Different species have different requirements for their larvae with regard to water depth, water movement and pH. Anisoptera dragonfliesZygoptera damselfliesand Anisozygoptera, which is made up of only two rare species in Japan and Nepal.
All damselflies are known to lay their eggs inside plant tissues; those that lay eggs underwater may submerge themselves for 30 minutes at a time, climbing along the stems of aquatic plants and laying eggs at intervals.
While there it engages in wing-clapping, the exact function of which is unknown. At left, an adult dragonfly Anisoptera.
Because of this, Odonata are said to be hemimetabolous, or undergo an "incomplete" or "gradual" metamorphosis.
Similarly, the nymphs larvae of the two groups differ. Dragonflies and damselflies begin their lives as nymphs, living underwater for a year of more. Longer periods of stagnant flight would interfere with thermoregulation.
Odonata The order Odonata, which means "Toothed Ones" Corbet, 1 includes both The taxonomy and distribution of dragonflies and damselflies. This style creates more thrust, but less lift than counter-stroking; synchronised-stroking, with forewings and hindwings beating together, is used when changing direction rapidly, as it maximises thrust; and gliding, with the wings held out, is used in three situations: It remains stationary with its head out of the water, while its respiration system adapts to breathing air, then climbs up a reed or other emergent plant, and moults ecdysis.
Rainfall varies according to the topography of the region. Some families are restricted to cool streams or rivers, others to ponds or still clear waters, and some to marshy places. Even today, every new collecting trip reveals species new for Iran whereas species new for science are still detected, although rarely.
They choose their prey according to size and seem less able to overpower larger prey than can dragonfly nymphs. Rhinocypha will bob up and down, often low over fast-flowing streams, displaying their bright-coloured bodies and wings.
Over new localities are integrated. Most of a dragonfly's life is spent in the larval stage where it molts from six to fifteen times.
The male also has an eyespot on the head, giving it the appearance of a cyclops. After emergence, carefully place the exuviae and new adult into a brown paper bag so that the fragile teneral can sit quietly and harden its skin. The wings of male dragoinflies are relatively longer and narrower than females in large species.
Even before hatching from the egg, differences in morphology of the egg distinguish dragonflies Anisoptera from damselflies Zygoptera. Gomphus Gomphus militaris, Sulpher-tipped Clubtail Male.
The earliest fossils so far discovered come from Upper Carboniferous Pennsylvanian sediments in Europe formed about million years ago. While both dragonflies and damselflies belong to the Odonata and share many common features, then are a number of noticeable differences as well.
The Odonata are known to be ancient insects. Of all their characteristics, the easiest way to tell a dragonfly or damselfly from other insects is by the size of the eyes and shape of the abdomen.
The transformation to the adult form sheds the gills in favor of two pairs of wings. Perched copulations usually last from five to ten minutes. One record from Morton Co. The head is large with very short antennae. Also, dragonflies do not have hinges enabling them to fold their wings together when resting, though damselflies do.
Calopteryx splendens mingrelica, C. The International Odonata Research Institute is devoted to the study of dragonflies and damselflies and is part of the Odonata Information Network.
Like modern-day dragonflies, the Protodonata were fast-flying with spiny legs that may have assisted in capturing prey; their wingspan was up to 75 centimeters 30 inches. This order is very diverse with about species, and its members are easy to observe.
The Meganeuridae differed from modern Odonata in a number of ways -- they lacked a nodus wing notch and pterostigma features of the wings and were enormous compared to modern species.List of Odonata species of Great Britain.
There are 57 recorded species of Odonata in Britain, made up of 21 damselflies (suborder Zygoptera) and 36 dragonflies (suborder Anisoptera). The following abbreviations are used to give country-by-country distribution information for the breeding species.
Checklist of the dragonflies (Odonata) of Iran with new records and notes on distribution and taxonomy Iran has a complex dragonfly fauna influenced by contacts and overlaps of different geographical zones.
The dragonfly and its young are carnivores, with adult dragonflies feasting mainly on flies, mosquitoes, bees and small invertebrate insects, while the larvae of the dragonfly feed on aquatic insects and insect eggs found on the water.
taxonomy, evolutionary history, ecology, distribution, morphological characteristics, behavioral characteristics, reproduction, and conservation. Also has pictures and 9 sourcesOdonata:The DragonflyThe dragonfly is an insect of the order Odonata, which /5(7).
Dragonfly nymphs are shorter and bulkier, and the gills are located inside the abdomen. The distribution of various groups and species of Odonata is highly variable. Field Ecology, Zoogeography, and Taxonomy of the Odonata of Western Himalaya, India.
New Delhi. Michael F. Land, The Resolution of Insect Compound Eyes. Israel. A dragonfly is an insect belonging to the order Odonata, infraorder Anisoptera (from Greek ἄνισος anisos, "unequal" and πτερόν pteron, "wing", because the hindwing is broader than the forewing).Download