Arthropods 3

What are Anomura

Infraorder of Decapods

Hermit crabs, sand crabs, squat lobsters, and porcelain crabs

What are Caridaen

Infraorder of Decapods

True shrimp

What are Dendobranchiata

Suborder of Decapods

Prawn shrimp

What are Astacidea

Infraorder of Decapods

True lobsters

What are Achelata

Infraorder of Decapods

Spiny and Slipper lobsters

What are Brachyura

Infraorder of Decapods

True crabs

What are Penaeids

Family of Dendrobranchia

Edible shrimp

How do Penaeids breed

Broadcast spawning

How many chelipeds do Penaeids have

6

What are chelipeds

Walking legs with claws

What are Carideans

Infraorder of Decapod

Cleaner, grass, and pistol shrimps

How many pereopods do Carideans have

10

Who has more complex eyes, Carideans or Penaeids?

Penaeids

How many chelipeds do Carideans have

4

What are chelae

The claws on the chelipeds

How many maxillipeds do Carideans have

6

What are Petasma in carideans

External sex organ for transfering sperm. Females have a thelycum to receive sperm.

What is the Pleura in carideans

The flap/sheild that covers each abdomen. They have 6

What is the rostrum on carideans

Structural nose for defense and locomotion

What are Astacidea

Infraorder of decopoda

True Lobsters

What are Achelata

Infraorder of decapoda

Spiny and Slipper Lobsters

Where and how do Astacidea live?

Colder water, solitary

Where and how to Achelata live?

Warmer waters, in aggregations

What are the Chela in astacidea

Claws

What is the crusher celiped on astacidea

The bigger claw for crushing

What is the cutter/pincer celiped in astacidea

The smaller faster sharper claw for tearing

What distinguishes Achelata from other lobsters?

No chelipeds

Two large flat plates that are modified antennae for sensing and digging

Which lobsters migrate

Spiny lobsters, Acelata

What is the Carapace on brachyura

Protective shell

What are the Teeth in brachyura

The protective spines on the carapace

What are Pereopods on brachyura

Walking legs

What are the Chelipeds on brachyura

First set of pereopods

What is the Chela in brachyura

Claw on the cheliped

What are the Maxillipeds on brachyura

Modified mouth parts that pass food from the chela to the mouth

What is the Dactyl in brachyura

Movable appendage on the chela that allows swimming in swimming crabs

How do Brachyura reproduce

Internal fertilization with brooding

How do Penaeids reproduce?

External fertilization, NO brooding

How do Carideans, Acheleta, Astecidea, and Anomurans reproduce

Pseudo external fertilization with brooding

What are Zoea

Larval stage of brachyuran, anomuran, and caridean

Long, with rostrum or dorsal spine

What is a Megalopa

Larval stage of brachyuran, anomuran, and caridean

Wide, resembles the adult form kinda

What is this

Zoea

What is this

Anomuran zoea

How long do Zoea stay in the plankton?

A few weeks to a month

What do Zoea eat

Phytoplankton

How long do Megalopea stay in the plankton?

A few days to two weeks

What do Megalopea eat?

Other crustacean zooplankton

What are the three Penaeid larval stages

Nauplii

Protozoea

Mysis

What are the two Achaleta larval stages

Phyllosoma and Puerulus

How long can Phyllosoma stay in the plankton

Up to 2 years