Echiurida (phylum)
Esquema
Jerarquía
Descripción
Phylum containing primarily marine invertebrate sausage-shaped organisms with a flattened extension of the head that is curved along its lateral edges and sometimes shaped like a scoop or spoon to form a nonretractable anterior proboscis. Some respiration probably takes place across the body wall, but the hind gut is often utilized as a respiratory organ by drawing water through the anus.
URI original del concepto
Otros términos
- spoonworms [en]
- spoonworm [en]
- echiurids [en]
- Echiuroidea [en]