Upload
jared-mcdowell
View
233
Download
6
Tags:
Embed Size (px)
Citation preview
What is Entomology?
The study of insects (and their near relatives).
What are insects (and near relatives)?
Insects and their relatives areARTHROPODS.
Review of Zoological Nomenclature(classifying & naming)
Taxonomic Categories
PhylumClass
OrderFamily
GenusGenus & species
Review of Zoological Nomenclature
Taxonomic Categories
Kingdom - AnimalaePhylum - Arthropoda
Class - InsectaOrder - Coleoptera
Family - ScarabaeidaeGenus - Popillia
Genus & speciesPopillia japonica Newman
Characteristics of the PhylumArthropoda
The segmented bodies are arranged into regions, called tagmata (e.g., head, thorax, abdomen).
The paired appendages (e.g., legs, antennae) are jointed.
They posses a chitinous exoskeletion that must be shed during growth.
They have bilateral symmetry.
The nervous system is dorsal (belly) and the circulatory system is open and ventral (back).
What are some other Animal Phyla?
Porifera & Cnidaria – sponges & corals.
Platyhelminthes - flatworms, tapeworms
Nematoda - roundworms
Mollusca - clams, snails & slugs, squids
Echinodermata - starfish, sea urchins
Annelida - segmented worms (earthworms)
Chordata - fish, amphibians, reptiles, birds, mammals
Arthropod Groups (taxa)
The arthropods are divided into two large groups that exist today:
Chelicerates
and
Mandibulates
Chelicerate Arthropod Characters:
Pincher-like mouthparts - chelicerae - and pedipalps
NO antennae
Two body regions, usually - cephalothorax & abdomen
Four pairs of legs
Horseshoe crabs and arachnids are only living groups
Mandibulate Arthropod Characters:
Mouthparts are mandibles - normally chewing sideways
One or two pairs of antennae
Various body region arrangements - cephalothorax & abdomen / head & trunk / head, thorax & abdomen
Variable leg numbers
Insects, crustaceans & myriapods
Classes of Myriapods(many legged arthropods)
(all have one pair of antennae, a head region, and trunk with many pairs of legs, use trachea)
Diplopoda - millipedes
Chilopoda - centipedes
Myriapods
Millipede (Diplopoda)
Two pair of legs per visible segment, attached under body.
Centipede (Chilopoda)
Pair of fangs under head, one pair legs per visible segment - attached to side of body.
No fangs, no eyes, legs attached to side of body.
[one pair of antennae, head & trunk regions, trunk with many pairs of legs]
Classes of Crustacea• mostly marine, fresh water, a few terrestrial• all have two pair of antennae• five or more pairs of legs• segmented abdominal appendages• head & trunk or cephalothorax & abdomen body arrangement• have gills
Sowbugs or pillbugs
Sand fleas
Barnacles
Crabs, lobster, shrimp