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Insecta    
昆虫纲

昆虫纲

Insecta
n 1: insects; about five-sixths of all known animal species
[synonym: {Insecta}, {class Insecta}, {Hexapoda}, {class
Hexapoda}]

Insecta \In*sec"ta\, n. pl. [NL. See {Insect}.]
1. (Zool.) One of the classes of Arthropoda, including those
that have one pair of antenn[ae], three pairs of mouth
organs, and breathe air by means of trache[ae], opening by
spiracles along the sides of the body. In this sense it
includes the Hexapoda, or six-legged insects and the
Myriapoda, with numerous legs. See {Insect}, n.
[1913 Webster]

2. (Zool.) In a more restricted sense, the Hexapoda alone.
See {Hexapoda}.
[1913 Webster]

3. (Zool.) In the most general sense, the Hexapoda,
Myriapoda, and Arachnoidea, combined.
[1913 Webster]

Note: The typical Insecta, or hexapod insects, are divided
into several orders, viz.: {Hymenoptera}, as the bees
and ants; {Diptera}, as the common flies, gnats, and
mosquitos; {Aphaniptera}, or fleas; {Lepidoptera}, or
moths and butterflies; {Neuroptera}, as the ant-lions
and hellgamite; {Coleoptera}, or beetles; {Hemiptera},
as bugs, lice, aphids; {Orthoptera}, as grasshoppers
and cockroaches; {Pseudoneuroptera}, as the dragon
flies and termites; {Euplexoptera}, or earwigs;
{Thysanura}, as the springtails, podura, and lepisma.
See these words in the Vocabulary.
[1913 Webster]


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  • Insect - Wikipedia
    Insects live in a world of motion This leaf-footed bug climbs windblown grass and flies off Insects (from Latin insectum) are hexapod invertebrates of the class Insecta They are the largest group within the arthropod phylum Insects have a chitinous exoskeleton, a three-part body (head, thorax and abdomen), three pairs of jointed legs, compound eyes, and a pair of antennae Insects are the
  • Insect | Definition, Characteristics, Types, Beneficial, Pest . . .
    Insect, any member of the class Insecta, the largest class of phylum Arthropoda Insects have segmented bodies, jointed legs, and exoskeletons They are distinguished from other arthropods by their body, which has three major regions: the head, the three-segmented thorax, and the many-segmented abdomen
  • List of insects | Orders, Butterflies, Beetles, Flies, Ants, Bees . . .
    Insects (class Insecta) have segmented bodies, jointed legs, and external skeletons Their bodies are divided into three major regions: head, thorax, and abdomen The following is an alphabetical list of insects grouped by order
  • List of insect orders - Wikipedia
    Insecta is a class of invertebrates that consists of around 30 individual extant orders [1] Orders are the fifth taxonomic rank used to classify living organisms, below the rank of class, but above the rank of family [2] With around 1 million insect species having been formally described and assigned a binomial name, insects are the most diverse group of animals, comprising approximately
  • Insecta (insects) | INFORMATION | Animal Diversity Web
    With around one million named species and perhaps several times that number unnamed, insects account for a great majority of the species of animals on earth They are a tremendously successful group Insects can be found in almost all terrestrial and freshwater habitats, from the driest deserts to freshwater ponds, from the canopy of a tropical rainforest (where their diversity is unbelievably
  • Insect - Definition, Types, List, Life Cycle, Anatomy, Pictures
    What is an insect with examples, classification, characteristics, body parts Do they have brains, hearts, lungs, or blood What do they eat How do they breathe
  • Insects (Class Insecta) · iNaturalist
    Insects or Insecta (from Latin insectum, a calque of Greek ἔντομον , "cut into sections") are by far the largest group of hexapod invertebrates within the arthropod phylum Definitions and circumscriptions vary; in one approach insects comprise a class within the Phylum Arthropoda As the term is used here, it is synonymous with Ectognatha
  • Insects: Types, Characteristics, Classification, and Fascinating Facts
    What are insects? What are the main types? What are the characteristics of insects? Learn their definition, types of insects, characteristics, habitats, behaviors, facts with images
  • Class Insecta - Insects - BugGuide. Net
    Class Insecta - Insects Classification · Synonyms and other taxonomic changes · Explanation of Names · Numbers · Identification · Range · Habitat · Life Cycle · Remarks · Print References · Internet References · Works Cited
  • Insecta - an overview | ScienceDirect Topics
    Insecta is defined as the most species-rich class of organisms, comprising approximately 1 million described species, characterized by three major body divisions—head, thorax, and abdomen—and a single pair of locomotory appendages on each thoracic segment This class is found in diverse ecosystems worldwide, particularly abundant in tropical forests AI generated definition based on





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