outer lamella

outer lamella
(Class Ostracoda):
Relatively think outer wall of valve. Consists of a mineralized layer between two thinner, chitinous layers. (See also inner lamella) [Stachowitsch, 1992].
(Class Ostracoda):
The outer layer of epidermis and cuticle of the dorsal body fold forming the valve; may be calcified or uncalcified [Cohen, Peterson, and Maddocks, in press].

Crustacea glossary. . 2011.

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  • lamella — A broad, flattened appendage [Wilson, 1989]. Thin flat plate or scale. (Pl. lamellae) [Butler, T.H.]. (Subclass Cirripedia): Barnacle plate feature: in unstalked form, outer and inner walls of paries and radius. Separated by longitudinal septa… …   Crustacea glossary

  • lamella — n.; pl. ae [L. lamella, small plate] 1. A thin plate or leaflike structure. 2. (ARTHROPODA: Chelicerata) A triangular plate on the promargin of the cheliceral fang furrow in some spiders. 3. (MOLLUSCA: Gastropoda) Flared axial projection of the… …   Dictionary of invertebrate zoology

  • Lamella — A thin leaf, plate, disk, wafer. * * * 1. [TA] A thin sheet or layer (such as occurs in compact bone) or sublayer. 2. A preparation in the form of a medicated gelatin disk, used as a means of making local applications to the conjunctiva in place… …   Medical dictionary

  • inner lamella — (Class Ostracoda): Inner layer of epidermis and cuticle of the dorsal body fold forming the valve, entirely uncalcified or calcified only around the free margin [Cohen, Peterson, and Maddocks, in press]. (Class Ostracoda): Relatively thin,… …   Crustacea glossary

  • neural lamella — The noncellular outer covering of the central nervous system consisting of mucopolysaccharides and mucoproteins with collagen type fibrils in the outer part of this layer …   Dictionary of invertebrate zoology

  • vestibule — (Class Ostracoda): Along inner margin of valve, space formed between outer lamella and thickened part (duplicature) of inner lamella [Stachowitsch, 1992]. (Class Ostracoda): In Podocopa a marginal cavity between the outer valve lamella and… …   Crustacea glossary

  • freeze fracture — Method of specimen preparation for the electron microscope in which rapidly frozen tissue is cracked so as to produce a fracture plane through the specimen. The surface of the fracture plane is then shadowed by heavy metal vapour, strengthened by …   Dictionary of molecular biology

  • duplicature — (Class Ostracoda): Along inner margin of valve, thickened, calcified section of inner lamella. Space between outer lamella and duplicature is termed vestibule. Medially directed surface of duplicature contacts opposite member when carapace is… …   Crustacea glossary

  • flange — (Class Ostracoda): In closing apparatus of valve, ridge like inner margin formed by projecting outer lamella. Fits into flange groove of opposite valve. (See also list, selvage) [Stachowitsch, 1992]. (Class Ostracoda): Ridge along valve margin… …   Crustacea glossary

  • duplicature — n. [L. duplex, double] 1. A doubling; a fold. 2. (ARTHROPODA: Crustacea) In Ostracoda, the calcified inner lamella of a shell that extends along the free margin of the valve and is fused to the outer lamella …   Dictionary of invertebrate zoology

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