somite

somite
A body segment, especially of the abdomen [Chace and Hobbs, 1969].
Body segment, as in abdominal somites 1-6 [Poore, 2004].
Body segment, especially of the abdomen [Butler, T.H.].
Division of body (head, thorax, abdomen) with exoskeleton comprising body-ring that is generally divisible into dorsal (tergite) and ventral (sternite) portions [Moore and McCormick, 1969].
Division of body, including exoskeleton, usually with pair of appendages [McLaughlin, 1980].
Each of the main divisions of the body [Perez Farfante and Kensley, 1997].
Segment of the body usually differentiated into dorsal tergite and ventral sternite and with a pair of appendages [Holdich and Jones, 1983].
(Order Cladocera):
One in a series of divisions of body. Head consists of five somites (bearing antennules, antennae, mandibles, maxillules, and reduced maxillae). Somites of trunk, especially of posterior region ("abdomen") , are indistinguishable, although trunk appendages reflect segmentation of anterior region ("thorax") [Stachowitsch, 1992].
(Order Notostraca):
One in a series of original divisions of body. Head consists of five somites, while somites of thorax and abdomen are variously fused to form units termed either segments or body rings [Stachowitsch, 1992].
(Order Diplostraca):
One in a series of divisions of body. Head consists of five somites, trunk of 10-32 somites (excluding telson). Posteriormost somites drawn out into series of spine-like projections dorsally. Telson occasionallu termed anal somite. (Syn. segment) [Stachowitsch, 1992].
(Order Anostraca):
One in a series of divisions of body. Head consists of five somites, followed by 11 (occasionally 17 or 19) thoracic somites (thoracomeres) and 8 abdominal somites. Last abdominal somite bears telson (anal somite). (Syn. segment) [Stachowitsch, 1992].
(Class Cephalocarida):
One in a series of divisions of body. Head (cephalon) consists of 5 somites (fused dorsally to form cephalic shield), followed by 8 thoracic somites (thoracomeres) and 11 abdominal somites. Last abdominal somite bears telson (anal somite). (Syn. segment) [Stachowitsch, 1992].
(Order Cumacea):
One in a series of divisions of body. Head consists basically of five somites, thorax of eight somites (thoracomeres), and abdomen of six somites (pleomeres) [Stachowitsch, 1992].
(Order Tanaidacea):
One in a series of divisions of body. Head consists of five somites (plus first thoracic somite), pereon of seven somites (pereonites), and abdomen (pleon) of six somites (pleomeres) [Stachowitsch, 1992].
(Order Tanaidacea):
One in a series of divisions of body. Head consists of five somites (plus first thoracic somite), pereon of seven somites (pereonites), and abdomen (pleon) of six somites (pleomeres) [Stachowitsch, 1992].
(Order Decapoda):
One in a series of divisions of body. Head (cephalon) consists of five somites (antennular, antennal, mandibular, maxillular, maxillar somites) excluding acron, thorax of eight somites (thoracomeres), and abdomen of six somites (pleomeres) excluding telson. Each somite basically consists of dorsal tergite, ventral sternite, and lateral pleurites [Stachowitsch, 1992].
(Order Amphipoda):
One in a series of divisions of body. Cephalon consists of five somites (cephalothorax of these five plus first thoracic somite), pereon of four to seven somites (pereonites), and pleon of six somites (pleomeres). See: urosomite [Stachowitsch, 1992].
(Order Isopoda):
Body segment, usually having a pair of appendages [Kensley and Schotte, 1989].
(Order Isopoda):
One in a series of divisions of body. Cephalon consists of five somites (cephalothorax of these five plus first thoracic somite), pereon of six or seven somites (pereonites), and pleon of basically six somites (pleomeres) [Stachowitsch, 1992].
(Order Mysida):
One in a series of divisions of body. Head consists basically of five somites, thorax of eight somites (thoracomeres), and abdomen of six somites (pleomeres). Anterior thoracomeres (bearing maxillipeds) may be fused with head. (Syn. segment) [Stachowitsch, 1992].
(Order Stomatopoda):
One in a series of divisions of body. Head (cephalon) consists of five somites (excluding acron), thorax of eight somites (thoracomeres), and abdomen of six somites (pleomeres) excluding telson. Each somites consists of dorsal tergite and ventral sternite and may be produced into lateral pleurites. (smooth, which carinae, denticulate) (see also antennular somite, ophthalmic somite). (Syn. segment) [Stachowitsch, 1992].
(Order Leptostraca):
One in a series of divisions of body. Head (cephalon) consists of five fused somites, thorax of eight, and abdomen of seven somites (excluding posterior telson) [Stachowitsch, 1992].
(Subclass Branchiura):
One in a series of divisions (segments) of body. Head (cephalon) consists of five somites plus first thoracic somite, pereon of three somites; abdomen is unsegmented. (Syn. segment) [Stachowitsch, 1992].
(Subclass Cirripedia):
One in a series of division of body. Head consists of five somites, thorax of six, and in ascothoracican, abdomen of four to five somites. (Syn. segment) [Stachowitsch, 1992].
(Subclass Copepoda):
A composite group of elements, usually exoskeletal, musculature, and nerve, which makes up a serially repeated component of the body [Ferrari and Dahms, in press].
(Subclass Copepoda):
A segment or division of the body [Boxshall and Halsey, 2004].
(Subclass Mystacocarida):
One in a series of divisions of body. Cephalon consists of five (fused) somites, followed by maxillipedal somite and nine thoracoabdominal somites. Last thoracoabdominal somite bears telson ("anal somite"). (Syn. segment) [Stachowitsch, 1992].
(Class Ostracoda):
One in a series of divisions of body. Basically, head (cephalon) consists of five cephalic somites, thorax of five thoracic somites (thoracomeres), and abdomen (pleon) of five abdominal somites (pleomeres). Variously fused to form more or less distinct body divisions (cephalosome, metasome, urosome). (Syn. segment) [Stachowitsch, 1992].
(Superorder Syncarida):
One in a series of divisions of body. Head consists basically of five somites, thorax of eight somites (thoracomeres), and abdomen of six somites (pleomeres). First thoracomere may be fused with head [Stachowitsch, 1992].
(Order Thermosbaenacea):
One in a series of division of body. Cephalon consists basically of five somitesd, thorax of eight somites (thoracomeres), and abdomen of six somites (pleomeres). Because first thoracomere is fused to cephalon, an alternate interpretation disintguishes six cephalic somites, seven thoracomeres or pereonites, and six pleonites [Stachowitsch, 1992].
(Order Euphausiacea):
One in a series of divisions of body. Head (cephalon) consists of five somites, thorax of eight somites (thoracomeres), and abdomen of six somites (pleomeres). Each somite basically consists of dorsal tergite, ventral sternite, and lateral pleurites. (Syn. segment) [Stachowitsch, 1992].

Crustacea glossary. . 2011.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • Somite — Transverse section of half of a chick embryo of forty five hours incubation. The dorsal (back) surface of the embryo is towards the top of this page, while the ventral (front) surface is towards the bottom …   Wikipedia

  • somite — [ sɔmit ] n. m. • 1893; en angl. (1869); du gr. sôma « corps » ♦ Embryol. Chacune des petites masses de tissu conjonctif résultant de la segmentation du mésoblaste situé de part et d autre du tube neural (⇒ métamère, métamérie), et dont… …   Encyclopédie Universelle

  • Somite — So mite (s[=o] m[imac]t), n. [Gr. sw^ma body.] (Anat. & Zo[ o]l.) One of the actual or ideal serial segments of which an animal, esp. an articulate or vertebrate, is composed; somatome; metamere. {So*mit ic}, a. [1913 Webster] …   The Collaborative International Dictionary of English

  • somite — somite. См. сомит. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Somite — Somite, Ursegmente, in der Embryonalentwicklung der Chordatiere durch Gliederung des dorsalen Mesoderms entstehende, hintereinander liegende Segmente, aus denen sich im Verlauf der ⇒ Organbildung Anteile der Haut, die Skelettmuskulatur und die… …   Deutsch wörterbuch der biologie

  • somite — [sō′mīt΄] n. [< SOMA1 + ITE1] 1. METAMERE 2. a blocklike segment of mesodermal tissue in the vertebrate embryo, giving rise to muscle, bone, etc. somitic [sōmit′ik] adj. somital [sō′mit l] …   English World dictionary

  • somite — a body segment. In the embryo an undifferentiated mesodermal component of an early trunk or tail segment or metamere, derived from paraxial mesoderm. The somite forms the myotome, sclerotome and perhaps dermatome …   Dictionary of ichthyology

  • somite — somital /soh mi tl/, somitic /soh mit ik/, adj. /soh muyt/, n. 1. any of the longitudinal series of segments or parts into which the body of certain animals is divided; a metamere. 2. Embryol. one member of a series of paired segments into which… …   Universalium

  • somite — noun Etymology: International Scientific Vocabulary, from Greek sōma body Date: 1869 one of the longitudinal series of segments into which the body of many animals is divided ; metamere …   New Collegiate Dictionary

  • Somite — D origine mésodermique, les somites sont des structures embryonnaires des Myomérozoaires, situées de part et d autre du tube neural et de la chorde et composées d unités répétées le long de l axe antéro postérieur de l embryon. Le mésoderme para… …   Wikipédia en Français

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”