Cyclostigma

This article is about the genus of extinct lycophytes. For other plant genera, see § Taxonomy.

Cyclostigma is a genus of extinct plants belonging to the Lycopodiopsida (lycopsids).

Cyclostigma Temporal range: Emsian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Lycophytes
Class:	Lycopodiopsida
Genus:	†Cyclostigma Haught., nom. cons.[1]

Taxonomy

Cyclostigma Haught. was first used by Samuel Haughton in 1859 for the type species C. kiltorkense.^[1] The name Cyclostigma has been used for a genus no fewer than four times. Three are synonyms:

• Cyclostigma Hochst. ex Endl. is a synonym of Voacanga Thouars.^[2] This is the oldest name, dating from 1842, and so would normally have priority but Cyclostigma Haught. has been conserved against it.^[1]
• Cyclostigma Klotzsch is a synonym of Croton L.^[3]
• Cyclostigma Phil. is a synonym of Leptoglossis Benth.^[4]

Hao and Xue in 2013 listed Cyclostigma as a lycopsid.^[5]