ammonitic

Thân thiện

The paleontologist carefully examines an ammonitic fossil in the lab.

Definition

1. Adjective:
   • Relating to ammonites: Pertaining to or characteristic of ammonites, an extinct order of marine mollusks (cephalopods) with coiled, chambered shells that are commonly found as fossils.
   • Relating to the fossil group: Of or connected to the scientific order Ammonoidea, which includes these fossilized cephalopods.

Usage Examples

• Adjective:
  • The museum displayed several ammonitic shells from the Jurassic period.
  • The study focused on the ammonitic suture patterns, which are complex and used for identification.
  • This rock layer is rich in ammonitic fossils.

Advanced Usage

• "ammonitic suture": A specific term in paleontology referring to the intricate, folded line where the internal walls (septa) of an ammonite shell meet the outer shell wall. The complexity of this suture is a key diagnostic feature.
  • The ammonitic suture of this specimen indicates it belongs to a highly evolved group.

Variants and Related Words

• Ammonite (n): The fossil itself; a member of the extinct cephalopod order Ammonoidea.
  • She found a beautifully preserved ammonite on the beach.
• Ammonoidea (n): The scientific order to which ammonites belong.
• Nautiloid (n): A related but distinct order of cephalopods, often compared with ammonites.

Synonyms

• Fossil cephalopod-related: Pertaining to the extinct shelled cephalopods.
• (Note: There are no direct common synonyms; the term is highly specific to paleontology.)

Related Phrases

• Ammonitic fauna: A phrase describing the assemblage of ammonite fossils in a particular geological stratum or region.
  • The ammonitic fauna of this formation suggests a deep marine environment.

Notes

• Word Origin: The adjective is derived from the modern Latin "Ammonites," from "Ammon" (the Egyptian god often depicted with ram's horns, which the coiled shells resemble) + the adjectival suffix "-ic."
• Field of Use: This term is almost exclusively used in scientific contexts, particularly in geology, paleontology, and evolutionary biology. It is not commonly used in everyday language.

Học thuật

Adjective

1. of or related to an order of fossil cephalopods