monograptid
/ˌmɒnə(ʊ)ˈɡraptɪd/Palaeontology
adjective
Of, relating to, or designating graptolites of the Silurian and Devonian family Monograptidae, characterized by a single series of thecae in each rhabdosome.
noun
A graptolite of the family Monograptidae.
Origin
Late 19th century; earliest use found in Science. From scientific Latin Monograptidae, family name from Monograptus, genus name from mono- + Hellenistic Greek γραπτός marked with letters; in ancient Greek ‘painted’: see graptolite) + -idae.