簡介:"DikelokephalinidaeIntroductionExoskeleton opisthoparian, isopygous. Glabella tapering with 1 to 4 pairs of usually deep slitlike lateral furrows, not reaching axial furrows, eye ridges strong, palpebral rims prominent and palpebral furrows well defined, frontal area of variable length (sag.) , anterior furrow obsolete or very shallow; eyes of medium size to large, behind center of glabella; fixigenae upsloping, of medium width, with arcuate palpebral areas and pair of alae usually present opposite rear part of glabella; librigenae quadrate, with genal spines of variable length. Thorax with at 8 segments; axis convex; pleurae twice length (tr.) of axis, with short pointed ends. Pygidium subcircular to subquadrate; axis extending 0.75 or more of length, with 6 to 8 axial rings; pleural fields usually wider than axis, with 6 to 8 pleurae merging into narrow border, pleural furrows and border furrow obsolete; posterior margin smoothly curved or with 1 or 2 pairs of prominent flat spines. Surface smooth or finely granulose. Bertillon pattern strong on doublures. L.Ord. 後頰型面線;頭尾大小相近(isopygous)。頭鞍上有一到四對未延伸到軸溝的裂縫狀凹陷;眼脊突起;眼緣(palpebral rim)顯著,眼溝清楚。頭部前區長短不一,前溝(anterior furrow)淺或消失;眼中至大型,位於頭鞍中段以後;固定頰upsloping,寬度中等,眼區弧形;在頭鞍後段外側常有一對葉狀體(alae)。頰刺長短不一。胸部至少八節,軸區突起,肋區寬度為軸區兩倍,肋節末端呈短刺狀。尾部半圓形至亞四邊形;尾軸為尾部0.75倍或更長,6至8個軸環節;肋區通常較軸區寬,6至8個肋節,向外沒入窄邊緣;肋溝及邊緣溝消失;後緣平滑或有1至2對平刺。表面平滑或佈有細顆粒。腹邊緣的同心圓線紋(Bertillon pattern)明顯。"