• Length: mm

 • Description:

Three terminal feet on the mouth of the abdomen, without lateral ribs.

 • Pictures:

 • Links:

• Theocyrtida images (by E.Haeckel, from the Kurt Steuber's Online Library)
• Thyrsocyrtis - from Technical Note on Cenozoic Radiolarian Stratigraphy (by Catherine Nigrini and Annika Sanfilippo), Ocean Drilling Program, Texas A&M University.