Comparative Studies of Recent and Fossil Echinoid Jacksonaster depressum (L. Agassiz) from the Northern Bay of Safaga, and Late Pliocene rocks, Red Sea coast, Egypt.
STATISTICAL CORRELATION, ONTOGENETIC DEVELOPMENT AND SEXUAL DIMORPHISM HAVE BEEN STUDIED IN RECENT AND FOSSIL SPECIMENS OF JACKSONASTER DEPRESSUM (L. AGASSIZ, 1841). A LARGE NUMBER OF DEAD AND LIVING TESTS OF THIS SPECIES HAVE BEEN COLLECTED FROM BOTTOM SEDIMENTS OF THE SAFAGA BAY, RED SEA, EGYPT. OUT OF TWO HUNDRED SPECIMENS, ONE HUNDRED AND SEVENTY SEVEN (20 LIVING AND 157 DEAD, ... Read more