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One famous alleged dinobird link was mononykus, claimed to be a flightless bird, the April 1996 cover of Time Magazine even illustrated it with feathers, even though the slightest trace of feathers had not been found. Later evidence indicated that mononykus was clearly not a bird.
There are two competing theories regarding Mononykus.
1) It is theropod dinosaur. There are many examples of theropod dinosaurs skeletons with feathers.
2) It is not a true theropod dinosaur but a related species. In fact, a flightless bird. Unlike other theropods, Mononynkus had a keeled breastbone like a chicken. It also had fused wristbones as do modern birds.
Please detail the source of this ‘later evidence’ that indicates that it ‘was clearly not a bird.’ If you cannot do this then you are either misinformed or lying.
Assuming though, you are correct, (there’s a first time for everything), and there is evidence to show that it is a true theropod and not a bird, then Mononykus was almost certainly feathered.
Neither classification negates the fact that Mononykus has characteristics of both birds and dinosaurs. ie. It has transitional elements and is just one more piece in the damning evidence for evolution and against creation.
I find it odd that you should be promoting evolution in this way but thanks all the same.
Science lesson. It’s a bit dull at first but gets more interesting so please keep reading.
There is a sub-group, (or clade), of reptiles called Dinosaurmorpha.
Dinosaurmorpha is divided into 3 further clade, one of which is called Dinosauriformes.
Dinosauriformes are subdivided into 5 clade. One is called Dinosauria.
Dinosauria are the true dinosaurs and are split further into two more subgroups, (called orders), Ornithischia and Saurischia.
There are two basic types of Saurischia; Sauropods and Theropods. Sauropods are the big long necked veggie dinosaurs like Diplodocus, and Theropods are the bipedal, mainly carnivorous dinosaurs.
Theropods are once again subdivided into Carnosaurs and Coelurosaurs, such as T Rex and Velociraptor.
So far, fossils of 34 separate species of Coelurosaurs have been found to have feathers including Velociraptor. And although not proven beyond doubt, there is strong evidence to suggest that even T Rex was feathered.
Despite Coelurosaurs not being birds, the vast majority of them resemble ancient birds more than they do their Carnosaur cousins in the following 19 ways…
1) They have hollow, thin-walled bones.
2) Their clavicles (collarbones) are fused to form a wishbone.
3) Five or more of their vertebrae are incorporated into the sacrum (hip).
4) The pubis (one of the three bones making up the vertebrate pelvis) is shifted from an anterior to a more posterior orientation and bears a small distal “boot”.
5) Their scapula, (shoulder blades) are straplike.
6) They have large orbits (eye openings in the skull).
7) They have S-shaped curved necks.
8) Most have elongated arms and forelimbs and clawed hands.
9) They have flexible wrists with a semi-lunate carpal (wrist bone).
10) They have 3-fingered opposable grasping hands and 4-toed feet; but supported by 3 main toes.
11) They have reduced, posteriorly stiffened tails.
12) They have elongated metatarsals (bones of the feet between the ankle and toes).
13) They have an erect, digitgrade (ankle held well off the ground) stance with feet postitioned directly below the body.
14) Their eggshell microstructure resembles bird not lizard eggs.
15) They have teeth with a constriction between the root and the crown.
16) They have a functional basis for wing power stroke present in arms and pectoral girdle.
17) They have expanded pneumatic sinuses in the skull.
18) Their ankle joints are hingelike, with movement mostly restricted to the fore-aft plane.
19) They have a secondary bony palate (nostrils open posteriorly in throat).
If one were to count the feathers as well, this would make 20 features of Coelurosaurs that one could argue as being transitional between other reptiles and birds.
This is real science, not the un-sourced nonsense at the top of this post.
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