- Test of moderate size, high with low, rounded ambitus.
- Apical disc moderately large, about one-third of test diameter. Hemicyclic, with oculars I and V insert. Genital plates triangular and radially elongated.
- Ambulacra narrow and slightly inflated adapically. Plates trigeminate, compounding in acrosaleniid style. All elements similar and reaching the perradial suture. Ambuacral primary tubercle uniting two of the three plates and with granules only on third element, adapically. At ambitus the primary tubercle can overlap all three elements in a triad. Pore-pairs uniserial adapically and adorally. A very weak phyllode development is developped adoral (involving 3-4 pore pairs).
- Interambulacral zones wide with large primary interambulacral tubercle flanked by one or two prominent secondary tubercle on either side and slightly higher in larger individuals. Remainder of plate covered in sparse granules.
- Tubercles non-crenulate and imperforate; areole never sunken.
- Buccal notches present but relatively small.
- Lantern supports, lantern and spines unknown.
||Early Albian of Brazil.
||Cuscuzispina riachuelensis Manso & Souza-Lima, 2011, by original designation.
||Only the type.
|Classification and/or Status
||Acroechinoidea, Carinacea, Orthopsidae.
||Cuscuzispina differs from Orthopsis by its higher corona, hemicyclic apical disc with narrower and longer genital plates and its adapically inflated ambulacra. From Pseudorthopsis it differs by its higher corona and its straight poriferous zones (oblique triads in Pseudorthopsis).
Manso, C. L. d. C. & Souza-Lima, W. 2011. New genus and new species of echinoid (Echinodermata, Orthopsidae) from the Albian (Lower Cretaceous) of Sergipe-Alagoas Basin, Brazil. Arquivos do Museu Nacional 68 (for 2010), 41-46.