Definition of Protoconch. Meaning of Protoconch. Synonyms of Protoconch

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

Definition of Protoconch

Protoconch
Protoconch Pro"to*conch, n. [Proto- + conch.] (Zo["o]l.) The embryonic shell, or first chamber, of ammonites and other cephalopods.

Meaning of Protoconch from wikipedia

- A protoconch (meaning first or earliest or original s****) is an embryonic or larval s**** which occurs in some classes of molluscs, e.g., the initial...
- sediment as the snail crawls. The larval s**** of a gastropod is called a protoconch. Most s****ed gastropods have a one piece s**** (with exceptional bivalved...
- Trochop**** of Haliotis asinina with calcified protoconch (pc) prior to torsion....
- Protoconch—a larval s**** of a mollusc; also refers to protoconch whorls of an adult s**** Teleoconch—all the whorls of a s**** after the protoconch whorls...
- molecules. In this way the larval s**** (protoconch) is formed. The construction of the haliotid protoconch is complete following torsion. These structures...
- consisted of an ovoid protoconch and several chambers. The protoconch had two layers, and several compartments - called "protoconch pockets" - formed between...
- s**** show a long tower-shaped protoconch or embryonic s**** of 5 whorls, which is usually lost in the adult. This protoconch is about 2.5 cm long and looks...
- s**** consists of 4½ whorls, including a blunt protoconch of 2 whorls,. The whorls of the protoconch are convex and apparently smooth, but microscopically...
- semidiaphanous. The s**** contains 7-8 whorls 7-8. The whorls of the protoconch are smooth, white, and globose. The third whorl is elegantly but microscopically...
- Anatomidae. The generic position is uncertain: Anatoma or Thieleella (protoconch sculpture unknown) The size of the s**** varies between 2 mm and 3 mm...