Phylum Arthropoda Overview

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Questions and Answers

Which order of insects is commonly known for its members that are characterized by two pairs of wings?

Ephemeroptera

Blattodea

Dermaptera

Odonata (correct)

What is the primary characteristic of the subclass Apterygota within the class Insecta?

Develops through complete metamorphosis

All members are winged

Includes only aquatic insects

Members are wingless (correct)

Which of the following insects belongs to the order Anoplura?

Head louse (correct)

German cockroach

Common fruit fly

Great green bush-cricket

Identify the insect that is classified under the order Hemiptera.

Firebug Signup and view all the answers

Which of the following insects is classified under the order Mantodea?

European mantis Signup and view all the answers

Which insect is classified as a member of the order Lepidoptera?

Swallowtail Signup and view all the answers

What characteristic distinguishes insects in the class Chilopoda?

Multiple body segments with one pair of legs per segment Signup and view all the answers

Which insect is known as the common house mosquito?

Culex pipiens Signup and view all the answers

Which of the following describes the structural organization of Trilobitomorpha?

It features homonomous segmentation and a cluster of segments. Signup and view all the answers

Which subphylum includes organisms with chelicers and pedipalps?

Chelicerata Signup and view all the answers

Which of the following statements is true about the reproductive strategy of most Crustacea?

They are gonochorists with both direct and indirect development. Signup and view all the answers

What is a defining characteristic of the Chelicerata subphylum?

Existence of a head and a thorax fused into a cephalothorax. Signup and view all the answers

What feature is typically found in Arachnida but not in Crustacea?

Poisonous glands. Signup and view all the answers

Which structure do Arthropods utilize for growth due to their exoskeleton?

Ecdysis. Signup and view all the answers

What accurately describes the legs of organisms in the subphylum Branchnomorpha?

They are composed of two segments. Signup and view all the answers

Which principle characteristic distinguishes the subphylum Tracheata?

The presence of tracheae for respiration. Signup and view all the answers

Study Notes

Phylum Arthropoda

Largest animal group
Heterogeneous segmentation
Reduced coelom, forms mixocoel (with haemolymph)
Body structure:
- 3 body parts: head, thorax, abdomen
- 2 body parts: cephalothorax, abdomen
Segmented legs (6 or more)
Cuticle
Regular ecdysis (molting)

Subphyla

Trilobitomorpha
- Extinct
- Homonomous segmentation
- 3 parts: head, thorax, cluster of segments
- Legs made of 2 segments
- Armor
Chelicerata
- Cephalothorax + abdomen
- 4 pairs of legs
- Exoskeleton
- Extracorporeal digestion
- Tracheae, pulmonary sacs
- Modified metanephridium or Malphigian tubule system
- Simple eyes
- Gonochoristic, sexual dimorphism, direct or indirect development
- Predacious or ectoparasitic
- Chelicers and pedipalps on cephalothorax
- Poisonous glands
- Spinnerets
Branchiata (Class Crustacea)
- Cephalothorax + abdomen
- Many legs
- Thick exoskeleton, armor
- Gills
- Antennal or maxillary glands
- 2 pairs of antennae
- Statocyst, compound eyes
- Gonochoristic, indirect or direct development, larval stages (nauplius, zoea)
- 2 pairs of mandibles + 2 pairs of maxillae
Tracheata
- Head + thorax + abdomen
- 3 pairs of legs
- Exoskeleton
- Metamorphosed mouth organs (piercing, sucking, licking)
- Tracheae
- Malphigian tubule system
- 1 pair of antennae
- Gonochoristic, direct or indirect incomplete/complete metamorphosis
- 1 pair of mandibles, 2 pairs of maxillae
- Can have wings

Classes within Tracheata

Diplopoda: Millipedes (e.g., Lithobius forficatus)
Chilopoda: Centipedes (e.g., Lithobius forficatus)
Insecta:
Apterygota: Wingless insects (e.g., Lepisma saccharina)
Pterygota: Winged insects
Ephemeroptera: Mayflies (e.g., Ephemera vulgata)
Odonata: Dragonflies (e.g., Libellula depressa, Aeschna grandis)
Dermaptera: Earwigs (e.g., Forficula auricularia)
Blattodea: Cockroaches (e.g., Blatella germanica, Blatta orientalis)
Ensifera: Bush-crickets and crickets (e.g. Tettigonia viridissima, Gryllus campestris)
Mantodea: Praying mantises (e.g., Mantis religiosa)
Orthoptera: Grasshoppers and locusts (e.g., Stenobothrus lineatus)
Hemiptera: True bugs (e.g., Cimex lectularius, Pyrrhocoris apertius)
Homoptera: Aphids, cicadas, and scale insects (e.g., Eriosoma lanigerum, Eulecanium corni)
Heteroptera: Water striders and other bugs (e.g. Gerris lacustris Hydrometra stagnorum)
Diptera: Flies and mosquitos (e.g., Culex pipiens, Anopheles maculipennis, Tabanus bovinus, Musca domestica, Drosophila melanogaster, Sacrophaga carnaria)
Hymenoptera: Bees, wasps, and ants (e.g., Formica rufa, Vespa vulgaris, Bombus terrestris, Apis mellifera)
Aphaniptera: Fleas (e.g., Pulex irritans)
Lepidoptera: Butterflies and moths (e.g., Vanessa atalanta, Acherontia atropos, Papilio machon, Bombyx mori, Laspeyresia pomonella, Pieris brassicae , Tineola bisselliella)
Coleoptera: Beetles (e.g., Dytiscus marginalis, Melolontha melolontha, Lucanus cervus, Necrophorus vespillo, Carabus cancellatus, Phausis splendidula, Leptura rubra, Oryctes nasicornis, Coccinella septempunctata, Colorado potato beetle, Ips typographus, Tenebrio molitor)

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Description

Test your knowledge on Phylum Arthropoda, the largest animal group characterized by its unique body structure and segmentation. This quiz covers various subphyla including Trilobitomorpha, Chelicerata, and Crustacea. Explore key features such as leg structures, exoskeletons, and reproduction methods.