Graptoloids 0.0 / 5 ? GeologyGraptoloidsA2/A-levelOCR Created by: HannahCavielCreated on: 08-03-17 11:53 89421375610 Across 1. when did graptolites become extinct? (8) 4. thecae became more .......... through evolutionary time (7) 6. individual cup where one zooid lived (5) 10. thecae are added downwards from the sicula (7) Down 2. when did graptolites first appear? (10) 3. spine at the end of the sicula (8) 5. part where the zooid protruted (8) 7. a thin tube, an extension of the sicula (4) 8. a branch of the rhabdosome (5) 9. Ordovician first graptolite (12)
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