![]() ![]() Feeding habits īipalium species are predatory. Under this scenario, the genus Bipalium is defined as containing broad-headed land planarians with simple copulatory organs, without accessory ducts or copulatory bursa, and with a fold of tissue separating the male and female exit ducts. At first, they retained all broad-headed planarians in the genus Bipalium, but later split them into four genera based on the anatomy of the reproductive organs: Bipalium, Novibipalium, Humbertium, and Diversibipalium. Ogren and Masaharu Kawakatsu started a series of publications called "The Land Planarian Index series" in which they reviewed and organized all taxonomic information regarding land planarians. Towards the end of the 20th century, Robert E. ![]() Later, von Graff accepted Müller's conclusions. Josef Müller, in 1902, considered that no sufficient anatomical basis existed for this distinction, and reunited them under Bipalium. Placocephalus: flat head plate with a circular outline.Perocephalus: rudimentary head plate, not much broader than the body.Bipalium: with a well-developed head plate, much broader than long, and with elongated lateral auricles.Later, in 1899, Ludwig von Graff divided it into three genera according to the shape of the head: The genus Bipalium was initially defined by Stimpson to include land planarians with the head broadened, forming a head plate. The name Bipalium comes from Latin bi-, "two" + pala, "shovel" or "spade", because species in this genus resemble a pickaxe. Some studies have begun the investigation of the evolutionary ecology of these invasive planarians. Native to Asia, several species are invasive to the United States, Canada, and Europe. Land planarians are unique in that they possess a "creeping sole", a highly ciliated region on the ventral epidermis that helps them to creep over the substrate. They are often loosely called " hammerhead worms" or " broadhead planarians" because of the distinctive shape of their head region. Placocephalus von Graff, 1896 (in part)īipalium is a genus of large predatory land planarians. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |