Xestoblatta vera Rocha e Silva Albuquerque & Fraga, 1975

Silva-da-Silva, Luiz Rafael & Lopes, Sonia Maria, 2016, A new species of the Xestoblatta surinamensis group from Amazonia, northern Brazil, with redescriptions of X. amaparica, X. surinamensis and X. vera (Blattodea: Ectobiidae), Zoologia (e 20160041) 33 (6), pp. 1-9 : 5-8

Xestoblatta vera Rocha e Silva Albuquerque & Fraga, 1975

Figs. 35-47

Diagnosis. General coloration yellowish-brown ( Fig. 35 ). Head pale yellow; vertex yellowish, interocular space slightly pigmented, frons with transverse dark-brown mark linking antennal insertions between antennae; clypeus with dark marks, labrum dark brown ( Fig. 36 ). Pronotum glossy brown, with two symmetrical black marks on medio-basal region and two small narrow dark-brown marks in medio-apical region; central disk inconspicuous ( Fig. 37 ). Antennae brown, basal segments paler, similar to head coloration. Maxillary palp yellowish. Ocelli whitish. Legs yellowish, apex of coxae brown; spines brown, pulvilli white, arolia brown. Tegmen brownish-yellow and glossy, with hyaline marginal field. Tergite yellowish-brown, sternite yellowish-brown with marks on segments I-VII.

Dimensions (in mm). Total length: 22.4; length of pronotum: 4.2; width of pronotum: 5.4; length of tegmen: 18.6; width of tegmen: 4.3.

Redescription. Head oval-triangular, interocular space narrow, 0.5 mm, slightly less than half distance between antennal bases. Ocelli small and inconspicuous. Vertex slightly exposed.

Thorax. Pronotum slightly convex, with slight angulation on posterior margin, maximum width in medio-basal region, with deflexed lateral flaps. Legs robust and densely spiny with large coxae; femur I with anteroventral surface bearing row of 13 long spines gradually decreasing in size apically, and ending in three long apical spines. Posteroventral surface with five equally spaced spines, the last apical. Pulvilli, arolia and claws moderately developed. Tegmen well-developed, well exceeding apex of cerci. Marginal field slightly deflexed, narrow. Discoidal field rounded. Scapular field ample. Anal field straight. Subcostal vein long and sinuous, about 20 radial sectors, with apical sector ramified. Wing with three complete rami on cubital vein; apical triangle small but conspicuous. Four complete auxiliary veins.

Abdomen. Tergal modification on tergite VII shaped as wide central depression, slightly rounded, partially covered by anterior tergite ( Fig. 38 ). Subgenital plate asymmetrical, ciliated marginally, with styles differentiated in size, inserted mediodistally; margin of subgenital plate setose. Left style (ventral view) lobulate with long slender apical projection; right stylus (ventral view) simple, conical, with long setae ( Fig. 39 ). Supra-anal plate triangular, projected between cerci, with median notch between cerci bearing 15 segments ( Fig. 40 ). Right paraproct with slender bifid sclerotized structure and with a third curved structure bearing two sclerotized spines at apex ( Fig. 41 ). Left paraproct single, rhomboid, with apex curved and bearing four small sclerotized spines ( Fig. 42 ). Left phallomere sclerotized (L3), hook-shaped with apical concavity ( Figs. 43-44 ). Median sclerite (L2vm) slender with spiny projection distally; apex slightly sclerotized and apical-lateral projection lobulate (Figs. 45-46). Right phallomere (R3) slightly sclerotized, with slender projection ending in two sclerotized spines ( Fig. 47 ).

Material examined. Holotype male. BRAZIL, Mato Grosso: Vera municipality, 1973, Alvarenga & Roppa leg. ( MNRJ) .

Remarks. ROCHA E SILVA-ALBUQUERQUE & FRAGA (1975) considered this species to be similar to X. ecuadorana Gurney, 1939 in the shape of the subgenital plate. However, our observations indicate that it is similar to X. surinamensis in the shape of the subgenital plate and paraprocts with four small sclerotized spines.

Figures

Figures 35-47. Xestoblatta vera, paratype male: (35) habitus, dorsal view, length 22.4 mm; (36) head, ventral view; (37) Pronotum, dorsal view; (38) Tergal modification of the tergite VII, dorsal view; (39) Subgenital plate, ventral view; (40) Supra anal plate, dorsal view; (41) Left paraproct, dorsal view; (42) Right paraproct, dorsal view; (43) Left phallomere (L3), dorsal view; (44) Apex of left phallomere, dorsal view; (45) median esclerite (L2vm), dorsal view; (46) Apex of mediam sclerite, Scale Bar:0,4mm; (47) Right phallomere (R2), dorsal view. Scale bars: 36 = 1.5 mm, 37 = 3.5 mm, 38 = 3.0, 39 = 1.3 mm, 40 = 1.5 mm, 41, 45, 47 = 1.0 mm, 42 = 0.5 mm, 43 = 0.5 mm, 44 = 0.3 mm, 46 = 0.4 mm.