Acanthoceras
Definition
A genus of extinct fossil cephalopod mollusks (ammonites) within the Acanthoceratidae family, characteristic of the Late Cretaceous epoch. These marine organisms were distinguished by their massive, planospiral coiled shells heavily ornamented with prominent ribs and rows of sharp tubercles or spine-like outgrowths along the outer whorls, serving as critical index fossils for dating geological strata of that period.
Bilingual Equivalents
- Acanthoceras
- Acanthoceras ammonite
Grammatical & Source Details
| Inflection Type | Proper scientific noun, masculine singular, grammatically static in its morphological structure. |
| Formation | Binomial descriptor built from Ancient Greek 'akantha' (thorn) and 'keras' (horn), describing the prickly horn-like fossil remains. |
| Spelling / Pronunciation | [ˌækənˈθɒsərəs] |
| Source | Treatise on Invertebrate Paleontology / Fossilworks Database |
Contextual Usage Examples
RO: Descoperirea unui exemplar de Acanthoceras în calcarele din carieră a permis datarea exactă a formațiunii geologice în Cenomanian.
EN: The discovery of an Acanthoceras specimen in the quarry limestones allowed the exact dating of the geological formation to the Cenomanian.
RO: Morfologia cochiliei la genul Acanthoceras arată o evoluție clară a tuberculilor pe măsură ce organismul ajungea la maturitate.
EN: The shell morphology in the Acanthoceras genus shows a clear evolution of tubercles as the organism reached maturity.
RO: Muzeul de istorie naturală a expus o colecție impresionantă de amoniți din grupul Acanthoceras.
EN: The natural history museum displayed an impressive collection of ammonites from the Acanthoceras group.
Idioms & Phrases
Fosilă directoare Acanthoceras / Acanthoceras index fossil
RO: Utilizarea acestui taxon în biostratigrafie datorită răspândirii sale globale largi și evoluției rapide într-un interval scurt de timp geologic.
EN: The utilization of this taxon in biostratigraphy due to its wide global distribution and rapid evolution within a short geological timeframe.
Ornamentație de tip Acanthoceras / Acanthoceras-type ornamentation
RO: Configurația structurală a cochiliei definită prin coaste transversale groase și noduri proeminente aliniate perimetral.
EN: The structural shell configuration defined by thick transverse ribs and prominent nodes aligned perimetrically.
Zonă biostratigrafică cu Acanthoceras / Acanthoceras biostratigraphic zone
RO: Subdiviziune a straturilor sedimentare marine definită exclusiv prin prezența dominantă a acestui gen de amoniți.
EN: A subdivision of marine sedimentary layers defined exclusively by the dominant presence of this ammonite genus.
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