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Diclybothrium atriatum n. sp. (Monogenea: Diclybothriidae) from North American acipenserid fishes with observations on Diclybothrium armatum and Diclybothrium hamulatum

Identifieur interne : 000630 ( PascalFrancis/Curation ); précédent : 000629; suivant : 000631

Diclybothrium atriatum n. sp. (Monogenea: Diclybothriidae) from North American acipenserid fishes with observations on Diclybothrium armatum and Diclybothrium hamulatum

Auteurs : A. Choudhury [Canada] ; T. A. Dick [Canada]

Source :

RBID : Pascal:97-0132372

Descripteurs français

English descriptors

Abstract

Diclybothrium atriatum n. sp. is described from North American acipenserid fishes, Acipenser fulvescens Rafinesque (lake sturgeon) and Acipenser brevirostrum Le Sueur (shortnose sturgeon). Diclybothrium atriatum is distinguished from other diclybothriids by the presence of a unique preovarial structure that we name the ventral atrial organ. This structure possesses a ventral orifice leading to a deep groove that widens internally as a crypt, bordered by densely staining granular bodies and more deeply situated glandular cells. Previous records of Diclybothrium armatum Leuckart, 1835 examined in this study from North American acipenserids are referable to D. atriatum. Studies on the anatomy of this and other species of Diclybothrium Leuckart, 1835, D. armatum and Diclybothrium hamulatum (Simer, 1929), reveal the presence of paired multichanelled sperm ducts that are shown to be characteristic of the Diclybothriidae Bykhovskii and Gusev, 1950. Paired sperm ducts, while common in Turbellaria with multiple testes, are unusual amongst Monogenea. The endemicity of Diclybothrium atriatum and specificity for A. fulvescens and A. brevirostrum suggests that speciation of this parasite may have occurred following the isolation of Acipenser L. spp. in central and eastern North America.
pA  
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A05       @2 82
A06       @2 6
A08 01  1  ENG  @1 Diclybothrium atriatum n. sp. (Monogenea: Diclybothriidae) from North American acipenserid fishes with observations on Diclybothrium armatum and Diclybothrium hamulatum
A11 01  1    @1 CHOUDHURY (A.)
A11 02  1    @1 DICK (T. A.)
A14 01      @1 Department of Zoology, University of Manitoba @2 Winnipeg, Manitoba, R3T 2N2 @3 CAN @Z 1 aut. @Z 2 aut.
A20       @1 965-976
A21       @1 1996
A23 01      @0 ENG
A43 01      @1 INIST @2 2087 @5 354000061241360150
A44       @0 0000 @1 © 1997 INIST-CNRS. All rights reserved.
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A47 01  1    @0 97-0132372
A60       @1 P
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C01 01    ENG  @0 Diclybothrium atriatum n. sp. is described from North American acipenserid fishes, Acipenser fulvescens Rafinesque (lake sturgeon) and Acipenser brevirostrum Le Sueur (shortnose sturgeon). Diclybothrium atriatum is distinguished from other diclybothriids by the presence of a unique preovarial structure that we name the ventral atrial organ. This structure possesses a ventral orifice leading to a deep groove that widens internally as a crypt, bordered by densely staining granular bodies and more deeply situated glandular cells. Previous records of Diclybothrium armatum Leuckart, 1835 examined in this study from North American acipenserids are referable to D. atriatum. Studies on the anatomy of this and other species of Diclybothrium Leuckart, 1835, D. armatum and Diclybothrium hamulatum (Simer, 1929), reveal the presence of paired multichanelled sperm ducts that are shown to be characteristic of the Diclybothriidae Bykhovskii and Gusev, 1950. Paired sperm ducts, while common in Turbellaria with multiple testes, are unusual amongst Monogenea. The endemicity of Diclybothrium atriatum and specificity for A. fulvescens and A. brevirostrum suggests that speciation of this parasite may have occurred following the isolation of Acipenser L. spp. in central and eastern North America.
C02 01  X    @0 002A12D01
C03 01  X  FRE  @0 Systématique @5 01
C03 01  X  ENG  @0 Taxonomy @5 01
C03 01  X  SPA  @0 Sistemática @5 01
C03 02  X  FRE  @0 Diagnose @5 02
C03 02  X  ENG  @0 Diagnosis (taxonomy) @5 02
C03 02  X  SPA  @0 Diagnosis @5 02
C03 03  X  FRE  @0 Morphologie @5 03
C03 03  X  ENG  @0 Morphology @5 03
C03 03  X  GER  @0 Morphologie @5 03
C03 03  X  SPA  @0 Morfología @5 03
C03 04  X  FRE  @0 Biométrie @5 04
C03 04  X  ENG  @0 Biometrics @5 04
C03 04  X  SPA  @0 Biometría @5 04
C03 05  X  FRE  @0 Répartition géographique @5 05
C03 05  X  ENG  @0 Geographic distribution @5 05
C03 05  X  SPA  @0 Distribución geográfica @5 05
C03 06  X  FRE  @0 Espèce nouvelle @5 07
C03 06  X  ENG  @0 New species @5 07
C03 06  X  SPA  @0 Especie nueva @5 07
C03 07  X  FRE  @0 Amérique du Nord @2 NG @5 12
C03 07  X  ENG  @0 North America @2 NG @5 12
C03 07  X  GER  @0 Nordamerika @2 NG @5 12
C03 07  X  SPA  @0 America del norte @2 NG @5 12
C03 08  X  FRE  @0 Diclybothrium hamulatum @2 NS @4 INC @5 64
C03 09  X  FRE  @0 Diclybothrium armatum @2 NS @4 INC @5 65
C03 10  X  FRE  @0 Diclybothrium atriatum n. sp. @2 NS @4 INC @5 68
C03 11  X  FRE  @0 Acipenseridae @2 NS @4 INC @5 69
C07 01  X  FRE  @0 Amérique @2 NG
C07 01  X  ENG  @0 America @2 NG
C07 01  X  SPA  @0 America @2 NG
C07 02  X  FRE  @0 Monogenea @2 NS @5 58
C07 02  X  ENG  @0 Monogenea @2 NS @5 58
C07 02  X  SPA  @0 Monogenea @2 NS @5 58
C07 03  X  FRE  @0 Plathelmintha @2 NS
C07 03  X  ENG  @0 Plathelmintha @2 NS
C07 03  X  SPA  @0 Plathelmintha @2 NS
C07 04  X  FRE  @0 Helmintha @2 NS
C07 04  X  ENG  @0 Helmintha @2 NS
C07 04  X  SPA  @0 Helmintha @2 NS
C07 05  X  FRE  @0 Invertebrata @2 NS
C07 05  X  ENG  @0 Invertebrata @2 NS
C07 05  X  SPA  @0 Invertebrata @2 NS
C07 06  X  FRE  @0 Pisces @2 NS @5 59
C07 06  X  ENG  @0 Pisces @2 NS @5 59
C07 06  X  SPA  @0 Pisces @2 NS @5 59
C07 07  X  FRE  @0 Vertebrata @2 NS
C07 07  X  ENG  @0 Vertebrata @2 NS
C07 07  X  SPA  @0 Vertebrata @2 NS
N21       @1 055

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Pascal:97-0132372

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<div type="abstract" xml:lang="en">Diclybothrium atriatum n. sp. is described from North American acipenserid fishes, Acipenser fulvescens Rafinesque (lake sturgeon) and Acipenser brevirostrum Le Sueur (shortnose sturgeon). Diclybothrium atriatum is distinguished from other diclybothriids by the presence of a unique preovarial structure that we name the ventral atrial organ. This structure possesses a ventral orifice leading to a deep groove that widens internally as a crypt, bordered by densely staining granular bodies and more deeply situated glandular cells. Previous records of Diclybothrium armatum Leuckart, 1835 examined in this study from North American acipenserids are referable to D. atriatum. Studies on the anatomy of this and other species of Diclybothrium Leuckart, 1835, D. armatum and Diclybothrium hamulatum (Simer, 1929), reveal the presence of paired multichanelled sperm ducts that are shown to be characteristic of the Diclybothriidae Bykhovskii and Gusev, 1950. Paired sperm ducts, while common in Turbellaria with multiple testes, are unusual amongst Monogenea. The endemicity of Diclybothrium atriatum and specificity for A. fulvescens and A. brevirostrum suggests that speciation of this parasite may have occurred following the isolation of Acipenser L. spp. in central and eastern North America.</div>
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   |texte=   Diclybothrium atriatum n. sp. (Monogenea: Diclybothriidae) from North American acipenserid fishes with observations on Diclybothrium armatum and Diclybothrium hamulatum
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