Prorocentrum

Japanese: プロロケントルム（英語表記）Prorocentrum

A genus of unicellular dinoflagellates that swim with two flagella protruding from the front end of a spherical or elliptical body formed by joining two hemispherical or dish-shaped shells. They live a planktonic life in the ocean. One of the two flagella extends forward, while the other either wraps around the cell body or extends to the side. There are one or two brown plastids inside the body, and the nucleus is relatively large. The only known method of reproduction is asexual binary fission, and they often multiply in large numbers in inland bays, causing red tides. In the past, species with spiny protrusions at the front end of the cell were called Prorocentrum , while those without were called Exuviaella , but now many scholars treat the two as the same genus.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

2個の半球状または皿状の殻状部が左右に合わさってできた球形ないし楕円形の体の前端から，2本の鞭毛を出して泳ぐ単細胞性の渦鞭毛藻綱の1属。海洋で浮遊生活をする。2本の鞭毛のうちの1本は前方にのびるが，他の1本は細胞体を巻くか，または側方にのびる。体内には1～2個の褐色の色素体があり，核は比較的大きい。生殖には2分裂の無性生殖のみが知られ，内湾域などでしばしば大繁殖して赤潮を出現させる。細胞前端にとげ状突起をもつものをProrocentrum，もたないものをExuviaellaとして以前は区別したが，現在は両者を同一属に扱う学者が多い。

出典　株式会社平凡社世界大百科事典第２版について　情報

<<: Browaria - Browaria

>>: Phloroglucin