COMMON CLASSES AND ORDERS OF
ARTHROPODA V: CLASS INSECTA
•This is by far the largest class of arthropods –
estimated 750,000-1 million+ species worldwide
• Ranging from wingless silverfish to the ants, bees
and wasps
•Found in nearly every terrestrial habitat; also, some
in/on fresh water
•Metamorphosis varies from ‘none’ to ‘simple’ to
‘complete’
•Adults commonly winged; still, some cannot fly
(wings too small or secondarily absent) or do not fly
Class Insecta, (As Adults*, That Is)
• There are 19 Orders of
insects in Your List
• *The Arthropod ID Quiz
will ONLY feature ADULT
arthropods.
Photo: D.B. Richman, NMSU
Photo: D.B. Richman, NMSU
Photo: D.B. Richman, NMSU
Class Insecta
• Pay attention to the insect’s ‘antennal type’ which
can be useful for identification; they can vary by
Order & sometimes within an Order
CAPITATE
Diagram: bugguide.net
Class Insecta
•Order Thysanura – Silverfish
•Metamorphosis: None
Mouthparts: Chewing
Photo: Univ. Minnesota Extension
Class Insecta
•Order Odonata – Dragonfly
•Metamorphosis: Simple
Mouthparts: Chewing
All Photos: D.B. Richman, NMSU
Class Insecta
•Order Odonata – Damselfly
•Metamorphosis: Simple
Mouthparts: Chewing
All Photos:
D.B. Richman, NMSU
Class Insecta
• Order Phasmatodea – Walkingstick
•Metamorphosis: Simple
Mouthparts: Chewing
Photo: D.B. Richman, NMSU
Class Insecta
• Order Orthoptera – Short-horned Grasshopper
•Metamorphosis: Simple
Mouthparts: Chewing
Photo: D.B. Richman, NMSU
Class Insecta
• Order Orthoptera –Long-horned Grasshopper
•Metamorphosis: Simple
Mouthparts: Chewing
Photo: D.B. Richman, NMSU
Class Insecta
• Order Orthoptera –Cricket
•Metamorphosis: Simple
Photo: D.B. Richman, NMSU
Mouthparts: Chewing
Class Insecta
• Order Orthoptera - Camel Cricket
• Metamorphosis: Simple
Mouthparts: Chewing
Uga5369804
Photo: W Cranshaw, CO State Univ, bugwood.org
Photo: David Cappaert, MI State Univ, bugwood.org
Class Insecta
• Order
Orthoptera – Jerusalem Cricket
•Metamorphosis: Simple
Mouthparts: Chewing
Photo: D.B. Richman, NMSU
Class Insecta
• Order Dermaptera – Earwig
•Metamorphosis: Simple
Mouthparts: Chewing
Photo: D.B. Richman, NMSU
Class Insecta
• Order Mantodea – Mantid
•Metamorphosis: Simple
Mouthparts: Chewing
Photo: D.B. Richman, NMSU
Class Insecta
Order Phthiraptera – Sucking Louse (Lice, plural)
•Metamorphosis: Simple
Mouthparts: Sucking
Cattle tail louse.
Human head louse
Both photos:
MC Pereira, ICB,
Univ Sao Paulo, Brazil
Class Insecta
• Order Phthiraptera, Chewing Louse (Lice, pl.)
• Metamorphosis: Simple Mouthparts: Chewing
Chicken feather louse
Tamu.edu
Deer louse
KS Dept Ag PDIS Org image lib
Chicken body louse
MC Pierera icb usp brazil
Class Insecta
• Order Isoptera – Termite
•Metamorphosis: Simple
Mouthparts: Chewing
A) Wingless reproductive (adult)
B) Winged reproductives (adults)
C) Worker termites are actually nymphs
A)
Photo: PJBryant, UCIrvine Entomology
B)
Photo: Univ Kentucky Entomology
C)
Photo: D.B. Richman, NMSU
Class Insecta
• Order
Blattodea – American Cockroach
•Metamorphosis: Simple
Mouthparts: Chewing
Photo: D.B. Richman, NMSU
Class Insecta
Order Blattodea - German Cockroach
Metamorphosis: Simple
Mouthparts: Chewing
Photo: Univ. Nebraska-Lincoln, Dept. Entomology
Class Insecta
• Order Blattodea - Oriental Cockroach
• Metamorphosis: Simple
Mouthparts: Chewing
Photo: Univ. Nebraska-Lincoln, Dept. Entomology
Class Insecta
Order Thysanoptera – Thrips (both sing. & pl.)
Metamorphosis: Simple Mouthparts: Sucking & Chewing
Palm thrips, Thrips palmi.
Photo: Plant Protection Service Archive, Plant Protection
Service, Bugwood.org
Onion thrips (L), Western flower thrips (R)
Photo: Alton N. Sparks, Jr., University of Georgia, Bugwood.org
Next……
• The ‘True Bugs’---Hemiptera
Photo: D. B. Richman, NMSU
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Arthropods- Thysanura Thysanoptera