Agriocnemis femina oryzae Lieftinck, 1962 杯斑小蟌(白粉細蟌)

Insect   ID Source : 白粉細蟌 Agriocnemis femina oryzae (Lieftinck, 1962) http://www.gaga.url.tw/new23/s3-44.htm

http://dragonfly002.blog13.fc2.com/blog-entry-56.html

Species list of Agriocnemis

http://zipcodezoo.com/Animals/A/Agriocnemis_femina.asp

| English | Simplified Chinese | Traditional Chinese |

Found in China, Guandong, Guangxi, Hong Kong, Hainan, Japan, Taiwan

Genus : Agriocnemis

Super-Family: COENAGRIONOIDEA Family: COENAGRIONIDAE

白粉细蟌

白粉细蟌的胸部好像洒上白粉,跟它未熟时完全不一样,因为白粉细蟌未熟时都是红色的,而白粉细蟌的翅痣黑色的也是它的特点.

有身上有着白粉的性成熟雄虫,全身绿色的未性成熟雄虫也有.

本种与橙尾细蟌为最小的细蟌,外观近似,但成熟的雄虫可从攫握器辨识,橙尾细蟌上下攫握器较短平齐,本种雄虫则下攫握器长于上攫握器辨识特征,体长约20mm,腹部长约15mm,后翅长约9mm。

雄虫之复眼上半部黑色,下半部绿色。胸部上半部黑色,下半部绿色;翅透明,翅痣淡褐色。性成熟的雄虫在胸部会产生大量的白粉。腹部上半部黑色,下半部黄绿色,

未性成熟之雄虫腹部第8~10节橙红色,性成熟后此一橙红色部分变为黑色。雌虫体型与雄虫同大,未性成熟时体色以红色为主,性成熟后变为绿色。雄虫之尾部附器,上附器较下附器小,此点特征是分辨橙尾细蟌与本种之最大依据。

雌虫体型与雄虫同大,未性成熟时体色以红色为主,性成熟后变为绿色,前胸背板后缘有突起。本种之近似种为橙尾细蟌。常可见成群的成虫栖息、交尾,也可见它们将卵产在沉浸于水中的植物茎干内。(细蟌科)体长21-25,雄虫上唇黑色,,腹背黑色,腹面绿色,腹末端具不明显的橙红色分布,

未熟雄虫近似雌虫,但腹末端橙色明显雌虫:雌虫不具白粉,合胸侧视绿色,腹部背侧黑褐色,腹侧草绿色未熟雌虫体色橙红色


Finally Agriocnemis femina oryzae mate - in a windy and bright shining morning. See photo detail...


Exoskeleton

Exoskeleton - I found an exoskeleton st the same spot where the immature Agriocnemis femina oryzae are. ...... see more photo detail...

mature  
  mature

A mature female is the most difficult to spot. It seem female population of this species is less and even less to be able to get into maturity.  Here is a valuable one... see photo detail...
  immature

An Immature male Agriocnemis femina oryzae  can be easily mistaken as another species as mature and immature are very different in color. See more photo detail...

Agriocnemis femina oryzae so far is known to be pray by Damselflies of larger species and Spider. More...


Hungry female Agriocnemis femina oryzae after laying eggs need good foods too.  This was taken in the afternoon around 3:00pm.  Is she the one above I found matting in the morning ? Most probable.  See photo detail...


白粉细蟌

Agriocnemis femina oryzae Lieftinck, 1962 http://www.tspes.tpc.edu.tw


橙尾细蟌

Agriocnemis pygmaea (Rambur, 1842)

egg laying : http://www.earthlife.net/insects/odonata.html

学名:  白粉细蟌 Agriocnemis femina oryzae
身长:    腹部長15~ 18mm
取食方式:  咀嚼式
科目/科类: 豆娘/蜻蛉目  细蟌科
生活史:  卵→稚虫→成虫(半行变态)
习性简介:

栖息在平地到低海拔山区沼泽、水田、田沟, 池塘等静水域环境。 肉食性昼行性昆虫
 


成熟个体

雄♂熟

雌♀熟

熟雄虫胸背胸腹布满白色粉末,腹部褐色,末端橙红色

 

熟雌虫胸部灰绿色,腹部背部黑色,侧面淡绿色 部份个体近似雄虫,胸部具白粉、黑色班。

未熟个体

雄♂未熟

雌♀未熟

未熟雄虫胸背面黑色,侧面草绿色,腹部末端橘色




未熟白粉细蟌近似橙尾细蟌,两种难以区分

未熟雌虫体色红色,胸部背面黑色,腹部末端背面褐色



 

 




胸部

胸部

 
胸部及各脚腿节布满白粉 胸部灰绿色

       
       
       

Agriocnemis femina femina (Brauer, 1868)


Agriocnemis minima Selys, 1877


Agriocnemis nana (Laidlaw, 1914)

 

  • INDEX : Dragonfly     October 08, 2016 09:02:30 PM