جستجوی مقالات مرتبط با کلیدواژه "echinoidea" در نشریات گروه "محیط زیست"

The 800 species of echinoids alive today, coupled with the wonderful fossil record, make the echinoids excellent candidates for a great variety of studies, from reproductive biology to evolution. The irregular echinoid Clypeaster Lamarck is locally common in Oligocene to Quaternary sedimentary deposits in the Caribbean region. Clypeaster, seen from the post-Eocene epoch. Clypeaster humilis; is such a class of Echinoidea that this species seen in the Persian Gulf but Iranian waters. This species resembles C. humilis (LESKE, 1778) a living species of the Persian Gulf in Arabia coastal and Red Sea but the present paper recorded from Hendorabi Island for the first time. The species is widely distributed in tidal and shallow waters of tropical and subtropical regions. Clypeaster humilis, ranging from the Persian Gulf, in depth of sandy-soft sediments to about 10-15 meters.

This study touches on identification of species of Echinoidea (Echinodermata) in the intertidal zones of Chabahar Bay in the Oman Sea during November 2008 to September 2009. The area of study was at the farthest end of south east of Iran from 25° 16´ 61״ N to 25° 22׳ 47״ N and from 60°39׳ 90״ E to 60° 24׳ 38״ E. Sampling was done bimonthly during low tide from 5 stations, using 1m×1m quadrate randomly. Then, samples were counted, identified. The results showed that 4 species of Echinodermata from class of Echinodea and 4 orders Clypeasteroidea, Diadematoida, Echinoidea, Phymosomatoida and 4 families as Clypeasteridae, Diadematidae, Echinometridae, Stomopneustiae including: Clypeaster humili, Diadema setosum, Echinometra mathaei, Stomopneustes variolaris.