Rhabdoblatta praecipua ( Walker, 1868 )

Anisyutkin, Leonid N., 2014, On cockroaches of the subfamily Epilamprinae (Dictyoptera: Blaberidae) from South India and Sri Lanka, with descriptions of new taxa, Zootaxa 3847 (3), pp. 301-332 : 316-319

publication ID

https://doi.org/ 10.11646/zootaxa.3847.3.1

publication LSID

lsid:zoobank.org:pub:19E58554-5B31-496B-B851-A26DEE4B7929

DOI

https://doi.org/10.5281/zenodo.6134132

persistent identifier

https://treatment.plazi.org/id/03CA2572-FFD1-FF9F-8580-115AC76CB30E

treatment provided by

Plazi

scientific name

Rhabdoblatta praecipua ( Walker, 1868 )
status

 

Rhabdoblatta praecipua ( Walker, 1868) View in CoL

( Figs. 8 View FIGURE 8 A–L, 9 View FIGURE 9 B, C, 11 View FIGURE 11 A, B)

Material. SRI LANKA, " Ceylon. A. Willey. 1906–189"— 1 male ( BMHN) .

Description. Male. General color yellowish ( Fig. 11A, B View FIGURE 11. A, F , see also Shelford 1910, t. 2, fig. 5a; Beccaloni 2007); facial part of head, 1st and 2nd antennal segments, mouthparts, pronotum, tegmina, legs and partly abdomen dirty-yellowish; eyes dark brown; antennae distal of 1st and 2nd segments brown; vertex, pronotum, tegmina and, in lesser degree, abdominal sternites densely speckled with brown; pronotum laterally bordered with yellow; abdominal tergites medially blackish. Surfaces smooth and lustrous; distal parts of antennae (approximately from 16th segment) and 5th segment of maxillary palps dull; punctation present only in basal parts of tegmina; facial part of head with not strongly expressed wrinkles ( Figs. 8 View FIGURE 8 A, 11A). Head about as long as wide ( Figs. 8 View FIGURE 8 A, 11A); ocellar spots distinct; distance between eyes 0.8 times of the eye length; distance between antennal sockets about 1.6 times of the scape length (1.2 mm); approximate length ratio of 3rd–5th segments of maxillary palps1: 1: 1.3. Pronotum as in Figs. 8 View FIGURE 8 B, 11B. Tegmina truncated apically, with distinctly attenuated apex ( Figs. 9 View FIGURE 9 B, 11B); sclerotized in proximal half; intercalary veins numerous (not shown on Fig. 9 View FIGURE 9 B); costal field comparatively long and narrow, as compared to Morphna species ( Fig. 9 View FIGURE 9 A); Sc thickened (well visible on ventral side of tegmen); R and M stems not separated; CuP distinct. Wings sclerotized along anterior margin (costal and subcostal fields) ( Figs. 9 View FIGURE 9 C, 11B), other areas membranous; Sc long and simple; RA long, with 2 apical veins; RS distinct; M long and simple; CuA pectinate with 6 complete (reaching to wing margin) veins; behind CuA situated long and simple, incrassated in proximal part, vein ( Fig. 9 View FIGURE 9 C, 1pl.), probably corresponding to 1st plical vein sensu Rehn (1951) or CuP [probably CuP + A1 sensu Bey-Bienko (1950)]; anal fan consisting of 16 veins reaching margin of wing; 3 possibly jugal veins situated behind anal fan. Anterior margin of fore femur as in type B, with 5 spines, including 1 apical one. Fore tibiae not thickened distally. Structure of hind tarsi: metatarsus about as long as other segments combined, with 2 rows of spines along lower margin, exterior and interior rows of spines with about equal number of spines, euplantula small and apical; metatarsus and 2nd–4th segments with 3–5 spines bordering euplantulae from inside and outside. Pretarsi in hind tarsi broken off, fore and mid tarsi claws symmetrical, very weakly serrated; arolium about as half of claw length. Abdomen without visible specializations; posterolateral angles of tergites moderately attenuate caudally ( Fig. 11B View FIGURE 11. A, F ). Anal plate (tergite X) trapezoidal in shape, with triangular median incision on caudal margin ( Fig. 8 View FIGURE 8 C). Cerci fusiform, long and narrow, very weakly depressed, with distinct segments ( Fig. 8 View FIGURE 8 C). Paraprocts as in Fig. 8 View FIGURE 8 D. Hypandrium as in Fig. 8 View FIGURE 8 E; slightly sclerotized; nearly symmetrical; styli flattened.

Male genitalia ( Fig. 8 View FIGURE 8 F–L). Right phallomere (R+N) ( Fig. 8 View FIGURE 8 F) with caudal part of sclerite R1T subrectangular in shape ( Fig. 8 View FIGURE 8 F, c.p.R1T); R2 curved; R3 elongated, distinctly widened caudally; R4 comparatively small, as compared with majority of Rhabdoblatta and Morphna species; R5 long, in shape of longitudinally elongated plate, fused with sclerite R3. Sclerite L2D (L1) with basal part rod-like, widened cranially ( Fig. 8 View FIGURE 8 G); "apical sclerite" cap-like, rounded, densely covered with recumbent bristles ( Fig. 8 View FIGURE 8 H, ap.scl.); "dorsal sclerite" ( Fig. 8 View FIGURE 8 H, d.scl.) flat, solidly connected with "apical sclerite". Sclerite L3 (L2d) with thin basal subsclerite; "folded structure" distinct, without bristles ( Fig. 8 View FIGURE 8 I, f.s.); apex of L3 with "small tooth" ( Fig. 8 View FIGURE 8 J–L, s.t.); "apical crest" weak ( Fig. 8 View FIGURE 8 J–L, ap.cr.). Sclerite L4U (L3d) weakly sclerotized, triangular in shape.

Measurements (mm). Head length: 5.0; head width: 5.0; pronotum length: 8.0; pronotum width: 10.4; tegmen length: 36.0; tegmen width (in place where CuP running into posterior margin of tegmen): 11.2.

Note. Spine rows on the hind metatarsus of the left leg are somewhat abnormal, probably due to lifetime damage. The right hind leg is broken off. The anal plate is slightly deformed ( Fig. 8 View FIGURE 8 C).

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Blattodea

Family

Blaberidae

Genus

Rhabdoblatta

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