|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Pterobranchia - Bireclinata - Retiolitidae
It was reranked as Diplograptus (Glyptograptus) by Elles and Wood (1907).
It was assigned to Diplograptus by Elles and Wood (1907); to Glyptograptinae by Mitchell (1987); to Graptoloidea by Sepkoski (2002); and to Petalolithinae by Melchin et al. (2011).
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|C. E. Mitchell 1987||Species with glyptograptid to climacograptid thecae having relatively narrow geniculum and nearly straight supragenicular wall; proximal end generally narrow and fusiform, with strongly alternating thecae; generally septate with straight median septum and th21 or some later theca dicalycal, but may be aseptate; sicula simple, generally short and broad, lacking antivirgellar spines.|
|M. J. Melchin et al. 2011||The partial clade that includes the first
species that acquired a unistipular (aseptate) biserial rhabdosome
in the clade that contains Paramplexograptus madernii
and Retiolites geinitzianus and its descendants, but excluding
the taxa included in the Subfamily Retiolitinae.