The Echinoid Directory

Deakia Pavay, 1875, p. 152

Diagnostic Features
  • Test ovate with distinct anterior sulcus; posterior face truncate. Test subconical in profile.
  • Apical disc with four gonopores; central. Plating uncertain.
  • Anterior ambulacrum sunken throughout with groove deepening towards ambitus. Pore-pairs small or rudimentary.
  • Paired ambulacra petaloid aborally. Petals narrow and parallel-sided; sunken; not reaching ambitus. Anterior petals weakly flexed anteriorly. Posterior and anterior petals similar in length.
  • Peristome close to anterior border and inclined slightly towards frontal groove. Kidney-shaped.
  • Plastron plating with short wide labral plate (apparently no longer than the first ambulacral plate). Sternal plates large and fully tuberculate.
  • Periproct on posterior truncate face; possibly slightly undercut (test crushed).
  • Subanal fasciole present; bilobed.
  • Peripetalous fasciole present; thin and distinctly indented behind anterior petals.
  • Tuberculation slightly coarser inside peripetalous fasciole and heterogeneous aborally.
Distribution
Eocene of Europe.
Name gender feminine
Type
Deakia rotundata Pavay, 1875, p. 154, by subsequent designation of Lambert 1920, p. 172.. [Pavay included three species D. rotundata sp. nov., D. ovata sp. nov. and D. cordata sp. nov.]
Species Included
  • D. rotundata Pavay 1874; Eocene, Hungary.
  • Lambert & Thiery list 8 other species, but it is not clear how many are closely related.
Classification and/or Status

Spatangoida, Micrasterina, Brissidae.

Possibly a junior subjective synonym of Schizobrissus Pomel, 1869.

Remarks
Although poorly known, it does not appear to differ from Schizobrissus Pomel, 1869, in any significant way. It differs from Macropneustes Agassiz, 1847, in having narrower and more sunken petals, a shorter labral plate and an indented peripetalous fasciole.

Pavay 1875. Magyar Foldtani Intézet Evkiin 3, p. 304.

Lambert, J. 1920. Actes de la Societe Linnee de Bourdeaux 71, p. 172.