Poeciloderrhis itatiaiensis, Silva & Lopes, 2018

Silva, Leonardo de Oliveira Cardoso da & Lopes, Sonia Maria, 2018, Six new species of Poeciloderrhis from Brazil (Blattaria: Blaberidae) with a new record and a new combination, Zoologia (e 12483) 35, pp. 1-10 : 6

Poeciloderrhis itatiaiensis sp. nov.

http://zoobank.org/ 45E3900F-74B1-40B7-AD54-01C63F3DAEEA

Figs 40–49

Diagnosis. General coloration. Light brown, shiny ( Fig. 40). Head with brown front; interocular, interocellar and interantennal spaces brown. Eyes black ( Fig. 41). Pronotum light brown, semi-transparent, with dark brown punctuations ( Fig. 42). Tegmen light brown, semi-transparent with dark brown spots. Legs light brown, with spines, pulvilli, arolia and claws brown. Abdomen brown.

Dimensions of holotype male (mm). Total length: 48.9; length of pronotum: 7.6; width of pronotum: 9.7; length of tegmen: 42.6; width of tegmen: 10.0.

Description of the male holotype. Head triangular with rounded corners, vertex slightly exposed in dorsal view; interocular space about 1.22 mm. Maxillary palps with first and second segments reduced and fifth segment slightly densely tomentose.

Thorax. Pronotum ample, convex, curved angles, base with small median projection. Legs with femur I with anteroventral surface bearing 4–6 strong spines followed by series of small spines toward apex, apex with two strong apical spines; posteroventral surface with two or three strong spines, one apical; femora II and III bearing few strong spines on their ventral surfaces. Pulvilli present on all four tarsal segments, claws symmetrical and specialized, with two rows of small teeth, similar to spines on legs. Tegmen surpassing apex of abdomen. Marginal field wide, slightly concave, scapular field elongated with oblique venules, discoidal field convex, curved apically, anal field convex and conspicuous.

Abdomen. Tergal modification consisting of three transverse humps with cilia on hump closest to base, base of first segment with circular recess, base of second segment with arcuate hump ( Fig. 43). Supranal plate with cerci surpassing size of plate; cerci with ventral cilia ( Fig. 44). Subgenital plate asymmetric, left style, in dorsal view, larger than right ( Fig. 45). Left phallomere sclerotized ( Fig. 46). Median sclerite triangular, apex markedly sclerotized ( Figs 47 and 48). Right phallomere with curved, club-shaped apex, bearing spines near apex ( Fig. 49).

Material examined. Holotype male, BRAZIL, Rio de Janeiro State, Itatiaia, Parque Nacional de Itatiaia , 750 m, 04-IV-1960, Gouvêa col. ( MNRJ).

Etymology. The species name itatiaiensis is derived from the locality where the species was collected Itatiaia.

Remarks. Poeciloderrhis itatiaiensis sp. nov. might be distinguished from Poeciloderrhis verticalis (Burmeister, 1838) by its larger size 48.9 mm (36.8–38.8 mm in P. verticalis ), tergal modification consisting of three transverse humps with cilia on hump closest to base, base of first segment with circular recess, base of second segment with arcuate hump in P. itatiaiensis sp. nov., while in P. verticalis the tergal modification have an elevation at the middle of first segment followed by two lateral elevations at the lateral of the second segment and two elevation at the middle of the segment; the first of those two elevations is an hook-like shaped. The new species might be distinguished too by the shape of the genital pieces that have the median sclerite with triangular sclerotized apex and right phallomere with a fishhook-like at apex, while in P. verticalis bears a median sclerite with a spiked apex and right phallomere with irregular margin at the apex.