Pentatomidae facts for kids
Quick facts for kids Pentatomidae |
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| Nezara viridula | |
Scientific classification  |
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| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hemiptera |
| Suborder: | Heteroptera |
| Infraorder: | Pentatomomorpha |
| Superfamily: | Pentatomoidea |
| Family: | Pentatomidae Leach, 1815 |
| Subfamilies | |
Pentatomidae is a very large family of insects that belong to the order Hemiptera. People often call them stink bugs or shield bugs. They are the largest group inside the superfamily Pentatomoidea, including over 4,700 different species. Scientists named them using the Greek words pente, meaning five, and tomos, meaning section. This name describes their special antennae, which are divided into five parts. Most of these bugs use their piercing sucking mouthparts to sip juices from green stems and leaves. Because they eat plants, many are classified as plant eaters. However, some kinds hunt other insects and can help farmers by eating garden pests.
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Why Are They Called Shield Bugs and Stink Bugs?
People use different names for these creatures depending on where they live. In British English, they are often called shield bugs. Their wide bodies look just like a medieval heraldic shield when viewed from above. Related insect groups, like Acanthosomatidae, Scutelleridae, and Cydnidae, also share this neat shield design.
In American English, these insects are almost always known as stink bugs. They earned this funny name because they produce a smelly defensive spray when they feel scared or get poked. This liquid comes out of tiny glands on their bodies and helps scare away hungry birds and lizards. The smell contains chemicals like aldehydes and alkanes. People describe the scent in different ways, comparing it to crushed coriander, dusty wood, or bitter spices. Some unrelated insects, such as beetles in the genus Eleodes, also make bad smells and get called stink bugs too.
What Stink Bugs Look Like and Anatomy
Adult shield bugs have an easy body plan to recognize once you know what to look for. Their bodies are split into three main parts: the head, the thorax, and the abdomen. On their heads, they have large compound eyes, a protective plate called the clypeus, and antennae with five segments. Each foot has three tiny joints called tarsal segments that end in sharp little claws. Strong legs feature an upper femur and a lower tibia that help them climb easily over rough bark.
Right behind the bug's neck sits a broad shield plate called the pronotum. In the center of the back rests a large triangular plate called the scutellum. Shield bugs have two sets of wings. The front wings, known as hemelytra, are tough and leathery near the base but become thin and clear near the tips. This tough region includes parts called the corium and embolium, while the soft end is the hemelytral membrane. When resting, the wings fold flat across the back with the clear tips crossing over each other. Immature bugs, called nymphs, do not have full wings yet, though older nymphs grow tiny wing buds.
Stink Bugs and Human Agriculture
Many stink bugs cause big trouble in farming. When huge groups feed on valuable crops, they can turn into a serious agricultural pest. They poke holes into cotton, corn, soybeans, and fruit trees to drink sap, leaving damaged fruit behind. Farmers try to protect their fields using chemical pesticides, but some bugs develop insecticide resistance.
One famous traveler is the brown marmorated stink bug. It arrived in the United States during the 1990s in Pennsylvania and rapidly spread to dozens of other states. The insect attacks orchards and creeps into warm houses during cold autumn days. Island nations work very hard to keep it out; for example, the MPI in New Zealand monitors cargo ports closely to stop stowaways.
Helpful Bugs and Natural Control
Not all stink bugs are troublemakers. Some species belonging to the subfamily Asopinae are fierce hunters that eat caterpillars and beetle grubs. Because they eat harmful pests, these predators are very beneficial to gardeners.
Scientists are discovering smart new ways to handle pest bugs without spraying harsh chemicals. Instead of sprays, farmers can set traps that use scented pheromones to attract the bugs away from fields. Researchers also explore special vibrations that interrupt how the bugs talk to each other through plant stems, as well as harmless microbes in helpful symbiosis with the insects.
Shield Bugs as Food
In parts of Mexico, shield bugs are treated as a traditional snack rather than pests. People collect special species like Edessa mexicana, which are known locally as Jumiles. In places like Morelos and Guerrero, cooks roast them to make spicy salsa or use them as a tasty filling inside a warm taco. Those who eat them say they have a surprising flavor that tastes a bit like cinnamon or mint.
Classification and Major Groups
Scientists divide the family Pentatomidae into several smaller branches called subfamilies:
- Asopinae – predatory shield bugs found worldwide that hunt other insects
- Discocephalinae – flat-bodied bugs found mainly across North and South America
- Pentatominae – the largest branch, containing common plant-eating stink bugs worldwide
- Phyllocephalinae – unusual shield bugs with distinct leaf-shaped head shapes
- Podopinae – often called turtle bugs because of their tough, rounded bodies
Images for kids
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Eurydema oleracea resting on a plant
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Euthyrhynchus floridanus nymph showing bright warning colors
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Troilus luridus perched on a green leaf
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Raphigaster nebulosa walking on wood
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Eurydema ornatum displaying spotted patterns
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Perillus nymph searching for prey
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Atelocera serrata camouflaged on tree bark
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See also
In Spanish: Pentatómidos para niños
- Green stink bug
- Brown marmorated stink bug
- Rice stink bug
