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Arhynchobdellida
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.Uttam, Suneha, and Seema Langer.Distribution and Identification key for species of freshwater leech genus Erpobdella Blainville, 1818 (Hirudinida: Arhynchobdellida: Erpobdelliformes: Erpobdellidae)."/ref> Arhynchobdellida is a diverse order, comprimising both aquatic and terrestrial, besides sanguivorous and predatory, leeches. The order is divided into two suborders, Erpobdelliformes and Hirudiniformes (sometimes also called the Pharyngobdelliformes and Gnathobdelliformes, respectively). Taxonomy Historically, the Arhynchobdellida were split into two orders, the Gnathobdellida and the Pharyngobdellida. The Gnathobdellida were jawed and carnivorous of parasitic while the Pharyngobdellida were jawless and carnivorous. Current taxonomy accepts the order Arhynchobdellida and divides into t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leech
Leeches are segmented parasitic or predatory worms that comprise the subclass Hirudinea within the phylum Annelida. They are closely related to the oligochaetes, which include the earthworm, and like them have soft, muscular segmented bodies that can lengthen and contract. Both groups are hermaphrodites and have a clitellum, but leeches typically differ from the oligochaetes in having suckers at both ends and in having ring markings that do not correspond with their internal segmentation. The body is muscular and relatively solid, and the coelom, the spacious body cavity found in other annelids, is reduced to small channels. The majority of leeches live in freshwater habitats, while some species can be found in terrestrial or marine environments. The best-known species, such as the medicinal leech, ''Hirudo medicinalis'', are hematophagous, attaching themselves to a host with a sucker and feeding on blood, having first secreted the peptide hirudin to prevent the blood from c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hirudinea
Leeches are segmented parasitic or predatory worms that comprise the subclass Hirudinea within the phylum Annelida. They are closely related to the oligochaetes, which include the earthworm, and like them have soft, muscular segmented bodies that can lengthen and contract. Both groups are hermaphrodites and have a clitellum, but leeches typically differ from the oligochaetes in having suckers at both ends and in having ring markings that do not correspond with their internal segmentation. The body is muscular and relatively solid, and the coelom, the spacious body cavity found in other annelids, is reduced to small channels. The majority of leeches live in freshwater habitats, while some species can be found in terrestrial or marine environments. The best-known species, such as the medicinal leech, ''Hirudo medicinalis'', are hematophagous, attaching themselves to a host with a sucker and feeding on blood, having first secreted the peptide hirudin to prevent the blood from c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erpobdelliformes
The Erpobdelliformes are one of the currently-accepted suborders of the proboscisless leeches (Arhynchobdellida). It includes five families: * Americobdellidae * Erpobdellidae Blanchard, 1894 * Gastrostomobdellidae Richardson, 1971 *Orobdellidae ''Orobdella'' is a genus of leeches. It is the only genus in the monotypic family Orobdellidae. They are large annelids, with the largest species (''Orobdella octonaria'') exceeding in length, but some are much smaller: mature individuals of ''Or ... Nakano, Ramlah & Hikida, 2012 * Salifidae Johansson, 1910 References Leeches {{Annelid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haemadipsidae
__NOTOC__ Haemadipsidae (From Greek "haima" and "dipsa" ("blood" and "thirst", respectively)) are a family of jawed leeches. They are a monophyletic group of hirudiniform proboscisless leeches. These leeches have five pairs of eyes, with the last two separated by two eyeless segments. The family is monotypic, containing only the subfamily Haemadipsinae, though as the family can apparently be divided into two or three distinct lineages, at least one of the proposed splits, while not a distinct family, might be a valid subfamily. Haemadipsids have two or three jaws. The two-jawed (duognathous) species were classified in a number of largely monotypic or non-monophyletic genera, so they were placed into a single monophyletic genus called ''Chtonobdella''. To increase grip, their caudal suckers have textured "friction" or "sucker" rays. Commonly known as jawed land leeches, these annelids are known from subtropical and tropical regions around the Indian and Pacific Ocean. Well-kn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hirudiniformes
The Hirudiniformes are one of the currently-accepted suborders of the proboscisless leeches (Arhynchobdellida). Their best-known member is the European medical leech, ''Hirudo medicinalis'', and indeed most of the blood-sucking "worms" as which leeches are generally perceived belong to this group. In general, though some leeches suck blood, many are predators which hunt small invertebrates. Taxonomy "Jawed leeches" - termed "Gnathobdellae" or "Gnathobdellida" - are exclusively found among the Hirudiniformes, but the order contains a number of jawless families as well. The jawed, toothed forms make up the aquatic Hirudidae and the terrestrial Haemadipsidae and Xerobdellidae (sometimes included in the preceding but worthy of recognition as an independent family). These might actually form a clade, which would then be placed at superfamily rank,The taxon would thus become "Gnathobdelloidea" according to ICZN rules, but the issue has neither been sufficiently studied nor formally ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhynchobdellida
Rhynchobdellida (from the Greek ''rhynchos'', mouth, and ''bdellein'', sucking), the jawless leeches or freshwater leeches, are an order of aquatic leeches. Despite the common name "freshwater leeches", species are found in both sea and fresh water. They are defined by the presence of a protrusible proboscis instead of jaws, and having colourless blood. They move by "inchworming" and are found worldwide. The order contains 110 species, divided into 41 genera and three families. Members of the order range widely in length, usually between 7 and 40 mm. They are hermaphrodite. The order is not monophyletic. Appearance and eating habits Instead of jaws and teeth, Rhynchobdellidae have protrusible proboscises, which they use to penetrate the host's skin. Mouths of Rhynchobdellidae species are small holes from which the proboscis can be protruded. The proboscis then sucks out the desired bodily fluid from the host: usually blood or coelomic fluid in the case of invertebrate vict ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Americobdella
''Americobdella'' is a genus of carnivorous leeches from southern Chile, comprising only the species ''Americobdella valdiviana''. Taxonomy Philippi, who originally classified ''A. valdiviana'' as an erpobdellid leech, noted that ''Americobdella valdiviana'' was similar to '' Trocheta'' (now synonymized with ''Erpobdella'') "in both appearance and habit". It is phylogenically between two major groups of leeches, the Rhynchobdellida and the Arhynchobdellida. Recent work has suggested ''A. valdiviana'' is more closely related to the Erpobdelliformes than the Hirudiniformes. Description ''Americobdella valdiviana'' is a predator and has only rudimentary jaws. Because of these features, it was originally classified as an erpobdellid leech. ''A. valdiviana'' is grey-coloured on the dorsal side with a yellowish ventral side. Whether eyes are present in this species is a matter of debate. While Philippi originally described ''Americobdella valdiviana'' as having no eyes, other author ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erpobdellidae
Erpobdellidae is a family of leeches. It is one of the four families belonging to the suborder Erpobdelliformes of the proboscisless leeches order, Arhynchobdellida. Their members have abandoned the blood feeding habits of their ancestors and are instead predators of aquatic invertebrates. The family previously contained seven genera, but Siddall (2002) synonymized five genera (''Croatobranchus'', ''Dina'', ''Mooreobdella'', ''Trocheta'' and ''Nephelopsis'') into the genus '' Erpobdella'' based on morphogenetic analysis, with the remaining genus ''Motobdella'' possibly a sister group and thus retained. This decision was not accepted by scientific community. The family currently contains 3 genera ''Erpobdella'', ''Dina'' and ''Motobdella''. The genus '' Mimobdella'' was also sometimes included within Erpobdellidae or Gastrostomobdellidae Gastrostomobdellidae is a family of annelids belonging to the order Arhynchobdellida. Genera: * ''Gastrostomobdella'' Moore, 1929 * ''Kumab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xerobdellidae
Xerobdellidae are a small family of jawed leeches in the order Arhynchobdellida. Xerobdellidae have three jaws and five pairs of eyes, the fourth and fifth being separated by one or two eyeless segments. The genera placed herein occur in Chile ('' Mesobdella''), Europe ('' Xerobdella'') and '' Diestecostoma'' is found in Central and northern South America. This peculiar distribution strongly suggests they are a relict Pangaean group, which had already been present by the start of the Jurassic 250 million years ago. (2008): On the classification, evolution and biogeography of terrestrial haemadipsoid leeches (Hirudinida: Arhynchobdellida: Hirudiniformes). '' Mol. Phylogenet. Evol.'' 46(1): 142–154. (HTML abstract) Description These leeches resemble the Haemadipsidae and were included there by many authors, but this has always been controversial. Their status as a distinct family is supported by sequence analysis of the nuclear 18S and 28S rDNA and mitochondrial COI genes as w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salifidae
Salifidae is a family of annelids belonging to the order Arhynchobdellida. Genera: * '' Barbronia'' Johansson, 1918 * '' Linta'' Westergren & Siddall, 2004 * '' Lumbricobdella'' Kennel, 1886 * '' Mimobdella'' * '' Odontobdella'' * '' Salifa'' Blanchard, 1897 References {{Taxonbar, from=Q18175159 Annelids ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cylicobdellidae
Cylicobdellidae is a family of leech Leeches are segmented parasitic or predatory worms that comprise the subclass Hirudinea within the phylum Annelida. They are closely related to the oligochaetes, which include the earthworm, and like them have soft, muscular segmented bodie ...es belonging to the order Arhynchobdellida. Genera The ''Interim Register of Marine and Non-marine Genera'' taxon details: Cylicobdellidae (retrieved 5 October 2022) lists 2 genera as currently accepted in this family: # '' Blanchardiella'' Weber, 1914 # '' Cylicobdella'' Grube, 1871 References {{Taxonbar, from=Q5145972[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semiscolecidae
Semiscolecidae is a family of annelids belonging to the order Arhynchobdellida. Genera: * '' Cyclobdella'' Weyenbergh, 1879 * '' Orchibdella'' Ringuelet, 1945 * '' Patagoniobdella'' Ringuelet, 1972 References {{Taxonbar, from=Q21217502 Annelids ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
