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The Sea urchins of the Northern Gulf of California are in the Gulf of California habitats, located between the coasts of the Baja California Peninsula to the west and mainland state of Sonora, Mexico to the east. The northern boundary is the lateral band of land with the remains of the Colorado River Delta, and the southern is the Pacific Ocean. The Gulf of California is known for its high diversity and endemism of biota. One type of marine animal that can be found in this region is the sea urchin (class echinoidea, in the phylum echinodermata). ==Introduction== Approximately 23 species of sea urchins, 3 species of heart urchins, and 9 species of sand dollars call the Northern Gulf of California habitat their home. Where they are found throughout the Gulf of California, can be classified into three biogeographic regions called the Northern Gulf, Central Gulf, and Southern Gulf. Two other regions are also used to classify sea urchins and other marine animals, and are called the Southwest Baja California Sur Region and the Colorado River Delta Biosphere Reserve ( (Upper Gulf of California and Colorado River Delta Biosphere Reserve ) ). (''As recognized by the Center for Sonoran Desert Studies at the Arizona-Sonora Desert Museum'') 〔http://www.cedointercultural.org/uppergulf.htm . accessed 7/4/2010〕 One echinoid, ''Mellita granti'', is a Sea urchin endemic to the Gulf of California.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sea Urchins of the Northern Gulf of California」の詳細全文を読む スポンサード リンク
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