| Palaeacanthocephala | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Proboscis of a Rhadinorhynchus species
|
||||||||||||
| Scientific classification | ||||||||||||
|
||||||||||||
| Orders | ||||||||||||
|
Echinorhynchida |
Palaeacanthocephala ("ancient thornheads") is a class within the phylum Acanthocephala. This article is about the taxonomic rank for the sequence of species in a taxonomic list see Taxonomic order In scientific classification used Polymorphida are an order of Thorny-headed worms ( Phylum Acanthocephala A class is the Taxonomic rank in the Biological classification of organisms in Biology below phylum and above order. A phylum ( Plural: phyla) is a Taxonomic rank between Kingdom and above Class. The Acanthocephala ( Greek ακανθος akanthos, thorn + κεφαλη kephale, head is a phylum of Parasitic worms known as The adults of these parasitic platyzoans feed mainly on fish, aquatic birds and mammals. Parasitism is a type of symbiotic relationship between Organisms of different Species. The Platyzoa (ˌplætɨˈzoʊə are a group of Protostome animals proposed by Thomas Cavalier-Smith in 1998 Fish are aquatic Vertebrate animals that are typically ectothermic (previously Cold-blooded) covered with scales, and equipped with two Birds ( class Aves) are bipedal endothermic ( Warm-blooded) Vertebrate animals that lay eggs. Mammals ( class Mammalia) are a class of Vertebrate Animals characterized by the presence of Sweat glands, including sweat glands
The nuclei of the hyperdermis {outer layer of skin) are fragmented and the males have two to seven cement glands unlike their relatives the Archiacanthocephala which always have eight. Archiacanthocephala is a class within the phylum of Acanthocephala.
Dapyx Software network: MP3 Explorer | Ebook Manager | Zenithic