Astacus
Definition
Lowercase spelling form for the taxonomic genus Astacus (freshwater crayfish); used in regular text or in binomial species names (such as Astacus astacus, the European crayfish) to denote decapod crustaceans with a rigid exoskeleton and large claws. It represents a fundamental morphological unit in the study of European freshwater fauna, serving as an excellent ecological indicator for the purity of running waters.
Bilingual Equivalents
- Astacus
- Crayfish genus
Grammatical & Source Details
| Inflection Type | Invariable biological noun, used standardly across scientific databases without case shifts. |
| Formation | Latinate rendering of the classical Greek root layout, stabilized within the codes of zoological nomenclature. |
| Spelling / Pronunciation | [ˈæs.tə.kəs] |
| Source | International Code of Zoological Nomenclature and Academic Data |
Contextual Usage Examples
RO: În manualul de biologie, specia astacus astacus este oferită ca exemplu tipic pentru studiul sistemului nervos la crustacee.
EN: In the biology textbook, the species Astacus astacus is given as a typical example for studying the nervous system in crustaceans.
RO: Biologul a explicat că micul astacus nu poate supraviețui în râurile poluate cu reziduuri industriale grele.
EN: The biologist explained that the small astacus cannot survive in rivers polluted with heavy industrial residues.
RO: Analiza morfologică a arătat diferențe clare între un astacus autohton și speciile invazive aduse din America.
EN: The morphological analysis showed clear differences between a native astacus and invasive species brought from America.
Idioms & Phrases
Specia astacus / Astacus species variant
RO: Varietate biologică de crustacee care aparține acestui grup, adaptată la viața bentonică din lacurile curate.
EN: A biological variety of crustaceans belonging to this group, adapted to benthic life in clean lakes.
Morfologie de astacide / Astacus structural morphology
RO: Ansamblul trăsăturilor fizice (zece picioare, ochi compuși, uropode) care definesc anatomia exterioară a racilor.
EN: The set of physical traits (ten legs, compound eyes, uropods) defining the external anatomy of crayfish.
Habitatul tip astacus / Astacus aquatic habitat
RO: Albia pietroasă sau mâloasă a râurilor de munte unde crustaceele își pot săpa galerii ascunse sub maluri.
EN: The rocky or muddy bed of mountain rivers where crustaceans can dig hidden galleries under the banks.
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