inner lamella

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, lamella-like structure joined to outer wall (outer lamella) of valve. Secreted by epidermis; covers body except dorsally in hinge region. Junction with outer lamella along valve margin may be thickened to form duplicature. (membranous, calcareous) [Stachowitsch, 1992].

Crustacea glossary. . 2011.

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  • calcified inner lamella — (Class Ostracoda): Calcified part of the inner (medial) lamella of valve margin [Cohen, Peterson, and Maddocks, in press] …   Crustacea glossary

  • 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

  • inner margin — (Class Ostracoda): The inner or proximal edge of the calcified inner carapace lamella, forming an abrupt line or shelf in dead or fossil valves of Podocopida [Cohen, Peterson, and Maddocks, in press] …   Crustacea glossary

  • 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

  • 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… …   Crustacea glossary

  • 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

  • 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

  • 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 — 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

  • flange groove — (Class Ostracoda): Groove like depression along inner margin of valve. Separates major ridge (selvage) from flange on thickened part (duplicature) of inner lamella [Stachowitsch, 1992] …   Crustacea glossary

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