Poeciloderrhis diamantinensis, 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 : 4-6

Poeciloderrhis diamantinensis sp. nov.

http://zoobank.org/ 57641D75-52BC-4BD5-A1E0-C2181020C60D

Figs 30–39

Diagnosis. General coloration. Shiny, light brown ( Fig. 30). Head with front ranging from brown to light brown; interocular and interantennal spaces brown, other head structures light brown; ocelli brown; eyes dark brown ( Fig. 31). Pronotum light brown, semi-transparent with brown punctuations ( Fig. 32); tegmen light brown, semi-transparent, with dark brown spots. Legs light brown, spines, pulvilli, arolia and claws light brown. Abdomen brown.

Dimensions (mm). Holotype male Total length: 22.3; length of pronotum: 5.1; width of pronotum: 6.3; length of tegmen: 20.2; width of tegmen: 5.8. Paratype males. Total length: 22.1–24.5; length of pronotum: 4.9–6.0; width of pronotum: 6.3–7.0; length of tegmen: 20.2–22.0; width of tegmen: 5.5–6.5.

Description of the holotype male. Head triangular with rounded corners, vertex barely exposed in dorsal view; interocular space about 0.62 mm. Antennae long, threadlike and tomentose, surpassing apex of cerci. Eyes anterolateral; maxillary palps with first and second segments reduced, third segment longer than fourth, fifth segment slightly more dilated and densely tomentose.

Thorax. Pronotum ample, convex, curved laterally, punctuations lying in small depressions, 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 four strong spines, one apical; femora II and III bearing few strong spines on ventral surface. Pulvilli present on four tarsal segments, claws symmetrical and specialized, with two rows of small teeth, similar to spines on legs. Tegmen surpassing apex of abdômen. Marginal field elongate, slightly concave, scapular field elongated with oblique venules, discoidal field convex, curved apically, anal field convex and conspicuous.

Abdomen. Tergal modification consisting of two large transverse humped structures ( Fig. 33) with apical cilia on first segment, and another transverse, arched and ciliated structure apically, on second segment. Supranal plate with cerci surpassing size of plate in length ( Fig. 34); cerci with ventral cilia. Subgenital plate slightly asymmetric, left style, in ventral view, slightly larger than right ( Fig. 35). Left phallomere sclerotized ( Fig. 36). Median sclerite with apex aculeate, with small, strongly sclerotized curved ( Figs 37 and 38). Right phallomere with curved, club-shaped apex, and small spines near apex ( Fig. 39).

Material examined. Holotype male, BRAZIL, Mato Grosso State: Diamantino, Fazenda São João, Km 200, BR 163 , without collector. Paratypes: Mato Grosso State: 1 male, Barra do Bugres , 19–21/XI/1983, J.Becker, O. Roppa, Belmiro,S. cols.; 7 males, Sinop, 12°31’S, 55° 37’W, BR 163 , Km 500–600, 350 m, X-1974, Alvarenga & Roppa cols ; Rondônia State: 1 male, Nova União, Ouro Preto, XI-1983, without collector; 1 male, Vilhena , XI-1973, Alvarenga col. ; Goiás State: 1 male, Jataí , XII-1972, Oliveira col. All in MNRJ .

Etymology. The species name, diamantinensis , is derived from the name of the locality where this species was collected.

Remarks. Poeciloderrhis diamantinensis sp. nov. is similar to Poeciloderrhis ferruginea (Brunner von Wattenwyl, 1865) in coloration (shiny light brown in both). The new species might be distinguished from its smaller size 22.1–24.5 mm (25.0–32.0 mm in P. ferruginea ), tergal modification (two large transverse humped structures with apical cilia on first segment, and another transverse, arched and ciliated structure apically, on second segment, while P. ferruginea presents a piramidal, long, with cilia, located in the first tergite and a cavity followed by a curved rod in the second tergite) and shape of genital parts with apex of right phallomere golf club-like and an pre-apical region of median sclerite without expansion in P. diamantinensis sp. nov., while in P. ferruginea the right phallomere bears an ax-shaped apex and median sclerite with a pre-apical expansion. Poeciloderrhis diamantinensis sp. nov. was determined by Roth (1970) as Poeciloderrhis A (pg. 108, figs 28–33).