|
Placobdella
''Placobdella'' is a genus of leeches belonging to the family Glossiphoniidae. Species can grow up to 6.5 cm in length, have extremely close eyes and mouths located on the rim or near the anterior (front) sucker. —"based on keys and descriptions from Thorp & Covich (2016), Pennak (2001), Klemm (1985); by Michelle Dobrin, U of Windsor, 2017" The genus has almost . Species *'' |
Placobdella Ali
''Placobdella'' is a genus of leeches belonging to the family Glossiphoniidae. Species can grow up to 6.5 cm in length, have extremely close eyes and mouths located on the rim or near the anterior (front) sucker. —"based on keys and descriptions from Thorp & Covich (2016), Pennak (2001), Klemm (1985); by Michelle Dobrin, U of Windsor, 2017" The genus has almost . Species *'' |
Placobdella Appalachiensis
''Placobdella'' is a genus of leeches belonging to the family Glossiphoniidae. Species can grow up to 6.5 cm in length, have extremely close eyes and mouths located on the rim or near the anterior (front) sucker. —"based on keys and descriptions from Thorp & Covich (2016), Pennak (2001), Klemm (1985); by Michelle Dobrin, U of Windsor, 2017" The genus has almost . Species *'' |
Placobdella Bdellae
''Placobdella'' is a genus of leeches belonging to the family Glossiphoniidae. Species can grow up to 6.5 cm in length, have extremely close eyes and mouths located on the rim or near the anterior (front) sucker. —"based on keys and descriptions from Thorp & Covich (2016), Pennak (2001), Klemm (1985); by Michelle Dobrin, U of Windsor, 2017" The genus has almost . Species *'' |
Placobdella Bistriata
''Placobdella'' is a genus of leeches belonging to the family Glossiphoniidae. Species can grow up to 6.5 cm in length, have extremely close eyes and mouths located on the rim or near the anterior (front) sucker. —"based on keys and descriptions from Thorp & Covich (2016), Pennak (2001), Klemm (1985); by Michelle Dobrin, U of Windsor, 2017" The genus has almost . Species *'' |
Placobdella Burresonae
''Placobdella'' is a genus of leeches belonging to the family Glossiphoniidae. Species can grow up to 6.5 cm in length, have extremely close eyes and mouths located on the rim or near the anterior (front) sucker. —"based on keys and descriptions from Thorp & Covich (2016), Pennak (2001), Klemm (1985); by Michelle Dobrin, U of Windsor, 2017" The genus has almost . Species *'' |
Placobdella Parasitica
''Placobdella parasitica'' is a species of leech found in North America. Leeches are habitual ectoparasites of vertebrates in aquatic environments. ''Placobdella parasitica'' is differentiated from other members of the genus ''Placobdella ''Placobdella'' is a genus of leeches belonging to the family Glossiphoniidae. Species can grow up to 6.5 cm in length, have extremely close eyes and mouths located on the rim or near the anterior (front) sucker. References External links * * {{Taxonbar, from=Q5169854 Leeches Invertebrates of North America[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glossiphoniidae
Glossiphoniidae are a family of freshwater proboscis-bearing leeches. These leeches are generally flattened, and have a poorly defined anterior sucker. Most suck the blood of freshwater vertebrates like amphibians, crocodilians and aquatic turtles, but some feed on invertebrates like oligochaetes and freshwater snails instead. Although they prefer other hosts, blood-feeding species will opportunistically feed from humans. There is considerable interest in the symbiotic bacteria that at least some glossiphoniids house in specialized organs called bacteriomes. The bacteria are thought to provide the leeches with nutrients that are scarce or absent from their regular diets. '' Haementeria'' as well as '' Placobdelloides'' have Enterobacteriaceae symbionts, while '' Placobdella'' harbours peculiar and independently derived alphaproteobacteria. Systematics and taxonomy The relationships between members of Glossiphoniidae are not completely understood. Some sources divide the ... [...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] |
Cosmopolitan Distribution
In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of the world in appropriate habitats. Such a taxon, usually a species, is said to exhibit cosmopolitanism or cosmopolitism. The extreme opposite of a cosmopolitan species is an endemic one, being found only in a single geographical location. Qualification The caveat “in appropriate habitat” is used to qualify the term "cosmopolitan distribution", excluding in most instances polar regions, extreme altitudes, oceans, deserts, or small, isolated islands. For example, the housefly is highly cosmopolitan, yet is neither oceanic nor polar in its distribution. Related terms and concepts The term pandemism also is in use, but not all authors are consistent in the sense in which they use the term; some speak of pandemism mainly in referring to diseases and pandemics, and some as a term intermediate between endemism and cosmopolitanism, in effect regarding pandemism as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Say
Thomas Say (June 27, 1787 – October 10, 1834) was an American entomologist, conchologist, and Herpetology, herpetologist. His studies of insects and shells, numerous contributions to scientific journals, and scientific expeditions to Florida, Georgia, the Rocky Mountains, Mexico, and elsewhere made him an internationally known naturalist. Say has been called the father of American descriptive entomology and American conchology. He served as librarian for the Academy of Natural Sciences of Philadelphia, curator at the American Philosophical Society (elected in 1817), and professor of natural history at the University of Pennsylvania. Early life and education Born in Philadelphia into a prominent Religious Society of Friends, Quaker family, Thomas Say was the great-grandson of John Bartram, and the great-nephew of William Bartram. His father, Dr. Benjamin Say, was brother-in-law to another Bartram son, Moses Bartram. The Say family had a house, "The Cliffs" at Gray's Ferry Bridge, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leeches
Leeches are segmented parasitism, parasitic or Predation, predatory worms that comprise the Class (biology), subclass Hirudinea within the phylum Annelida. They are closely related to the Oligochaeta, 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 secr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
