Six new species of Poeciloderrhis from Brazil ( Blattaria : Blaberidae ) with a new record and a new combination

In this contribution six new species of Poeciloderrhis Stål, 1874 are described: P. aureolatus sp. nov. (Holotype male in MNRJ: Brazil, Rio de Janeiro State), P. mediansclerostylatus sp. nov. (Holotype male in MNRJ: Brazil, Rio de Janeiro State), P. diamantinensis sp. nov. (Holotype male in MNRJ: Brazil, Mato Grosso State), P. itatiaiensis sp. nov. (Holotype male in MNRJ: Brazil, Rio de Janeiro State), P. vanzolinii sp. nov. (Holotype male in MNRJ: Brazil, Rio de Janeiro State), and P. penduloides sp. nov. (Holotype male in MNRJ: Brazil, Rio de Janeiro State). The genus is recorded for the first time from the state of Rondônia, Brazil based on P. diamantinensis sp. nov. A new combination is proposed for Poeciloderrhis bicolorata Rocha e Silva & Lopes, 1977 that is transferred to Epilampra Burmeister, 1838. For specific delimation, the tergal modification in the abdomen, the genital plates and their respective structures were analyzed. A key for males including all species of Poeciloderrhis is also given.


INTRODUCTION
The species of Poeciloderrhis Stål, 1874 differ from Epi lampra Burmeister, 1838 by the tergal modifications in the first and second abdominal segments, L2d pointed and fused solidly to L2vm; prepuce membranous, not clearly defined by dense setae; R2 short and stout, without apical incision; L1 without a setal brush and the sclerotized cleft fused together (Roth 1970).
Recently, Silva and Lopes (2015) presented a synopsis of the genus and Anisyutkin (2016) redescribed the type of the species, P. verticalis (Burmeister, 1838), in detail, increasing our knowledge on this group of roaches.
The goals of this paper are to describe six new species of Poeciloderrhis and provide a new record of the genus from state of Rondônia, northern Brazil.

MATERIAL AND METHODS
The genital plates were removed after dissection of the posterior part of the abdomen, using standard techniques (e.g., Lopes and Oliveira 2000).After analysis, the genital plates and genital pieces were stored in microvials containing glycerin and were attached to the respective exemplar (Gurney et al. 1964).The male tergal modifications of the abdomen were observed from the base of the wings after preparation with diluted detergent over the wing insertions, using a brush.The terminology for the genitalia and the taxonomic classification follow Roth (2003).Digital images of the habitus, pronotum, head, tergal modification and genitalia were taken with a camera mounted on a Leica M205C stereoscopic microscope, with software LAS version 4.8.The holotypes are deposited in the collection of the Department of Entomology, Museu Nacional, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil (MNRJ).The images of P. verticalis (Figs 1-3), sent from the Zoologisches Institut der Martin-Luther Universität and the Naturhistorisches Museum Wien, have no scales.Diagnosis.General coloration.Shiny yellowish-brown (Fig. 4).Head with brown vertex (Fig. 5), with four light brown circular spots; interocular space, interantennal and central portion of clypeus brown.Maxillary palps with brown apical segment, with golden cilia.Eyes black.Pronotum semi-transparent, with central brown mark extending from posterior end nearly to the anterior end (Fig. 6).Tegmen semi-transparent, light brown, with brown spots.Legs brown with dark brown spines, arolia and claws.Abdomen light brown with dark brown punctuations.
Dimensions (mm).Holotype male.Total length: 42.8; total length of pronotum: 8.1; width of pronotum: 9.1; length of tegmen: 37.3; width of tegmen: 9.7.Paratype males.Total length: 7; Description of the holotype male.Head triangular with rounded borders, vertex barely visible in dorsal view; interocular space about 1.20 mm wide; antennae long, threadlike and tomentose, surpassing apex of cerci.Maxillary palps with first and second segments reduced, third segment 25% larger than fourth and 25% smaller than fifth segment, fifth segment slightly more swollen and densely tomentose.
Thorax.Pronotum ample, convex, with curved edges, base with small median projection.Legs with half of femur I with anteroventral surface bearing five robust spines followed by series of small spines up to apex, apex with two strong spines; posteroventral surface with three robust spines, one apical; femora II and III bearing few strong spines on ventral surface.Pulvilli on four tarsal segments, claws symmetrical, with two rows of small spines on ventral surface, similar to two spines on legs.Tegmen surpassing apex of abdomen.Marginal field elongated, slightly concave, scapular field elongated with oblique venules, discoidal field curved and convex apically, anal field convex and well defined.
Etymology.The species name aureolatus is derived from the yellowish-brown coloration of the specimens.
Remarks.Poeciloderrhis aureolatus sp.nov. is similar to Poeciloderrhis proxima (Brunner von Wattenwyl, 1865) in coloration (both shiny brown).The new species might be distinguished from P. proxima by its tergal modification (the second abdominal segment bears two lateral humps followed by two at middle of plate in P. aureolatus sp.nov.while P. proxima have two lateral humps followed by two at middle of plate, being that second elevation of the middle of the plate ends in a hook-like structure) and shape of the genital parts (right phallomere with small short apex in P. aureolatus sp.nov., while P. proxima have right phallomere with rounded apex).Besides that, pre-apical region in P. aureolatus sp.nov.have an expansion, which is absent in P. proxima.
Description of the holotype male.Head triangular with rounded corners, vertex barely exposed in dorsal view; interocular space about 1.24 mm.Antennae long, threadlike and tomentose, surpassing apex of cerci.Maxillary palps with first and second segments reduced, third segment longer than fourth, fifth segment slightly more dilated and densely tomentose.
Thorax.Pronotum wide, convex, angles curved, base with small median projection.Legs with femur I with anteroventral surface with six strong spines up to middle, followed by series of small spines toward apex, apex bearing two strong spines; posteroventral surface with three to four strong spines, one apical; femora II and III bearing few strong spines on their ventral surfaces.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 abdomen.Marginal field elongated, slightly concave, scapular field elongated with oblique venules, discoidal field convex, curved apically, anal field convex and conspicuous.
Etymology.The species name, mediansclerostylatus is derived the styliform median sclerite, which is similar to P. imperialis.
Remarks.Poeciloderrhis mediansclerostylatus sp.nov. is similar to Poeciloderrhis imperialis Rocha e Silva & Jurberg, 1978 in coloration of the pronotum (semi-transparent with dark brown trapezoidal spot) and habitus (shiny brown).The new species might be distinguished from P. imperialis by its smaller size 30.0-31.1 mm (31.6-33.0mm in P. imperialis), shape of the tergal modification consisting of longitudinal hump on first segment and a complex of four humps on second segment, while in P. imperialis is composed by a slight elevation, trianguliform near the apex and two elevations next from the base which follows from the center of the structure towards the sides in the first segment and another slight elevation in the base of the second segment.In addition, P. mediansclerostylatus sp.nov.can be distinguished too by its shiny-brown general coloration, while it is shiny light brown in P. imperialis, and genital morphology that presents the median sclerite with an apical spine and right phallomere with an irregular margin in the apex while the median sclerite presents a rounded structure and right phallomere with rounded apex in P. imperialis.
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.
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 (25.0-32.0mm 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 axshaped 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).
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.
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 (36.8-38.8mm 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.
Dimensions of holotype male (mm).Total length: 27.5; length of pronotum: 6.2; width of pronotum: 8.5; length of tegmen: 22.7; width of tegmen: 8.1 Description of the male holotype.Head triangular with rounded corners, vertex slightly exposed in dorsal view; interocular space about 1.34 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 segments, slightly more dilated and densely tomentose.
Thorax.Pronotum ample, convex, with curved angles, base bearing small median projection.Legs with femur I with anteroventral surface with four strong spines up to median region, followed by series of small spines up to apex, apex with two strong apical spines; posteroventral surface with three strong spines, one apical; femora II and III with few strong ventral spines.Pulvilli present on all four tarsal segments, claws symmetrical and specialized, ventrally with two rows of small teeth, similar to those on legs.Tegmen surpassing apex of the abdomen.Marginal field wide, slightly concave, scapular field elongated with oblique venules, discoid field convex, curved apically, anal field convex and well-marked.
Remarks.Poeciloderrhis vanzolinii sp.nov. is similar to Poeciloderrhis ferruginea (Brunner von Wattenwyl, 1865) in the coloration of the pronotum (light brown, semi-transparent with brown punctuations in both), and size 27.5 mm (25.0-32.0mm in P. ferruginea).The new species might be distinguished from P. ferruginea by its tergal modification (three humped structures on first segment and one on second in P. vanzolinii sp.nov., while in P. ferruginea bears presents a piramidal, long, with cilia, located in the first tergite and a cavity followed by a curved rod in the second tergite, general coloration shiny light brown in P. vanzolinii sp.nov., while in P. ferruginea its presents shiny brown.The new species also might be distinguished by its shape of the genitalia (median sclerite with club-shaped apex and right phallomere with a small curved apex in P. vanzolinii sp.nov., while P. ferruginea bears a mediansclerite with spiked apex and a right phallomere with an ax-shaped apex.
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).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).