| Onychogomphus uncatus | |
|---|---|
 | |
| Onychogomphus uncatus, female | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Odonata |
| Infraorder: | Anisoptera |
| Family: | Gomphidae |
| Genus: | Onychogomphus |
| Species: | O. uncatus |
| Binomial name | |
| Onychogomphus uncatus (Charpentier, 1840) | |
| Synonyms [1] | |
| |
Onychogomphus uncatus, the large pincertail or blue-eyed hook-tailed dragonfly, is a species of dragonflies belonging to the family Gomphidae. [2]
This species is present in Belgium, France, Germany, Italy, Spain, Portugal and Switzerland. [3]
These dragonflies can be encountered close to running water and lakes.
The adults of Onychogomphus uncatus grow up to 65 millimetres (2.6 in) long. The eyes are widely separated and bright-blue or gray-blue, never green. The front black line on the side of the thorax does not touch the midline. The yellow collar at the front of the thorax is interrupted by a black bar. It has four cells on the anal triangle of the rear wing, but no yellow line on the 'vertex'. Cercoids are always yellow.
This dragonfly is bigger and rarer than the small pincertail ( Onychogomphus forcipatus ), but they are rather similar. The two species can be distinguished on the basis of the shape and extension of the black markings, especially on the thorax and on the last abdominal segments.
Adults of these dragonflies can be found from mid April through late August. Their life cycle lasts about three years.
A dragonfly is a flying insect belonging to the infraorder Anisoptera below the order Odonata. About 3,000 extant species of dragonflies are known. Most are tropical, with fewer species in temperate regions. Loss of wetland habitat threatens dragonfly populations around the world. Adult dragonflies are characterised by a pair of large, multifaceted, compound eyes, two pairs of strong, transparent wings, sometimes with coloured patches, and an elongated body. 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.
Ischnura senegalensis, also known variously as common bluetail, marsh bluetail, ubiquitous bluetail, African bluetail, and Senegal golden dartlet, is a widespread damselfly of the family Coenagrionidae. It is native from Africa, through the Middle East, to southern and eastern Asia.
The Gomphidae are a family of dragonflies commonly referred to as clubtails or club-tailed dragonflies. The family contains about 90 genera and 900 species found across North and South America, Europe, Asia, Australia, and Africa. The name refers to the club-like widening of the end of the abdomen. However, this club is usually less pronounced in females and is entirely absent in some species.
Acisoma panorpoides, the Asian pintail, trumpet tail, or grizzled pintail, is a species of dragonfly in the family Libellulidae.
Brachythemis leucosticta, the banded groundling or Southern banded groundling, is a species of dragonfly belonging to the family Libellulidae. It is found in Sub-Saharan Africa.
Onychogomphus is a genus of dragonflies in the family Gomphidae. They are commonly known as pincertails.
Onychogomphus supinus is a species of dragonfly in the family Gomphidae. English names include lined claspertail and gorge claspertail.
Ophiogomphus cecilia, the green snaketail, green gomphid, or green club-tailed dragonfly, is a species of dragonfly in the family Gomphidae.
Gomphus flavipes, the river clubtail or yellow-legged dragonfly, is a species of dragonfly in the family Gomphidae. It is found in Europe. Its natural habitat are rivers and large streams. The dragonfly flies from June to September depending on the location.
Onychogomphus forcipatus, the small pincertail, green-eyed hooktail, or green-eyed hook-tailed dragonfly, is a species of dragonfly belonging to the family Gomphidae.
Potamarcha congener, also known as the yellow-tailed ashy skimmer, common chaser, or swampwatcher, is a species of dragonfly in the family Libellulidae. It was first described by Jules Pierre Rambur in 1842, almost fifty years before Friedrich Karsch described its genus. Potamarcha congener is one of two species making up the genus Potamarcha, together with Potamarcha puella.
Merogomphus longistigma is a species of large dragonfly in the family Gomphidae. It is endemic to the forest streams of Western Ghats of India.
Microgomphus souteri is a species of small dragonfly in the family Gomphidae. It is endemic to the forest streams of Western Ghats of India.
Melligomphus acinaces is a species of dragonfly in the family Gomphidae. It is endemic to the streams of Western Ghats of India. This species was originally described as a Onychogomphus. However, both the pattern and the shape of the anal appendages do not fit Onychogomphus but are very close to those of the species placed in Melligomphus.
Lamelligomphus nilgiriensis is a species of dragonfly in the family Gomphidae. It is endemic to the hill streams of Western Ghats of India. This species has been placed by many authors in Onychogomphus but should be included in Lamelligomphus following Fraser (1934), based on the shape of the male anal appendages.
Paragomphus lineatus, the lined hooktail, is a species of dragonfly in the family Gomphidae. It is a widespread species; recorded from India to Turkey.
Nychogomphus striatus is a species of dragonfly in the family Gomphidae. It is endemic to the streams of Western Ghats of India. Reports from Nepal require further studies.
Burmagomphus cauvericus is a species of dragonfly in the family Gomphidae. It was earlier known only from the banks of Kaveri river in Kodagu district. It is recently recorded from Kerala too.