Realizou o curso de pós-graduação na Escola Superior de Agricultura. “Luiz de Entomologia () e Doutor em Entomologia (), com ênfase ao Manejo. Agrícola na UFCG. Sobre: Livro que trata de aspectos gerais da Entomologia. Arquivado no curso de Engenharia Agrícola na UFCG. Download. Tweet. (ENTOMOLOGIA AGRÍCOLA). pela Comissão Examinadora: \ e. t \ \\–o. Prof. Treinamento Agrícola LTDA nas áreas de biologia de insetos e identificação de artrópodes onde >. Acesso em: 23 abr.
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Entomologiz comparative morphology, embryology,p hysiology, biochemistry and, increasingly, molecular biology of living members of a group provide clues about the evolutionary trends that have occurred within that group.
TheC ollembola, Protura, and Diplura are often placedi nt he taxon Entognatha ta principally because of theu nique arrangement of their mouthparts enclosed withint he ventrolateralextensionsofthehead.
In outlining the pros and cons of these theories it is useful to separate the mono- andd iphyletict heories from thep olyphyletict heory and to present them ina historical context showing the graduald evelopment of evidence in support of one view or the other. The position of the Apostilq is questionable, and the group is probably not monophyletic Bitsch and Bitsch, Arquivos Semelhantes Aspectos gerais sobre siderurgia Aspectos gerais sobre siderurgia, aula 2.
Parte 3 de 7 Somespeciesofchilopods centipedes Figure1. Martins, Damasceno, Apostilaa – Pronto-socorro Pronto-socorro: Trilobites, crustaceans, and eurypterids were abundant at this time.
The Protarthropoda gaverise to the Protrilobita from which thet rilobite—chelicerate line developed and the Protomandibulata Crustacea and Protomyriapoda.
It is believed that the diplosegmental condition enables the animal to exert a strong pushing force withi ts legs while retaining rigidity of the apostjla region.
Even after this time the fossil record is incomplete mainly because conditions were unsuitable for preserving rather delicate organisms such as myriapodsa ndi nsects.
At the base of the legs of symphylans are eversiblev esicles and coxal styli. In thiss cheme the hypothetical ancestral group were the lobopods so-calledb ecause of the lobelike outgrowths of the body wall that served as legs.
However, Bitsch and Bitsch argue stronglyt hat most of these similarities are due to convergence; that is, the Entognatha is not a monophyletic group. agricoa
Indeed,t he extensive cladistic df f Bitsch and Bitsch rejects the monophyly of the Ellipura. A characteristic feature are the large tergal plates on the trunk, which overlap adjacent segments Figure 1.
Similar structures are foundi n some apterygote insects. In a nutshell, proponents of the monophyletic theory simply point to the abundance of features common to arthropods Section 2 and argue that so many similarities could.
Originally, the major drawback to the scheme was a lack of supporting evidence, especially from the fossil record. Space does not permit a detailed account of the early history of monophyletic proposals and readers interested in this should consult Tiegs and Manton Unfortunately, in the case of arthropodst he early fossil recordi s poor.
As their taxonomic status is controversial,t he Protura, Collembola, and Diplura have been included with the thysanurans in Chapter 5 where details of their biology are presented. Collembola haveas ix-segmented abdomen bearing specialized appendages see Chapter 5, Section 2total cleavagei nt he egg, a long composite tibiotarsal? Nevertheless, a few very earlys chemes should be noted to showhowideas changed as new information became available. This does not mean, however, that the problem has been solved!
Evolution is a process ofd ivergence, and yet, paradoxically, organisms may evolve toward as imilar way of life andh ence develop similar structures.
This means that the apterygote insects must have evolved from winged forms, which is contrary to all available evidence. As they cannot escape from would-be predators by speed, many millipedes have evolved such protective mechanisms as the ability to roll into a ball and the secretion of.
Apostila Entomologia resumida
Therefore, arthropod phylogeneticists have had to rely almost entirely on comparative studies. As Mantonp. From the protomyriapods arose the myriapods and hexapods. A distinction must therefore be made between parallel and convergent evolution. Itw ill be readily apparent thatav agrivola of schemes have been devised to show the possible relationships of the hexapod groups Figure 1.
Entomology (Gillott, ) – Livro que trata de aspectos gerais da Entomologia
In determining the evolutionary relationships of animals zoologists use evidence from av ariety of sources. Some authors have suggested thatthearthropodsaremonophyletic,thatis,haveacommonancestor;othershaveproposed thatthegroupisdiphyletic twomajorsubgroupsevolvedfromacommonancestor ,andyet others believe that each major subgroup evolved independently of the others a polyphyletic origin.
Within the last 50 years, much entommologia has been accumulated in the areas of functional morphology and comparative embryology but especially inp aleontology and molecular biology, whichh as been broughtt o bear on the matter of arthropod phylogeny. The earliest known fossil centipedes, from the Upper Silurian, are remarkablys imilar to some extant species, suggesting that the group may be considerably more ancient.
From the protonychophorans developed, on the one hand, the Onychophora and,o nt heo ther, the Protarthropoda inw hich the cuticle became sclerotized and thickened. The symphylan and insectan heads have an identical number of segments and, according to some zoologists, the mouthparts of symphylans are insectan inc haracter.
It is, however, only the fossil record that can provide the direct evidence for such processes. After recognizing that Peripatus Onychophora hadanumberofarthropodanfeatures includingatrachealsystem ,Moseley envisageditasbeingtheancestoroftheTracheata,withtheCrustaceahavingevolved independently.
The distinguishing feature of the almost 10,0 species in the class is the presence of diplosegments, each bearing two pairs of legs, formed by fusion of two originally separate somites. Their problem then becomes one of determining the relative importance of similarities and differences that exist between organisms and whether apparently identical, sharedcharactersarehomologous synapomorphic oranalogous seeChapter 4,Section3.
Such organisms livedi ns hallow water near thes hore or int he littoral zone. Pauropoda species are minute arthropods 0. This proposal may be somewhat close to reality as there isn ow fossil evidence that early insects had appendages with side branches, comparablet ot hose crustaceans, andf urther, the ancestrali nsect leg included 1 segments Kukalova-Peck,andi nE dgecombe, On the contrary,t here are quite divergent views with respect to the relationships of the various arthropod groups Figure 1.
Despite these similarities, theC ollembolaa nd Protura are quite distinct bothf rom each other andf rom other hexapods. At about the same time, after the realization that Limulus is an aquatic arachnid, not a crustacean, it was proposed that the aquatic Eurypterida were the ancestors of all terrestrial arachnids.
Schemes for the possible monophyletico rigino f the arthropods as proposedb y SnodgrassSharovand Boudreaux