The Echinoid Directory

Family Loveniidae Lambert, 1905, p. 34

Diagnosis

 Micrasterine spatangoids with:

  • ethmolytic apical disc;
  • petals flush; the anterior petals tapered distally with wide perradial zone and with pore-pairs in the anterior column reduced adapically;
  • lateral ambulacral zones on oral surface pinched between adoral phyllodes and ambitus;
  • labral plate elongate and wedge-shaped; extending at least to rear of second ambulacral plate or beyond;
  • sternal plates short and triangular;
  • episternal plates paired and opposite as are the next pair of plates (5.a.4, 5.b.4); episternal plates only moderately indented to rear by ambulacral plate 5;
  • subanal fasciole present; usually bilobed but occasionally shield-shaped.
Range
Late Eocene to Recent; world-wide, low to mid latitudes.
Remarks

 Very similar to Maretiidae but with a bilobed rather than shield-shaped subanal fasciole and wider, less strongly tapered episternal plates. Although an inner fasciole is present in many not all genera that are included have this. Echinocardiidae differ in having a much shorter labral plate and larger, more ovate sternum, in having episternal plates forming the lower part of the posterior face, not the rear part of the oral face and in having a shield-shape subanal fasciole. Spatangidae have a short labral plate and parallel-sided sternal zone.

The following taxon may belong here but is too poorly known to include in the key below:

Laevipatagus Noetling, 1885

Verbeekia Fritsch, 1877 (probably a Lovenia)