Zen Practical 2- Phylum Anthropoda

What is the main phylum discussed in this practical

Arthropoda

Characteristics of Anthropodas as invertebrate animals

• exoskeleton

• Moult ( ecdysis)- shed their skin

• Undergo metamorphosis

• Have jointed legs

List the subphyla

Trilobitorpha, Chelicerata, Crustacea and Myriapoda

What are important morphological characteristics that classify arthropodas into subphylum’s

Number of antennae; uniramous or biramous appendages

Biramous appendages

The appendages/legs spilt into two lobes at the end or the limb branches into two

What subphylum does this organism belong to

Subphylum Trilobitomorpha

Characteristics of subphylum Trilobitomorpha

1 pair of antennae, biramous appendages, extinct, ocean

What subphylum does this organism belong to?

Subphylum Chelicerata

What are the characteristics of the subphylum Chelicerata

No antennae’s, uniramous appendages, 4 legs protruding from cephalothorax

In the subphylum Chelicerata what two regions is the body divided into

• Prosoma/ cephalothorax

• Opisthoma

In the subphylum Chelicerata, what are the mouthparts called

Chelicerae

In the subphylum Chelicerata what part of them has a sensory function that can also be used for feeding, locomotion and reproduction?

Pedipalps

What class and subclass does the giant water scorpions belong to ( subphylum Chelicerata )

Class Merostomata, Subclass Eurypterida ( largest arthropod to ever live )

What class and subclass does a horseshoe crab belong to ( subphylum Chelicerata )

Class Merostomata, Subclass Xiphosura ( exception in subphylum because of biramous appendages )

What class do sea spiders fall into and list one characteristic

Class Pycnogonida - reduced abdomen

What class is the biggest in the phylum Chelicerata

Class Arachnida - 8 legs, body divided into cephalothorax and abdomen

What order do spiders belong to

Order Araneae

What do pedipalps function as in the order araneae

Secondary genitalia act as sperm storage in males

What is the venom called of those spiders that are of medical importance

Neurotoxic venom

What is the black button spider’s species name?

Latrodectus indistinctus

What is the species name of a brown button spiders?

Latrodectus geometricus ( egg case spiny, red hourglass pattern on ventral side of abdomen )

What is the venom called in sac spiders and violin spiders

Cytotoxic venom ( medical importance )

What order are scorpions in?

Order Scorpiones

What are characteristics of the order scorpions

Pedipalps are modified into pinchers, telson ( tail) with a stinger

In the order scorpiones, what is the name of the two families

Family Buthidae, Family Scropionidae

Characteristics of Family Buthidae

Thick tail, small pincers, medically important because has neurotoxic venom

Characteristics of Family Scorpionidae

Thin tail, large pincers

What order do pseudoscorpions belong to ?

Order Pseudoscorpiones ( pedipalps modified into pinchers, no telson )

What order do sun spiders belong to ?

Order Solifugae (Pedipalps are leg-like, chelicerae are large and face forward)

What order do Tailless whip scorpions belong to?

Order Amblypygi ( pedipalps are claw-like)

What order do harvestmen belong to?

Order Opiliones ( v long legs, distinct oval compact body)

What subclass do ticks and mites belong to?

Subclass Acari ( compact body with short legs, cephalothorax broadly joined to abdomen )

What superorder do mange mites and follicle mites belong to ?

Superorder Acariformes

What order do mange mites belong to

Order Sarcoptiformes ( medically & veterinary NB, burrow into skin)

What order does follicle mites belong to ?

Order Trombidiformes ( burrow into hair follicles, benefit humans, veterinary NB- cause nodules )

What superorder do ticks belong to?

Superorder Parasitiformes

What order do ticks that feed on blood from host animals belong to?

Order Ixodida

What family do soft ticks, mouthparts cannot be seen, belong to?

Family Argasidae

What family do hard ticks, mouthparts cannot be seen from above, belong to ?

Family Ixodidae

What subphylum does this organism belong to ?

Subphylum Crustacea

Characteristics of the subphylum Crustacea

2 pairs of antennae, biramous appendages

What class and order do fairy shrimps and brine shrimps belong to?

Class Branchiopoda, order Anostraca

What class and order do water fleas ( Daphnia ) belong to ?

Class Branchiopoda, order cladocera

What class do copepods and barnacles belong to?

Class Maxillopoda

What is the subclass of copepods

Subclass Copepoda

What subclass do acorn barnacles and goose-neck barnacles belong to?

Subclass Thecostraca

What class and order do wood lice ( 7 legs) belong to?

Class Malacostraca, order Isopoda

What class and order do amphipods ( laterally flattened ) belong to?

Class Malacostraca, order Amphiphoda

What order do crabs, crayfish, lobsters and shrimp belong to- all have 10 legs ?

Order Decapoda

What class do millipedes belong to?

Class Diplopoda

What subphylum do centipedes and millipedes belong to?

Subphylum Myriapoda

What characteristics do organisms in subphylum Myriapoda have?

1 pair of antennae’s, uniramous appendages

How do millipedes protect themselves?

• roll into a ball

• Defecate

• Emit hydrogen cyanide

What class do centipedes belong to ?

Class Chilopoda

What are the characteristics of subphylum Hexapoda?

1 pair of antennae, uniramous appendages, body clearly divided into a head, thorax and abdomen