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Terms in this set (26)
What does the Merostomata subphylum contain?
Horseshoe crabs are more closely related to what class, rather than crabs?
Arachnids, such as the spider and scorpion
How do horseshoe crabs breath?
They have five sets of book lungs that act as gills in the water but allow them to breath on land for as long as the lungs are moist.
How do horseshoe crabs see?
They have two pairs of eyes, a light-sensitive pair and a compound pair.
What does the Pycnogonida class contain?
How do sea spiders differ from land spiders?
While land spiders can only have four pairs of legs, sea spiders can have from four to six.
Approximately how many species of sea spiders exist?
Name four kinds of sea spider larvae.
Typical protonymph larva, the encysted larva, the atypical protonymph larva, and the attaching larva
What does the Arachnida class contain?
Spiders, scorpions, ticks, and mites
What are the two parts of an arachnid's body?
Thorax and abdomen
What is the purpose for each pair of an arachnid's legs?
The first pair are the pincers or poisonous fangs; the second pair are the pincers, feelers, or legs; the other pairs are mainly for walking.
What does the Crustacea subphylum contain?
Crustaceans (shocker, I know)
What is the scientific study of Crustaceans called?
Carcinology, or malacostracology, crustaceology, and crustalogy
Crustaceans have three main body segments. What are they called?
The head, the thorax, and the abdomen (or pleon); head and thorax together are called the cephalothorax.
What kind of organisms does the class Malacostraca contain?
Lobsters, krill, crabs, shrimp
What does the class insecta contain?
How many species of insects are there?
There are about 925,000 identified species, with the total estimated number somewhere between two and thirty million.
What does class Chilopoda contain?
What does "centipede" mean?
Their name is derived from the Latin word, "centum," meaning "hundred," and "ped" which means "foot."
Do all centipedes have one hundred feet, as their Latin name implies?
No, most actually have about fifty, but some have been known to have two hundred.
What does the class Diplopoda contain?
What does "millipede" mean?
The name is derived from the Latin, "mille," meaning thousand, and "ped," meaning foot.
How many legs do millipedes usually have?
What does the subphylum Trilobitomorpha contain?
What is one fact that distinguishes Trilobitomorpha from its fellow subphyla?
No trilobites are alive today. They're all extinct.
What are the three parts of a trilobite's body?
A cephalon (head), a thorax (body), and a pygidium (tail)
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