Information about Sternum (arthropod)
The sternum (pl. "sterna") is the ventral portion of a segment of an arthropod thorax or abdomen.
In insects, the sterna are usually single, large sclerites, and external. However, they can sometimes be divided in two or more, in which case the subunits are called sternites, and may also be modified on the terminal abdominal segments so as to form part of the functional genitalia, in which case they are frequently reduced in size and development, and may become internalized and/or membranous.
The term is also used in other arthropod groups such as crustaceans, arachnids and myriapods.
Sternites on the pleon (abdomen) of a crustacean may be referred to as pleonsternites. These are the sites of attachment of the pleopods (swimming legs).
In insects, the sterna are usually single, large sclerites, and external. However, they can sometimes be divided in two or more, in which case the subunits are called sternites, and may also be modified on the terminal abdominal segments so as to form part of the functional genitalia, in which case they are frequently reduced in size and development, and may become internalized and/or membranous.
The term is also used in other arthropod groups such as crustaceans, arachnids and myriapods.
Sternites on the pleon (abdomen) of a crustacean may be referred to as pleonsternites. These are the sites of attachment of the pleopods (swimming legs).
Arthropoda
Latreille, 1829
Subphyla and Classes
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Latreille, 1829
Subphyla and Classes
- Subphylum Trilobitomorpha
- Trilobita - trilobites (extinct)
- Subphylum Chelicerata
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thorax is a division of an animal's body that lies between the head and the abdomen.
In mammals, the thorax is the region of the body formed by the sternum, the thoracic vertebrae and the ribs. It extends from the neck to the diaphragm, not including the upper limbs.
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In mammals, the thorax is the region of the body formed by the sternum, the thoracic vertebrae and the ribs. It extends from the neck to the diaphragm, not including the upper limbs.
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Insecta
Linnaeus, 1758
Orders
Subclass Apterygota
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Linnaeus, 1758
Orders
Subclass Apterygota
- * Archaeognatha (bristletails)
- * Thysanura (silverfish)
- * Infraclass Paleoptera (Probably paraphyletic)
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A sclerite (Greek skleros meaning "hard") is a hardened body part. The term is used in various branches of biology for various structures including hardened portions of sponges, but it is most commonly used for the hardened portions of arthropod exoskeletons.
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A sex organ, or primary sexual characteristic, as narrowly defined, is any of those anatomical parts of the body which are involved in sexual reproduction and constitute the reproductive system in a complex organism; namely:
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crustaceans (Crustacea) are a large group of arthropods, comprising approximately 52,000 described species [1], and are usually treated as a subphylum [2].
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Arachnida
Cuvier, 1812
Extant orders
Acarina
Amblypygi
Araneae
Opiliones
Palpigradi
Pseudoscorpionida
Ricinulei
Schizomida
Scorpiones
Solifugae
Uropygi
Arachnids are a class (Arachnida
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Cuvier, 1812
Extant orders
Acarina
Amblypygi
Araneae
Opiliones
Palpigradi
Pseudoscorpionida
Ricinulei
Schizomida
Scorpiones
Solifugae
Uropygi
Arachnids are a class (Arachnida
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Myriapoda
Latreille, 1802
Classes [1]
Chilopoda
Diplopoda
Pauropoda
Symphyla
Myriapoda is a subphylum of arthropods containing millipedes, centipedes and others.
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Latreille, 1802
Classes [1]
Chilopoda
Diplopoda
Pauropoda
Symphyla
Myriapoda is a subphylum of arthropods containing millipedes, centipedes and others.
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Maxillipeds are appendages modified to function as mouthparts. Particularly in the less advanced decapods, these can be very similar to the pereiopods. Pereiopods are primarily walking legs and are also used for gathering food.
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Herod_Archelaus
