Psychotic disorders are severe mental disorders that cause abnormal thinking and perceptions. People with psychoses lose touch with reality. Two of the main symptoms are delusions and hallucinations.
How many dragonfly species are there? Answer: The actual number of described species of Suborder Anisoptera (dragonflies) at this time is 2,874. The Suborder Zygoptera (damselflies) consists of about 2,698 species, and the Suborder Anisozygoptera contains only 2 species. Thus, there are 5,574 recognized species of odonates at the present time.
(order Odonata, suborder Anisoptera, family Aeshnidae) All dragonfly nymphs are predators. Aeshnid nymphs are sensitive to movement and chase their prey. Nymphs mostly occur in still waters, but can be found in slow flowing parts of rivers and streams as well.