Arhynchobdellida
Proboscisless leeches | |
---|---|
A giant Americobdella species from southern Chile. | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Annelida |
Clade: | Pleistoannelida |
Clade: | Sedentaria |
Class: | Clitellata |
Subclass: | Hirudinea |
Infraclass: | Euhirudinea |
Order: | Arhynchobdellida Blanchard, 1894 |
Suborders | |
Erpobdelliformes | |
Synonyms | |
Arhynchobdellae Stuart, 1982[verification needed] |
Arhynchobdellida, the proboscisless leeches, are a monophyletic order of leeches. They are defined by the lack of the protrusible proboscis that defines their sister taxon, the Rhynchobdellida.[1][2][3] Arhynchobdellida is a diverse order, compromising both aquatic and terrestrial, besides sanguivorous and predatory, leeches.[3] The order is divided into two suborders, Erpobdelliformes and Hirudiniformes (sometimes also called the Pharyngobdelliformes and Gnathobdelliformes, respectively).[1]
Taxonomy
Historically, the Arhynchobdellida were split into two orders, the Gnathobdellida and the Pharyngobdellida. Erpobdelliformes are jawless predators of aquatic invertebrates of varying sizes, including insect larvae, mollusks, and other annelids.[8][9] Unlike other leeches, they do not penetrate the skin of hosts; and are not at all parasitic.[10][11] The pharynx is spirally twisted and very large to allow for large prey; it can constitute up to one third of the leech's body length.[1]
Hirudiniformes are a diverse suborder defined by the presence of toothed jaws.[1][11]
Americobdellidae ?
Erpobdellidae
Salifidae
Americobdellidae ?
Cylicobdellidae
Haemadipsidae
Haemopidae
Hirudinidae
Praobdellidae
Xerobdellidae
Source:[12]
Erpobdelliformes
Hirudiniformes
Cladogram
Arhynchobdellida
Erpobdelliformes
Terrestrial, jawed*, carnivorous
Aquatic, jawless, carnivorous
Aquatic, jawless, carnivorous
Hirudiniformes
Terrestrial, jawed*, carnivorous
Terrestrial, jawed, carnivorous
Terrestrial, jawed, almost all sanguivorous
Semi-aquatic, jawed, sanguivorous
Terrestrial, jawed, carnivorous
Aquatic, jawed, sanguivorous
Terrestrial, jawed, sanguivorous
References