Ammonitids
Definition
Scientific name or comprehensive taxonomic classification (Ammonitida) that groups together the orders and families of true ammonites, characterized by shells with highly complex and branched suture lines. These fossil marine cephalopod mollusks dominated the seas during the Jurassic and Cretaceous periods, disappearing completely during the mass extinction at the end of the Mesozoic era.
Bilingual Equivalents
- Ammonitids
- Ammonitida order
Grammatical & Source Details
| Inflection Type | Plural noun form, treated as an invariable scientific group name in high-level biological metrics. |
| Formation | Taxonomic suffix adaptation derived from standard Latinized family structures for fossil cephalopods. |
| Spelling / Pronunciation | [a.mo.ni.ˈti.de] |
| Source | Treatise on Invertebrate Paleontology and Ammonoid Phylogeny Guides |
Contextual Usage Examples
RO: Ordinul cuprinde numeroase amonitide ale căror cochilii variază de la dimensiuni microscopice până la structuri de peste doi metri.
EN: The order includes numerous ammonitids whose shells range from microscopic sizes to structures exceeding two meters.
RO: Analiza filogenetică a demonstrat că aceste amonitide au dezvoltat strategii unice de flotabilitate în ocean.
EN: The phylogenetic analysis demonstrated that these ammonitids developed unique buoyancy strategies in the ocean.
RO: În straturile superioare ale cretacicului, diversitatea de amonitide a scăzut drastic înainte de impactul cu meteoritul.
EN: In the upper layers of the Cretaceous, the diversity of ammonitids dropped drastically before the meteorite impact.
Idioms & Phrases
Ordinul amonitide / Ammonitida order
RO: Grupare sistematică ce reunește toate cefalopodele mezozoice dotate cu septuri interne ondulate complex.
EN: A systematic grouping that gathers all Mesozoic cephalopods equipped with intricately wavy internal septa.
Evoluție de amonitide / Ammonitid evolution
RO: Istoric filogenetic marcat de o diversificare rapidă și adaptări morfologice spectaculoase ale cochiliei în funcție de adâncimea apei.
EN: A phylogenetic history marked by rapid diversification and spectacular morphological adaptations of the shell based on water depth.
Fosilă de amonitide / Ammonitid fossil
RO: Urmă mineralizată utilizată ca indicator temporal extrem de precis pentru corelarea straturilor marine îndepărtate.
EN: A mineralized remain used as an extremely precise temporal indicator for correlating distant marine layers.
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