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Daphnia magna is a typical water flea of the genus Daphnia. The females reach up to 5 mm in size, the males about 2 mm, thus they are among the largest species in the genus. [ 2 ] The body is protected by a translucent carapace made of chitin , a transparent polysaccharide. [ 3 ]
Daphnia cephalata King, 1853; Daphnia chevreuxi Richard, 1896; Daphnia chilensis (Hann, 1986) Daphnia coronata Sars, 1916; Daphnia dadayana Paggi, 1999; Daphnia deserti Gauthier, 1937; Daphnia dolichocephala Sars, 1895; Daphnia ephemeralis (Schwartz & Hebert, 1985) Daphnia exilis Herrick, 1895; Daphnia fusca Gurney, 1907; Daphnia gelida (Brady ...
Coast Douglas-fir (Pseudotsuga menziesii ssp. menziesii) is the predominant tree, occupying up to 70% of the forest cover. Broadleaf evergreen trees are relatively few. Tree species of secondary importance are: Sugar pine (Pinus lambertiana), Ponderosa pine (Pinus ponderosa), White fir (Abies concolor).
Daphnia pulex (Cladocera: Daphniidae) These four orders make up a group of small crustaceans commonly called water fleas. Around 620 species have been recognised so far, with many more undescribed. [22] They are ubiquitous in inland aquatic habitats, but rare in the oceans. [11]
California also has 1,023 species of non-native plants, some now problematic invasive species, such as yellow star-thistle, that were introduced during the Spanish colonization, the California Gold Rush, and subsequent immigrations and import trading of the 18th, 19th and 20th centuries.
California's oldest tree, a Palmer's oak thought to be 13,000 to 18,000 years old, may be threatened by a proposed development, environmentalists say.
Daphnia magna. According to the World Registry of Marine Species, Cladocera is a synonym of the superorder Diplostraca, which is included in the class Branchiopoda. Both names are currently in use. The superorder forms a monophyletic group of 7 orders, about 24 families, and more than 11,000 species. Many more species remain undescribed.
Daphnia pulex is the most common species of water flea. [3] It has a cosmopolitan distribution : the species is found throughout the Americas, Europe, and Australia. [ 4 ] It is a model species , and was the first crustacean to have its genome sequenced.