Order Protura
Some Metamorposis Types
•anamorphosis – metamorphosis in which the immature stages have
fewer abdominal segments that the adults
•epimorphosis – metamorphosis in which all of the segments are
differentiated in the embryo before hatching
•complete – development in which there is a pupal stage (=
holometabolous)
•incomplete (or simple) – development in which there is no pupal
stage
•ametabolous – “without” metamorphosis; characteristic of
primitively wingless insects that emerge from the egg in essentially
adult form except for the size and development of the genitalia
•paurometabolous – metamorphosis without a pupal stage and
with terrestrial immatures that closely resemble the adult in general
body form (= gradual metamorphosis)
•hemimetabolous – metamorphosis without a pupal stage, but
with aquatic immatures that differ significantly in body form from the
adult
Protura (head)
•antennae absent
•eyes absent
•ocelli absent
pseudoculus
mouthparts
Protura (thorax)
• wings absent
tarsus
1-segmented
meso- & metathoracic
spiracles & tracheae
(some families))
Protura (abdomen)
abdomen
12-segmented in
adults
abdominal styli
Protura (biology/ecology)
Protura (fauna)
World Fauna
• 4 families
• 500 species
North American Fauna
• 3 families
• Eosentomidae (lab)
• Protentomidae
• Acerentomidae
• ca. 20 species
Order Protura
FINIS