Hafan

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Croeso i:

Wicirywogaeth

Y cyfeirlyfr digidol rhydd ac am ddim y gall bawb ei olygu.

Mae'n cynnwys Animalia, Plantae, Fungi, Bacteria, Archaea, Protista a phopeth byw!

Ar hyn o bryd mae gennym 586,127 o erthyglau.

Mae Wicirywogaeth yn rhydd o berchnogaeth hawlfraint, fel bywyd ei hun!

Fforio'r tacson
Feirws (dosbarthiad dal yn ansicr)

Archwiliwch Wicirywogaeth

  • Cymorth – Gwybodaeth fanwl ar sut i olygu.
  • Tacsonomeg – Gwybodaeth ar Ddosbarthiad Linnaeans.
  • Tafarn – Trafodwch y prosiect.
  • Gwnaed ac ar waith – Cyfeiriadau manwl i gwmpas y gwaith a chynlluniau a thargedi
  • FAQs – Trafodaethau a phryderon
  • Canllawiau – Argymhellion ble y medrwch uwchlwytho lluniau
  • PR Wicirywogaeth – Sut i ledaenu a 'marchnata' Wicirywogaeth i'r byd mawr crwn.


Cydweithio gyda ZooKeys

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PhytoKeys Logo.svg

Cyhoeddwyd y byddwn yn cydweithio gyda ZooKeys. Mae PhytoKeys hefyd wedi ymuno gyda'r prosiect ers Tachwedd 2010. Mae lluniau a delweddau ZooKeys a PhytoKeys yn cael eu huwchlwytho i Gomin Wicimedia a'u defnyddio ar Wicirywogaeth.



Awduron o nod

Adriana Hoffmann Jacoby
Born 1940. Standard IPNI form: A.E.Hoffm.

As a Chilean botanist and environmentalist, Adriana Hoffmann Jacoby has authored over a dozen books on the flora of Chile and has identified and classified more than 100 new species of cacti. She was Chile's Environment Minister in 2000 and 2001. She has advocated for the sustainable management and protection of Chilean forests, leading opposition to illegal logging in her role as coordinator of Defensores del Bosque Chileno (Defenders of the Chilean Forest) since 1992.

Hoffmann was recognized by the United Nations in 1997 as one of the 25 leading environmentalists of the decade for her efforts to protect Chile's forests. In 1999 she won the National Environmental Prize in the category of Environmental Education, awarded by Comisión Nacional del Medio Ambiente (CONAMA). For her research into Chilean flora and her work in environmental education, Hoffmann received the Luis Oyarzún Award from the Austral University of Chile in 2003. She received a Fellow Award from the Cactus and Succulent Society of America in 2009.

Hoffmann has also served on the judging panel for the United Nations Environment Programme's Sasakawa Prize.

See also: Distinguished authors of previous months.

Species of the month

Pterodactyl (flying reptile)

Pterodactylus antiquus, reconstruction.

Pterodactylus antiquus

Some facts on this reptile:

Body length: 0.75 - 1 m.

Period of existence: 150.8 – 148.5 Million years ago.

Range: Fossils found in France, England, Germany, and Tanzania.

Diet: Mainly fish; small animals.

First described: By the German physician, anatomist, anthropologist, paleontologist and inventor Samuel Thomas von Sömmerring in 1812, who originally named it Ornithocephalus antiquus.


Did you ever see a flying reptile? Probably not, unless you were living 150 milion years ago. You might have seen back then, in the Jurassic epoch, the reptile Pterodactylus antiquus take wing. It had wings formed by a membrane of skin, muscle, and other tissues stretching from the legs to a dramatically lengthened fourth finger. The skull was long with a pointed beak; the bones hollow and air-filled, like the bones of birds. It had nearly 100 teeth and a large crest, curved backward, made of soft tissue. There is a high degree of variance between juveniles and adults, leading to specimens of Pterodactylus often being mistaken for other species. Pterodactylus or "wing finger" is often referred to as a flying dinosaur, but this is incorrect. It is not a dinosaur but belongs to the order Pterosauria or "winged lizards", which are the earliest vertebrates known to have evolved powered flight.

See also: Species of previous months

Wicirywogaeth mewn ieithoedd eraill

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