Trapdoor Spider

This image was obtained from the Smithsonian Institution. The image or its contents may be protected by international copyright laws.
MORE IMAGES
MAKE FIELD
BOOK COVER

Make Field Book Cover

Image of Trapdoor Spider

Create your own field book and fill it with images and object from Q?rius! When you create a field book, you can put this image on its cover.

or Sign up
0
ADD COMMENTS

EXPLORE more

TAGS

COMMENTS

Add a comment

Be the first to leave a comment!

Goldenrod crab spider (Misumena vatia) eating bee
Courtesy of Loista Russpark, Gotland, Sverige, via Biopix, CC-By-NC

VIDEO LIBRARY

About Spiders, Scorpions, and Relatives (Class Arachnida): Feeding

Most arachnids are predators, feeding on insects and other animals without backbones (invertebrates). Special mouthparts are adapted to catch, eat, and digest prey. On each side of an arachnid's head is a pedipalp, a jointed appendage that commonly looks like a mini leg. A pedipalp helps an arachnid to feel prey (It is also used for sperm transfer during mating by spiders). Because most arachnid eyes seem to be low-resolution light and dark sensors, an arachnid relies more on its sense of touch to feed. A pair of chelicerae on the front of an arachnid's body serve as jaws. Packed with muscles, they move from side to side or up and down to impale and chew prey. Hollow fangs at the tips of spider chelicerae are used to inject the prey with digestive juices or venom. Some arachnids also make silk to catch and immobilize prey.

Tiny, freshwater amphipod (Gammarus roeseli)
Courtesy of Michal Manas, via BioLib.cz, CC-BY-SA

VIDEO LIBRARY

About Crustaceans (Subphylum Crustacea): Feeding

Crustaceans have a full toolkit for feeding. On the front of a crustacean’s head are two pairs of sensitive antennae for feeling food. Picture a lobster’s long antennae swinging up and down. Two appendages, often claws, are used to seize food and break it up into pieces. Crustaceans typically have three pairs of biting mouthparts for chewing. The configuration of their mouthparts varies, depending on whether they are predators, scavengers, or filter feeders. While crustaceans have many adaptations for eating, they are also a common prey for other organisms. Humans eat millions of tons of crabs, lobsters, and shrimp every year. Tiny crustaceans, including krill and copepods, are part of the plankton that tend to congregate in the top few hundred meters of the ocean and are are vital to the marine food web. As krill and copepods feed, they concentrate ocean nutrients into their bodies, which then become available to the fish and filter-feeding organisms that prey on them.