The Echinoid Directory

Contributed by Jenna Sullivan, May 2007

Echinolampas posterolatus Gregory, 1891, p. 609

Diagnostic Features "Elliptical form, well rounded; widest at the posterior part of the postero-lateral interradii; highest point coincident with the apical system. The anterior slope is short and curved, the posterior is long and gradual. Apical system excentric anteriorly; four genital pores. Ambulacra petals long, extending more than two-thirds of the distance to the ambitus. In the anterior the interporiferous area is narrow and the left poriferous zone the shorter. In the antero-lateral petals the interporiferous area is wide, owing to the curve of the posterior poriferous zone; the anterior zone is straighter and shorter. In the postero-lateral pair the anterior poriferous zone is the longer and more curved. The postero-lateral interradii pair occupy an exceptionally large amount of lateral margin. The posterior interradius is depressed. Mouth in a deep depression, before the centre. Anus transversely oval, almost marginal." (from Gregory 1891)
Distribution Lower Coralline Limestone (Upper Oligocene) of Malta.
Type Holotype: Natural History Museum E1865.
Classification and/or Status Species of Echinolampas.
Remarks Differs from Echinolampas scutiformis (Leske) in a more depressed form, the anterior position of the apical disc, and the absence of the rostrum. May be distinguished from E. suessi (Laube) in that E. suessi has a more central position of the apical disc. (from Gregory, 1891)

Gregory, J. W. 1891. The Maltese Fossil Echionoidea, and their Evidence on the Correlation of the Maltese Rocks. Transactions of the Royal Society of Edinburgh, 36(3, No. 22): 609.