Account
What the sources say about this taxon, as written.
diagnosis · 
Plazi
Diagnosis. Body medium. Wings absent. Ocelli absent. Male hind femora with numerous, strong, inner spines on ventral surface (basal spines larger than apical ones); while female hind femora less strongly specialized. Male hind tibiae distinctly curved, with strongly reduced spines on dorsal surface and undulate on ventral surface; female hind tibiae straight. Abdominal stridulatory area with 2 rows of oblique stridulatory teeth on second and third abdominal tergites each. Male ninth abdominal tergite entirely divided to two lateral lobes, each bearing an apical hook; tenth abdominal tergite ribbon like, interrupted in middle, with a distinctly broad, median area; subgenital plate broad, without styli, with a median projection on posterior margin, its lateral lobes slightly bifurcate apically and male genitalia entirely membranous. Female subgenital plate short and broad. Species included. The genus consists of 5 species in total, three of which from Southwest China China and the other two from North Vietnam .
diagnosis · Plazi
Diagnosis: Small to medium size for the family ( 14–25 mm .) ( Fig. 156 ). Megacephalic condition present, space between antennal sockets 2.5–3 times as wide as scape, without lateral carinae, ocelli inconspicuous ( Fig. 157 ). Fore coxa with an unarticulated spine, legs moderately short and robust with four or five pairs of movable ventral spines on fore and middle tibiae (that spines are rather short and including a pair of apical spurs). Wingless species. Second and third abdominal tergites with stridulatory teeth on lateral margins; 9 th tergite enlarged, cucculliform, apex split ( Fig. 158 ); subgenital plate without styli ( Fig. 159 ); cerci short. Female abdomen with unspecialized tergites; genital plate broad and long; ovipositor very short (as long as the half of hind femora), thin, smooth and curved upwards ( Fig. 160 ). Included species: Type species: Bianigryllacris trilobus (Bian & Shi, 2014) n. comb. (Before in Apotrechus ) and seven additional species: B. bilobus (Guo & Shi, 2012 ) n. comb. , B. digitatus ( Liu & Bi, 2008 ) n. comb. , B. fallax ( Liu & Bi, 2008 ) n. comb. , B. nigrigeniculatus ( Liu & Yin, 2002 ) n. comb. , B. parvospinus ( Liu & Yin, 2002 ) n. comb. , B. quadratus ( Li & Liu, 2015 ) n. comb. and B. transversus ( Liu, Bi & Zhang, 2010 ) n. comb. (all this species before in Apotrechus ).