Figure 9

Jurassic thylacocephalan Clausocaris lithographica . A-C. SMNS 70193/2. A. Overview. B. Series of trunk appendages with preserved setae. C. Color-marked version of part of B, showing the setae. D. SMNS 67901. Close up of trunk region; note the distinct arrangement of muscles: in each segment a short muscle is followed by a long muscle which appears to extend into the appendages. E-G. SMNS 70193/4. E. Overview. F. Close up of paddle-shaped appendage, setae color-marked. G. Same as in F, without color-markings. Abbreviations: ce = compound eye; lm = long muscles; ma = muscle attachment areas; pa = paddle-shaped appendages; ra = raptorial appendage; sh = shield; sm = short muscles; so = shield outline; sr = serrations; st = setae; tr = trunk.