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Acantholochus
''Acantholochus'' is a genus of parasitic copepods belonging to the family Bomolochidae. Its members can only be distinguished from the closely related genus ''Hamaticolax'' by the absence of an accessory process on the claw of the maxillipeds. Species It includes the following species: The following species were formerly included in ''Acantholochus'' but are now placed in ''Hamaticolax'': *''Hamaticolax galeichthyos'' (Luque Luque () is a city in Central Department of Paraguay, part of the Gran Asunción metropolitan area. Both 1635 and 1750 have been recorded as dates of its founding. It was temporarily the capital of Paraguay in 1868 during the Paraguayan War be ... & Bruno, 1990) *''Hamaticolax paralabracis'' (Luque & Bruno, 1990) *''Hamaticolax unisagittatus'' (Tavares & Luque, 2003) References Poecilostomatoida {{copepod-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hamaticolax
''Hamaticolax'' is a genus of parasitic copepods belonging to the family Bomolochidae. Its members can only be distinguished from the closely related genus ''Acantholochus'' by the presence of an accessory process on the claw of the maxillipeds. It includes the following species: *''Hamaticolax attenuatus'' (C. B. Wilson, 1913) *''Hamaticolax embiotocae'' (Hanan, 1976) *''Hamaticolax galeichthyos'' (Luque & Bruno, 1990) *''Hamaticolax maleus'' (Oldewage, 1994) *''Hamaticolax occultus'' (Kabata, 1971) *''Hamaticolax paralabracis'' (Luque & Bruno, 1990) *''Hamaticolax prolixus'' (Cressey, 1969) *''Hamaticolax scutigerulus'' (C. B. Wilson, 1935) *''Hamaticolax spinulus'' (Cressey, 1969) *''Hamaticolax unisagittatus'' (Tavares & Luque, 2003) References Poecilostomatoida {{copepod-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bomolochidae
Bomolochidae is a family (biology), family of copepods parasitic on marine fishes. Most species parasitize the gills of fish, but some species live in the nostrils or on the eyes of their hosts. The family contains just over 150 species from the following genera: *''Acanthocolax'' Vervoort, 1969 *''Acantholochus'' Cressey, 1984 *''Bomolochus (copepod), Bomolochus'' Nordmann, 1832 *''Boylea'' Cressey, 1977 *''Ceratocolax'' Vervoort, 1965 *''Cresseyus'' Ho & Lin, 2006 *''Dicrobomolochus'' Vervoort, 1969 *''Hamaticolax'' Ho & Lin, 2006 *''Holobomolochus'' Vervoort, 1969 *''Holocolax'' Cressey, 1982 *''Megacolax'' Izawa, 2021 *''Naricolax'' Ho, Do & Kasahara, 1983 *''Neobomolochus'' Cressey, 1981 *''Nothobomolochus'' Vervoort, 1962 *''Orbitacolax'' Shen, 1957 *''Paraorbitacolax'' Izawa, 2021 *''Pseudoeucanthus'' Brian, 1906 *''Pseudorbitacolax'' Pillai, 1971 *''Pumiliopes'' Shen, 1957 *''Pumiliopsis'' Pillai, 1967 *''Tegobomolochus'' Izawa, 1976 *''Triceracolax'' Izawa, 2021 *''Unico ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal
Animals are multicellular, eukaryotic organisms in the Kingdom (biology), biological kingdom Animalia. With few exceptions, animals Heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, are Motility, able to move, can Sexual reproduction, reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of Cell (biology), cells, the blastula, during Embryogenesis, embryonic development. Over 1.5 million Extant taxon, living animal species have been Species description, described—of which around 1 million are Insecta, insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have Ecology, complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a Symmetry in biology#Bilate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthropod
Arthropods (, (gen. ποδός)) are invertebrate animals with an exoskeleton, a Segmentation (biology), segmented body, and paired jointed appendages. Arthropods form the phylum Arthropoda. They are distinguished by their jointed limbs and Arthropod cuticle, cuticle made of chitin, often Mineralization (biology), mineralised with calcium carbonate. The arthropod body plan consists of segments, each with a pair of appendages. Arthropods are bilaterally symmetrical and their body possesses an exoskeleton, external skeleton. In order to keep growing, they must go through stages of moulting, a process by which they shed their exoskeleton to reveal a new one. Some species have wings. They are an extremely diverse group, with up to 10 million species. The haemocoel, an arthropod's internal cavity, through which its haemolymph – analogue of blood – circulates, accommodates its interior Organ (anatomy), organs; it has an open circulatory system. Like their exteriors, the internal or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crustacean
Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group can be treated as a subphylum under the clade Mandibulata. It is now well accepted that the hexapods emerged deep in the Crustacean group, with the completed group referred to as Pancrustacea. Some crustaceans (Remipedia, Cephalocarida, Branchiopoda) are more closely related to insects and the other hexapods than they are to certain other crustaceans. The 67,000 described species range in size from '' Stygotantulus stocki'' at , to the Japanese spider crab with a leg span of up to and a mass of . Like other arthropods, crustaceans have an exoskeleton, which they moult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates, by the possession of biramous (two-parted) limbs, and by th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maxillopoda
Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group can be treated as a subphylum under the clade Mandibulata. It is now well accepted that the hexapods emerged deep in the Crustacean group, with the completed group referred to as Pancrustacea. Some crustaceans ( Remipedia, Cephalocarida, Branchiopoda) are more closely related to insects and the other hexapods than they are to certain other crustaceans. The 67,000 described species range in size from '' Stygotantulus stocki'' at , to the Japanese spider crab with a leg span of up to and a mass of . Like other arthropods, crustaceans have an exoskeleton, which they moult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates, by the possession of biramous (two-parted) limbs, and by thei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copepod
Copepods (; meaning "oar-feet") are a group of small crustaceans found in nearly every freshwater and saltwater habitat (ecology), habitat. Some species are planktonic (inhabiting sea waters), some are benthos, benthic (living on the ocean floor), a number of species have parasitic phases, and some continental species may live in limnoterrestrial habitats and other wet terrestrial places, such as swamps, under leaf fall in wet forests, bogs, springs, ephemeral ponds, and puddles, damp moss, or water-filled recesses (phytotelmata) of plants such as bromeliads and pitcher plants. Many live underground in marine and freshwater caves, sinkholes, or stream beds. Copepods are sometimes used as Ecological indicator, biodiversity indicators. As with other crustaceans, copepods have a larval form. For copepods, the egg hatches into a Crustacean larvae#Nauplius, nauplius form, with a head and a tail but no true thorax or abdomen. The larva molts several times until it resembles the adult an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclopoida
The Cyclopoida are an order of small crustaceans from the subclass Copepoda. Like many other copepods, members of Cyclopoida are small, planktonic animals living both in the sea and in freshwater habitats. They are capable of rapid movement. Their larval development is metamorphic, and the embryos are carried in paired or single sacs attached to first abdominal somite. Distinguishing features Cyclopoids are distinguished from other copepods by having first antennae shorter than the length of the head and thorax, and uniramous second antennae. The main joint lies between the fourth and fifth segments of the body. Taxonomy Cyclopoida contains 30 families: * Archinotodelphyidae Lang, 1949 * Ascidicolidae Thorell, 1859 * Botryllophilidae Sars G.O., 1921 * Buproridae Thorell, 1859 * Chitonophilidae Avdeev & Sirenko, 1991 * Chordeumiidae Boxshall, 1988 * Corallovexiidae Stock, 1975 * Cucumaricolidae Bouligand & Delamare-Deboutteville, 1959 * Cyclopettidae Martínez Arbizu, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poecilostomatoida
Poecilostomatoida are an suborder of copepods. Although it was previously considered a separate order, recent research showed it to be nested within the Cyclopoida Description The classification of these copepods has been established on the basis of the structure of the mouth. In poecilostomatoids the mouth is represented by a transverse slit, partially covered by the overhanging labrum which resembles an upper lip. Although there is variability in the form of the mandible among poecilostomatoids, it can be generalized as being falcate (sickle-shaped). The antennules are frequently reduced in size and the antennae modified to terminate in small hooks or claws that are used in attachment to host organisms. Life cycle As with many crustaceans, larval development is metamorphic with immature forms differing greatly from those of adults. Embryos are carried in paired or single sacs attached to first abdominal somite (as seen in the illustration of the female '' Sapphirina darwinii ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roger Cressey (zoologist)
Roger W. Cressey (born August 9, 1965) is a cyber security and counter-terrorism expert and served in senior positions under presidents Bill Clinton and George W. Bush. He is a former member of the United States National Security Council staff and the founder and former president of the Good Harbor consulting group. Cressey served as an adjunct professor of counter-terrorism policy at Georgetown University and is currently a Partner with Liberty Group Ventures, LLC. Education and early life Cressey received his Bachelor of Arts in Political Science from the University of Massachusetts Lowell in 1987 and a Master of Arts in Security Policy Studies from George Washington University in 1991.Greater Talent NetworkRoger Cressey (accessed 16 May 2008) He has taught a graduate course on U.S. counter-terrorism policy at Georgetown University,Good Harbor ConsultingRoger W. Cressey – President(accessed 16 May 2008) where he served as an adjunct professor from 2000-2006. Career Cress ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasitic
Parasitism is a close relationship between species, where one organism, the parasite, lives on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life. The entomologist E. O. Wilson has characterised parasites as "predators that eat prey in units of less than one". Parasites include single-celled protozoans such as the agents of malaria, sleeping sickness, and amoebic dysentery; animals such as hookworms, lice, mosquitoes, and vampire bats; fungi such as honey fungus and the agents of ringworm; and plants such as mistletoe, dodder, and the broomrapes. There are six major parasitic strategies of exploitation of animal hosts, namely parasitic castration, directly transmitted parasitism (by contact), trophicallytransmitted parasitism (by being eaten), vector-transmitted parasitism, parasitoidism, and micropredation. One major axis of classification concerns invasiveness: an endoparasite lives inside the host's body; an e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copepod
Copepods (; meaning "oar-feet") are a group of small crustaceans found in nearly every freshwater and saltwater habitat (ecology), habitat. Some species are planktonic (inhabiting sea waters), some are benthos, benthic (living on the ocean floor), a number of species have parasitic phases, and some continental species may live in limnoterrestrial habitats and other wet terrestrial places, such as swamps, under leaf fall in wet forests, bogs, springs, ephemeral ponds, and puddles, damp moss, or water-filled recesses (phytotelmata) of plants such as bromeliads and pitcher plants. Many live underground in marine and freshwater caves, sinkholes, or stream beds. Copepods are sometimes used as Ecological indicator, biodiversity indicators. As with other crustaceans, copepods have a larval form. For copepods, the egg hatches into a Crustacean larvae#Nauplius, nauplius form, with a head and a tail but no true thorax or abdomen. The larva molts several times until it resembles the adult an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
