 5 ); 2°VlfS a broad band more or leSS Sclerotized. Secondary gland coVered by 2°VlfS.

Biology. NetS made by G. chaco were found in litter below Bromelia Sp. or fallen trunkS, in the biogeographic area iS known aS Dry Chaco. AlmoSt all of the SpecimenS collected in 1997 and 2000 were maintained in culture to obtain a good Sample of adult maleS and femaleS. DeVelopment time from egg to adult waS 320 to 380 dayS.

Additional records. Argentina: Salta, LomaS de Olmedo, 5 Km E Cruce RP5 and RP13, -23.815583 - 64.015111, 28-IV-2007, Szumik, Rajmil, Cuezzo, 27 maleS, 10 femaleS, 11 juVenileS, IFML ; Santiago del EStero, 23 Km NW Km346 RN16, -25.969408 -61.9694306, 17-XII-2000, 2 maleS, 2 femaleS, Szumik, IFML .

Figures

FIGURES 5 – 7. Female terminalia. 5. Gibocercus chaco; 6. Gibocercus beni; 7. Biguembia copo.

FIGURES 15 – 17. Female hind basitasus. 15, Gibocercus chaco; 16, Gibocercus beni; 17, Biguembia copo.