What is "rhigospira"

Rhigospira is a genus of flowering plants in the family Apocynaceae, first described as a genus in 1849. The genus contains only one known species, Rhigospira quadrangularis, native to northwestern South America ( Colombia, Venezuela, Peru, NW Brazil).

• Rhigospira paucifolia (Müll.Arg.) Miers = Macoubea guianensis Aubl.
• Rhigospira reticulata (A.DC.) Miers = Macoubea guianensis Aubl.
• Rhigospira sinuosa Miers = Macoubea guianensis Aubl.
• Rhigospira sprucei (Müll.Arg.) Miers = Macoubea sprucei (Müll.Arg.) Markgr.
• Rhigospira ternstroemiacea (Müll.Arg.) Miers = Neocouma ternstroemiacea (Müll.Arg.) Pierre
• Rhigospira venulosa Miers = Spongiosperma macrophyllum (Müll.Arg.) Zarucchi