The Echinoid Directory

• Test ovate with shallow but distinct anterior sulcus; posterior face truncate. Test depressed in profile.
• Apical disc ethmolytic with four gonopores; central.
• Anterior ambulacrum weakly depressed adapically; groove continuing to peristome. Pore-pairs small and undifferentiated.
• Paired ambulacra petaloid aborally; weakly bowed. The anterior pair widely divergent and with the general region slightly depressed though not forming a distinct furrow. The posterior petals longer and flush.
• Peristome large and D-shaped; downward-facing.
• Plastron plating not described; appears to have elongate labrum and short triangular sternal plates.
• Periproct large; on posterior truncate face.
• Subanal fasciole present; bilobed.
• Narrow peripetalous fasciole present; not indented behind anterior petals.
• Aboral tuberculation heterogeneous.

Eocene, Egypt, Spain; ?Miocene, Mediterranean.

Euspatangus libycus de Loriol, 1881, p. 52 by original designation.

• Fourtau included just two species when erecting this genus, P. lybicus (de Loriol) and P. hispaniae (Cotteau).
• May also include the species of Mazettia.

Spatangoida, Micrasterina, Maretiidae.

?Subjective junior synonym of Eupatagus or Mazettia.

Fourtau distinguished this genus on account of its having the anterior paired petals set in a slight depression and the posterior petals flush. If the illustrations are to be believed, it can be distinguished from the closely related Eupatagus by its shallow but distinct anterior sulcus. It appears close to Mazettia in all details that are known and may be synonymous.

Fourtau, R. 1905. C. R. Assoc. France., avance. sci. [1904], p. 605.