You are here:

The Echinoid Directory

Family Lepidocentridae Loven, 1874, p. 39

Diagnosis	Stem group echinoids with: test composed of ambulacral and interambulacral plates; plating thin and strongly imbricate ambulacral zones narrow and plating biserial; pores double and adradial internal perradial flanges on ambulacral plate enclose the radial water vessel interambulacra composed of small rhomboidal plates forming rows and columns small mamelonate tubercle on interambulacral plates.
Range	Lower Silurian (Llandovery) to Upper Carboniferous, USA, Europe.
Remarks	Kier (1966) included in this family all forms with imbricate test plating and only two columns of amb plates. The type species of the type genus is very poorly known, however, making diagnosis of this family difficult. The following genera are probably members of this family but are based on such inadequate material as to be nomina dubia: Lepidocentrus Muller, 1857 Koninckocidaris Dollo & Buisseret, 1888 Lepidechinoides Olssen, 1912

Diagnosis

Stem group echinoids with:

test composed of ambulacral and interambulacral plates; plating thin and strongly imbricate
ambulacral zones narrow and plating biserial; pores double and adradial
internal perradial flanges on ambulacral plate enclose the radial water vessel
interambulacra composed of small rhomboidal plates forming rows and columns
small mamelonate tubercle on interambulacral plates.

Range

Lower Silurian (Llandovery) to Upper Carboniferous, USA, Europe.

Remarks

Kier (1966) included in this family all forms with imbricate test plating and only two columns of amb plates. The type species of the type genus is very poorly known, however, making diagnosis of this family difficult.

The following genera are probably members of this family but are based on such inadequate material as to be nomina dubia:

Lepidocentrus Muller, 1857

Koninckocidaris Dollo & Buisseret, 1888

Lepidechinoides Olssen, 1912