Synopsis of the genus Nyctibora Burmeister , with description of two new species from Rio de Janeiro , Brazil ( Ectobiidae , Nyctiborinae )

Two new species of Nyctibora are described and considered similar to Nyctibora sericea. Coloration, morphology and genital pieces of males were analyzed. All the studied material shall be deposited in the Museu Nacional.


Introduction
The genus Nyctibora was described by Burmeister in 1838, based on morphological characters of the head, antennae and pronotum; the tegmen often reaching beyond the apex of the abdomen; legs with very spiny femora; pulvilli developed, occupying almost completely the second quarter of tarsal articles; arolia present; supra-anal plate differentiated, with cerci widened, short and tomentose, as a basic characteristic.Rehn (1951), after delimiting tribes within the subfamily Nyctiborinae, placed Nyctibora in the tribe Nyctiborini, based on Nyctibora noctivaga Rehn, 1903, and characterized it based on the costal and subcostal veins of the tegmen.
Nyctiborinae includes 10 genera and 70 species, of which 32, distributed from Mexico to Argentina, are classified in Nyctibora.According to Ve ´lez- Bravo & Franz (2011in: Salazar & Mala ´ver, 2012) Nyctiborinae can be considered paraphyletic, but more characters are necessary to confirm the position of Muzoa Hebard, 1921 outside the subfamily, they divided Nyctiborinae into two groups.Group 1 includes Muzoa Hebard, 1921, Megaloblatta Dohrn, 1887, Eushelfordia Hebard, 1924 and Paratropes Serville, 1839 and Group 2 includes Pseudoischnoptera Saussure, 1869, Eunyctibora Shelford, 1908 and Nyctibora Burmeister, 1838.They did not included Eushelfordiella Lopes & Oliveira, 2007, Nyctantonina Ve ´lez, 2013and Paramuzoa Roth, 1973 in their revision.Salazar & Mala ´ver (2012) supported the results and called them the ''true phylogeny of the subfamily''.The results were based on a cladistic analysis of 53 genital characters scored from 24 species.About half the members of the genus are diurnal, which is rare among Blattodea (Bell et al., 2007).Examples are Paratropes, Eunyctibora and Eushelfordia, which can be collected from vegetation during the day.Most nyctiborines are detritivores, consuming decomposing plant matter.Some species of Nyctibora prefer dead animals, whereas species of Paratropes feed on pollen and nectar (Perry 1978).According to Salazar & Mala ´ver (2012), the taxonomy of Nyctibora is still poorly understood.
Two new species from the state of Rio de Janeiro, Ny. bromelicola and Ny.isoldae, are described here.

Materials and Methods
The morphology of the specimens described here was analyzed according to Lopes & Oliveira (2000).The terminology used for the genital parts is based on Roth (2003).The systematic position of the genus follows Beccaloni (2015).After analysis, the plates and genital parts were kept in microvials containing glycerin and were stored next to their respective pinned specimen (Gurney et al. 1964).The material is deposited in the collection of the Museu Nacional, Rio de Janeiro (MNRJ).
Thorax with pronotum subtriangular, convex, transverse, sparsely tomentose.Fore femur with anteroventral surface bearing 10 robust spines, small and decreasing in size toward apex, plus two pre-apical spines slightly larger than the anterior spines, and two large apical spines; posteroventral surface with five robust spaced spines, one apical.Mid-and hind femora with six to eight robust spaced spines, one apical, on ventral surfaces; one genicular spine present on hind femora.Pulvilli present on all tarsal articles; arolia present; claws asymmetrical and simple.
Tegmen tomentose and long, reaching beyond apex of cerci, marginal field short; scapular field narrow with oblique venular arrangement; discoidal field with longitudinal venular arrangement; anal field ample and well marked.Wings with anterior field with apexes of rami not dilated; apical triangle slightly developed, and anal field fan-folded.

Discussion
The species differs from Ny. sericea Burmeister, 1838 by coloration totally blackened pronotum and not to present the yellow spot in the marginal field; by setting the subgenital plate more pronounced medially; triangular supra-anal plate with apex acuminate medially; left phallomere hook-shaped with tapered apically and higher in length; median sclerit rounded in the base with the apex in the shape of a sickle.

Etymology
The species epithet refers to the habitat where it was collected, a bromeliad.
Head ''triangular'', vertex covered by pronotum in dorsal view; interocular space narrow, measuring about one-sixth distance between antennal bases; ocelli well-defined; maxillary palp with fifth segment dilated, longer and more tomentose than the others.
Thorax with pronotum subtriangular, convex, transverse, sparsely tomentose; legs with fore femur with anteroventral surface bearing a row of ten spines from base to median region, two apical spines slightly larger than anterior spines; plus two large apical spines; posteroventral surface with four robust spaced spines on apex, one on apical third.Mid-and hind femora bearing six to eight robust and spaced spines, one apical, on ventral surface; genicular spines present on last two femora.Pulvilli present on all tarsal segments; arolia present and well developed; nails asymmetrical and simple.Tegmen long, reaching beyond apex of cerci, subcostal venation well differentiated toward scapular field; marginal field short; scapular field narrow with oblique veins; discoidal field with longitudinal veins; anal field ample and well demarcated.Wings developed, not reaching beyond apex of tegmen; anterior field with apex of rami of radial not dilated, apical triangle little developed, and anal field ample, fan-folded.

Discussion
Ny. isoldae sp.nov.differs from N. sericea by coloration totally, blackened pronotum and tegmen and without yellow spot in the pronotum; subgenital plate similar to Ny. bromelicola sp.nov.and differs from Ny. bromelicola sp.nov.and Ny.sericea by configuration of the sinous apex apical of supra-anal plate and little acuminated compared to Ny. bromelicola sp.nov .In Ny sericea is absent.Left phallomere has hook-shaped with elongated and tapered apex as in Ny. bromelicola sp.nov, but with reentrance sub-apical.Sclerite very long in length, rounded at the base; apex with rounded in the base and tapered apex, which sets it apart from Ny. bromelicola sp.nov.and Ny.sericea which does not have this configuration.

Etymology
The name honors Isolda Rocha e Silva, former researcher on Blattodea at the Museu Nacional, now retired.