Navicula uranops

Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). 86,600 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The number of additional fossil species is estimated between 60,000 and 100,000, and the proportion of undescribed extant species is very high.

Les mollusques (Mollusca) sont un embranchement d'animaux lophotrochozoaires. Ce sont des animaux non segmentés, à symétrie bilatérale parfois altérée. Leur corps se compose généralement d'une tête, d'une masse viscérale et d'un pied.

Los moluscos (Mollusca, del latín mollis; lit. ‘blando’) conforman uno de los grandes filos del reino animal. Son invertebrados protóstomos celomados, triblásticos de simetría bilateral (aunque algunos pueden tener una asimetría secundaria) no segmentados, de cuerpo blando, desnudo o protegido por una concha.