Two-spotted lady beetle

Two-spotted lady beetle

name = Two-spotted lady beetle

image_width = 200px
regnum = Animalia
phylum = Arthropod
classis = Insecta
ordo = Bug
subordo = Polyphaga
infraordo = Cucujiformia
superfamilia = Cucujoidea
familia = Coccinellidae
genus = "Adalia"
species = "A. bipunctata"
binomial = "Adalia bipunctata"
binomial_authority = (Linnaeus, 1758)
The two-spotted lady beetle ("Adalia bipunctata") is a carnivorous beetle of the family Coccinellidae and is very common in western Europe. It is used as a biological control agent against aphids, e.g. in greenhouses.

The most familiar form of the two-spot ladybird beetle is the red one with the two black spots. However, there also exists a black form with red spots on it. In addition, there are intermediate forms, but they occur only rarely in nature. . Inside the pupa, the adult develops. Finally the adult encloses from the pupa.

In some populations, the majority of the beetles are female. In these populations, 80-90% of the offspring of a females are female. The cause of this anomaly is the presence of a symbiotic bacteria living within the gametic cells of the female lady beetles. The bacteria is too large to live in the male gametes (sperm), so the bacteria can be transmitted to the next generation only through female gametes. When it ends up in a male, it will die when the male dies. Therefore, it kills most of the male embryos in the newly-laid eggs. These dead embryos then serve as food for their sisters when they emerge from their eggs. This trait is associated with a variety of different bacteria ("Wolbachia", "Rickettsia", "Spiroplasma"), which are present in between 0 and 20% of females, depending on locality.

The two spot ladybird also carries a sexually transmitted infection in Central and Eastern Europe. The infection is an ectoparasitic mite that transfers between male and female (and female and male) during copulation. The infection sterilizes female two spot ladybirds, and at some points of the year, up to 90% of adult 2-spots become infected.

External links


Wikimedia Foundation. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • Spotted lady beetle — Coleomegilla maculata Coleomegilla maculata on stem Scientific classification Kingdom: Animalia …   Wikipedia

  • Thirteen-spotted lady beetle — Taxobox name = Thirteen spotted lady beetle regnum = Animalia phylum = Arthropoda classis = Insecta ordo = Coleoptera familia = Coccinellidae genus = Hippodamia species = H. tredecimpunctata binomial = Hippodamia tredecimpunctata binomial… …   Wikipedia

  • lady beetle — noun small round bright colored and spotted beetle that usually feeds on aphids and other insect pests • Syn: ↑ladybug, ↑ladybeetle, ↑ladybird, ↑ladybird beetle • Hypernyms: ↑beetle • Hyponyms: ↑ …   Useful english dictionary

  • two-spotted ladybug — noun red ladybug with a black spot on each wing • Syn: ↑Adalia bipunctata • Hypernyms: ↑ladybug, ↑ladybeetle, ↑lady beetle, ↑ladybird, ↑ladybird beetle • Member Holonyms: ↑ …   Useful english dictionary

  • ladybird beetle — noun small round bright colored and spotted beetle that usually feeds on aphids and other insect pests • Syn: ↑ladybug, ↑ladybeetle, ↑lady beetle, ↑ladybird • Hypernyms: ↑beetle • Hyponyms: ↑ …   Useful english dictionary

  • ladybird beetle — /lay dee berrd / ladybug. Also called ladybird. [1730 40, Amer.; LADY (uninflected possessive case) Virgin Mary + BIRD; i.e. (our) Lady s bird] * * * ▪ insect also called  ladybug   any of approximately 5,000 widely distributed species of beetles …   Universalium

  • List of Latin and Greek words commonly used in systematic names — Contents 1 List of words 1.1 A 1.2 B 1.3 C …   Wikipedia

  • Quebec — This article is about the Canadian province. For the province s capital city, see Quebec City. For other uses, see Quebec (disambiguation). Coordinates …   Wikipedia

  • Karner Blue — Taxobox name = Karner Blue image width = 240px status = G2 status system = TNC regnum = Animalia phylum = Arthropoda classis = Insecta ordo = Lepidoptera familia = Lycaenidae genus = Lycaeides species = L. melissa subspecies = L. m. samuelis… …   Wikipedia

  • Coccinella septempunctata — Scientific classification Kingdom: Animalia Phylum …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”