| 词条 | Citrine forktail |
| 释义 |
| image = Ischnura hastata.jpg |status = G5 |status_system = TNC | taxon = Ischnura hastata | authority = (Say, 1839) }} The citrine forktail (Ischnura hastata) is a damselfly of the family Coenagrionidae. DescriptionThis species is 20–27 mm in length, and its hindwing is 11–15 mm long; it is thus considerably smaller than most European members of the genus Ischnura. Adult males have a black head and thorax, with blue markings, and a largely yellow abdomen, with black markings on its upper surface. The term citrine refers to its yellowish colouration. Adult females are initially largely orange, marked with black above on the head and rear part of the abdomen. They undergo a colour change, through brown or olive to greyish, as they mature. Male citrine forktails are the only damselflies in the world with the pterostigma situated away from the leading edge of the wing. DistributionIt is native to North and South America, and there is a population on the Azores. The Azorean population is likely to have been present since the late 19th Century, it was not identified as this species until 1990. Life historyIn North America, this species has a typical dragonfly life-history. However, the population on the Azores reproduces by parthenogenesis, making it the only population of Odonata anywhere in the world known to reproduce by this means.[1] In the southern United States, adults are on the wing year-round, while farther north the flight season is from April to November, and in the Azores from May to August. References1. ^{{cite journal|last=Lorenzo-Carballa|first=M O|author2=Cordero-Rivera, A|title=Thelytokous parthenogenesis in the damselfly Ischnura hastata (Odonata, Coenagrionidae): genetic mechanisms and lack of bacterial infection|journal=Heredity|date=10 June 2009|volume=103|issue=5|pages=377–384|doi=10.1038/hdy.2009.65|pmid=19513091}} External links{{Commonscat|Ischnura hastata}}
Further reading
5 : Ischnura|Odonata of North America|Insects of South America|Arthropods of the Azores|Insects described in 1839 |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。