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...
- 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...
- patterns such as spiral lines, bicolored bands, and axial markings. Its protoconch has a distinctive net-like sculpture, typical of the genus and related...
- Desmopteridae. The species are protandric hermaphrodites. There is no s****, no protoconch and no longer any supporting tissue. The body consists almost completely...
- Trochop**** of Haliotis asinina with calcified protoconch (pc) prior to torsion....
- 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...
- or protoconch is situated, if that is still present in the adult s**** (often it is lost or eroded away). The phrase apical whorls, or protoconch, means...
- molecules. In this way the larval s**** (protoconch) is formed. The construction of the haliotid protoconch is complete following torsion. These structures...
- more primitive nautiloids by the small size and globular shape of the protoconch, the so-called embryonic s****. Nautiloids have relatively large embryonic...