Thoracic and abdominal sterna of a beetle. A Mesosternum, B Metasternum, 1 first abdominal sternite, 2-6 rest of sternites
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,[1] 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. For a detailed explanation of the terminology, see [2]
Kinorhynchs have tergal and sternal plates too, though seemingly not homologous with those of arthropods.[3]
Ventrites are externally visible sternites. Usually the first sternite is covered up, so that vertrite numbers do not correspond to sternid numbers.
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 spiders, the sternum is the ventral part of the cephalothorax.
^W. Patrick McCafferty (1983). "Identifying aquatic insects". Aquatic Entomology: the Fishermen's and Ecologists' Illustrated Guide to Insects and their Relatives. Jones & Bartlett Publishers. pp. 17–27. ISBN978-0-86720-017-1.
^Hood (1958). "THE TERMS TERGUM AND STERNUM, TERGITE AND STERNITE" (PDF). Systematic Zoology. 7 (3): 131–133. doi:10.2307/2411977. JSTOR 2411977.
^Sørensen, M. V. et al. Phylogeny of Kinorhyncha based on morphology and two molecular loci. PLoS One 10, 1–33 (2015).
January 16, 2023
sternum, arthropod, anatomy, this, article, about, arthropod, body, part, vertebrate, breastbone, sternum, sternum, sterna, ventral, portion, segment, arthropod, thorax, abdomen, thoracic, abdominal, sterna, beetle, mesosternum, metasternum, first, abdominal, . This article is about the arthropod body part For the vertebrate breastbone see Sternum The sternum pl sterna is the ventral portion of a segment of an arthropod thorax or abdomen Thoracic and abdominal sterna of a beetle A Mesosternum B Metasternum 1 first abdominal sternite 2 6 rest of sternites 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 1 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 For a detailed explanation of the terminology see 2 Kinorhynchs have tergal and sternal plates too though seemingly not homologous with those of arthropods 3 Ventrites are externally visible sternites Usually the first sternite is covered up so that vertrite numbers do not correspond to sternid numbers 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 spiders the sternum is the ventral part of the cephalothorax See also EditTergiteReferences Edit W Patrick McCafferty 1983 Identifying aquatic insects Aquatic Entomology the Fishermen s and Ecologists Illustrated Guide to Insects and their Relatives Jones amp Bartlett Publishers pp 17 27 ISBN 978 0 86720 017 1 Hood 1958 THE TERMS TERGUM AND STERNUM TERGITE AND STERNITE PDF Systematic Zoology 7 3 131 133 doi 10 2307 2411977 JSTOR 2411977 Sorensen M V et al Phylogeny of Kinorhyncha based on morphology and two molecular loci PLoS One 10 1 33 2015 Retrieved from https en wikipedia org w index php title Sternum arthropod anatomy amp oldid 1092557609, wikipedia, wiki, book, books, library,
