Nematology, Advances and Perspectives

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The hoopoe (a bird), Upupa epops, is euphoniously named for its call. About 800 species in 41 families, the largest being the Actiniidae. (e.g., Actinia, Adamsia, Aiptasia, Alicia, Anthopleura, Anthothoe, Bartholo- mea, Bunodactis, Calliactis, Condylanthus, Diadumene, Ed- wardsia, Epiactis, Halcampa, Haliplanella, Heteractis (= Radi- anthus), Liponema, Metridium, Peachia, Phyllodiscus, Ptychodactis, Stichodactyla, Stomphia, Triactis) ORDER SCLERACTINIA (= MADREPORARIA): True or stony corals.

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The Marine Mollusca of the Maltese Islands: Neotaenioglossa

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Journal of Animal Ecology, 80(3), 603-614. doi: 10.1111/j.1365-2656.2011.01807.x Magbanua, F. Although a few rotifers are sessile, most are motile and quite active, moving about by swimming or inch- worm-like creeping. ILR signaling also contributes to physiological resistance against diverse stressors including heavy metals, hypoxia [ 93 ], and so forth. Mem. 329. [no longer useful for genera but still very useful for species concepts and circumscriptions] Lafontaine, J.

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Reproduction of Marine Invertebrates

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Nervous System and Sense Organs The cerebral ganglion of rotifers is located dorsal to the mastax, in the neck region of the body. Arthropods have an open circulatory system in which hemolymph fluid is propelled by a heart through short arteries into sinuses (the hemocoel) surrounding tissues and organs. Suspend- ed particles contact and adhere to the surface and then are moved to the mouth by ciliary tracts (as in crinoids), setal brushes (as in certain crustaceans), or by some other means of transport.

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Leech (Reaktion Books - Animal)

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Probably all nemerteans respond to contact with chemical stimuli, and many are capable of distance chemoreception of ma- terials in solution. This site uses cookies to improve performance. Evolution within the Porifera Sponges are such an ancient and enigmatic phylum that their phylogeny has largely eluded biologists. Salt water contains higher levels than freshwater. These deposited embryos may be aban- doned or, as is the case in stomatopods, carefully tended by the female.

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Evolutionary Developmental Biology of Invertebrates 2:

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Their nervous systems are quite complex compared to those of other invertebrate groups, and they have well-developed eyes and good eyesight. In Limulus, en- zymes are produced by the midgut wall and secreted into the lumen. OK, granted they are probably not as colorful or attractive as many of the animals that we find on coral reefs, and to most people they do look pretty much like a worm. This phylum appeared in the early Cambrian period and contains about 7,000 living species and 13,000 extinct ones.

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Microscopic Anatomy of Invertebrates. Volume 2: Placozoa,

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Symbiosis of algae and invertebrates: Aspects of the symbiont surface and the host–symbiont interface. Ancient Invertebrates and Their Living Relatives. Blackwell, London. [A good distillation of fossil in- vertebrate zoology.] Briggs, D. National Museum in 1896, and from then until 1922 published 80 papers mostly on isopods. Given questions within the presentation, the students will correctly answer 70% of the questions.

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Deadliest Animals On The Planet: Deadly Wildlife Animals

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A single claw also occurs in many holometabolous larvae and some ptery- gote adults. The pattern and cell fates in many of these archoö- PHYLUM PLATYHELMINTHES 305 Figure 10.23 Mating and egg laying in turbellarians. (A) Mating, egg cluster, and hatching in a freshwater planarian. (B) Egg laying by the polyclad Stylochus. Members of the order Ctenostomata possess an uncalcified, flexible zoecium composed of gelatinous, chitinous, or leathery material. In anthozoan polyps, the free inner edge of each mesentery below the pharynx has a thickened, cordlike margin armed with cnidae, cilia, and gland cells and is called the mesenterial filament (Figures 8.6 and 8.20).

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Keys to the Trematoda (Cabi)

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Several demosponge genera lack both spongin and a spicule skeleton (e.g., Chondrosia, Eu- spongia, Halisarca, Oscarella). They are called setae in much of the literature, but the name chaetae is now preferred to emphasize their homology within these groups and to distinguish them from setae such as those found in arthropods. Males bend the anterior body segments back under the trunk until the penes and gonopods make contact, whereupon the later picks up a spermato- phore in preparation for mating.

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Cladocera as Model Organisms in Biology: Proceedings of the

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Examine pond water and yeast cells under a microscope, dissect an oyster, sing "The Six Kingdom" song, eat 5 of the kingdoms on a supreme pizza, and more! Besides being an appeal to faith rather than an inference from science, the “hard part hypothesis” requires multiple mathematical miracles for the repeated origin of gene sets for hard parts by time-and-chance in different lines. Conver- gence can be discovered only by careful comparative embryological or anatomical studies, sometimes requir- ing the efforts of several generations of specialists.

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New Zealand Inventory of Biodiversity: Vol. 3: Kingdoms

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We begin below with a general case, using the Chinese liver fluke Opisthorchis sinensis as an example. The inner ends of the canals are surrounded by nervous tissue of the cerebral gan- glion, and by glandular tissue, and they are often inti- mately associated with lacunar blood spaces. However, many eucestodes are known to self-fertilize. The American land and freshwater isopod Crustacea. Thus the lophophore can be protruded out from between the mantle lobes and func- tion to propel and feed the larva.

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