Transcript ephemeroptera-odonata-plecoptera.ppt

A quick review….
Classification
Kingdom
Phylum
Class
Animalia
Arthropoda
Insecta
Phylum Arthropoda
Bilateral Symmetry
Jointed Appendages
Exoskeleton
Segmented Body
Specialized Appendages
Class Insecta
3 Body Regions: head, thorax, abdomen
1 Pair of Antennae
3 Pairs of Legs when present
Terminology
Apterygote: Lacking wings
Pterygote:
Primitively bear wings (may be
secondarily lost)
Paleoptera: Lacking ability to flex wings
over back at rest
Neoptera:
Able to flex wings over back at
rest
Orders
Ephemeroptera
Odonata
Plecoptera
Order Ephemeroptera
Ephemera-: for a day, short lived; -ptera: wings
(Refers to the short lives of the adults)
• Incomplete metamorphosis:
- Hemimetabolous
(immatures are aquatic)
• Pterygote
• Paleoptera
Order Ephemeroptera
(Mayflies)
Adult
Naiad
Order Ephemeroptera
• Compound eyes LARGE
• Antennae SHORT and FILIFORM
• Front legs LONG
• Two pairs of membranous wings;
forewings large and triangular,
hind wings small and rounded
• Abdomen with two long cerci and usually
with a median caudal filament
Importance
• Ecological indicators of good water quality
• Important source of food for fish,
amphibians, birds, and other insects
• Often used as bait for fishing (duns and
spinners)
Order Odonata
From the Greek, meaning tooth
(referring to the teeth on the mandibles)
Dragonflies and Damselflies
Order Odonata
• Incomplete metamorphosis:
- Hemimetabolous
(immatures are aquatic)
• Pterygote
• Paleoptera
Order Odonata
• Compound eyes LARGE, often
occupying most of the head
• Antennae SHORT and BRISTLE-like
• Twp pairs of elongate membranous
wings of similar size
Odonata Suborders:
Anisoptera
(Dragonfly)
Zygoptera
(Damselfly)
Anisoptera
• Robust Body
Vs.
Zygoptera
• Slender Body
• Wings held horizontally
• Wings held vertically
• Hind wings broad at base
• Hind wings narrowed at base
• Eyes large, often touching
• Eyes smaller and separated
Importance
Naiads (immatures) and adults are predaceous
and feed on small insects like mosquitoes.
Order Plecoptera
Pleco-: folded; -ptera: wing
(Refers to folding of a region of the hind wing when at rest)
Stoneflies
Order Plecoptera
• Incomplete metamorphosis:
- Hemimetabolous
• Pterygote
• Neoptera
Order Plecoptera
• Compound eyes SMALL TO MEDIUM
• Antennae LONG and FILIFORM
• Two pairs of membranous wings,
forewings long and narrow
• Two long cerci
Importance
• Ecological indicators of good water quality
• Important source of food for fish and other
aquatic wildlife