The Echinoid Directory

• Test small, subglobular.
• Apical disc ethmophract with two, occasionally three gonopores (gonopores usually in G1 and G3 - no gonopore in genital plate 4); anterior of centre.
• Ambulacra all flush; plates large and hexagonal aborally; bearing microscopic pores only. Those in anterior ambulacrum larger and paired.
• Posterior two ambulacra meet adapically so that interambulacrum 5 does not reach apical disc.
• Peristome ovate, facing downward; far removed from anterior border.
• Labral plate elongate, extending to start of amb plate 2. Sternal plates narrow; only slightly longer than labral plate. Episternal plates biserially offset.
• Amb plate 4 abuts rear of episternals.
• Periproct small; on posterior truncate face; well above mid-height in posterior view. Oral side of periproct framed by plates 5a/6b.
• Subanal fasciole present; passing over suture between 5.b.2/5.b.3 and over the rear of 5.a.2. Shield-shaped.

Late Eocene, Cuba.

Habanaster sanchezi Lambert, in Sanchez-Roig, 1924, p.11, by original designation.

• Only the type species.

Spatangoida, Micrasterina, Micrasteridae, Ovulasterinae.

Monotypic.

Kier (1984) provides a detailed description of this species. In Habanaster the subanal fasciole passes over the suture between 5.b.2/5.b.3 and over the rear of 5.a.2. as in all Micrasteridae. It differs from Turanglaster in having a more elongate labrum that only just reaches ambulacral plate 2. In Turanglaster the labrum extends to ambulacral plate 4 and the plastron plating is much more primitive in arrangement.

Kier, P. M. 1984. Fossil spatangoid echinoids of Cuba. Smithsonian Contributions to Paleobiology 55, 1-336.

Sanchez Roig, M. 1924. Nuevas especies de equinidos fosiles cubanos. Memorias de la Sociedad cubana Historia natural Felipe Poey 6(2), 75-92, pls 8-14.