Classification and Biology of Arthropods January 28, 2009

Classification ❖ Country--USA ❖ State--Texas ❖ City--Bryan ❖ Street--Not Telling ❖ House # ❖ Surname--Brundage ❖ First Name--Adrienne ❖ Kingdom--Anamalia ❖ Phylum--Arthropoda ❖ Class--Insecta ❖ Order--Diptera ❖ Family--Muscidae ❖ Genus--Musca (fly) ❖ Species--domestica (house)

Arthropods ❖ Bilateral symmetry ❖ Exoskeleton with chitin ❖ Externally segmented bodies ❖ Appendages modified for feeding ❖ Ventral nerve cord and dorsal brain

Arthropods ❖ Bilateral symmetry ❖ Exoskeleton with chitin ❖ Externally segmented bodies ❖ Appendages modified for feeding ❖ Ventral nerve cord and dorsal brain

No, you don’ t have to memorize the chemical structure N-Acetylglucosamine

Arthropods ❖ Bilateral symmetry ❖ Exoskeleton with chitin ❖ Externally segmented bodies ❖ Appendages modified for feeding ❖ Ventral nerve cord and dorsal brain

Arthropods ❖ Bilateral symmetry ❖ Exoskeleton with chitin ❖ Externally segmented bodies ❖ Appendages modified for feeding ❖ Ventral nerve cord and dorsal brain

Chewing Piercing/Sucking Siphoning Rasping Sponging

Arthropods ❖ Bilateral symmetry ❖ Exoskeleton with chitin ❖ Externally segmented bodies ❖ Appendages modified for feeding ❖ Ventral nerve cord and dorsal brain

Dorsal Ventral Medial Lateral

Dorsal Brain Ventral Nerve Cord

Classes of Arthropods Arachnids ChilopodsDiplopods Insects Crustaceans

Class: Arachnida ❖ Spiders, mites, ticks, scorpions ❖ Characteristics ❖ Chelicerae and Pedipalpi ❖ No antennae ❖ 4 pairs of legs ❖ Cephalothorax and abdomen

Modified appendages, usually predatory organs

Class: Arachnida ❖ Spiders, mites, ticks, scorpions ❖ Characteristics ❖ Chelicerae and Pedipalpi ❖ No antennae ❖ 4 pairs of legs ❖ Cephalothorax and abdomen

Class: Arachnida ❖ Spiders, mites ticks, scorpions ❖ Characteristics ❖ Chelicerae and Pedipalpi ❖ No antennae ❖ 4 pairs of legs ❖ Cephalothorax and abdomen

Class: Arachnida ❖ Spiders, mites ticks, scorpions ❖ Characteristics ❖ Chelicerae and Pedipalpi ❖ No antennae ❖ 4 pairs of legs ❖ 2 body regions: Cephalothorax and abdomen

Cephalothorax: Fusion of head and trunk

Any Questions?