Chapter 20: Crustaceans

What is the Latin root of "crustaceans"?

shell

How many described species of crustaceans are there?

There are 67,000 described species

What environments do insects and crustaceans control?

Insects control the land, while crustaceans control the water.

How many pairs of antennae do crustaceans have?

two pairs of antennae.

How many pairs of mandibles do crustaceans have?

one pair of mandibles.

How many pairs of maxillae do crustaceans have?

two pairs of maxillae.

What type of appendages do crustaceans have?

have one pair of appendages on each segment, with legs on most segments.

What are the respiratory organs in crustaceans?

have gills as their respiratory organs.

How many segments do crustaceans have?

have a large number of segments

What is a cephalothorax in crustaceans?

is formed when some thoracic segments fuse with the head.

What is the carapace in crustaceans?

a hard covering; that protects

What is the body covering of crustaceans made of?

with a secreted cuticle made of chitin, protein, and calcium carbonate.

How are the joints of crustaceans different from other body parts?

The joints are soft and thin, allowing for movement.

sternum

Each segment not enclosed by carapace is covered by a dorsal plate called a tergum and a transverse bar

What do female crustaceans possess for sperm deposition?

possess gonopores for sperm deposition.