cephalic shield
1. (ARTHROPODA: Crustacea)
A chitinous, somewhat calcified covering of the head region formed of fused tergites of cephalic somites, commonly having pleura.
2. (MOLLUSCA: Gastropoda)
In Opisthobranchia, an expanded thickening of the dorsal surface of the head that may at times extend dorsally over the back.

Online Dictionary of Invertebrate Zoology. . 2005.

Look at other dictionaries:

  • cephalic shield — Chitinous or more or less calcified covering of the head region, formed of fused tergites of cephalic somites, commonly having pleura [McLaughlin, 1980]. Chitinous, more or less calcified covering structure of head region formed of fused tergites …   Crustacea glossary

  • head shield — See: cephalic shield [Brusca and Brusca, 2002]. (Order Cladocera): Variously developed, unpaired, shield like structure covering head [Stachowitsch, 1992]. (Class Cephalocarida): Cephalic shield [Stachowitsch, 1992]. (Class Remipedia): Cephalic… …   Crustacea glossary

  • Haminoeidae — Taxobox name = Haminoeidae regnum = Animalia phylum = Mollusca classis = Gastropoda subclassis = Orthogastropoda superordo = Heterobranchia ordo = Opisthobranchia subordo = Cephalaspidea superfamilia = Haminoeoidea familia = Haminoeidae… …   Wikipedia

  • carapace — ( ) [Baba, 2005]. Entire animal, right appendages omitted, dorsal view, based on Munida. [Baba, 2005] ( ) [Baba, 2005]. Carapace, spines, based on Munida. [Baba, 2005] Head Shield cuticular structure arising from posterior margin of cephalon,… …   Crustacea glossary

  • cephalon — A term that refers to the head of a crustacean [Brusca and Brusca, 2002]. Anterior region of the body bearing the antennules, antennae, eyes, mandibles, maxillules, and maxillae [Holdich and Jones, 1983]. Anteriormost tagma, bearing eyes, mouth,… …   Crustacea glossary

  • ala — One of pair of posteriorly directed cephalic shield extensions; in cirripeds (Balanomorpha), triangular lateral part of compartment plate delimited from paries, which is overlapped by adjacent compartment plate with or without radius. (Pl. alae)… …   Crustacea glossary

  • rostrum — (1) Anteriorly projecting, unpaired, usually rigid median extension of carapace between eyes or ocular peduncles; (2) anterior beaklike projection of valve margins overhanging incisure or notch (Ostracoda); (3) unpaired anteroventral plate of… …   Crustacea glossary

  • Haminoeoidea — Taxobox name = Haminoeoidea regnum = Animalia phylum = Mollusca classis = Gastropoda subclassis = Orthogastropoda superordo = Heterobranchia ordo = Opisthobranchia subordo = Cephalaspidea superfamilia = Haminoeoidea subdivision ranks = Families… …   Wikipedia

  • 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… …   Crustacea glossary

  • cephalosome — Head region when this includes only somites bearing maxillipeds or gnathopods, or both [Moore and McCormick, 1969]. (Subclass Copepoda): Head region with one or two fused thoracic somites (Copepoda) [McLaughlin, 1980]. (Subclass Copepoda): One of …   Crustacea glossary

Share the article and excerpts

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