- The
periostra**** (/ˌpɛriˈɒstrəkəm/ PERR-ee-OS-trə-kəm) is a thin,
organic coating (or "skin") that is the
outermost layer of the s**** of many s****ed...
- the land
snail shown above) also have an
outer s****
layer called the
periostra**** which is
composed of the
protein conchiolin. Some land
snails (especially...
-
resembles the quahog, but the s**** of the
ocean quahog is rounder, the
periostra**** is
usually black, and on the
interior of the s****, the
pallial line...
- are
features of the s****,
including crease and an
encrusting layer (
periostra****) that
covers most of the s****.
Gills and
reproductive structures also...
- the
outermost layer,
which in
almost all
cases is all
conchiolin (see
periostra****).
Molluscs never use
phosphate to
construct their hard parts, with the...
-
prominent columellar plicae. It is
usually pure
white under a
heavy brown periostra****, but it can also be a pale
apricot color. It can
sometimes be dotted...
-
carbonate in a
protein matrix; and the
periostra****, an
outer pigmented layer resembling a skin. The
periostra**** is
composed of a
protein called conchin...
-
Allonautilus Allonautilus scrobiculatus s**** with
periostra**** removed Scientific classification Domain:
Eukaryota Kingdom:
Animalia Phylum: Mollusca...
- the s**** of most
species has a top s****
layer that is
thick brown periostra**** affixed to the
harder calcareous part of the s****. In some
species such...
- layers, an
outer periostra**** made of
organic compounds and two
biomineralized layers.
Articulate brachiopods have an
outermost periostra**** made of proteins...
