Home Physical • Download e-book for iPad: Fins into limbs : evolution, development, and transformation by Brian K. Hall

Download e-book for iPad: Fins into limbs : evolution, development, and transformation by Brian K. Hall

By Brian K. Hall

ISBN-10: 0226313360

ISBN-13: 9780226313368

ISBN-10: 0226313379

ISBN-13: 9780226313375

ISBN-10: 0226313409

ISBN-13: 9780226313405

Long in the past, fish fins developed into the limbs of land vertebrates and tetrapods. in this transition, a few components of the fin have been carried over whereas new beneficial properties built. Lizard limbs, poultry wings, and human legs and arms are accordingly all evolutionary changes of the unique tetrapod limb. 

A entire examine the present kingdom of analysis on fin and limb evolution and improvement, this quantity addresses a variety of subjects—including development, constitution, upkeep, functionality, and regeneration. Divided into sections on evolution, improvement, and adjustments, the ebook starts with a historic advent to the examine of fins and limbs and is going directly to contemplate the evolution of limbs into wings in addition to variations linked to really expert modes of existence, resembling digging and burrowing. Fins into Limbs additionally discusses events while evolution looks to were reversed—in whales, for instance, whose entrance limbs turned flippers after they reverted to the water—as good as situations during which limbs are misplaced, equivalent to in snakes.

With contributions from world-renowned researchers, Fins into Limbs may be a font for additional investigations within the altering box of evolutionary developmental biology.

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Read e-book online Fins into limbs : evolution, development, and transformation PDF

In the past, fish fins developed into the limbs of land vertebrates and tetrapods. in this transition, a few parts of the fin have been carried over whereas new beneficial properties built. Lizard limbs, poultry wings, and human legs and arms are hence all evolutionary variations of the unique tetrapod limb. A complete examine the present country of analysis on fin and limb evolution and improvement, this quantity addresses quite a lot of subjects—including development, constitution, upkeep, functionality, and regeneration.

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Extra resources for Fins into limbs : evolution, development, and transformation

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The supraglenoid foramen lies inside the triangular supraglenoid area delimited anteriorly by the thick ridge of the supraglenoid buttress. The infraglenoid buttress is well developed. A broad subscapular fossa with prominent dorsal scarring along its dorsal edge is visible medially. Colosteids Colosteids range from the late Viséan to the late Moscovian (330–300 mya) of the Carboniferous, and are recorded in both Great Britain and North America. The best-known representative is the superficially crocodile-like genus Greererpeton, with an elongate skull, long trunk, and small limbs (Smithson 1982; S.

D) Pelvic girdle in left lateral view (reversed from Godfrey 1989, fig. 22a). (E) Left pelvic limb with reconstructed pes (combined from Godfrey 1989, figs. 24o, 25b, n, 26b). stout neck and two processes. As in Acanthostega, several obturator foramina are present in the anterior half of the puboischiadic plate. The acetabulum, however, has a completely finished rim, as in colosteids and higher taxa. The hindlimb has femur of comparable size to humerus (fig. 13D). The ventral surface has a prominent adductor crest or ridge, but the extensive blade described in Acanthostega (Coates 1996) and colosteids (S.

In anterior aspect, a slanting, short deltopectoral crest lies considerably below the level of the radial facet. The posterior edge of the humerus bears a small acuminate process (Coates’s [1996] “process 2”), and the proximal edge of the subrectangular entepicondyle forms a slightly obtuse angle with the long axis of the humeral shaft (such as it is). A distinct trough finished with periosteal bone separates radial and ulnar facets. The ectepicondyle, again like that of Panderichthys, consists of a proximodistally elongate ridge, but in Acanthostega this projects above and beyond the dorsal rim of the ulnar facet.

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Fins into limbs : evolution, development, and transformation by Brian K. Hall


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