Cruralispennia

Din no ase: “leg feather”1

Ɔdii: NamNnomaa a wɔdii kanKretasias Mfiase

Cruralispennia was a tiny, feathered bird that lived about 131 million years ago in what is now China. It had strange, wiry feathers on its legs that no other bird had before or since!1

Ɔtenaa ase

mfeɛ ɔpepem 133 kɔsi 126 a atwam4

Kretasias Mfiase

Wɔhunuu fɔsil wɔ

Sichakou Basin, Fengning County, Hebei Province, northeastern China1

Ntɛmntɛm a ɛsen biara

bɛyɛ 27 km/h (17 mph)

Wimtuo, nsusuiɛ

Berɛ bɛn na ɛtenaa ase?

Triasik

Jurasik

Kretasias

mfeɛ ɔpepem 252 a atwam20114566, ɔsoro ɛboɔ no

Na ɛyɛ ntɛm sɛn?

Onipa a ɔnante bɛyɛ 5 km/h (3 mph)

Abofra a ɔte sakre so bɛyɛ 12 km/h (7 mph)

Cruralispennia bɛyɛ 27 km/h (17 mph)

Ɔpɔnkɔ a ɔretu mmirika bɛyɛ 65 km/h (40 mph)

Kyiita bɛyɛ 100 km/h (62 mph)

nneɛma a ɛyɛ fɛ

Nsɛm a ɛyɛ anigye

Cruralispennia had a plough-shaped pygostyle, a fused tail bone that was thought to only exist in more advanced birds. This shows that different bird groups evolved similar features separately.1

Its leg feathers were unlike any seen before: the base was like a stiff wire, and the tip was fluffy and split into many tiny strands.1

Even though Cruralispennia lived very early in bird history, its shoulder bone (coracoid) was already very slender, a shape usually found in later Cretaceous birds.1

The name Cruralispennia means 'leg feather' in Latin, because of the unusual feathers on its shin bone (tibiotarsus).1

This bird had 14 teeth in its lower jaw, which is why its full species name is multidonta, meaning 'many teeth'.1

Cruralispennia lived alongside other early birds like Protopteryx and Eoconfuciusornis in the same ancient lake environment.1

Yei yɛ Cruralispennia mfonini a AI yɛeɛ, sɛdeɛ ebia na ɔteɛ. Kɔmputa na ɛyɛeɛ firi deɛ nyansahufoɔ nim mu. Ɛyɛ nsusuiɛ: ebia na aboa ankasa no nte saa, na obiara nnim ne kɔla ankasa.

wobisaeɛ

Nsɛm a wɔbisa bebree fa Cruralispennia ho

?How big was Cruralispennia?

Cruralispennia was a tiny bird, about the size of a modern sparrow. Its leg feathers were only 12 to 16 mm long.2 3

?Where did Cruralispennia live?

It lived in what is now China, around a lake in the Sichakou Basin about 131 million years ago.2

?What did Cruralispennia eat?

Scientists think Cruralispennia likely ate insects or small prey, because it had sharp, curved claws and many teeth in its lower jaw.2 3

Ma dino ho animdefoɔ

Nyansahu din: Cruralispennia
Obi a ɔtoo din: Wang et al. 20174
Kuo: Nnomaa a wɔdii kan
Abusua / kuo kɛseɛ: Enantiornithes4
Nkyekyɛmu: Theropoda > Avialae4
Abotan no mfeɛ: mfeɛ ɔpepem 133 kɔsi 126 (Hauterivian)4
Abotan nhyehyɛeɛ: Huajiying4
Aman: Kyaena4
Fɔsil nkyerɛwee: 1 wɔ The Paleobiology Database mu4
Nhunumu: Cruralispennia was named in 2017 by Min Wang and colleagues from a nearly complete skeleton found in the Huajiying Formation of China.4 1
Wɔda so gye ho akyinnye: Scientists are not sure what the strange leg feathers were used for. They might have helped with display, insulation, or even sensing the environment.1

Baabi a nsɛm no firi

npg.nature.com (npg.nature.com)
Cruralispennia (en.wikipedia.org)
A bizarre Early Cretaceous enantiornithine bird with unique crural feathers and an ornithuromorph plough-shaped pygostyle | Nature Communications (nature.com)
Cruralispennia in The Paleobiology Database (CC BY 4.0): mfeɛ, mmeaeɛ, abotan nhyehyɛeɛ, nkyekyɛmu.

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