Coscinodiscus concinnus is a species of diatoms in the family Coscinodiscaceae. It is native to Pernambuco, Rio de Janeiro, Rio Grande do Sul, Santa Catarina, São Paulo, Pará, Amapá, Maranhao, and Paraná. Coscinodiscus concinnus form siliceous oozes. It is a photoautotroph. Individuals can grow to 110 µm.
EOL has data for 18 attributes, including: