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Arms and hands. The arms are quite long (about 70% of the length of the legs). The hands are in Java Paint ANSI/AIM Code 39 in Java Arms and hands. The arms are quite long (about 70% of the length of the legs). The hands are




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Arms and hands. The arms are quite long (about 70% of the length of the legs). The hands are using barcode maker for visual studio .net control to generate, create qr code image in visual studio .net applications. 2/5 Industrial about as large as the feet, Quick Response Code for .NET and each hand bears three, fully moveable, separate ngers. Each nger is tipped with a well-developed, recurved claw.

The wrist of Archaeopteryx bears a semi-lunate carpal (Figure 10.5e; see 9)..

Legs and feet. The foot of Archaeopteryx has three toes in front, and a fourth toe lies to the side (or behind; the specim Denso QR Bar Code for .NET ens are attened). The three in front are more or less symmetrical around digit III, and all the toes all have well-developed claws (Figure 10.

5d). The ankle of Archaeopteryx is a modi ed mesotarsal joint (see 4). It preserves a small splint of bone rising up from the center of astragalus, one of two bones in the ankle (see Figure 4.

5), to form a tall ascending process. The three foot bones are unfused. The thighs are considerably shorter than the shins, and the bula is sliver-like as it approaches the ankle.

. 3. Darwin had just publishe d On the Origin of Species in 1859, proposing that species evolved into other species. Here, a mere two years later, was discovered an apparent missing link that mixed reptilian and avian features.

. Archaeopteryx and the ancestry of living birds 219 Figure 10.4. The beautifull y preserved, complete Berlin specimen of Archaeopteryx.

(a) Main slab preserving most of specimen; (b) counterslab, preserving opposite side of specimen, primarily impressions. Note the exquisite feather impressions radiating out from the wings and tail..

Long bones. Archaeopteryx h .net framework QR Code 2d barcode as thin-walled long bones with large hollow spaces.

Trunk and tail. The axial skeleton of Archaeopteryx lacks many of the highly evolved features that characterize modern birds. The body is relatively long and shows none of the foreshortening or fusion that one sees in the vertebrae of birds.

The sternum is relatively small, with a small keel. A large, strong furcula is present (Figure 10.5f).

Also present are gastralia, or belly ribs, which primitively line the belly in many archosaurs (Figure 10.5c). Archaeopteryx lacks a synsacrum and instead has a primitive, unfused archosaurian pelvis.

The pubis is directed downward. The distal end of the pubis (the footplate) is well developed, although the front part is absent. Archaeopteryx has a long, straight, well-developed tail.

Projections from the neural arches (zygapophyses) are elongate, meaning that the tail has little exibility and has little potential for movement along its length. Feathers. Archaeopteryx has well-preserved, unambiguous feather impressions.

The best-preserved feathers are clearly ight feathers (Figure 10.5b) and are indistinguishable from those of modern birds. Unlike in living birds, however, there are feathers also lining a long, bony tail.

These radiate out from the vertebrae, and form an impressive tail plume.. Archaeopteryx as a bird Archaeopteryx was immediate .NET qr-codes ly recognized as a fossil of the most primitive bird known. The feathers identi ed it as a bird, as indeed many other features, particularly the stance, legs and feet, were remarkably bird-like, and, together with living birds, Archaeopteryx forms a monophyletic Avialae (Figure 10.

6). But where did Archaeopteryx come from . 220 Theropoda II (f ). I II III Sc Ra Ul Archaeopteryx and the ancestry of living birds 221 Figure 10.5. A reconstructi QR Code for .

NET on of Archaeopteryx, surrounded by photographs taken from the actual specimens. (a) Skull, seen from right side, note teeth; (b) feather impressions showing vanes and shaft superbly preserved; (c) trunk region seen from left side, note gastralia; (d) foot (four-toed and clawed, with symmetry around digit III; digit I opposite digits II, III, and IV); (e) right hand and wrist with clawed digits (in ascending order, I, II, and III). Inset: drawing of left wrist, showing semi-lunate carpal (Ra, radius; Ul, ulna; Sc, semi-lunate carpal); (f ) robust theropod furcula.

. 222 Theropoda II Table 10.3. Distribution of qr codes for .

NET characters among maniraptoran theropods, Archaeopteryx, and modern birds Archaeopteryx Maniraptoran theropods Modern birds. Teeth ( ) Braincase slightl y enlarged Tail long, well-developed Hand three- ngered; I, II, III Legs: 1. Bipedal 2. Unfused foot Foot: 1.

3 toes in front; 1 in back 2. Digit V ( ) 3. Claws Hollow bones Furcula (wishbone) Trunk not rigid 1.

Sternum small; at 2. Pelvis unfused 3. All vertebrae ( ) 4.

Flight adaptions ( ) Feathers ( ) Teeth ( ) Braincase slightly enlarged Tail long, well-developed Hand three- ngered; I, II, & III Legs: 1. Bipedal 2. Unfused foot Foot: 1.

3 toes in front; 1 in back 2. Digit V ( ) 3. Claws Hollow bones Furcula (wishbone) Trunk not rigid 1.

Sternum small; at 2. Pelvis unfused 3. All vertebrae ( ) 4.

Partial ight adaptations Feathers ( ) Teeth ( ) Swollen braincase Pygostyle ( ) Carpometacarpus ( ); fused digits I, II, III Legs: 1. Bipedal 2. Tarsometatarsus Foot: 1.

3 toes in front; 1 in back 2. Digit V ( ) 3. Claws Pneumatic bones Furcula (wishbone) Rigidi ed trunk 1.

Carinate sternum 2. Synsacrum 3. Some vertebrae ( ) 4.

Flight adaptations Feathers ( ).
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