| Gyrinus gibbus | |
|---|---|
 | |
| Gyrinus gibbus from Cuenca | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Coleoptera |
| Family: | Gyrinidae |
| Genus: | Gyrinus |
| Species: | G. gibbus |
| Binomial name | |
| Gyrinus gibbus Aubé, 1838 | |
| Synonyms [1] | |
| |
Gyrinus gibbus is a species of aquatic beetle in the family Gyrinidae. It is native to the Neotropics.
The body of Gyrinus gibbus has an oval, convex shape and is between 4,5 mm and 6.0 mm long. [2] It is coloured black or dark brown with exception of the elytral margin, which is often coloured in a reddish or yellow tone. [2] The elytra are non-uniformly reticulated and vary from a polished appearance in the middle regions of the elytra to a bronze-metallic appearance towards the elytral margins. The species shows a high regional variability in body size, convexity, colouration and reticulation of the elytra, with specimens found in the Amazon region being less round and less convex. [2] Like all Gyrinid beetles Gyrinus gibbus has horizontally divided eyes, [3] allowing them to observe the surroundings underwater and on the surface alike. Gyrinus gibbus can be distinguished from the very similar Gyrinus ovatus by the harsher contrast between the polished and metallic areas on the elytra. Furthermore, the elytral apex of Gyrinus gibbus shows a complete border, while in Gyrinus ovatus the epipleural angle bears a spiky denticle. [2]
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Gyrinus gibbus feeds on small insects and spiders. [3]
Gyrinus gibbus is distributed in many parts of Latin America, including Argentina, Bolivia, Brazil, Colombia, Costa Rica, Ecuador, Mexico, Paraguay, Peru, Uruguay and Venezuela. [2] [4] Gyrinus gibbus prefers stagnant or slow flowing waters. [5] In Venezuela the species seems to be strongly associated with streams and river habitats [2] where it occurs in the calmer zones of those water bodies.
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. 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 beetles and diving beetles.
Gyrinus natator, the common whirligig beetle, is a species of beetle native to the Palearctic realm, including much of Europe. Its range extends northwards as far as Norway, Finland, and the Saint Petersburg area of Russia. It is an aquatic beetle and moves rapidly around on the surface or swims underwater in still or slow-moving fresh water.
Copelatus taprobanicus is a species of diving beetle endemic to Sri Lanka. It is part of the genus Copelatus in the subfamily Copelatinae of the family Dytiscidae. It was described by Wewalka & Vazirani in 1985.
Gelae is a genus of round fungus beetles belonging to the family Leiodidae. The beetles are found in different parts of Central and North America. They are small and rounded, feeding on slime moulds. They were originally placed in the genus Agathidium following the discovery of the first species, G. cognatum, in 1878. The taxonomic position was revised with description of new species in 2004 by American entomologists Kelly B. Miller and Quentin D. Wheeler. Upon creation of the new genus, the five new species are Gelae baen, G. belae, G. donut, G. fish, and G. rol.
Coelostoma (Holocoelostoma) stultum, is a species of water scavenger beetle widely distributed in Palearctic and Oriental realms from West Pacific towards Indian Ocean, such as China, Taiwan, Andaman Islands, Myanmar, India, Indonesia, Japan, Korea, Malaysia, Mascarene Islands, Nicobar Islands, Oman, Philippines, Saudi Arabia, South Korea, Sri Lanka, Thailand, United Arab Emirates, Oman, and Vietnam.
Coelostoma (Coelostoma) vitalisi, is a species of water scavenger beetle found in China, Taiwan, Japan, India, Indonesia, Japan, Malaysia, Nepal, Singapore, Sri Lanka, Cambodia, Thailand and Vietnam.
Pelthydrus suffarcinatus, is a species of water scavenger beetle endemic to Sri Lanka.
Porrorhynchus indicans, is a species of whirligig beetle found in Sri Lanka.
Stenotarsus sicarius, is a species of handsome fungus beetle found in Sri Lanka.
Hydroglyphus flammulatus, is a species of predaceous diving beetle found in India, Sri Lanka, Pakistan, Thailand, Cambodia, China, Taiwan, Korea, Myanmar, Bangladesh, Indonesia, Vietnam, and Nepal.
Cybister tripunctatus, is a species of predaceous diving beetle found in India, Andaman & Nicobar Islands, Sri Lanka, Afghanistan, Bangladesh, Myanmar, Nepal, Pakistan, Bhutan, China, Cyprus, Iran, Iraq, Japan, Kyrgyzstan, Mongolia, Russia, Syria, Tajikistan, Turkmenistan, Italy, Turkey, Uzbekistan and Europe.
Neptosternus starmuehlneri, is a species of predaceous diving beetle found in Sri Lanka.
Microdytes maculatus, is a species of predaceous diving beetle found in India, Thailand, Southern Andaman Islands, Sri Lanka, China, Thailand, Laos and Myanmar.
Arixyleborus malayensis, is a species of weevil found in India, Sri Lanka, China, Japan, Malaysia, Vietnam and Indonesia. This is the only species of Arixyleborus found in Japan and China.
Arixyleborus mediosectus, is a species of weevil found in India, Sri Lanka, Cambodia, Myanmar, Philippines, Malaysia, Indonesia: Sumatra and Vietnam.
Arixyleborus rugosipes, is a species of weevil native to India, Sri Lanka, Philippines, Malaysia, Borneo, Vietnam, Indonesia, and in Australia, Japan, Korea, New Zealand as an exotic species.
Megalocaria dilatata, is a species of lady beetle native to India, Sri Lanka and Bhutan.
Acalyptomerus asiaticus, is a species of fringe-winged beetle found in India, Sri Lanka, Malaysia and Thailand. It is also introduced to Jamaica.
Clambus ceylonicus, is a species of fringe-winged beetle endemic to Sri Lanka.
Aspidimorpha dorsata, is a species of leaf beetle widely distributed in South Asia and South East Asia.
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