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Petalifera
''Petalifera'' is a genus of sea slugs or sea hares, marine gastropod mollusks belonging to the family Aplysiidae, the sea hares. Some authors place this genus in a separate family Dolabriferidae. A new study, published in September 2004, has shown that the genus ''Petalifera'' is paraphyletic. (Note: Gastropod taxonomy has been in flux for more than half a century, and this is especially true currently, because of new research in molecular phylogeny. Because of all the ongoing changes, different reliable sources can yield very different classifications.) A more general description can be found on the page of the superfamily Aplysioidea. Description The parapodia (fleshy winglike outgrowths), as can be seen in photos of ''Petalifera petalifera'', are almost completely fused. The pair of small rounded flaps form the parapodial cavity over the mantle cavity and the vestigial shell. These sea hares swim by coiling and uncoiling the body. Species *'' Petalifera albomaculata'' F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petalifera Ramosa
''Petalifera'' is a genus of sea slugs or sea hares, marine gastropod mollusks belonging to the family Aplysiidae, the sea hares. Some authors place this genus in a separate family Dolabriferidae. A new study, published in September 2004, has shown that the genus ''Petalifera'' is paraphyletic. (Note: Gastropod taxonomy has been in flux for more than half a century, and this is especially true currently, because of new research in molecular phylogeny. Because of all the ongoing changes, different reliable sources can yield very different classifications.) A more general description can be found on the page of the superfamily Aplysioidea. Description The parapodia (fleshy winglike outgrowths), as can be seen in photos of ''Petalifera petalifera'', are almost completely fused. The pair of small rounded flaps form the parapodial cavity over the mantle cavity and the vestigial shell. These sea hares swim by coiling and uncoiling the body. Species *'' Petalifera albomaculata'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petalifera Petalifera
''Petalifera'' is a genus of sea slugs or sea hares, marine (ocean), marine gastropod mollusks belonging to the family (biology), family Aplysiidae, the sea hares. Some authors place this genus in a separate family Dolabriferidae. A new study, published in September 2004, has shown that the genus ''Petalifera'' is paraphyletic. (Note: Gastropod Taxonomy (biology), taxonomy has been in flux for more than half a century, and this is especially true currently, because of new research in molecular phylogeny. Because of all the ongoing changes, different reliable sources can yield very different classifications.) A more general description can be found on the page of the superfamily Aplysioidea. Description The parapodia (fleshy winglike outgrowths), as can be seen in photos of ''Petalifera petalifera'', are almost completely fused. The pair of small rounded flaps form the parapodial cavity over the Mantle (mollusc), mantle cavity and the vestigial shell. These sea hares swim by coi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petalifera Krusadalai
''Petalifera'' is a genus of sea slugs or sea hares, marine gastropod mollusks belonging to the family Aplysiidae, the sea hares. Some authors place this genus in a separate family Dolabriferidae. A new study, published in September 2004, has shown that the genus ''Petalifera'' is paraphyletic. (Note: Gastropod taxonomy has been in flux for more than half a century, and this is especially true currently, because of new research in molecular phylogeny. Because of all the ongoing changes, different reliable sources can yield very different classifications.) A more general description can be found on the page of the superfamily Aplysioidea. Description The parapodia (fleshy winglike outgrowths), as can be seen in photos of ''Petalifera petalifera'', are almost completely fused. The pair of small rounded flaps form the parapodial cavity over the mantle cavity and the vestigial shell. These sea hares swim by coiling and uncoiling the body. Species *'' Petalifera albomaculata'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petalifera Habei
''Petalifera'' is a genus of sea slugs or sea hares, marine gastropod mollusks belonging to the family Aplysiidae, the sea hares. Some authors place this genus in a separate family Dolabriferidae. A new study, published in September 2004, has shown that the genus ''Petalifera'' is paraphyletic. (Note: Gastropod taxonomy has been in flux for more than half a century, and this is especially true currently, because of new research in molecular phylogeny. Because of all the ongoing changes, different reliable sources can yield very different classifications.) A more general description can be found on the page of the superfamily Aplysioidea. Description The parapodia (fleshy winglike outgrowths), as can be seen in photos of ''Petalifera petalifera'', are almost completely fused. The pair of small rounded flaps form the parapodial cavity over the mantle cavity and the vestigial shell. These sea hares swim by coiling and uncoiling the body. Species *''Petalifera albomaculata'' Fa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aplysiidae
Aplysiidae is the only family in the superfamily Aplysioidea, within the clade Anaspidea. These animals are commonly called sea hares because, unlike most sea slugs, they are often quite large, and when they are underwater, their rounded body shape and the long rhinophores on their heads mean that their overall shape resembles that of a sitting rabbit or hare. Sea hares are however sea snails with shells reduced to a small plate hidden between the parapodia, and some species are extremely large. The Californian black sea hare, ''Aplysia vaccaria'' is arguably the largest living gastropod species, and is certainly the largest living heterobranch Gastropoda, gastropod. Description Members of the Aplysiidae have an atrophied inner shell (in contrast with the nudibranchs, which have no shell at all). In ''Aplysia'' and ''Syphonota'', this shell is a soft flattened plate over the visceral rear end, where it is fully or partially enclosed in the Mantle (mollusc), mantle skin. In ''Do ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Edward Gray
John Edward Gray (12 February 1800 – 7 March 1875) was a British zoologist. He was the elder brother of zoologist George Robert Gray and son of the pharmacologist and botanist Samuel Frederick Gray (1766–1828). The same is used for a zoological name. Gray was keeper of zoology at the British Museum in London from 1840 until Christmas 1874, before the natural history holdings were split off to the Natural History Museum. He published several catalogues of the museum collections that included comprehensive discussions of animal groups and descriptions of new species. He improved the zoological collections to make them amongst the best in the world. Biography Gray was born in Walsall, but his family soon moved to London, where Gray studied medicine. He assisted his father in writing ''The Natural Arrangement of British Plants'' (1821). After being blackballed by the Linnean Society of London, Gray shifted his interest from botany to zoology. He began his zoological ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caulerpa
''Caulerpa'' is a genus of seaweeds in the family Caulerpaceae (among the green algae). They are unusual because they consist of only one cell with many cell nucleus, nuclei, making them among the biggest single cells in the world. Referring to the crawling growth habit#Structure, habit of its thallus, the name means 'stem (that) creeps', from the Ancient Greek ' (, ‘stalk’) and ' (, ‘to creep’). Taxonomy and nomenclature First described by Jean Vincent Lamouroux in 1809, ''Caulerpa'' is the only genus under the family Caulerpaceae, from the order Bryopsidales, class Ulvophyceae, and phylum Chlorophyta. Through the use of ''tuf''A gene sequencing, it was revealed that ''Pseudochlorodesmis'' F. Børgesen was a sister clade of ''Caulerpa''. Cremen et al. proposed a new classification scheme in Bryopsidales, wherein Caulerpaceae and Halimedaceae were described as sister families. Species discrimination via morphology-based identification is often hampered by the high degr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlantic
The Atlantic Ocean is the second largest of the world's five oceanic divisions, with an area of about . It covers approximately 17% of Earth's surface and about 24% of its water surface area. During the Age of Discovery, it was known for separating the New World of the Americas (North America and South America) from the Old World of Afro-Eurasia (Africa, Asia, and Europe). Through its separation of Afro-Eurasia from the Americas, the Atlantic Ocean has played a central role in the development of human society, globalization, and the histories of many nations. While the Norse were the first known humans to cross the Atlantic, it was the expedition of Christopher Columbus in 1492 that proved to be the most consequential. Columbus's expedition ushered in an age of exploration and colonization of the Americas by European powers, most notably Portugal, Spain, France, and the United Kingdom. From the 16th to 19th centuries, the Atlantic Ocean was the center of both an eponymou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pacific
The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is bounded by the continents of Asia and Australia in the west and the Americas in the east. At in area (as defined with a southern Antarctic border), the Pacific Ocean is the largest division of the World Ocean and the hydrosphere and covers approximately 46% of Earth's water surface and about 32% of the planet's total surface area, larger than its entire land area ().Pacific Ocean . '' Britannica Concise.'' 2008: Encyclopædia Britannica, Inc. The centers of both the [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
