Definition of Periostracum. Meaning of Periostracum. Synonyms of Periostracum

Here you will find one or more explanations in English for the word Periostracum. Also in the bottom left of the page several parts of wikipedia pages related to the word Periostracum and, of course, Periostracum synonyms and on the right images related to the word Periostracum.

Definition of Periostracum

Periostracum
Periostracum Per`i*os"tra*cum, n.; pl. Periostraca. [NL., fr. Gr. ? around + ? shell of a testacean.] (Zo["o]l.) A chitinous membrane covering the exterior of many shells; -- called also epidermis.

Meaning of Periostracum from wikipedia

- 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...
- In case such periostra**** pustules are removed, dark coloured spots still appear on the conch body. The Gauri Type (with periostra**** spots) of Valampuri...
- Allonautilus Allonautilus scrobiculatus s**** with periostra**** removed Scientific classification Domain: Eukaryota Kingdom: Animalia Phylum: Mollusca...
- 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...
- is the main component in the outer layer of the s****, known as the periostra****. The inner layers of the s**** are composed of a network of calcium carbonate...
- consists of iron sulphides, the middle layer is equivalent to the organic periostra**** found in other gastropods, and the innermost layer is made of aragonite...