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Wildlife of Sri Lanka |
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Sri Lanka is a tropical island situated close to the southern tip of India. The invertebrate fauna is as large as it is common to other regions of the world. There are about two million species of arthropods found in the world, and still is counting.
The following list is about confirmed hemipterans recorded in Sri Lanka, though many new unconfirmed sightings are existent.
Phylum: Arthropoda
Class: Insecta
Order: Hemiptera
The Hemiptera order of insects includes the insects commonly known as the true bugs. The order includes planthoppers, leafhoppers, shield bugs, cicadas, aphids. More than 70,000 species are distributed worldwide. [1] Most hemipterans are plant sap feeders, some are parasitic, while the rest are predators who attack small insects and small invertebrates. Most species are terrestrial and a few are aquatic. Hemipterans are hemimetabolous, where young are similar to adults in the morphology. Hemipterans are economically important insects, where most of them are agricultural pests and vertebrate parasites. [2]
The following list provide the hemipterans currently identified in Sri Lanka. Sri Lanka is known to be home for 794 species of hemipterans included to 71 families. Detailed work of Sri Lankan hemipterans are recorded in book Catalogue of Hemiptera of Sri Lanka. [3] Sri Lanka comprises 74 species in 46 genera and 6 families of aphids within order Hemiptera. Two endemic aphid species found on Sri Lanka. Many researches have been carried out by different hemipteran families by local and overseas experts. [4] [5] [6] [7]
In 2009, M. Prashanthini and M. Vinobaba of Eastern University of Sri Lanka carried out experiments on mealybugs and identified 38 species of mealybugs from Sri Lanka with new exotic species. [8] [9] [10] [11] Un updated systematic catalogue of cicadas of South Asia have been published in 2016. According to that, 22 species of cicadas were recorded from Sri Lanka. [12] Chopra and Rustagi in 2012 published the characters of the subfamily Chauliopinae from India and Sri Lanka. [13]
In 2012, B. Vasantharaj David compiled the checklist and diversity of whiteflies of Sri Lanka with new records of seven species and new Pealius species from Sri Lanka. [14] Fourteen species belonging to eight genera of soft scales were identified with two introduced species from Sri Lanka. [15] The provisional checklist of the leafhoppers in Sri Lanka have been compiled by Dr. Rajendramani Gnaneswaran of the department of zoology, University of Jaffna. With her revision, 257 leafhopper species belonging to 120 genera have been identified from Sri Lanka. [16]
Ants are eusocial insects of the family Formicidae and, along with the related wasps and bees, belong to the order Hymenoptera. Ants evolved from vespoid wasp ancestors in the Cretaceous period. More than 13,800 of an estimated total of 22,000 species have been classified. They are easily identified by their geniculate (elbowed) antennae and the distinctive node-like structure that forms their slender waists.
Scale insects are small insects of the order Hemiptera, suborder Sternorrhyncha. Of dramatically variable appearance and extreme sexual dimorphism, they comprise the infraorder Coccomorpha which is considered a more convenient grouping than the superfamily Coccoidea due to taxonomic uncertainties. Adult females typically have soft bodies and no limbs, and are concealed underneath domed scales, extruding quantities of wax for protection. Some species are hermaphroditic, with a combined ovotestis instead of separate ovaries and testes. Males, in the species where they occur, have legs and sometimes wings, and resemble small flies. Scale insects are herbivores, piercing plant tissues with their mouthparts and remaining in one place, feeding on sap. The excess fluid they imbibe is secreted as honeydew on which sooty mold tends to grow. The insects often have a mutualistic relationship with ants, which feed on the honeydew and protect them from predators. There are about 8,000 described species.
Aprostocetus is a genus of hymenopteran insects of the family Eulophidae. The genus was erected by John O. Westwood in 1833. This very large group of parasitoid wasps has a global distribution.
Edward Ernest Green was a Ceylon-born English mycologist and entomologist who specialised in the scale-insects, Coccidae. An accomplished artist, and lithographer, he illustrated the five volume Coccidae of Ceylon.
Ochetellus glaber is a species of ant native to Australia. A member of the genus Ochetellus in the subfamily Dolichoderinae, it was described by Austrian entomologist Gustav Mayr in 1862. Aside from Australia, O. glaber has been introduced to a number of countries, including China, India, Japan, New Zealand, the Philippines and the United States, where it has established itself in Hawaii and Florida. It has been found on Lord Howe Island, New Caledonia, Norfolk Island, Réunion, New Zealand, and the Solomon Islands. Compared with other ants, O. glaber is a small species, with workers measuring 2–3 mm (0.079–0.118 in). Males are the smallest at 1.6 mm (0.063 in), while the queens measure 5.2–5.5 mm (0.20–0.22 in). The ant's colour ranges from brown to black.
In the 10th edition of Systema Naturae, Carl Linnaeus classified the arthropods, including insects, arachnids and crustaceans, among his class "Insecta". True bugs and thrips were brought together under the name Hemiptera.
Chandrashekaraswami Adiveyya Viraktamath is an Indian entomologist who specializes in the systematics of leaf-hoppers, Cicadellidae. He served as a professor of entomology at the University of Agricultural Sciences, Bangalore.
Scymnus (Scymnus) nubilus, is a species of lady beetle found in Pakistan, India, Bangladesh, Sri Lanka, Nepal, Myanmar, China, and Asia Minor.