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Arthropods.

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Presentation on theme: "Arthropods."— Presentation transcript:

1 Arthropods

2 Insects and their relatives are ARTHROPODS.
What is Entomology? The study of insects (and their near relatives). What are insects (and near relatives)? Insects and their relatives are ARTHROPODS.

3 Review of Zoological Nomenclature
(classifying & naming) Taxonomic Categories KINGDOM Phylum Class Order Family Genus Genus & species

4 Review of Zoological Nomenclature
Taxonomic Categories Kingdom - Animalae Phylum - Arthropoda Class - Insecta Order - Coleoptera Family - Scarabaeidae Genus - Popillia Genus & species Popillia japonica Newman

5 Characteristics of the Phylum
Arthropoda 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).

6 Arthropod Groups (taxa)
The arthropods are divided into two large groups that exist today: Chelicerates and Mandibulates

7 Chelicerate Arthropod Characters:
Pincer-like mouthparts - chelicerae NO antennae Two body regions, usually - cephalothorax & abdomen Four pairs of legs Horseshoe crabs and arachnids are only living groups

8 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

9 Orders of Arachnids Scorpions Pseudoscorpions Daddy Long-Legs
Mites & Ticks Spiders

10 Pseudoscorpion Tick (a mite) Scorpion Wolf Spider Daddy-long-legs

11 Scorpion Anatomy

12

13 chelicerae eyes pedipalp

14 Pseudoscorpion

15 American dog tick male Blacklegged (deer) tick female

16 American dog tick female laying egg mass (1000-2000 eggs!).

17 Clover mites Twospotted spider mites Predatory mite

18 daddy long-legs cephalothorax abdomen

19 Spider Anatomy pedipalp chelicera (fang) cephalothorax narrow waist
abdomen

20 Jumping Spider Abdomen Cephalothorax Chelicera (fang) Pedipalp

21 Wolf spider with egg case
Spitting spider Orb-weaving spider Tarantula

22 Black widow with egg case
Brown recluse

23 (many legged arthropods)
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

24 Myriapods Millipede (Diplopoda)) Centipede (Chilopoda))
[one pair of antennae, head & trunk regions, trunk with many pairs of legs] 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.

25 Millipede (Diplopoda)
Centipede (Chilopoda) Garden centipede

26 Classes of Crustacea Sowbugs or pillbugs Crabs, lobster, shrimp
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 Crabs, lobster, shrimp


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