The angle described by the adoral
spiral was also observed.
Phylogenetic history of two sea urchin larval structures: the apical sensory organ and the adoral
Wet mounts from the specimens preserved in 5% formalin solution were studied for the observation of adoral
They have eight ciliated membranous structures including four oral one undulating and three adoral
setae (cs) and subcapitular setae (bs) of similar length (c.
Lateral lips with two pairs of setiform, barbed adoral
setae (or1, or2, 10-12).
Tres contornos de cilios estan presentes, dos de ellos en espiral en la zona adoral
y el otro en el borde apical; estos ultimos son utilizados para la locomocion, permitiendole al protozoo una activa motilidad.
Shape of the adoral
primary tubercles of interambulacra 2 and 3.
formosa consists of three pairs of characteristic adoral
setae; the movable digits orifice were clearly visible (Figure 4).
Subcapitular setae m 14 (15), n 12 (13), adoral
setae or1 11 (11), or2 14 (13); distances: mm 21 (22), nn 22 (21), mn 12 (11), or1or1 13 (12), or2or2 16 (17), or1or2 3 (2-3) (Fig.
Thus far, no study has looked at the effects of acidified conditions on the youngest test plates (on the adoral
side of the test) which could be more prone to etching, although it is not known if ACC is involved in the formation of these plates.
Each ambulacrum and interambulacrum has an "adapical" end (at the apical system) and an "adoral
" end (at the peristome).