sentence: Many graptolite fossils resemble hieroglyphs written on the rock.
sentences_before: The name graptolite comes from the Greek 'graptos', meaning 'written', and 'lithos', meaning 'rock'.
sentences_after: More recent work places them near the 'pterobranchs', possibly within.
concept_name: graptolite fossil
headings: Hemichordata Graptolites