New ophiacanthid brittle stars (Echinodermata: Ophiuroidea) from the Upper Triassic of Japan: first insights into the origin and evolution of an extant deep-sea group

B. Thuy, Y. Ishida, E. Doi, and A. Kroh

2013

Article

Journal of Systematic Palaeontology 11:515-530

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Taxa discussed in this work:

• Leadagmara
• Leadagmara gracilispina

Taxonomy:

• Ophiacanthidae belongs to Ophiurina - Thuy et al. (2013)
• Ophiurina belongs to Ophiurida - Thuy et al. (2013)
• Leadagmara belongs to Ophiacanthidae - Thuy et al. (2013)
• Leadagmara gracilispina belongs to Leadagmara - Thuy et al. (2013)