Two new species of Petrobunus from China (Opiliones: Laniatores: Petrobunidae) Author Zhang, Chao Author Zhang, Feng Author Sharma, Prashant P. text Zootaxa 2018 2018-11-20 4524 1 51 64 journal article 27937 10.11646/zootaxa.4524.1.3 11eafe26-5cb6-40a4-8f5c-c92eb07df370 1175-5326 2610318 FD930399-D849-4ED1-83FE-4FD0FA9D1466 Petrobunus Sharma and Giribet, 2011 Petrobunus Sharma & Giribet, 2011 : 112 . Type species: Petrobunus schwendingeri Sharma and Giribet, 2011 , by original designation. Distribution ( Fig. 52 ). China ( Chongqing , Hebei , Taiwan) , Philippine (Palawan, Panay), Expansion of Penis ( Figs. 37–45 ). Due the hydraulic pressure the glans exhibit a mix of two movements: The capsula externa have an erection movement changing the position (90–100 degrees) respect to the truncus axis and the capsula interna is everted. As result of the capsula interna movement the parastylar lobes are completely everted and folded against the capsula externa and the stylus fully exposed.