When mouth and anus are centrally placed at the opposite poles of the test (i.e. oral-aboral pole), then the forms in Echinoids are known as:
A. Irregular Echinoids
B. Peristome Echinoids
C. Regular Echinoids
D. Periproct Echinoids
Answer:C
When mouth and anus are centrally placed at the opposite poles of the test (i.e. oral-aboral pole), then the forms in Echinoids are known as:
A. Irregular Echinoids B. Peristome Echinoids C. Regular Echinoids D. Periproct Echinoids