what was the body plan of the acanthodians ?

A

Alonzo

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What was the body plan of the acanthodians?
The body was elongate and had a pair of pectoral fins, an unpaired dorsal fin far back on the body, with an unpaired long ventral/pelvic fin and an anal fin on the underside of the body, which like other acanthodians were supported by stiff spines at their front edges.
 
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