1) Bug Quiz AnswersA. Tropical harvestman (Pachyloidellus goliath) Order: Opiliones

B. Myrmecium malleum Order: AraneaeC. Solifuge Order: SolifugaeD. Velvet mite (Trombidium holosericeum) suborder: Acari

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Aphantochilus rogersi

What is an arachnid?

Arachnids are a class of arthropods! They are not insects. Insects are a different class of arthropods.

All arachnids have the following characteristics:• 4 pairs of legs (8 legs total)• Chelicerae and pedipalps • No wings or antennae

• Some groups have modified 1st pairs of legs that ACT like antennae.

Photos: Joanie

Order: Amblypygi (tailless whip scorpion)Order: Araneae (spider)

Jumping spider (family Salticidae)

Prosoma

Opisthosoma

Photo: Nancy

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Aphantochilus rogersi

• Two segments.• prosoma/cephalothorax • opisthosoma/abdomen

• There are some orders in• which the segments are fused (e.g. Acari) • or are broadly connected (e.g. Opiliones)

What is an arachnid continued

Order: ThelyphonidaVinegaroon

Mite: Fused segments Daddy Long Legs: Broadly Connected Segments

Michael Palmer CC BY SA 4.0Alan Walker CC BY SA 3.0

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References:

Brusca, R. C., & Brusca, G. J. (2003). Invertebrates 2nd edition. Sunderland, MA.

Ruppert, E.; Fox, R. & Barnes, R. (2007). Invertebrate Zoology: A Functional Evolutionary Approach (7th ed.). Thomson Learning. ISBN 0-03-025982-7