Page 323 - Introduction to Paleobiology and The Fossil Record

310 INTRODUCTION TO PALEOBIOLOGY AND THE FOSSIL RECORD

(a) (b)
Vs Vs
Co

Ds
B

Dva
Vva
Dva
Vs Vva
Um?
Pc
Pc

(d)

(c)

St
A
B Dd

Dt
Dva

Vva

Pc

Ct Ct

Figure 12.10 Chinese lingulides: Reconstruction of the Chengjiang lingulid Xianshanella. A, anal
opening; B, brachial arm; Co, cone-like organisms; Ct, cheek of trilobite; Dd, digestive tract; Dva,
dorsal visceral area; Pc, pedicle cavity; St, stomach; Um?, possible umbonal muscle; Vs, setae
fringing ventral valve; Vva, ventral visceral area. Scale bars, 2 mm. (From Zhang et al. 2006.)