Ptinus tectus facts for kids
Quick facts for kids Ptinus tectus |
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| Scientific classification | |
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| Phylum: | |
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Bostrichiformia
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| Superfamily: |
Bostrichoidea
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| Family: |
Ptinidae
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| Genus: |
Ptinus
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| Species: |
P. tectus
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| Binomial name | |
| Ptinus tectus Boieldieu, 1856
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The Australian spider beetle, also known as Ptinus tectus, is a type of beetle. It belongs to the Ptinus group within the Ptinidae family. This beetle is found all over the world, which means it's a cosmopolitan species. It arrived in Europe and the UK from Australia around 1900.
This beetle can be a nuisance because it often lives in places where food is stored or in museums. The scientific name Ptinus tectus (given by Boieldieu in 1856) is the most common name for it. Sometimes, you might still see it called Ptinus ocellus.
Contents
All About the Australian Spider Beetle
What Does the Australian Spider Beetle Look Like?
The Australian spider beetle is quite small, usually measuring between 2.5 and 4 millimeters long. That's about the size of a small ant! It has a dark brown color.
Adult beetles have mouthparts designed for biting. They also have a strong middle body section called a thorax. Their antennae, which are like feelers, have 11 segments. These beetles look a bit like spiders because they have a sturdy body and a narrow "neck" area. They also have six long, thin legs, each with five small parts at the end.
The Life Cycle of the Australian Spider Beetle
The female Australian spider beetle lays her eggs in early summer. She can lay between 100 and 120 sticky eggs over about four to five weeks. She lays them either one by one or in small groups.
From Egg to Larva
If the temperature is between 20 and 25 degrees Celsius, the eggs will hatch in 3 to 16 days. The young beetles that come out are called larvae. These larvae are soft, curved, and covered with fine hairs. They don't move around much.
Larval Growth and Pupation
The larvae need at least six weeks to grow. During this time, they shed their skin, or "moult," about four or five times. Once they are fully grown, they start to look for a safe place to turn into an adult. They spin a silk cocoon, which is like a protective cell, and then they change into a pupa inside.
Adult Emergence and Lifespan
After 20 to 30 days, the adult beetle comes out of the cocoon. Adult Australian spider beetles can live for up to 12 months.
How Temperature Affects Development
The speed at which these beetles grow depends a lot on the temperature. For example, at 23-25 degrees Celsius and 70% humidity, it takes about 62 days for a beetle to go from an egg to an adult emerging from its cocoon. If it's cooler, around 15 degrees Celsius, it takes much longer, about 130 days.
The coldest temperature they can fully develop in is 10 degrees Celsius. The warmest is between 28 and 30 degrees Celsius. If it gets too hot, like 28 degrees Celsius, many eggs and larvae might not survive.
Why is the Australian Spider Beetle a Pest?
This beetle is known as a pest because it can cause problems in places like museums. It has been found in at least 55 museums and historic houses in the United Kingdom. They can damage stored items, including food products and valuable museum specimens.
