Tripneustes ventricosus Lamarck 1816

Family: Toxopneustidae

Order: Echinoida

Locality: USA, Florida, Beach drift, 2007

Dimensions: 98 x 58 mm
Peristome: 28 mm

One row of pore pairs is interrupted in a slightly deformed region above the ambitus.

 

 

Locality: Puerto Rico, Toa baja
2009

Dimensions: 96 x 68 mm
Peristome: 21,5 mm

Pentagonal form

Remark: The peristomes have conspicuously different diameters, although the outer diameters are nearly the same.

 

Locality: Puerto Rico , Toa baja
2009

 

Dimensions: 97 x 62 mm
Peristome: 22 mm

Rounded form