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A crustacean is an arthropod that has two or three body sections, five or more pairs of legs, and two pairs of antennae. Arachnids are arthropods with two body sections, four pairs of legs, and no antennae. Arachnids are arthropods with two body sections, four pairs of legs, and no antennae.
What else can I help you with?
How do ticks differ from arachnids?
They are the same thing, but arachnids are a larger group.
How does the body plan of centipedes and millipedes differ from that of insects?
Insects' bodies are divided into three - head, thorax and abdomen and they have 6 legs. Millipedes have a differentiated head but their bodies comprise many identical segments eac with a pair of legs.
How do the three largest groups of arthropods differ?
The three largest are insects (six legs, almost all have wings), arachnids (eight legs, piercing fangs, front legs modified to pedipalps), and crustaceans (ten legs, mostly aquatic save for woodlice). ^^
What are the characteristics of an anthrpod?
Arthropods form the Phylum Arthropoda. Their characteristics include: Segmentation, in the sense of having heads, thoraxes and abdomens or cephalothoraxes and abdomens. Those that are mentioned are just the 'main' segments. Jointed legs. An exoskeleton. This is a hard covering, nonpermittive of growth as it is on the outside. Thus it must be shed periodically by ecdysis. Thus arthropods are part of the Ecdysozoa. Arthropods include millipedes and centipedes (Diplopoda and Chilopoda), insects (Insecta), arachnids (Arachnida) and crustaceans (Crustacea) and sea spiders (Pycnogonida). The mouthparts differ between the so called Chelicerata (includes arachnids and sea spiders) and the Mandibulata (includes insects and crustaceans and millipedes and centipedes). The mouthparts are, expectedly from the names, chelicerae and mandibles respectively. Note that not all six legged arthropods are insects. There are non-insect hexapods as well, such as springtails and silver fish and bristle tails. Crustaceans have 10 or more legs. Arachnids have 8. Millipedes have two pairs of legs per segment and centipedes have one pair of legs per segment. Phylogeny-wise it appears that insects (the only winged arthropods) are simply winged crustaceans i.e. insects are the most derived of the crustacean-insect clade.
How do you know something belongs to the crustaceans group of arthropods?
Crustaceans differ from other arthropods in that they have biramous (two-part) appendages and the nauplius larval form.
What makes crustaceans different from all other arthropods?
Arachnids differ from other arthropods in that they have no antenna (nor wings, like many insects). They also use book lungs to breathe, rather than the gills or spiracle/trachea configuration. They have a body plan of only two sections (tagmata) and eight legs, although often with a modified forward pair different from most other arthropods.
Which characteristic would be important in classifying an animal as either an insect or an arachnid?
an important characteristic would be that arachnids only have 8 or more legs also they dont have wings. some arachnids are crad, spider ex.
How do the largest groups of arthropods differ?
Under the arthropoda phylum are subphyla Chelicerata, Myriapoda, Crustacea, and Hexapoda. There is also an extinct class Marrellomorpha and an the extinct Trilobite ("three lobes") subphylum. The chelicerata, like spiders, scorpions, mites, etc., get their name from having appendages appear before the mouth, unlike most other arthropods they have only two body sections, and neither wings nor antennae; myriapods like centipedes and millipedes characterized by a high count of body segments and legs; crustaceans like crabs, shrimp, woodlice the only ones with biramous (two-part) limbs, and a nauplius larval form; hexapoda (with the class Insecta, the insects) named for their consolidated thorax with only three pairs of legs.
Is a garden spider a inesct?
No, they are part of the Arachnid family. Many people think of spiders as insects, but actually they are classified in a separate category. Spiders are part of a group called arachnids, which also includes mites, ticks, and scorpions. Arachnids share many features with their arthropod cousins, but they differ in that they do not have antennae. Also, spiders have eight legs (insects have six), and their bodies are segmented into two parts (insects' bodies have three parts).
Are killer whales arthropods?
No, orca (killer whales) are cetaceans, or marine mammals; since they possess a backbone they are classified in phylum Chordata. Arthropods (phylum Arthropoda) differ in that they have chitinous exoskeletons (think of crabs, lobsters, millipedes, insects), have segmented bodies, and no backbone.
How is the skeleton of an arthropod diffrent from your skeleton?
Arthropod skeletons differ from ours in that they are external, or exoskeletons. By contrast ours are internal, or endoskeletons.
What distinguishes crustaceans from all other anthropods?
Crustaceans are distinguished from other arthropods in that their appendages are biramous (branch into two parts), and that they have a larval form which has a single eye and antennae used for swimming (nauplius). One might also assume they differ from most other arthropods in that they are aquatic, but there are both aquatic non-crustaceam arthropods (like the horseshoe crab and the sea spider), and non-aquatic crustaceans (like the terrestrial woodlouse). Note that the term "anthropod" should not be confused with arthropod - the former is a broad term and not a taxon, meaning human or human-like.
