Poeciloderrhis penduloides, 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 : 8-9

Poeciloderrhis penduloides sp. nov.

http://zoobank.org/ 44D4D398-AEDB-4B72-B788-055267D71E82

Figs 60–69

Diagnosis. General coloration. Shiny, light brown ( Fig. 60). Head with light brown vertex ( Fig. 61); interocular and interocellar spaces, and center of clypeus brown; ocelli brown; maxillary palps with light brown apical segment, with golden cilia. Eyes brown. Pronotum semi-transparent, with dark brown punctuations ( Fig. 62). Tegmen semi-transparent, with dark brown marks. Legs light brown, with spines, pulvilli, arolia and claws light brown. Abdomen brown with brown punctuations.

Dimensions of holotype male (mm). Total length: 26.9; length of pronotum: 6.9; width of pronotum: 8.7; length of tegmen: 22.1; width of tegmen: 9.0.

Description of the holotype male. Head triangular with rounded angles, vertex slightly exposed in dorsal view; interocular space about 1.45 mm long. Antennae threadlike and tomentose, surpassing apex of cerci. Maxillary palps with first and second segments reduced, third segment larger than fourth, and fifth segment slightly more dilated and densely tomentose.

Thorax. Pronotum ample, convex, with angles curved, base bearing small median projection. Legs with femur I with anteroventral surface bearing 3–4 strong spines up to median region, followed by series of small spines toward apex; apex with two strong apical spines; posteroventral surface with three strong spines, one apical; femora II and III bearing few strong spines on ventral surface. Claws symmetrical and specialized, ventrally with two rows of small teeth, similar to those on legs. Tegmen surpassing apex of abdomen. Marginal field ample, slightly concave; scapular field elongated with oblique venules; discoidal field convex, curved apically; anal field convex and well marked.

Abdomen. Tergal modification comprising three humped structures on first segment and one on second ( Fig. 63). Supranal plate round ( Fig. 64) with cerci surpassing length of plate; cerci with ventral surface bearing many cilia. Subgenital plate asymmetric ( Fig. 65); left style, in ventral view, long, threadlike and well sclerotized; right style, in ventral view, tiny, slightly sclerotized. Left phallomere with sclerotized median structure ( Fig. 66). Median sclerite with club-shaped apex, strongly sclerotized, with tiny spine ( Figs 67 and 68). Right phallomere with curved apex and small spine near apex ( Fig. 69).

Material examined. Holotype male, BRAZIL, Rio de Janeiro State, Itamanjuba , 09-IX-1981, Reys & Santos cols, MNRJ.

Etymology. The species penduloides , derived from to the pendulum-shaped apex of the median sclerite of the male.

Remarks. Poeciloderrhis penduloides sp. nov. is similar to Poeciloderrhis tijucana Silva & Lopes, 2015 in the coloration (light brown and semi-transparent in both). The new species might be distinguished from P. tijucana by its smaller size 26.9 mm (33.0 mm in P. tijucana ) and pigmentation of the tegmen ( P.penduloides sp. nov. bears small light brown spots, while P.tijucana have bigger spots), tergal modification ( P. tijucana bears two latero-apical elevations converging toward thorax on first segment, while P. penduloides sp. nov. bears tree humped structures). Besides that, the new species might be also distinguished by the shape of genital parts that presents a clubbed-like median sclerite (in P. tijucana the structure have a rounded finger-shaped apex).

New combination

We analyzed the type material of Poeciloderrhis bicolorata Rocha e Silva Albuquerque & Lopes, 1977 , and determined that it must be transferred to Epilampra . The specimens do not have the tergal modification and configuration of the genital pieces typical of Poeciloderrhis , with the right phallomere having a complete hook and the median sclerite with an accessory sclerite, termed the dorsal sclerite (Rocha e Silva Albuquerque and Lopes 1977: 509–510 figs 31–37). Thus the valid name is Epilampra bicolorata (Rocha e Silva Albuquerque & Lopes, 1977) .