Scalida biclavata Bey-Bienko, 1958

Wang, Zongqing & Che, Yanli, 2010, The genus Scalida Hebard (Blattaria: Blattellidae, Blattellinae) in China, Zootaxa 2502 (1), pp. 37-46 : 38-40

Scalida biclavata Bey-Bienko, 1958

Figures 1–10

Scalida biclavata Bey-Bienko 1958: 672 .

Sigmella biclavata, Roth 1991: 14 .

Description. Male: Pronotum length×width 2.7–2.8× 3.5–3.8 mm, tegmen length 11.0– 12 mm, body length including tegmen 13.5–14.5 mm. Body reddish brown or blackish brown. Vertex reddish brown, face yellowish brown. Occiput region pale yellow. Eyes black, suffused with gold. Antennal base yellowish brown, remainder of antenna blackish brown. Fifth maxillary palpomere dark brown, other maxillary palpomeres yellowish brown. Pronotum with one U-shaped dark brown macula ( Fig.2 ) and pale yellow lateral borders. Tegmina reddish brown with pale yellow edges. Legs and abdomen yellowish brown. Vertex with interocular space slightly narrower than distance between antennal sockets ( Fig.1 ). Third and fourth maxillary palpomeres same length, each shorter than the fifth palpomere. Subcostal and costal veins of hind wings swollen and thickened, radial veins straight and unbranched; medial and cubital vein curved, medial vein simple and unbranched, cubital vein with 3 complete branches and 2 incomplete branches, apical triangle small ( Fig. 3 ). Front femur Type B 3 ( Fig. 4 ). Seventh abdominal tergum with a pair of large, transverse depressions medially, posterior margin with small V-shaped indention, posterolateral corners with small rounded lobes ( Fig. 5 ).Male genitalia with supra-anal plate in ventral view symmetrical, middle of hind margin with one W-shaped incision, two posterior angles acuminate and with some long setae ( Fig.6 ). Paraprocts asymmetrical, the right with two plates, one slender and simple, the other above the first, fingerlike and tapering, apex with minute teeth; left paraproct an irregular, simple plate ( Fig. 6 ). Subgenital plate in dorsal view asymmetrical, middle of posterior margin distinctly convex and with two different and bifurcated styli, one robust at base and acuminate at apex, the other similar but larger and with one small tooth; left phallomere hook-like with distal part robust, apex acute ( Fig. 8 ); median phallomere sticklike, long and slender with sinuate appendage acute at left and bifurcated at right ( Fig. 9 ); right phallomere large, sclerotized and with irregular plates ( Fig. 10 ).

Material examined. 2♂, China, Yunnan, Xishuangbanna, Xiaomengyang , 850 m, 17 June 1957, coll. Zang Lingchao ; 1♂, same data but coll. Wang Shuyong ; 2♂, Yunnan, Xishuangbanna, Menghun , 750 m, 7 June 1957, coll. Hong Chunpei ; 1♂, Yunnan, Xishuangbanna, Mengla , 17 July 2004, coll. Wang Zongqing.

Remarks. Roth (1991) placed this species in Sigmella based on the S-shaped medial and cubital veins of the hind wing, and assumed that Bey-Bienko’s description (1958) was incorrect in some respects. After examination of specimens from Yunnan Province, China, deposited in the Insect Collection of the College of Plant Protection, Southwest University, we are confident that Bey-Bienko (1958) was correct. The degree of sinuation of the medial and cubital veins is variable in different individuals, the styli are specialized, and the interstyle process is absent. Therefore, we consider this species to be properly placed in Scalida .

Distribution. China (Yunnan).

Figures

FIGURES 1–10. Scalida biclavata Bey-Bienko. 1. Head; 2. Pronotum; 3. Hind wing; 4. Front femur; 5. Sixth and seventh abdominal terga, dorsal view; 6. Supra-anal plate and paraprocts, ventral view; 7. Subgenital plate, dorsal view; 8. Left phallomere; 9. Median phallomere and appendage of median phallomere; 10. Right phallomere.