TABLE 2 in The identity of an elusive Chilean harvestman, Pachylus crassus (Roewer, 1943) (Opiliones: Gonyleptidae: Pachylinae), with taxonomic and distribution notes
收藏资源简介：
TABLE 2. Comparative account of diagnostic features of the two members of the crassus -species-group, Pachylus crassus (Roewer, 1943) and Pachylus quinamavidensis Muñoz [-Cuevas], 1969. Pachylus crassusPachylus quinamavidensisArea V of DS: pair of paramedian tuberclesrounded, similar in size to others in same row (Fig. 1A)conical, larger than others in same row (Muñoz 1969: figs 1–2)Stigmatic segment: concavity of posterior marginnarrow, trapezoid-shaped, extending between stigmata (Fig. 4A)curved, situated behind stigmata (Fig. 4B)Stigmatic segment: armatureunarmed, no apophyses on posterolateral corners (Fig. 4A)each posterolateral corner bearing a short blunt apophysis (Fig. 4B)Coxa IV: prolateral apophysiswith simple tip, directed backwards (Fig. 4C); with a slight retroventral tuberosity (Fig. 1A)truncate, tip bilobate and curved, oriented diagonal to axis of body (Fig. 4D); no ventral tuberosityTrochanter IV: prolateral apophysislarge, ear-like, set back to distal end (Fig. 4C)medium-sized, truncate, in middle of article (Fig. 4D)Trochanter IV: retrolateral and retroapical apophysesretrolateral one large, blunt; retroapical one large (Fig. 4C)retrolateral one absent or rudimentary; retroapical one small (Fig. 4D)Femur IV: size and curvature in lateral viewslender, rather long (77–92% of DS length); angle ~150°thick, rather short (67–73% of DS length); angle ~120°Femur IV: dorsal apophysisabsentvery small or reduced to a granulous bulgePatella IV: armaturecompletely unarmed (Fig. 4E)with 1–2 retroventral apophyses (Fig. 4E)
表2 粗厚物种群（crassus-species-group）两个物种的鉴别特征对比：粗厚厚盲蛛（*Pachylus crassus*，Roewer, 1943）与基纳马维德厚盲蛛（*Pachylus quinamavidensis* Muñoz [-Cuevas], 1969） 躯体背盾第五区域： 粗厚厚盲蛛：中侧一对结节呈圆形，大小与同排其余结节一致（图1A）； 基纳马维德厚盲蛛：中侧一对结节呈锥形，大于同排其余结节（Muñoz 1969：图1-2） 气门节后缘凹陷： 粗厚厚盲蛛：凹陷狭窄，呈梯形，延伸于气门之间（图4A）； 基纳马维德厚盲蛛：凹陷呈弧形，位于气门后方（图4B） 气门节附属结构： 粗厚厚盲蛛：无棘突，后外侧角无突起（图4A）； 基纳马维德厚盲蛛：每个后外侧角具1枚短钝突起（图4B） 第四基节前侧突起： 粗厚厚盲蛛：顶端结构简单，指向后方（图4C），并带有轻微后腹结节（图1A）； 基纳马维德厚盲蛛：顶端平截，呈双叶状且弯曲，与躯体轴线呈斜向排布（图4D），无腹侧结节 第四转节前侧突起： 粗厚厚盲蛛：突起较大，呈耳状，靠近转节远端（图4C）； 基纳马维德厚盲蛛：突起中等大小，顶端平截，位于转节中部（图4D） 第四转节后侧及后顶端突起： 粗厚厚盲蛛：后侧突起大且钝，后顶端突起亦较大（图4C）； 基纳马维德厚盲蛛：后侧突起缺失或仅为残迹，后顶端突起较小（图4D） 第四腿节侧视形态与曲度： 粗厚厚盲蛛：纤细偏长，长度约为背盾总长的77%~92%，弯折角度约150°； 基纳马维德厚盲蛛：粗壮偏短，长度约为背盾总长的67%~73%，弯折角度约120° 第四腿节背侧突起： 粗厚厚盲蛛：无背侧突起； 基纳马维德厚盲蛛：突起极微小，或退化为颗粒状隆起 第四膝节附属结构： 粗厚厚盲蛛：完全无棘突（图4E）； 基纳马维德厚盲蛛：具1~2枚后腹突起（图4E）
