Diclybothrium atriatum n. sp. (Monogenea: Diclybothriidae) from North American acipenserid fishes with observations on Diclybothrium armatum and Diclybothrium hamulatum
Identifieur interne : 001B09 ( Main/Merge ); précédent : 001B08; suivant : 001B10Diclybothrium 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 :
- The Journal of parasitology [ 0022-3395 ] ; 1996.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Biométrie, Répartition géographique.
English descriptors
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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.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Diclybothrium atriatum n. sp. (Monogenea: Diclybothriidae) from North American acipenserid fishes with observations on Diclybothrium armatum and Diclybothrium hamulatum</title><author><name sortKey="Choudhury, A" sort="Choudhury, A" uniqKey="Choudhury A" first="A." last="Choudhury">A. Choudhury</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Department of Zoology, University of Manitoba</s1><s2>Winnipeg, Manitoba, R3T 2N2</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Canada</country><placeName><settlement type="city">Winnipeg</settlement><region type="state">Manitoba</region></placeName><orgName type="university">Université du Manitoba</orgName></affiliation></author><author><name sortKey="Dick, T A" sort="Dick, T A" uniqKey="Dick T" first="T. A." last="Dick">T. A. Dick</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Department of Zoology, University of Manitoba</s1><s2>Winnipeg, Manitoba, R3T 2N2</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Canada</country><placeName><settlement type="city">Winnipeg</settlement><region type="state">Manitoba</region></placeName><orgName type="university">Université du Manitoba</orgName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">97-0132372</idno><date when="1996">1996</date><idno type="stanalyst">PASCAL 97-0132372 INIST</idno><idno type="RBID">Pascal:97-0132372</idno><idno type="wicri:Area/PascalFrancis/Corpus">000481</idno><idno type="wicri:Area/PascalFrancis/Curation">000630</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000492</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000492</idno><idno type="wicri:doubleKey">0022-3395:1996:Choudhury A:diclybothrium:atriatum:n</idno><idno type="wicri:Area/Main/Merge">001B09</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Diclybothrium atriatum n. sp. (Monogenea: Diclybothriidae) from North American acipenserid fishes with observations on Diclybothrium armatum and Diclybothrium hamulatum</title><author><name sortKey="Choudhury, A" sort="Choudhury, A" uniqKey="Choudhury A" first="A." last="Choudhury">A. Choudhury</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Department of Zoology, University of Manitoba</s1><s2>Winnipeg, Manitoba, R3T 2N2</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Canada</country><placeName><settlement type="city">Winnipeg</settlement><region type="state">Manitoba</region></placeName><orgName type="university">Université du Manitoba</orgName></affiliation></author><author><name sortKey="Dick, T A" sort="Dick, T A" uniqKey="Dick T" first="T. A." last="Dick">T. A. Dick</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Department of Zoology, University of Manitoba</s1><s2>Winnipeg, Manitoba, R3T 2N2</s2><s3>CAN</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Canada</country><placeName><settlement type="city">Winnipeg</settlement><region type="state">Manitoba</region></placeName><orgName type="university">Université du Manitoba</orgName></affiliation></author></analytic><series><title level="j" type="main">The Journal of parasitology</title><title level="j" type="abbreviated">J. parasitol.</title><idno type="ISSN">0022-3395</idno><imprint><date when="1996">1996</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">The Journal of parasitology</title><title level="j" type="abbreviated">J. parasitol.</title><idno type="ISSN">0022-3395</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Biometrics</term><term>Diagnosis (taxonomy)</term><term>Geographic distribution</term><term>Morphology</term><term>New species</term><term>North America</term><term>Taxonomy</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Systématique</term><term>Diagnose</term><term>Morphologie</term><term>Biométrie</term><term>Répartition géographique</term><term>Espèce nouvelle</term><term>Amérique du Nord</term><term>Diclybothrium hamulatum</term><term>Diclybothrium armatum</term><term>Diclybothrium atriatum n. sp.</term><term>Acipenseridae</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Biométrie</term><term>Répartition géographique</term></keywords></textClass></profileDesc></teiHeader><front><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></front></TEI><affiliations><list><country><li>Canada</li></country><region><li>Manitoba</li></region><settlement><li>Winnipeg</li></settlement><orgName><li>Université du Manitoba</li></orgName></list><tree><country name="Canada"><region name="Manitoba"><name sortKey="Choudhury, A" sort="Choudhury, A" uniqKey="Choudhury A" first="A." last="Choudhury">A. Choudhury</name></region><name sortKey="Dick, T A" sort="Dick, T A" uniqKey="Dick T" first="T. A." last="Dick">T. A. Dick</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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