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Notonectidae is a cosmopolitan family of aquatic insects in the order Hemiptera, commonly called backswimmers because they swim "upside down" (inverted). They are all predators and typically range from 0.5 to 1.5 cm (0.2–0.6 in) in length. [1]
Arthropods (Greek for jointed feet) have an exoskeleton (external skeleton), a segmented body, and jointed appendages (paired appendages). They form a phylum which includes insects, arachnids, myriapods, and crustaceans. Arthropods are characterized by their jointed limbs and cuticle made of chitin, often mineralised with calcium carbonate.
The mandibulates are divided between the extant groups Myriapoda (millipedes & centipedes, among others) and Pancrustacea (including insects and crustaceans, among others). Molecular phylogenetic studies suggest that the living arthropods are related as shown in the cladogram below.
An instar (/ ˈ ɪ n s t ɑːr / ⓘ, from the Latin īnstar 'form, likeness') is a developmental stage of arthropods, such as insects, which occurs between each moult (ecdysis) until sexual maturity is reached. [1] Arthropods must shed the exoskeleton in order to grow or assume a new form. Differences between instars can often be seen in ...
These minute arthropods are apterous, unlike some orders of insects that have lost their wings secondarily (but are derived from winged ancestors). Their mouthparts are enclosed within a pouch in the head capsule, called the gnathal pouch, so only the tips of the mandibles and maxillae are exposed beyond the cavity. [1]
More commonly found between November and April, the spider builds a nest of tightly-woven silk and will hunt flies and spiders, some of which are larger than itself. It is a small spider, with a carapace that ranges in length between 2.1 and 2.4 mm (0.08 and 0.09 in) and an abdomen that is between 1.7 and 3.2 mm (0.07 and 0.13 in) long. The ...
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Entomology (from Ancient Greek ἔντομον (entomon) 'insect' and -λογία () 'study') [1] is the scientific study of insects, a branch of zoology.In the past the term insect was less specific, and historically the definition of entomology would also include the study of animals in other arthropod groups, such as arachnids, myriapods, and crustaceans.
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