The Gnathostomata are a superorder of sea urchins, including the familiar sand dollars. Gnathostomatans are irregular in shape, but unlike other irregular sea urchins, possess a feeding lantern. The mouth is located in the centre of the lower surface, as it is in most other sea urchins, but the anus is found to one side of the upper surface, rather than being central. The members of the group are adapted for burrowing in soft-bottomed marine environments.
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| - Gnathostomata (echinoid) (en)
- Gnatostomats (equinoderms) (ca)
- Gnathostomata (Echinoidea) (fr)
- Gnathostomata (Echinoidea) (pt)
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| - Els gnatostomats (Gnathostomata) són un antic superordre d'equinoderms equinoïdeus, avui en desús car s'ha comprovat que es un grup parafilètic, on s'incloïen els familiars dòlars de sorra, ara classificats al superordre Neognathostomata. Els Gnathostomata són de forma irregular, però al contrari que altres eriçons de mar irregulars, tenen una llanterna alimentadora. Estan adaptats a fer forats en fons marins tous. (ca)
- The Gnathostomata are a superorder of sea urchins, including the familiar sand dollars. Gnathostomatans are irregular in shape, but unlike other irregular sea urchins, possess a feeding lantern. The mouth is located in the centre of the lower surface, as it is in most other sea urchins, but the anus is found to one side of the upper surface, rather than being central. The members of the group are adapted for burrowing in soft-bottomed marine environments. (en)
- Les Gnathostomata constituent un super-ordre d'oursins irréguliers, généralement plats. (fr)
- Gnathostomata é uma superordem de equinodermes da classe Echinoidea, que inclui as espécies conhecidas pelo nome comum de bolacha-da-praia. (pt)
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| - Echinocyamus pusillus (en)
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| - Els gnatostomats (Gnathostomata) són un antic superordre d'equinoderms equinoïdeus, avui en desús car s'ha comprovat que es un grup parafilètic, on s'incloïen els familiars dòlars de sorra, ara classificats al superordre Neognathostomata. Els Gnathostomata són de forma irregular, però al contrari que altres eriçons de mar irregulars, tenen una llanterna alimentadora. Estan adaptats a fer forats en fons marins tous. (ca)
- The Gnathostomata are a superorder of sea urchins, including the familiar sand dollars. Gnathostomatans are irregular in shape, but unlike other irregular sea urchins, possess a feeding lantern. The mouth is located in the centre of the lower surface, as it is in most other sea urchins, but the anus is found to one side of the upper surface, rather than being central. The members of the group are adapted for burrowing in soft-bottomed marine environments. (en)
- Les Gnathostomata constituent un super-ordre d'oursins irréguliers, généralement plats. (fr)
- Gnathostomata é uma superordem de equinodermes da classe Echinoidea, que inclui as espécies conhecidas pelo nome comum de bolacha-da-praia. (pt)
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