Placoblatta beybienkoi Anisyutkin, sp.nov.
Creators: name: Anisyutkin, Leonid N.
name: Yushkova, Olga V.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Blattodea
Blaberidae
Placoblatta
Placoblatta beybienkoi

description: Placoblatta beybienkoi Anisyutkin, sp.nov.
(Figs. 4 F, G, 7A–K, 11D)
Material. Holotype—male, SRI LANKA, Central prov., "31 Ceylan Pidurutalagala ", 29 January 1970, coll. C. Besuchet, Y. Löbl (MHNG).
Etymology. This species is named in honour of the famous Russian entomologist, Prof. G.Ya. Bey-Bienko (1903–1971).
Description. Male (the holotype). General colour yellowish brown, with scattered small brown spots (Fig. 4 G, F); facial part of head darker, dark brown; eyes black; mouthparts and, partly, legs dirty yellow. Surfaces lustrous; antennae with lustrous proximal 8–9 segments, the rest of segments dull; thoracic and abdominal tergites uneven, somewhat rugose, densely covered with small tubercles and longitudinal inflations along caudal margins of thoracal and abdominal tergites (Figs. 4 F, 7B); facial part of head moderately punctuated. Head rounded at vertex, epicranial sutures present (Figs. 4 G, 7A); ocellar spots small, but distinct; a weak transverse hollow located between antennal sockets; distance between eyes 1.6 times eye length; distance between antennal sockets about twice of the scape length (about 0.6 mm); approximate length ratio of 3rd–5th segments of maxillary palps 1.1: 1.0: 1.5. Pronotum campaniform, transverse, anterior and lateral margins semicircular, posterior margin nearly straight (Figs. 4 F, 7B). Meso- and metanotum transverse (Figs. 4 F, 7B). Tegmina short, only reaching 2nd abdominal tergite, transformed into wing scales; venation obsolete. Anterior margin of fore femur armed as in the type D sensu Roth (2003) or C sensu Bey-Bienko (1950), all spines, including apical, substituted for uniform row of very short spinules. Fore tibiae moderately thickened distally. Structure of hind tarsi (Fig. 7 C): metatarsus a little shorter than other segments combined, with large euplantula along lower margin, 2nd–4th segments with large euplantulae; tarsal spines absent; all euplantulae with spinules; claws symmetrical and simple; arolium about half of claw length. Abdominal tergites without visible glandular specializations; posterolateral angles of tergites obtuse (Figs. 4 F, 7B) Anal plate (tergite X) wide and trapezoidal, caudal margin with weak median incision (Fig. 7 D, E). Cerci shortened, flatten, with segments partly fused (Fig. 7 D, E). Paraprocts of blaberid-type (Fig. 7 E). Hypandrium nearly symmetrical (Fig. 7 F), its caudal margin rounded, with a distinct median incision; styli short and fusiform.
Male genitalia (Fig. 7 G–K, 11D). Right phallomere (R+N) with caudal part of sclerite R1T subrectangular in shape (Fig. 7 G, H, 11D, c.p.R1T), densely covered with bristles; R2 weakly curved; R3 elongated, caudally bifurcated; R4 plate-like; R5 large, fused with sclerite R3. Sclerite L2D (L1) divided into basal and apical parts (Fig. 7 I); basal part rod-like, weakly widened cranially; apical part rounded, densely covered with recumbent bristles; "dorsal outgrows" flat (Fig. 7 I, d.o.). Sclerite L3 (L2d) without basal subsclerite, "folded structure" and bristles (Fig. 7 J, K); groove hge absent. Sclerite L4U (L3d) weakly sclerotized, subtriangular.
Female unknown.
Measurements (mm). Head length: 2.4, width 2.4, pronotum length 3.3, width 5.4, mesonotum length 1.0, tegmina length 3.0, width 1.9, metanotum length 1.1.
Comparison. The new species differs from the type species (P. rugosa) in its smaller size, the unarmed anterior margin of fore femur, the absence of tarsal spines and the larger arolium.
description: Published as part of Anisyutkin, Leonid N. & Yushkova, Olga V., 2017, New data on cockroaches of the subfamily Epilamprinae (Dictyoptera: Blaberidae) from India and Sri Lanka, with descriptions of new species and the genital complex of Aptera fusca (Thunberg, 1784), pp. 41-64 in Zootaxa 4236 (1) on page 54, DOI: 10.11646/zootaxa.4236.1.2, http://zenodo.org/record/322014