Webflatworm: [noun] any of a phylum (Platyhelminthes) of soft-bodied usually much flattened acoelomate worms (such as the planarians, flukes, and tapeworms) — called … The flatworms, flat worms, Platyhelminthes, or platyhelminths (from the Greek πλατύ, platy, meaning "flat" and ἕλμινς (root: ... Most turbellarians have pigment-cup ocelli ("little eyes"); one pair in most species, but two or even three pairs in others. A few large species have many eyes in clusters over the brain, … See more The flatworms, flat worms, Platyhelminthes, or platyhelminths (from the Greek πλατύ, platy, meaning "flat" and ἕλμινς (root: ἑλμινθ-), helminth-, meaning "worm") are a phylum of relatively simple bilaterian See more Distinguishing features Platyhelminthes are bilaterally symmetrical animals: their left and right sides are mirror images of each other; this also implies they have … See more The relationships of Platyhelminthes to other Bilateria are shown in the phylogenetic tree: The internal relationships of Platyhelminthes are shown below. The tree is not fully resolved. The oldest … See more • Miracidium • Regenerative medicine • Schistosoma See more Early classification divided the flatworms in four groups: Turbellaria, Trematoda, Monogenea and Cestoda. This classification had … See more An outline of the origins of the parasitic life style has been proposed; epithelial feeding monopisthocotyleans on fish hosts are basal in the Neodermata and were the first shift to parasitism … See more Parasitism Cestodes (tapeworms) and digeneans (flukes) cause diseases in humans and their livestock, whilst monogeneans can cause serious … See more
Flatworm Definition & Meaning Dictionary.com
WebFeb 10, 2024 · Pericelis tectivorum is the name that was bestowed to a rare species of large flatworm that is occasionally encountered in reef aquaria and can really shock reefers who don’t know what to make of it. If you’re familiar with the size of red planaria or the small species that sometimes grow on our LPS the newly named Pericelis tectivorum is truly … WebA planarian is one of the many flatworms of the traditional class Turbellaria. [2] [3] It usually describes free-living flatworms of the order Tricladida ( triclads ), [4] although this … how old are the beach boys
Pericelis tectivorum, the GIANT Predatory Flatworm
WebJan 19, 2024 · Flatworms have no actual eyes; instead they have “ocelli”, which are eyespots that can distinguish light and the direction it is coming from. The tiny black eye … WebThe ancient flatworms were the first animals to develop a central nervous system and a head with a brain. The head had eyes—the first in the animal world. The flatworm body is bilateral—the first body plan with that design. As hunters today, flatworms hunt prey with their head leading the way. Flatworms are hermaphrodites: an individual ... WebSep 19, 2014 · And what the world looks like to a snail with wormy eyes is anyone's guess, but I'm willing to bet it's somewhat dizzying. The worm, though, has a problem: Snails are largely nocturnal, and ... how old are the bee gees today