Browse Category by Invertebrates
Invertebrates

Trophic and Guild Interactions in Biological Control

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Others are capable of asexual reproduction, or sometimes, both methods of reproduction. The orders Doliolida and Salpida include thaliaceans that alternate between solitary sexual forms and colo- nial asexual stages (Figure 23.14C–E). Anthozoan cnidae lack a cnidocil and have a tripartite apical flap instead of an operculum. Rev. 14(2): 170–175. von Frisch, K. 1967. Comparative biology of marsupial development in Leptomysis and other Mediterranean Mysidacea (Crustacea).

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Invertebrates

Nectaries and Nectar

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SUPERORDER EULAMELLIBRANCHIA (= HETERODON- TA): Ctenidia with outer fold completely connected dor- sally to roof of mantle cavity, with adjacent filaments at- tached by tissue bridges; shell generally aragonitic, without nacreous layer; shell valves equal to subequal, with a few large cardinal teeth separated from the elon- gated lateral teeth by a toothless space; mantle more or less fused posteroventrally and forming incurrent and ex- current apertures that are frequently drawn out onto siphons; foot usually lacks byssal threads in adult.

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Invertebrates

Mechanisms and Deployment of Resistance in Trees to Insects

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Invertebrate Non-Column: Sea cucumbers - Part II. in Advanced Aquarists Online Magazine. How organisms use flow-induced pressures. A four-taxon data set has 15 possi- ble bifurcating trees, a five-taxon data set has 105 possible trees, and so on. The pharynx empties into an esophagus, which in turn opens into a large intestine (midgut), where digestion and absorption take place. Although the core of these holdings are collections acquired by The Field Museum from the 1893 Columbian Exposition, additions have come via collecting efforts with primary focus on other groups and the deposit of voucher material.

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Invertebrates

Sketches of Butte: (From Vigilante Days to Prohibition)

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Here is a list of the top ten startlingly large invertebrates in the world. Roundworms are pseudocoelomate having a body cavity that is not completely lined. An obvious point in favor of this general idea is that entero- coely does occur in many living animals, thus retaining the hypothetical ancestral process. In addition to the marine invertebrates, the Blaschkas were also commissioned to make model flowers, which are now housed at Harvard University. Female strepsipterans release several thousand tiny larvae that escape from their mother (and from the host’s body, in the parasitic species) to invade the soil and vegetation.

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Invertebrates

Palæontology--Invertebrate

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Studien üuber den Körperbau der Anneliden. The coordination of these waves is apparently due largely to hydrodynamic effects gener- ated as each cilium moves. Small crustaceans exchange gases across thin areas of the cuticle, but larger species have gills. The cnidarian body consists of a central blind sac, the coelenteron (= gastrovascular cavity), enclosed by a body wall comprising two epithelia, the outer epidermis and the inner gastrodermis (Fig 7-1, 7-2*).

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Invertebrates

Handbook of Invertebrate Zoology. For Laboratories and

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Multicullular body is provided with many pores or Ostia. Iodamoeba buetschlii infects humans, other primates, and pigs. Without your support, many of these specimens will deteriorate in storage. Wilson, fount of quotable insect statistics, has informed us that in the Amazon rain forest ants make up more than four times the biomass of all the land vertebrates combined; that the world’s smallest ant forms a colony that could comfortably dwell inside the brain case of the world’s largest ant; and that the biomass of all the social insects combined (ants, termites, and social wasps and bees) makes up about 80 percent of Earth’s total biomass.

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Invertebrates

Classical Biological Control of Bemisia tabaci in the United

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Classification is simply a way to put an order to God's creation. Time for evolutionary biologists to take more inter- est in protist phylogenetics? Were this shown to be true, characters (1) and (2) on the cladogram (Figure 13.40A) would drop down PHYLUM ANNELIDA 439 Clitellata 2 3 1 4 5 6 7 8 9 10 11 12 13 (A) Polychaeta Oligochaeta Hirudinoidea Polychaeta Oligochaeta Hirudinoidea Arthropods (and their kin) Metameric ancestor Coelomate, protostome ancestor (B) Clitellata Figure 13.40 Proposed cladogram (A) and evolutionary tree (B) depicting the evolution of annelids.

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Invertebrates

Handbook of Genetics: Volume 1 Bacteria, Bacteriophages, and

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They are not homologous with the Malpighian tubules of insects or myriapods, which arise from the hindgut and are thus of ectodermal origin. The sexes are usually separate, although PHYLUM ARTHROPODA: THE CRUSTACEA 63UNCORRECTED PAGE PROOFS hermaphroditism is the rule in remipedes, cephalo- carids, most cirripedes, and a few decapods. Morris et al. (eds.), The Origins and Relationships of Lower Invertebrates. The closure muscle in the dimorphic claws of male fiddler crabs.

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Invertebrates

Frogs and Toads of the World

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Excretory Malpighian tubules extract wastes from the hemocoel and empty them into the gut. escape of gametes to the outside; they are, in fact, con- sidered homologous to the reproductive ducts of many invertebrates. In fact, because of their taxonomic diversity and numerical abundance, it is often said that crustaceans are the “insects of the sea.” We prefer to think of insects as “crustaceans of the land.” Despite the enormous morphological diversity seen among crustaceans (Figures 16.1 to 16.20), they display a suite of fundamental unifying features (Box 16A).

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Invertebrates

The Butterflies and Moths of Hampshire and the Isle of

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However, much of my current research focuses on the processes that influence dispersal and recruitment in coastal marine invertebrates, and I am particularly interested in the evolutionary consequences of larval developmental modes among marine invertebrates. Mystacocarids are thought to feed by scraping organic material from the surfaces of sand grains with their setose mouthparts. The larvae eat the roots of palo verde trees in the Sonoran Desert.

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