原文Introduction: typically very spinose and densely sculptured trilobites. 3 ?4 M7 e. C0 P" V' _8 K
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. . ?" R1 `& r. ZThorax: 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. / o! a6 N/ Z' d) X
Pygidium: 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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6 q( T) A6 R! G3 B0 p/ g ; W, x, m$ b5 x! i; L大概意思是8 - 10的每一段;2 - 3双棘 外骨骼非常多刺( E W$ T- O/ }7 [: @$ c
- s. ?7 ]& c2 n% I! u& K7 \ * _. P: Y: D( H X ( p& R" X1 q& `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