The Echinoid Directory

• Test ovate with anterior sulcus at ambitus; depressed in profile with flattened base and top.
• Apical disc ethmolytic, with 4 gonopores (rarely with three); positioned markedly anterior of centre.
• Anterior ambulacrum rather narrow and deepening adambitally; pore-pairs and tube-feet simple and unspecialized.
• Other ambulacra subpetaloid and flush. Weakly bowed adapically, but otherwise parallel. Pore-pairs conjugate with no sharp termination of petals towards ambitus.
• Periproct on short vertical truncate face. Hardly invaginated.
• Peristome wider than long; kidney-shaped; facing predominantly downwards.
• Labral plate narrow and elongate; only just contacting sternal plates; extending to third ambulacral plate. Paired sternal plates narrow and triangular with tuberculation confined to small posterior part only.
• Aboral tuberculation heterogenous with scattered coarse tubercules in anterior and lateral interambulacrum. Primary tubercles sunken in camellae; with smooth parapet saround mamelon.
• Small aligned tubercles inside the inner fasciole adapically.
• Oral tubercles prominent laterally and arranged in distinct rows. Areoles large, sunken and ear-shaped with parapet helically spiraled.
• Well-developed bilobed subanal fasciole and inner fasciole. Subanal fasciole encloses 5 ambulacral plates on each side.

Recent, Hawaii & Japan.

350-1265 m.

Pseudolovenia hirsuta Agassiz & Clark, 1907, p. 255, by original designation.

• Only the type species.

Spatangoida, Micrasterina, Loveniidae.

Monotypic.

Differs from Lovenia only in having sub-petaloid ambulacra. In Pseudolovenia the pore-pairs in the posterior petals gradually merge into ambital pore-pairs without any sharp break.

Agassiz, A. & Clark, H. L. 1907. Preliminary reports on the Echini collected in 1902, among the Hawaiian Islands, by the U. S. Fish Commission steamer “Albatross”, in charge of Commander Chauncey Thomas, U. S. N. commanding. Bulletin of the Museum of Comparative Zoology, Harvard College, 50, 231-259.

Mortensen, T. 1951. A Monograph of the Echinoidea. V. Spatangoida 2. C. A. Reitzel, Copenhagen.