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...
- Trochop**** of Haliotis asinina with calcified protoconch (pc) prior to torsion....
- 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...
- 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...
- It contains 7 whorls, of which two vitreous and globular whorls in the protoconch. The s**** shows a con****uous central acute angle in the lower whorls...
- end of the protoconch. It is also strongly sculptured (mamillated), and at the end of the protoconch oblique striae can be seen. The protoconch is irregularly...
- molecules. In this way the larval s**** (protoconch) is formed. The construction of the haliotid protoconch is complete following torsion. These structures...
- organism inside a tube secreted from the embryonic form as a dome or protoconch, a semi-metamerism derived from the formation of mesoderm from the gastrovascular...
- consisted of an ovoid protoconch and several chambers. The protoconch had two layers, and several compartments - called "protoconch pockets" - formed between...
- Bactrotheca is an extinct genus of orthothecid hyolith with a bulbous "protoconch". DZIK, J. 1980. Ontogeny of Bactrotheca and related hyoliths. GFF, 102...