原文Introduction: typically very spinose and densely sculptured trilobites. ! E" z1 ~" U) z' c6 fCephalon: convex; glabella tapering forward or subparallel, extending to anterior margin or nearly so, less complex lobation than in Lichoidea; eye ridges run from anterior end of glabella to palpebral lobe; opisthoparian sutures, often placed on sutural ridges; distinct notch in margin of free cheek adjacent to where anterior sutures cut cephalic margin; facial sutures secondarily lost in some genera; short genal spines typically present. # i4 O) n: F- O# ?& q: K# v) w2 w
Thorax: 8 – 10 segments; tips of each bear 2 – 3 pairs of spines (anterior pair often difficult to see, ventrally directed); often with symmetrical row arrangements of pleural spines or tubercles. , @" G0 p% ^: [- FPygidium: micropygous, short, transverse, with 2 – 3 axial rings (3rd often faint), one or more pairs of tubular border spines, the largest of which connected to first axial ring by prominent ridge.
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; O2 y; i$ G8 P2 I5 }4 {5 I) Q: g( C4 h大概意思是8 - 10的每一段;2 - 3双棘 外骨骼非常多刺& p% J# F6 r. @3 _, r( k; d
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pygidium micropygous transverse,bearing one or more pairs of spines,larges of which connected to first axial ring via porminent ridge 这句的大概意思是小尾板横向、轴承的一个或多个双棘,具有轴环然后连接到通过的背脊上。 翻译错了帮忙改正