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Platyhelminthes (from the Greek πλατύ, platy, meaning "flat" and ἕλμινς (root: ἑλμινθ-), helminth-, meaning "worm") [4] is a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates commonly called flatworms or flat worms.
California red-legged frog Rana draytonii: 2014 [2] Animal: California grizzly bear Ursus arctos californicus: 1958 Bat: Pallid bat. Antrozous pallidus. 2024 [3] Bird: California quail Callipepla californica: 1931 [4] Colors: Blue and gold Blue represents the sky, and gold represents the color of the precious metal found by forty-niners in the ...
According to the book Flags Over California, published by the California Military Department, the star on the flag recalled the 1836 California Lone Star Flag. Todd, in an 1878 letter to the Los Angeles Express, states that the star was drawn using blackberry juice and in recognition of the California Lone Star Flag. The bear was designed to be ...
More information on freshwater planarians and their biology; More information on the genetic screen to identify regeneration genes; YouTube videos: Planaria eating worm segment, Planarian; Schmidtea mediterranea, facts, anatomy, image at GeoChemBio.com; Alejandro Sanchez-Alvarado's Seminar: Regeneration in Planarians
Pseudoceros are simultaneous hermaphrodites [9] and reproduce sexually via random hypodermic insemination through the body tissue. [10] These organisms participate in penis fencing, [9] which is a behavior where the flatworms use their extended penises to stab and inseminate the other, while avoiding becoming inseminated themselves.
The Turbellaria are one of the traditional sub-divisions of the phylum Platyhelminthes (flatworms), and include all the sub-groups that are not exclusively parasitic.There are about 4,500 species, which range from 1 mm (0.039 in) to large freshwater forms more than 500 mm (20 in) long [3] or terrestrial species like Bipalium kewense which can reach 600 mm (24 in) in length.
Marine deep sea polychaetes under the genus Osedax will colonize at whale falls in many different oceans, using a symbiont that can digest the bones within the carcasses (Jones et al,2007) This earned them the common name of "boneworms," and they are speculated to be a keystone species of these types of environments due to lack of organisms in ...
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