exoperidium

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Pronunciation key

( ĕks′ō-pǐ-rǐdǐ-əm )

ex•o•pe•rid•i•um

n.

  1. Botany. See peridium.

References

  • The American College Dictionary (Random House) ©1949
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    Exostema

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    Exostema

    A genus of tropical American shrubs or trees of the family Rubiaceae. The bark of one species Exostema caribaceum resembles the bark of the Cinchona trees and has been used as a substitute for quinine.

    Taxonomic Hierarchy
    Kingdom Plantae – Vegetal, plants
    Subkingdom Viridaeplantae – green plants
    Infrakingdom Streptophyta – land plants
    Division Tracheophyta – vascular plants, tracheophytes
    Subdivision Spermatophytina – spermatophytes, seed plants
    Infradivision Angiospermae – flowering plants, angiosperms
    Class Magnoliopsida
    Superorder Asteranae
    Order Gentianales
    Family Rubiaceae – madders, rubiacées
    Genus Exostema (Pers.) Humb. & Bonpl.
    Direct Children:
    Species Exostema caribaeum (Jacq.) Roem. & Schult. – Caribbean princewood, princewood
    Species Exostema ellipticum Griseb. – plateado
    Species Exostema sanctae-luciae (Kentish) Britton – Jamaicanbark
    Exostema, (Pers.) Humb. & Bonpl. Taxonomic Serial No.: 34989

    References

  • Funk and Wagnalls Encyclopedia ©1950
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    Exocoetus

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    Exocoetus

    Taxonomic Hierarchy
    Kingdom Animal, animals
    Subkingdom Bilateria
    Infrakingdom Deuterostomia
    Phylum Chordata – chordates
    Subphylum Vertebrata – vertebrates
    Infraphylum Gnathostomata
    Superclass Osteichthyes – bony fishes
    Class Actinopterygii – ray-finned fishes, spiny rayed fishes
    Subclass Neopterygii – neopterygians
    Infraclass Teleostei
    Superorder Acanthopterygii
    Order Beloniformes – orphies, needlefishes
    Suborder Belonoidei
    Superfamily Exocoetoidea
    Family Exocoetidae – flyingfishes, exocets, voladores
    Genus Exocoetus Linnaeus, 1758 – flyingfishes
    Direct Children:
    Species Exocoetus gibbosus Parin and Shakhovskoy, 2000
    Species Exocoetus monocirrhus Richardson, 1846 – barbel flyingfish, volador barbudo
    Species Exocoetus obtusirostris Günther, 1866 – oceanic two-wing flyingfish, volador flecha, volador oceánico
    Species Exocoetus peruvianus Parin and Shakhovskoy, 2000
    Species Exocoetus volitans Linnaeus, 1758 – tropical two-wing flyingfish, volador tropical
    Exocoetus, Linnaeus, 1758, Taxonomic Serial No.: 165506

    See flying fish.

    References

  • Funk and Wagnalls Encyclopedia ©1950
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    Exoascus

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    Exoascus

    Exoascus or Taphrina, a genus of parasitic fungi of the family Exoascaceae (which is likely no longer valid as it does not appear listed on ITIS.gov's database) a genus which belonged to the class Ascomycetes. These fungi cause various deformities on seed plants, especially trees. One of the species causes the disease known as peach curl, which results in a characteristic curling and deformities of the leaf. Another species forms the so-called plum pockets. In this disease the young plums shrivel and seeds fail to develop. Some species cause brushlike deformities known as witches'-brooms on cherry trees.

    References

  • Funk and Wagnalls Encyclopedia ©1950
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    Exosporeae

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    Exosporeae

    Subclass of slime molds. See Ceratiomyxomycetidae; Myxomycetes.

    Taxonomic Hierarchy
    Kingdom Fungi – fungi
    Division Myxomycota – slime molds, myxomycètes
    Class Myxomycetes – acellular slime molds, plasmoidial slime molds, true slime molds
    Subclass Exosporeae
    Exosporeae, Taxonomic Serial No.: 13772

    References

  • Encyclopedia Britannica Micropedia ©1984
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    Exopterygota

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    Exopterygota

    A traditional classification in zoology, but is invalid. The correct classification is Neoptera. Although Exopterygota is still used by some as a subdivision within the Neoptera, for the moment ITIS is not implementing this.

    Traditionally, Exopterygota was a division (17 orders) of the class Insecta characterized by incomplete metamorphosis and resemblance of the juvenile and the adult.

    References

  • Encyclopedia Britannica Micropedia ©1984
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    exopodite

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    exopodite

    Biology. Part of a crustacean appendage.

    References

  • Encyclopedia Britannica Micropedia ©1984
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    Exogyra

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    Exogyra

    Extinct mollusc genus of the Oyster family, commonly found in shallow-water marine deposits of the Jurassic to Cretaceous periods (dating around 65-190 million years old). Exogyra characteristically had a very thick shell which attained massive proportions. The beak of each valve is spiral. The left valve is spirally twisted, deeply convex, usually strongly marked by radial folds of the surface whereas the right valve is flatter, concave and much smaller and contains a surface that is either smooth or marked by faint radiating lines. A distinctive longitudal pattern of ribbing is highly developed in the left valve. The genus possessed inequilateral, twisted shells resembling somewhat the form of the young plicate shells of the modern edible oyster though the shell of Exogyra is larger and more convex.

    Exogyra
    Exogyra upatoiensis
    Exogyra
    Exogyra ponderosa

    References and Further Reading

  • Funk and Wagnalls Encyclopedia ©1950
  • Encyclopedia Britannica Micropedia ©1984
  • Exogyra collection of C. Newsom, Collected from Texas, Alabama, New Jersey, Utah and Nevada
  • Paleontology of Kentucky
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    exocoetoidei

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    exocoetoidei

    Invalid synonym for Belonoidei. Traditionally the term was a classification for a suborder of fishes of the order Atheriniformes.

    See Belonoidei, Taxonomic Serial No.: 553157.

    References

  • Encyclopedia Britannica Micropedia ©1984
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    Exocoetidae

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    Exocoetidae

    Family of flying fishes.

    Taxonomic Hierarchy
    Kingdom Animal, animals
    Subkingdom Bilateria
    Infrakingdom Deuterostomia
    Phylum Chordata – chordates
    Subphylum Vertebrata – vertebrates
    Infraphylum Gnathostomata
    Superclass Osteichthyes – bony fishes
    Class Actinopterygii – ray-finned fishes, spiny rayed fishes
    Subclass Neopterygii – neopterygians
    Infraclass Teleostei
    Superorder Acanthopterygii
    Order Beloniformes – orphies, needlefishes
    Suborder Belonoidei
    Superfamily Exocoetoidea
    Family Exocoetidae – flyingfishes, exocets, voladores
    Direct Children:
    Genus Cheilopogon Lowe, 1841
    Genus Cypselurus Swainson, 1838
    Genus Danichthys Bruun, 1934
    Genus Exocoetus Linnaeus, 1758 – flyingfishes
    Genus Fodiator Jordan and Meek, 1885
    Genus Hirundichthys Breder, 1928
    Genus Parexocoetus Bleeker, 1866
    Genus Prognichthys Breder, 1928
    Exocoetidae, Taxonomic Serial No.: 165431

    See Flying Fish and Halfbeak.

    References

  • Encyclopedia Britannica Micropedia ©1984
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    exobasidiales

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    exobasidiales

    Fungi. See Basidiomycetes and Earthstar Fungi: Basidiomycetes.

    Taxonomic Hierarchy
    Kingdom Fungi – fungi
    Division Basidiomycota – basidiomycetes, club fungi
    Class Ustomycetes
    Order Exobasidiales
    Direct Children:
    Family Brachybasidiaceae Gäum
    Exobasidiales, Taxonomic Serial No.: 623884

    Farbatlas der Basidiomyceten/Color Atlas Of Basidiomycetes

    References

  • Encyclopedia Britannica Micropedia ©1984
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    Exotic Shorthair (Cat)

    1

    Exotic Shorthair Cat

    Taxonomic Hierarchy
    Kingdom Animal, animals
    Subkingdom Bilateria
    Infrakingdom Deuterostomia
    Phylum Chordata – chordates
    Subphylum Vertebrata – vertebrates
    Infraphylum Gnathostomata
    Superclass Tetrapoda
    Class Mammalia Linnaeus, 1758 – mammals
    Subclass Theria Parker and Haswell, 1897
    Infraclass Eutheria Gill, 1872
    Order Carnivora Bowdich, 1821 – carnivores, carnivores
    Suborder Feliformia Kretzoi, 1945 – cat-like carnivores
    Family Felidae Fischer de Waldheim, 1817 – cats
    Subfamily Felinae Fischer de Waldheim, 1817
    Genus Felis Linnaeus, 1758 – small cats
    Species Felis catus Linnaeus, 1758 – Domestic Cat
    Felis catus, Linnaeus, 1758, Taxonomic Serial No.: 183798

    For many years British breeders experimented with crossbreeding Persian and Russian Blue lines into the British shorthair breed. In the 1950's and 1960's in the U.S., some breeders began using Persians in their American shorthair breeding programs. There was an open registration policy at that time. The goal was to add color not yet available in American shorthairs, such as chinchilla and shaded silver, which at that time existed only in the Persian breed. Resulting from this hybridization the shorthairs began acquiring some undesirable traits, including round heads and soft, excessively long coats. This outcrossing was discontinued by most breeders.

    The hybrids were appreciated by some breeders for the cat's exceptional beauty and uniqueness. In 1966, through the initiative of Jane Martinke, a judge with the CFA, it was suggested to institute a program in recognition of the hybrid. Therefore the CFA decided to designate the new breed as Exotic Shorthair. The ideal was to be a short haired Persian, and all breeders of the hybrid American Shorthairs were given an opportunity for registration of their cats to this new breed.

    By 1967, Exotic Shorthairs were accepted for Championship status. Burmese and Russian Blues were also used in the early years because at that time any shorthair was allowed. Today only Persians are accepted.

    The standard for Exotic Shorthairs is the same as that for Persians except the coat which must be medium length, soft and stands out from the body. The length is slightly longer than that of other short-haired cats but should not be so long that it "flows," as does the Persian's coat. Because of its close ties with the Persian, this breed has been judged along with the long-haired breed group at the CFA shows since 1983.

    Following years of hard work, breeders have produced Exotic Shorthairs equal in body and head type to the Persian. However, the breed still has its own distinct appearance which some call a "teddy bear look," with a stocky body that is boldly apparent with short legs and the neck is more easily seen without the long coat.

    Exotic Shorthair Cat
    Grolier Encyclopedia ©1991
    One of the more recently accepted breeds of cat by the CFA. Its fur has Persian qualities but is as short as that of the Abyssinian and does not mat. Its color is the same as the Persian breed. Its nose is short and snub and its legs are low. This cat was produced by breeding a shorthair with a Persian.

    References and Further Reading

  • Grolier Encyclopedia of Knowledge ©1991
  • Feline Husbandry, pp. 39-40, ©1991 American Veterinary Publications, Inc.
  • Pet MD: Exotic Shorthair
  • About This Breed
  • Vet Street: Exotic Shorthair
  • All Cat Breeds
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    exotropia

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    Pronunciation key

    ( ek′so-trope-ah )

    exotropia

    n.

    1. Divergent strabismus.
    2. Stabismus in which there is permanent deviation of the visual axis of one eye away from that of the other which results in diplopia. Also called Divergent Strabismus and wall-eye.

    Adj. exotropic.

    References

  • Webster's Improved Dictionary and Everyday Encyclopedia ©1956
  • Encyclopedia and Dictionary of Medicine, Nursing and Allied Health ©1978
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