head


head
See: cephalon [Martin, 2005].
(Order Cladocera):
Anterior of two divisions (tagmata) of body (head, trunk); Consists of five somites bearing antennules, antennae, mandibles, maxillules, and (reduced) maxillae. Bears compound and naupliar eyes and may be covered by a head shield. Not enclosed by carapace. (Clearly delimited/not clearly delimited; helmeted, rounded, with/without rostrum). (Syn. cephalon) [Stachowitsch, 1992].
(Order Notostraca):
Anterior of three divisions (tagmata) of body (head, thorax, abdomen). Consists of five somites bearing in part poorly developed antennules, antennae, mandibles, maxillules, and maxillae. Covered, along with thorax, by carapace; border between head and thorax indicated by cervical groove [Stachowitsch, 1992].
(Order Diplostraca):
Anterior of two divisions (tagmata) of body (head, trunk). Consists of five somites bearing antennules, antennae, mandibles, maxillules, and maxillae. Bears ventral rostrum, compound and nauplius eyes, and is typically entirely enclosed by carapace. (entirely/not entirely enclosed by carapace; with/without frontal appendage). (Syn. cephalon) [Stachowitsch, 1992].
(Order Anostraca):
Anterior of three divisions (tagmata) of bosy (head, thorax, abdomen). Consists of five somites bearing antennules, antennae, mandibles, maxillules, and maxillae. Also bears pair of compound eyes laterally and nauplius eye middorsally; superfically subdivided dorsally by transverse mandibular groove. (Syn. cephalon) [Stachowitsch, 1992].
(Class Cephalocarida):
Cephalon [Stachowitsch, 1992].
(Order Cumacea):
Cephalon [Stachowitsch, 1992].
(Order Tanaidacea):
Anterior of three basic divisions (tagmata) of body (head, thorax, abdomen). Consists of five somites with five pairs of appendages (antennules, antennae, mandibles, maxillules, maxillae); fused with first thoracic somite (bearing maxillipeds), this entire complex also being termed head [Stachowitsch, 1992].
(Order Decapoda):
Cephalon [Stachowitsch, 1992].
(Order Amphipoda):
Cephalon [Stachowitsch, 1992].
(Order Isopoda):
Cephalon [Stachowitsch, 1992].
(Order Mysida):
Anterior of three basic divisions (tagmata) of body (head, thorax, abdomen). Fused with anterior thoracic segments (thoracomeres) to form cephalothorax; covered by carapace [Stachowitsch, 1992].
(Order Stomatopoda):
Cephalon [Stachowitsch, 1992].
(Order Leptostraca):
Cephalon [Stachowitsch, 1992].
(Subclass Branchiura):
Cephalon [Stachowitsch, 1992].
(Subclass Cirripedia):
Anterior of typically two basic divisions (tagmata) of body (head, thorax; in ascothoracican: head, thorax, abdomen). If fully consists of five fused segments (somites) bearing antennules, antennae, mandibles, maxillules, and maxillae [Stachowitsch, 1992].
(Subclass Mystacocarida):
Cephalon [Stachowitsch, 1992].
(Class Ostracoda):
Anterior of two major regions (head, thorax) of body; unsegmented and not clearly delimited from thorax. Bears five pairs of appendages (cephalic appendages), including antennules, antennae, mandibles, maxillules, and maxillae as well as eye. Entirely enclosed in carapace. (Syn. cephalon) [Stachowitsch, 1992].
(Class Remipedia):
Cephalon [Stachowitsch, 1992].
(Superorder Syncarida):
Anterior of three major divisions (tagmata) of body (head, thorax, abdomen). Consists of basically five somites (bearing antennules, antennae, mandibles, maxillules, and maxillae), although in anaspidacean and stygocaridacean first thoracic somite (bearing maxillipeds) is fused to head. (See also cervical groove, rostrum). (Syn. cephalon) [Stachowitsch, 1992].
(Order Thermosbaenacea):
Cephalon [Stachowitsch, 1992].
(Order Euphausiacea):
Cephalon [Stachowitsch, 1992].

Crustacea glossary. . 2011.

Synonyms:

Look at other dictionaries:

  • Head — (h[e^]d), n. [OE. hed, heved, heaved, AS. he[ a]fod; akin to D. hoofd, OHG. houbit, G. haupt, Icel. h[ o]fu[eth], Sw. hufvud, Dan. hoved, Goth. haubi[thorn]. The word does not correspond regularly to L. caput head (cf. E. {Chief}, {Cadet},… …   The Collaborative International Dictionary of English

  • head — [hed] n. [ME hede, heved < OE heafod, akin to Ger haupt (OHG houbit, Goth haubith) < IE base * kaput (orig. prob. cup shaped) > L caput: merged in Gmc with word akin to OHG hūba, a cap, crest (Ger haube) < IE base * keu , to bend,… …   English World dictionary

  • head — ► NOUN 1) the upper part of the human body, or the front or upper part of the body of an animal, containing the brain, mouth, and sense organs. 2) a person in charge; a director or leader. 3) the front, forward, or upper part or end of something …   English terms dictionary

  • Head — ist der Familienname folgender Personen: Anthony Head (* 1954), englischer Schauspieler Antony Head, 1. Viscount Head (1906–1983), britischer Brigadegeneral der British Army sowie Politiker der Conservative Party Barclay V. Head (1844–1914),… …   Deutsch Wikipedia

  • Head — (h[e^]d), v. t. [imp. & p. p. {Headed}; p. pr. & vb. n. {Heading}.] 1. To be at the head of; to put one s self at the head of; to lead; to direct; to act as leader to; as, to head an army, an expedition, or a riot. Dryden. [1913 Webster] 2. To… …   The Collaborative International Dictionary of English

  • Head On — may refer to: * Head on collision, a type of vehicular collision. * Head On (album), a 1975 album by Bachman Turner Overdrive * Head On , a song originally recorded by The Jesus and Mary Chain and covered by the Pixies * Head On Memories of the… …   Wikipedia

  • head-on — adv 1.) crash/collide/smash etc head on if two vehicles crash etc head on, the front part of one vehicle hits the front part of the other 2.) if someone deals with a problem head on, they do not try to avoid it, but deal with it in a direct and… …   Dictionary of contemporary English

  • head-on — adj. 1. characterized by direct opposition; as, a head on confrontation. Syn: head to head. [WordNet 1.5] 2. Without evasion or compromise; as, his usual head on fashion; to meet a problem head on. Syn: downright, flat footed, forthright,… …   The Collaborative International Dictionary of English

  • head — [adj] most important; chief arch, champion, first, foremost, front, highest, leading, main, pioneer, preeminent, premier, prime, principal, stellar, supreme, topmost; concepts 568,574 Ant. auxiliary, inferior, lower, second, secondary, trivial,… …   New thesaurus

  • Head On — Entwickler Sega/Gremlin Publisher …   Deutsch Wikipedia

  • head-on — head on1 or ,head on adverb 1. ) if two vehicles crash head on, the front of one vehicle hits the front of the other 2. ) if you deal with a problem head on, you deal with it in a very direct way head on ,head on 2 adjective a head on crash is… …   Usage of the words and phrases in modern English


Share the article and excerpts

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

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.