For 'bugs', we're concerned with the animal kingdom, of course; more specifically with the phylum Arthropoda. All animals in the arthropod phylum have exoskeletons. Then the fun begins. 'Insects' (Insecta) are a class. (All insects are arthropods, but not all arthropods are insects.) Not all critters we call 'bugs' are insects, though. Another class is Arachnida (spiders). And still another is Myriopoda (for multilegged creepy crawlies like millipedes).
In this 'bug' series so far, we've looked only at insects. And we've distinguished between 'true bugs' and not-true-bugs. True bugs are one of 29 insect orders, specifically, the order Hemiptera. Not-true-bugs are the other 28 orders. That's enough of that. Let's review with some new insects! (All photos from Ned Harris, of the order greatus photographerus.)
|2 insects on a specimen from the plant kingdom|
The insects on the right is a katydid. Order: Orthoptera. Same bottom line.
|Look at those horns!|
|Giant mesquite BUGS ( nymphs, actually)|
What can we say about all these critters above? They are animals, arthropods, and insects. That's kingdom, phylum, and class. That wasn't so bad now, was it?