原文Introduction: typically very spinose and densely sculptured trilobites. 5 \! R2 h1 a7 D
Cephalon: 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. 9 X- Y Y$ K0 f- E% L, X8 J
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. & o8 F, N5 w* d* _5 r2 u( sPygidium: 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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5 v" O8 L3 {1 |& c & P# T9 p* S/ I- p8 g4 x大概意思是8 - 10的每一段;2 - 3双棘 外骨骼非常多刺; M1 ~" c. f3 C3 c9 h4 A# ]( Y
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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