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.
Physical Description. Adult dragonflies have long, thin, needle-like bodies, which is why they're sometimes referred to as devil's darning needles. All species have six legs, two pairs of wings, disproportionately large eyes, short thoraxes and long abdomens that are split into 10 segments.