| Feature(s) | Family | Suborder |
|---|
| Elytra broad, flexible, with network of ridges; elytra usually broadest posteriorly | |
| Head bent down, concealed from above by roof-like pronotum; antennae with last 3 segments lengthened and usually asymmetrically expanded | |
| Body robust, head often concealed from above; relatively small (< 5 mm); hind femora enlarged | |
| Elytra short, exposing 3-6 abdominal segments; body widest posteriorly, head and thorax narrower | |
| Body robust, elongate-oval to round; head mostly concealed from above; antennae short, abrupt 3-segmented club; often with scales or small hairs forming patterns | |
| Antennae usually longer than half the body, often longer than body; eyes usually notched, with antennae arising from notch | |
| Elongate-oval to oval, usually black and shiny and often with reddish or yellowish markings; antennae with abrupt 3-4 segmented club | |
| Maxillary palps longer than antennae; metasternum often extended into sharp spine | |
| Body relatively soft, usually widest at rear; head nearly concealed from above; brightly colored | |
| Broadly oval to round, evenly convex; antennae short, with weak 3-6 segment club; elytra often with spotted patterns; tarsi 4-4-4 | |
| Head as wide as pronotum, with narrow neck; pronotum widest near front, without sharp margin; antennae threadlike to weakly clubbed | |
| Eyes notched by frontal ridge; antennae threadlike, beadlike to very weakly clubbed, usually arising from under ridge | |
| Hind angles of pronotum pointed backwards | |
| Body elongate-narrow, pronotum and head narrower than elytra; hard-bodied; often marked with colors, always bristly-hairy | |
| Mandibles often large; medium to large size; antennae with comblike comb of 3-4 segments, often elbowed | |
| Hind coxae greatly enlarged, covering 2 or more abdominal segments | |
| Elongate-cylindrical, usually flattened; metallic; elytra rarely striated; pronotum and elytra separated by narrow waist | |
| Relatively large; head with small forwards-pointing horn; elytra grooved | |
| Body strongly flattened, elongate; antennae usually beadlike, sometimes threadlike; elytra usually striate | |
| Antennae threadlike, inserted above base of mandible | |
| | Feature(s) | Family | Suborder |
|---|
| Elytra short, exposing 3-6 abdominal segments; antennae threadlike to clubbed | |
| Body usually elongate-cylindrical; antennae short, elbowed, with rounded club; tarsi short | |
| Snout usually well-developed, flat, or slender; antennae usually elbowed, with 3-segmented club | |
| Antennae threadlike, inserted laterally between eyes and mandibles | |
| Extremely tiny; flight wings featherlike, often visible beyond elytra | |
| Elytra broader posteriorly, loose or not entirely covering abdomen; antennae clubbed | |
| Body usually robust, often small; antennal club abrupt, ball-like, 3-segmented | |
| Eyes usually not notched; tarsi 5-5-5; incredibly variable and diverse in body form | |
| Antennae elbowed, with abrupt 3-segmented club; elytra short, flattened close to body | |
| Head concealed in turtle-neck-like pronotum; antennae moderately long, slender or weakly clubbed | |
| Antennae with last 3-4 segments in flattened club; usually stout-bodied | |
| Hing legs flattened and fringed with hair; long, threadlike antennae | |
| Head concealed from above by flattened pronotum; body soft, fairly elongate | |
| Head broad, wider than pronotum, appearing to be on a short neck; body soft, leathery, and elytra loose | |
| Antennae usually long, threadlike to saw-toothed; body soft, fairly elongate | |
| Body humpbacked, pointed posteriorly; hind legs enlarged | |
| Head bent down, concealed from above by roof-like pronotum; pronotum usually with rasp-like teeth on front; antennae with 3-4 segmented club | |
| Pronotum-to-elytra edge flat; body surface usually metallic | |
| Antennae short, clubbed; front legs long compared to others; eyes divided into two parts | |
| Head concealed in turtle-neck-like pronotum; antennae short, comb-like, often concealed | |
|
Periodic Table 
The Nine Planets 
Digits of Pi
