? Entognatha
Collembola (Isotoma sp.)
Scientific classification
Kingdom: Animalia Phylum: Arthropoda Subphylum: Hexapoda Class: Entognatha
Orders
Collembola Diplura Protura Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms (as opposed to folk taxonomy). ... Phyla Animals are a major group of organisms, classified as the kingdom Animalia or Meta­zoa. ... Subphyla and Classes Arthropods (phylum Arthropoda) (from Greek ἀρθρον, meaning joint and πούς/ποδός, meaning foot) are the largest phylum of animals and include the insects, arachnids, crustaceans, and others. ... Classes & Orders Class Insecta (insects) Unplaced orders:    Order Diplura    Order Collembola (springtails)    Order Protura The subphylum Hexapoda constitutes the largest (in terms of number of species) grouping of arthropods and includes the insects as well as a few much smaller groups of wingless arthropods closely related to insects: Collembola, Protura... Families Suborder Arthropleona   Superfamily Entomobryoidea    Entomobryidae - slender springtails    Isotomidae - smooth springtails    Oncopoduridae    Paronellidae    Tomoceridae   Superfamily Poduroidea    Brachystomellidae    Hypogastruridae - elongate-bodied springtails    Neanuridae    Odontellidae    Onychiuridae - blind springtails    Poduridae - water springtails Suborder Symphypleona    Dicyrtomidae    Katiannidae    Sminthuridae - globular springtails    Sminthurididae    Bourletiellidae    Arrhopalitidae Springtails (Order Collembola) form the largest of the three orders of... This article is about the hexapod order, for the plant genus see Diplura (Algae). ... Families Acerentomidae Eosentomidae Protentomidae Proturans (Order Protura) are one of the three hexapod groups that are no longer considered insects (along with Collembola and Diplura). ...

The Entognatha are a class of ametabolous arthropods, which, together with insects, make up the hexapods. They are are wingless and so aren't considered to be insects, although they are related to them. The three orders that belong to this group are the Collembola (springtails), Diplura and Protura. It is agreed that the hexapodous condition of these animals has evolved independently from that of insects. Furthermore, this condition has evolved independently within each group. These three orders are not closely related however, and the Entognatha are therefore considered to be a paraphyletic group. Scientific classification or biological classification refers to how biologists group and categorize extinct and living species of organisms. ... Subphyla and Classes Arthropods (phylum Arthropoda) (from Greek ἀρθρον, meaning joint and πούς/ποδός, meaning foot) are the largest phylum of animals and include the insects, arachnids, crustaceans, and others. ... Classes & Orders See taxonomy Insects are invertebrate animals of the Class Insecta, the largest and (on land) most widely-distributed taxon within the phylum Arthropoda. ... For six-legged insects, see Hexapoda A Hexapod is a platform for machinery that can be spatially displaced with six degrees of freedom under computer control by individually shortening or lengthening six (=greek hex) struts. ... Scientific classification or biological classification refers to how biologists group and categorize extinct and living species of organisms. ... Families Suborder Arthropleona   Superfamily Entomobryoidea    Entomobryidae - slender springtails    Isotomidae - smooth springtails    Oncopoduridae    Paronellidae    Tomoceridae   Superfamily Poduroidea    Brachystomellidae    Hypogastruridae - elongate-bodied springtails    Neanuridae    Odontellidae    Onychiuridae - blind springtails    Poduridae - water springtails Suborder Symphypleona    Dicyrtomidae    Katiannidae    Sminthuridae - globular springtails    Sminthurididae    Bourletiellidae    Arrhopalitidae Springtails (Order Collembola) form the largest of the three orders of... This article is about the hexapod order, for the plant genus see Diplura (Algae). ... Families Acerentomidae Eosentomidae Protentomidae Proturans (Order Protura) are one of the three hexapod groups that are no longer considered insects (along with Collembola and Diplura). ... Paraphyletic - Wikipedia /**/ @import /skins-1. ...

These three groups, if united with the order Thysanura, form the class Apterygota. Families Lepidotrichidae Lepismatidae Maindroniidae Nicoletiidae Thysanura is an order of small active insects that includes the familiar silverfish Lepisma saccharina and the firebrat. ... Orders Archaeognatha Thysanura Apterygota is a subclass of insects that are small agile insects, distinguised from other insects by their lack of wings now and in their evolutionary history. ...

Morphology

These minute arthropods are primitively wingless, unlike some other orders of insects that have lost their wings secondarily (but are derived from winged ancestors). Their name comes from their mouthparts that are withdrawn into the head. Other differences with insects are that each antennal segment is musculated; in insects, only the two basal segments are. Of the three orders, only collembolans possess eyes. Nevertheless, many collembolans are blind, and even when compound eyes are present, there are no more than eight ommatidia. Subphyla and Classes Subphylum Trilobitomorpha Trilobita - Trilobites (extinct) Subphylum Chelicerata Arachnida - Spiders, Scorpions, etc. ... Insect wings are outgrowths of the insect exoskeleton, that enable insects to fly. ... Antennae (singular antenna), are the paired appendages connecting to the first (and in crustaceans also to the second) segment of the head of the members of all subphyla of the arthropods except Chelicerata. ... Compound eye of a dragonfly Compound eye of Antarctic krill as imaged by an electron microscope A compound eye is a visual organ found in certain arthropods such as insects and crustaceans. ... The compound eye of insects is composed of hundreds of unit eyes called ommatidia. ...