-
Smithsonian Institution, National Museum of Natural History, Department of Entomology
NMNH Entomology
Type specimen, 2 workers 1 male, co-type, labels
-
Smithsonian Institution, National Museum of Natural History, Department of Entomology
NMNH Entomology
Type specimen, 3 workers, co-type, labels
-
Smithsonian Institution, National Museum of Natural History, Department of Entomology
NMNH Entomology
Type specimen, 2 workers 1 male, co-type, pin
-
Smithsonian Institution, National Museum of Natural History, Department of Entomology
NMNH Entomology
Type specimen, 3 workers, co-type, pin
-
Smithsonian Institution, National Museum of Natural History, Department of Entomology
NMNH Entomology
Type specimen, 2 workers 1 male, co-type, bottom ant, male, profile
-
Smithsonian Institution, National Museum of Natural History, Department of Entomology
NMNH Entomology
Type specimen, 3 workers, co-type, soldier, bottom ant, dorsal
-
Smithsonian Institution, National Museum of Natural History, Department of Entomology
NMNH Entomology
Type specimen, 2 workers 1 male, co-type, bottom ant, male, dorsal
-
Smithsonian Institution, National Museum of Natural History, Department of Entomology
NMNH Entomology
Type specimen, 3 workers, co-type, soldier, bottom ant, head
-
Smithsonian Institution, National Museum of Natural History, Department of Entomology
NMNH Entomology
Type specimen, 2 workers 1 male, co-type, bottom ant, male, head
-
Smithsonian Institution, National Museum of Natural History, Department of Entomology
NMNH Entomology
Type specimen, 3 workers, co-type, soldier, bottom ant, profile
-
Smithsonian Institution, National Museum of Natural History, Department of Entomology
NMNH Entomology
Type specimen, 2 workers 1 male, co-type, bottom ant, male, profile
-
Smithsonian Institution, National Museum of Natural History, Department of Entomology
NMNH Entomology
Type specimen, 3 workers, co-type, worker, minimum, top ant, dorsal
-
Smithsonian Institution, National Museum of Natural History, Department of Entomology
NMNH Entomology
Type specimen, 2 workers 1 male, co-type, soldier, middle ant, dorsal
-
Smithsonian Institution, National Museum of Natural History, Department of Entomology
NMNH Entomology
Type specimen, 3 workers, co-type, worker, minimum, top ant, head
-
Smithsonian Institution, National Museum of Natural History, Department of Entomology
NMNH Entomology
Type specimen, 2 workers 1 male, co-type, soldier, middle ant, head
-
Smithsonian Institution, National Museum of Natural History, Department of Entomology
NMNH Entomology
Type specimen, 3 workers, co-type, worker, minimum, top ant, profile
-
Smithsonian Institution, National Museum of Natural History, Department of Entomology
NMNH Entomology
Type specimen, 2 workers 1 male, co-type, soldier, middle ant, profile
-
Smithsonian Institution, National Museum of Natural History, Department of Entomology
NMNH Entomology
Type specimen, 2 workers 1 male, co-type, worker, top ant, dorsal
-
Smithsonian Institution, National Museum of Natural History, Department of Entomology
NMNH Entomology
Type specimen, 2 workers 1 male, co-type, worker, top ant, head
-
Smithsonian Institution, National Museum of Natural History, Department of Entomology
NMNH Entomology
Type specimen, 2 workers 1 male, co-type, worker, top ant, profile
-
Lateral..
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Summary[
edit] Description: Ant heads in
Pheidologeton diversus. Date: 1927. Source: Wheeler, W.M. (1927): The physiognomy of insects. Quarterly Review of Biology 2: 1-36.
PDF. Author: W M Wheeler. Permission(
Reusing this file): pd-old.
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Identifier: evolutiontheory01weis (
find matches)Title:
The evolution theoryYear:
1904 (
1900s)Authors:
Weismann, August, 1834-1914 Thomson, J. Arthur (John Arthur), 1861-1933 Thomson, Margaret RSubjects:
EvolutionPublisher:
London, E. ArnoldContributing Library:
NCSU LibrariesDigitizing Sponsor:
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view book online to see this illustration in context in a browseable online version of this book.Text Appearing Before Image:s of other parts musthave taken place sinmltaneously, if the primary variation was to beof use, and not to lead to the destruction of its possessor. Here againwe have a proof that the co-adaptation of many parts can take place TRANSMISSIBILITY OF FUNCTIONAL MODIFICATIONS 97 without any intervention of the Lamarckian principle, and that theremust be some other factor which brings this about. Where, then, shall we look for this other factor, if not in theprocesses of selection, in the selecting of the most suitable variationsamono; all those which occur ? We are confronted with the alternativeof either working out a sufficient explanation with this factor, or ofgiving up the attempt at explanation altogether. Yet the applicationof the principle of selection in relation to the neuters of colony-forming insects is by no means simple, for, as the workers aresterile, a modification of them through processes of breeding cannotbegin directly with themselves. The workers which exhibit the mostText Appearing After Image:Yi.r. 106. Three workers of the same species of Indian Ant (Pheidologctondiversus), dmwn from specimens supplied by Prof. August Forel. A, the largest,B, the intermediate, C, the smallest form. suitable variations cannot be selected for breeding, but only tlieirparents, the sexual animals, and these according to whether theyproduce better workers or worse. This is how Darwin looked at thematter, and his view receives support from one peculiarity in thecomposition of these animal colonies, whose significance becomesapparent in relation to this problem. It has long been known thatin a bee-hive there are from 10,000 to 20,000 workers, but only onetrue female, the so-called queen, and the meaning of this remarkablearrangement probably is, that the adaptation of the workers throughnatural selection becomes much more easily possible, dnce the^ wltoleimmher are the children of a single pair. It is not the individual II. H 98 THE EVOLUTION THEORY workers, but the whole colony, that is, the whNote About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.