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Heterogyrus
''Heterogyrus milloti'' is a species of beetle in the family Gyrinidae, the only species in the genus ''Heterogyrus''. It is endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ... to Madagascar, and forms a basal lineage within the family, estimated to have diverged from all other gyrinids (aside from the even earlier branching '' Spanglerogyrus'') 200 million years ago. It is suggested to be closely related to the fossil genera '' Mesogyrus, Cretotortor'' and '' Baissogyrus'' which constitute the subfamily Heterogyrinae. References Gyrinidae Monotypic Adephaga genera {{Gyrinidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gyrinidae
The whirligig beetles are water beetles, comprising the family Gyrinidae, that usually swim on the surface of the water if undisturbed, though they swim underwater when threatened. They get their common name from their habit of swimming rapidly in circles when alarmed, and are also notable for their divided eyes which are believed to enable them to see both above and below water. (View wiki description) The family includes some 700 extant species worldwide, in 15 genera, plus a few fossil species. Most species are very similar in general appearance, though they vary in size from perhaps 3 mm to 18 mm in length. They tend to be flattened and rounded in cross section, in plain view as seen from above, and in longitudinal section. In fact their shape is a good first approximation to an ellipsoid, with legs and other appendages fitting closely into a streamlined surface. Whirligig beetles belong to the beetle suborder Adephaga, which also includes Ground beetle, ground beet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beetle
Beetles are insects that form the Taxonomic rank, order Coleoptera (), in the superorder Holometabola. Their front pair of wings are hardened into wing-cases, elytra, distinguishing them from most other insects. The Coleoptera, with about 400,000 described species, is the largest of all orders, constituting almost 40% of described arthropods and 25% of all known animal species; new species are discovered frequently, with estimates suggesting that there are between 0.9 and 2.1 million total species. However, the number of beetle species is challenged by the number of species in Fly, dipterans (flies) and hymenopterans (wasps). Found in almost every habitat except the sea and the polar regions, they interact with their ecosystems in several ways: beetles often feed on plants and fungi, break down animal and plant debris, and eat other invertebrates. Some species are serious agricultural pests, such as the Colorado potato beetle, while others such as Coccinellidae (ladybirds or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemism
Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can also be referred to as an ''endemism'' or, in scientific literature, as an ''endemite''. Similarly, many species found in the Western ghats of India are examples of endemism. Endemism is an important concept in conservation biology for measuring biodiversity in a particular place and evaluating the risk of extinction for species. Endemism is also of interest in evolutionary biology, because it provides clues about how changes in the environment cause species to undergo range shifts (potentially expanding their range into a larger area or b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spanglerogyrus
''Spanglerogyrus albiventris'' is a species of beetle in the family Gyrinidae The whirligig beetles are water beetles, comprising the family Gyrinidae, that usually swim on the surface of the water if undisturbed, though they swim underwater when threatened. They get their common name from their habit of swimming rapidly ..., the only species in the genus ''Spanglerogyrus''. It is native to North America, and was described in 1979 from specimens found in southern Alabama. It is the only living member of the subfamily Spanglerogyrinae, the earliest diverging extant lineage of the gyrinids which also includes '' Angarogyrus'' from the Jurassic and Cretaceous of Asia. References Gyrinidae Monotypic Adephaga genera {{Gyrinidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesogyrus
''Mesogyrus'' is an extinct genus of fossil beetles in the family Gyrinidae, containing the following species: at Joel Hallan's Biology Catalog. Texas A&M University. Retrieved on 9 May 2012. * †''Mesogyrus anglicus'' Ponomarenko et al. 2005 Durlston Formation, United Kingdom, *†''Mesogyrus antiquus'' Ponomarenko, 1973 Karabastau Formation, Kazakhstan, [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cretotortor
''Cretotortor'' is an extinct genus of fossil beetles in the family Gyrinidae, containing the following species: at Joel Hallan's Biology Catalog. Texas A&M University. Retrieved on 9 May 2012. * '' Cretotortor archarensis'' Ponomarenko, 1977 Darmakan Formation, Russia, Paleocene () * '' Cretotortor zherichini'' < ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baissogyrus
''Baissogyrus savilovi'' is an extinct species of fossil beetle in the family Gyrinidae, the only species in the genus ''Baissogyrus''. at Joel Hallan's Biology Catalog. Texas A&M University. Retrieved on 9 May 2012. It is named after the locality of the Early Cretaceous () , in |
