Calothemis acigastraSelys, 1878
Lyriothemis acigastrais a species of dragonfly in the family of Libellulidae known from India. The International Union for Conservation of Nature also cites very old collections in Burma, China and Tibet.
A dragonfly is an insect belonging to the order Odonata, infraorder Anisoptera. Adult dragonflies are characterized by large, multifaceted eyes, two pairs of strong, transparent wings, sometimes with coloured patches, and an elongated body. Dragonflies can be mistaken for the related group, damselflies (Zygoptera), which are similar in structure, though usually lighter in build; however, the wings of most dragonflies are held flat and away from the body, while damselflies hold the wings folded at rest, along or above the abdomen. Dragonflies are agile fliers, while damselflies have a weaker, fluttery flight. Many dragonflies have brilliant iridescent or metallic colours produced by structural coloration, making them conspicuous in flight. An adult dragonfly's compound eyes have nearly 24,000 ommatidia each.
The skimmers or perchers and their relatives form the Libellulidae, the largest dragonfly family in the world. It is sometimes considered to contain the Corduliidae as the subfamily Corduliinae and the Macromiidae as the subfamily Macromiinae. Even if these are excluded, there still remains a family of over 1000 species. With nearly worldwide distribution, these are almost certainly the most often seen of all dragonflies.
India is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the south, the Arabian Sea on the southwest, and the Bay of Bengal on the southeast, it shares land borders with Pakistan to the west; China, Nepal, and Bhutan to the north; and Bangladesh and Myanmar to the east. In the Indian Ocean, India is in the vicinity of Sri Lanka and the Maldives; its Andaman and Nicobar Islands share a maritime border with Thailand and Indonesia.
The genus Lyriothemis is made up of 15 species and is widespread across Asia. Three species in the genus are known from India; L. cleis , L. tricolor and L. acigastra. All three were thought to be restricted to the northeastern states of Assam and West Bengal, but, in 2013, L. acigastra and L. tricolor were recorded in the southern state of Kerala.
Lyriothemis is a genus of dragonfly in the family Libellulidae and belong to the suborder Anisoptera, found in southeastern Asia. Some members of this genus lay their eggs in water-filled crevices and holes in trees and fallen logs.
Lyriothemis tricolor is a species of dragonfly in the family Libellulidae. It is found in Bangladesh, China, India, Japan, Myanmar, and Taiwan.
Assam is a state in northeast India, situated south of the eastern Himalayas along the Brahmaputra and Barak River valleys. Assam covers an area of 78,438 km2 (30,285 sq mi). The state is bordered by Bhutan and Arunachal Pradesh to the north; Nagaland and Manipur to the east; Meghalaya, Tripura, Mizoram and Bangladesh to the south; and West Bengal to the west via the Siliguri Corridor, a 22 kilometres (14 mi) strip of land that connects the state to the rest of India.
It is a small dragonfly with brown-capped greenish-yellow eyes. Its thorax is blackish brown, marked with yellow. There is a broad oval antehumeral (situated in front of the fore legs)stripe and a short transverse stripe bordering it just below. Laterally there are three stripes. The wings are transparent, and palely tinted with yellow at the extreme base. The abdomen in the male is blood-red, tapered from base to end, and marked with black. Segment 1 is black, with its apical border narrowly red. Segment 2 has its base broadly black and apical border less so. Segments 3 to 8 have the borders narrowly black and the mid-dorsal carina broadly so. This mid-dorsal black stripe dilate at the apical ends of 3 to 6. Segment 9 has only a narrow short red stripe on each side. Segment 10 is entirely black. The anal appendages are black.
The female is similar to the male, except that the abdomen is cylindrical rather than tapered from base to end and is a reddish-yellow color instead of blood red.
Little is known about the species's ecology or habitat, which could be because of its rarity and secretive nature. The specimens reported in 2013 were found in bushes around freshwater marshland and streams. Individuals were generally at their most active in the evening and morning; males rested at around 8 to 10 metres (26 to 33 ft) from the ground, and preyed upon skippers and small moths.
Ecology is the branch of biology which studies the interactions among organisms and their environment. Objects of study include interactions of organisms that include biotic and abiotic components of their environment. Topics of interest include the biodiversity, distribution, biomass, and populations of organisms, as well as cooperation and competition within and between species. Ecosystems are dynamically interacting systems of organisms, the communities they make up, and the non-living components of their environment. Ecosystem processes, such as primary production, pedogenesis, nutrient cycling, and niche construction, regulate the flux of energy and matter through an environment. These processes are sustained by organisms with specific life history traits. Biodiversity means the varieties of species, genes, and ecosystems, enhances certain ecosystem services.
In ecology, a habitat is the type of natural environment in which a particular species of organism lives. It is characterized by both physical and biological features. A species' habitat is those places where it can find food, shelter, protection and mates for reproduction.
Skippers are a family, the Hesperiidae, of the Lepidoptera. Being diurnal, they are generally called butterflies. They were previously placed in a separate superfamily, Hesperioidea; however, the most recent taxonomy places the family in the superfamily Papilionoidea. They are named for their quick, darting flight habits. Most have their antenna tips modified into narrow, hook-like projections. More than 3500 species of skippers are recognized, and they occur worldwide, but with the greatest diversity in the Neotropical regions of Central and South America.
The species closely resembles the Sri Lankan species L. defonsekai , described in 2009.
Lyriothemis defonsekai is a species of dragonfly in the family Libellulidae. It is endemic to Sri Lanka.
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