Arthropods Flashcards
“arthropods” came from the Greek words:
Arthros- and -poda
arthros- means?
Segmented
-poda means?
Foot
This phylum includes large classes with about nine lakh species. They may be aquatic, terrestrial or parasitic. They have jointed appendages and a chitinous exoskeleton. They have the ability to survive in every habitat. Invertebrates. Some are the mosts successful animals in the Earth’s history.
Arthropods
Arthropods first appeared around ______ million years ago.
500
Arthropods have a hard outer covering called ________ which is composed primarily of chitin, a tough polysaccharide. This provides protection and support for the body and serves as a surface for muscle attachment.
Exoskeleton
The bodies of arthropods are divided into _________ __________.
Distinct segments
The bodies of arthropods are typically organized into three regions:
Head
Thorax
Abdomen
Arthropods possess jointed _________ or _________ which are crucial for locomotion, feeding, sensing the environment, and reproduction.
Limbs or appendages
In many arthropods, certain segments of the body are fused together into functional units called?
Tagmata
The fusion of head and thorax
Cephalothorax
A process in which arthropods shed their exoskeleton to accommodate growth. It allows arthropods to increase in size and replace damaged or old exoskeleton.
Molting
Compound eyes of arthropods consist of multiple individual units called?
Ommatidia
Sensory appendages located on the head. Are used for detecting chemicals, touch, and sometimes even sound or vibrations.
Antennae
Large group of arthropods that comprises the arachnids, sea spiders, and horseshoe crabs. They lack antennae but possess a pair of chelicerae, a pair of pedipalps, and four pairs of legs. Have two body segments (tagmenta) and six pairs of appendages. 77,000 living species.
Chelicerata
Mostly found on land, body is differentiated into cephalothorax and abdomen, antennae are absent, abdomen is divided into 13 segments, has four pairs of interior appendages, respire through trachea or gills, and the Milpighian tubules help in excretion.
Chelicerata
Large group of mainly aquatic arthropods that include crabs, lobsters, shrimps, wood lice, barnacles, and many minute forms. 50,000 known species.
Crustacea
Major groups of Crustacea:
Branchiopods
Maxillopods
Ostracods
Malacostraca
They are aquatic, terrestrial, or parasitic, have cephalothorax, respiration occurs through gills or general body surface, body is covered by a single large carapace, possess two pair of antennae and five pairs of appendages, excrete through green or antennal glands, have pair of compound eyes and gonopores, development is direct, and larval stage is present.
Crustacea
Class of six-legged arthropods that comprises of insects.
“Insecta”
Largest group of arthropods. Head, thorax, and abdomen, constituting three tagma.
Hexapoda
Many legged, the species in this group have as few as nine and as many as 200 pairs of legs! Have long, worm-like bodies and range in size from microscopic to almost a foot in length. They have a head and a multi-segmented trunk, with multiple legs running down either side of their body.
Myriapoda
Distinct from phylum Annelida. Strange little elongated wormlike terrestrial invertebrates that live in damp, dark places in warm climates. Resemble slugs with legs.
Onychopora
Comprises the extinct marine arthropods known as Trilobites. From the Early Cambrian until the end of Permian epoch. Fossil record of 270 million years.
Trilobitomorpha
Beetle that belongs to the order Coleoptera. It is a significant pest of coconut palms and other palm species.
Coconut Rhinoceros Beetle “Uang”
“Titan beetle”
family Cerambycidae
natuve to the Philippines
Titan Longhorn Beetle “Bukbok”
Largest terrestrial arthropod and a species of hermit crab.
Birgus latro
Coconut crab “Ipis dagat”
