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Gammarus Mucronatus
''Gammarus mucronatus'' is a species of scud in the family Gammaridae. It is found in the coasts of the North American Atlantic seaboard and the Gulf of Mexico. Phylogenetics ''Gammarus mucronatus'' is part of the Arthropod phylum: it has an external skeleton - or cuticle - with a body made up of articulated segments-bearers of appendages which are themselves articulated, and a growth by molting. More specifically, ''G. mucronatus'' is a Malacostraca, which is the monophyletic group of the superior crustaceans. Malacostraca are subdivided in three subclasses: Phyllocarida, Hoplocarida and Eumalacostraca. Like the vast majority of the Malacostraca, ''G. mucronatus'' belongs to the Eumalacostraca and more specifically to the Peracarida. This superorder is characterized by the presence of a marsupium (an abdominal sac sheltering the eggs) formed by the oostegites, the flat and flared parts of the proximal segments of the legs. ''G. mucronatus'' belongs to the Amphipods, an order of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Say
Thomas Say (June 27, 1787 – October 10, 1834) was an American entomologist, conchologist, and Herpetology, herpetologist. His studies of insects and shells, numerous contributions to scientific journals, and scientific expeditions to Florida, Georgia, the Rocky Mountains, Mexico, and elsewhere made him an internationally known naturalist. Say has been called the father of American descriptive entomology and American conchology. He served as librarian for the Academy of Natural Sciences of Philadelphia, curator at the American Philosophical Society (elected in 1817), and professor of natural history at the University of Pennsylvania. Early life and education Born in Philadelphia into a prominent Religious Society of Friends, Quaker family, Thomas Say was the great-grandson of John Bartram, and the great-nephew of William Bartram. His father, Dr. Benjamin Say, was brother-in-law to another Bartram son, Moses Bartram. The Say family had a house, "The Cliffs" at Gray's Ferry Bridge, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gammaridae
Gammaridae is a family of amphipods. In North America they are included among the folk taxonomic category of " scuds", and otherwise gammarids is usually used as a common name. They have a wide distribution, centered on Eurasia, and are euryhaline as a lineage, inhabiting fresh to marine waters. Systematics The Gammaridae were for a long time used as a " wastebin taxon", which included numerous genera of gammaridean amphipods that since then have been removed to their own families, such as the Anisogammaridae, Melitidae, Niphargidae. The following genera are currently listed in the family: *'' Akerogammarus'' Derzhavin & Pjatakova, 1967 *'' Albanogammarus'' Ruffo, 1995 *'' Amathillina'' G. O. Sars, 1894 *'' Axelboeckia'' Stebbing, 1899 *'' Baku'' Karaman & Barnard, 1979 *'' Cephalogammarus'' Karaman & Barnard, 1979 *'' Chaetogammarus'' Martynov, 1924 *'' Comatogammarus'' Stock, 1981 *'' Condiciogammarus'' G. Karaman, 1984 *'' Dershavinella'' Birstein, 1938 *''Dikerogammaru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Synapomorphy
In phylogenetics, an apomorphy (or derived trait) is a novel character or character state that has evolved from its ancestral form (or plesiomorphy). A synapomorphy is an apomorphy shared by two or more taxa and is therefore hypothesized to have evolved in their most recent common ancestor. ) In cladistics, synapomorphy implies homology. Examples of apomorphy are the presence of erect gait, fur, the evolution of three middle ear bones, and mammary glands in mammals but not in other vertebrate animals such as amphibians or reptiles, which have retained their ancestral traits of a sprawling gait and lack of fur. Thus, these derived traits are also synapomorphies of mammals in general as they are not shared by other vertebrate animals. Etymology The word —coined by German entomologist Willi Hennig—is derived from the Ancient Greek words (''sún''), meaning "with, together"; (''apó''), meaning "away from"; and (''morphḗ''), meaning "shape, form". Clade analysis T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gammarus Mucronatus (I0980) (17253608060)
''Gammarus mucronatus'' is a species of scud in the family Gammaridae. It is found in the coasts of the North American Atlantic seaboard and the Gulf of Mexico. Phylogenetics ''Gammarus mucronatus'' is part of the Arthropod phylum: it has an external skeleton - or cuticle - with a body made up of articulated segments-bearers of appendages which are themselves articulated, and a growth by molting. More specifically, ''G. mucronatus'' is a Malacostraca, which is the monophyletic group of the superior crustaceans. Malacostraca are subdivided in three subclasses: Phyllocarida, Hoplocarida and Eumalacostraca. Like the vast majority of the Malacostraca, ''G. mucronatus'' belongs to the Eumalacostraca and more specifically to the Peracarida. This superorder is characterized by the presence of a marsupium (an abdominal sac sheltering the eggs) formed by the oostegites, the flat and flared parts of the proximal segments of the legs. ''G. mucronatus'' belongs to the Amphipods, an order of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gammarus
''Gammarus'' is an amphipod crustacean genus in the family Gammaridae. It contains more than 200 described species, making it one of the most species-rich genera of crustaceans. Different species have different optimal conditions, particularly in terms of salinity, and different tolerances; ''Gammarus pulex'', for instance, is a purely freshwater species, while ''Gammarus locusta'' is estuarine, only living where the salinity is greater than 25‰. Species of ''Gammarus'' are the typical " scuds" of North America and range widely throughout the Holarctic. A considerable number are also found southwards into the Northern Hemisphere tropics, particularly in Southeast Asia. Species The following species are included: Four new species were found in 2018 on the Tibetan Plateau. Four more new species were described from the Chihuahuan Desert in 2021. *''Gammarus abscisus'' G. Karaman, 1973 *''Gammarus abstrusus'' Hou, Platvoet & Li, 2006 *'' Gammarus acalceolatus'' Pinkster, 1970 *'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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