Opinion 1717 Bucephalus Baer, 1827 and B. Polymorphus Baer, 1827 (Trematoda): conserved in their accepted usage

3 Pages·1993·0.58 MB·English

by  International Commission on Zoological Nomenclature

152 BulletinofZoologicalNomenclature50(2)June1993
OPINION 1717
Bucephalus Baer, 1827 and B.polymorphus Baer, 1827 (Trematoda):
conserved in their accepted usage
Ruling
(1) Under the plenary powers all previous fixations of type specimens for the
nominal species Bucephalus polymorphus Baer, 1827 are hereby set aside and
microscopicpreparationno. 1655bintheZoologicalMuseum,HumboldtUniversity,
Berlin(thelectotypeofGasterostomumfimbriatumSiebold, 1848)isdesignatedasthe
neotype.
(2) ThefollowingnamesareherebyplacedontheOfficialListofGenericNames
inZoology:
(a) BucephahisBaer, 1827(gender:masculine),typespeciesbymonotypyBuceph-
aluspolymorphusBaer, 1827;
(b) Rliipidocotyle Diesing, 1858 (gender: feminine), type species by subsequent
designationbyNicoU(1914)GasterostomumminimumWagener, 1852(ajunior
subjectivesynonymofMonostomagaleatumRudolphi, 1819).
(3) ThefollowingnamesareherebyplacedontheOfficialListofSpecificNames
inZoology:
(a) polymorphusBaer, 1827,aspublishedinthebinomenBucephaluspolymorphus
andasdefinedbytheneotypedesignatedin(1)above(specificnameofthetype
speciesotBucephalusBaer, 1827);
(b) galeatum Rudolphi, 1819,aspublishedinthebinomen Monostomagaleatum
(seniorsubjective synonym ofthe specific name ofGasterostomum minitnum
Wagener, 1852,thetypespeciesofRliipidocotyleDiesing, 1858);
(c) campanulaDujardin, 1844,aspublishedinthebinomenDistomacampanula.
(4) ThenameGasterostomumSiebold, 1848isherebyplacedontheOfficialIndex
ofRejectedandInvalidGenericNamesinZoology(ajuniorobjectivesynonymof
BucephalusBaer, 1827).
(5) ThenamefimbriatumSiebold, 1848, aspublishedinthebinomen Gasterosto-
mumfimbriatum and as defined by the lectotype designated by Baturo (1979), is
hereby placed on the Official Index of Rejected and Invalid Specific Names in
Zoology(ajuniorobjectivesynonymofthespecificnameoiBucephaluspolymorphus
Baer, 1827).
HistoryofCase2251
AnapplicationfortheconservationofthegenericandspecificnamesofBiuephalus
polymorphus Baer, 1827 by thedesignation ofa neotypewas received from Dr B.
Baturo{InlandFisheriesInstitute. Olsztyn. Poland)on27February 1978. Noticeof
thecasewassenttoappropriatejournals.Thehistoryofthislong-standingcasewas
summarised in notes on BZN 49: 6 and 62. After correspondence the case was
republishedin BZN49: 6-11 (March 1992)withtheagreementofDrBaturo.
Dr Srivastava (ZoologicalSurvey ofIndia. Calcutta), who opposed Dr Baturo's
original applicationpublished in BZN 36: 30-36 (July 1979), wasnotified(August
1991) ofthe intention to republish it. Dr David I. Gibson (77(f Natural History
BulletinofZoologicalNomenclature50(2)June1993 153
Museum, London, U.K.)hadalsowrittentoDrSrivastavainSeptember 1988.There
hasbeennoreplytoeithercommunication.
A shortened version ofDr Srivastava's comment (received January 1981) was
published(BZN49:62-64)atthesametimeastherepublishedapplication,together
with recent comments in support of Dr Baturo's application from Dr Gibson,
DrO.N.Pugachev(ZoologicalInstitute,RussianAcademyofSciences,StPetersburg,
Russia)andProfJ.C.Pearson(UniversityofQueensland,Australia).Acopyofthese
commentswassenttoDrSrivastavaatthetimeofpubhcation.
ItwasnotedonthevotingpaperthattheessentialdifferencebetweenDrBaturo's
positionandthatofDrSrivastavawasthattheformerproposedconservationofthe
established usage of the names Bucephalus and polymorphus, whereas the latter
(following priority strictly) would transfer these names to the taxon known as
Rhipidocotyle illensis (= campanula). Drs Gibson and Pugachev and ProfPearson
opposedthereplacementoiRJiipidocotylebyBucephalus(andoiBucephalusauctt.by
Gasterostomum)whichwouldresultfromadherencetopriority.
DecisionoftheCommission
On 1 December 1992themembersoftheCommissionwereinvitedtovoteonthe
proposalspublishedinBZN49:9-10.Atthecloseofthevotingperiodon 1 March
1993 thevoteswere—asfollows:
Affirmativevotes 25: Bayer, Bock, Bouchet(inpart). Cocks,Cogger, Corliss,
Dupuis, Hahn, Halvorsen, Heppell, Holthuis, Kabata, Kraus, Macpherson,
Mahnert, Minelli, Nielsen, Nye, Ride, Savage, Schuster, Starobogatov, Trjapitzin,
Ueno,Willink —
Negativevotes 4: Lehtinen,MartinsdeSouza,StysandThompson.
Bouchet supported conservation of the usage of Bucephalus polymorphus but
consideredthattheCommissionshouldnotbeinvolvedwithquestionsofsubjective
synonymy such as the placing ofRliipidocotyle galeata and R. campanula on the
Official List of Specific Names. (Editorial note. The type of Rliipidocotyle is the
nominalspecies Gasterostomumminimum,asgiveninruling(2)(b). Ithaslongbeen
thepracticetociteseniorsubjectivesynonymsoftypespeciesintheOfficialLists(in
accordancewithRecommendation67BoftheCode)butinthisandallothercasesit
is not to be inferred that the Commission takes any view on the taxonomic
synonymy. R. campanula is placed on the List as a senior subjective synonym of
R. illensis, repeatedly mentioned in this case; again the Commission has taken no
viewonthesupposedsynonymyandtheplacingofnamesonOfficialListsconfersno
specialstatusonthem(Article78foftheCode)).
Lehtinen and Martins de Souza commented that with the current taxonomic
knowledgeofthegroupitwaspreferablethatpriorityshouldapply.Styscommented:
'Incasesconcerningnamesofspecieswithcomplexdevelopmentitisbettertostay
with the generally understood Principle ofPriority when discoveries in taxonomy
lead to concomitant nomenclatural changes, rather than to make exceptions by
invokingtheplenarypowers.Zoologistsstudyingsuchgroupsshouldexpectandbe
preparedtoacceptsuchnamechanges".
Originalreferences
ThefollowingaretheoriginalreferencestothenamesplacedonOfficialListsandOfficial
IndexesbytherulinggiveninthepresentOpinion:
154 BulletinofZoologicalNomenclature50(2)June1993
BucephalusBaer,1827,NovaActaPhysico-MedicaAcademiaeCaesareaeLeopoldino-Carolinae
NaturaeCuriosorum, 13: 570.
campanula, Distoma, Dujardin, 1844, Histoire naturelle deshelminthes ou vers intestinaux,
p.435.
fimbriatum, Gasterostomum,Siebold, 1848,Lehrbuchder vergleichendeAnatomiederwirbel-
losen Thiere,vol. 1,p. 129.
galeatum.Monosloma,Rudolphi, 1819,Enlozoorumsynopsis, cuiacceduntmantissaduplexel
indiceslocuplelissimi,p.86.
Gasterostomum Siebold, 1848, Lehrbuch der vergleichende Anatomieder wirbellosen Thiere,
vol. 1,p. 129.
polymorphus, Bucephalus, Baer, 1827, Nova Acta Physico-Medica Academiae Caesareae
Leopoldino-CarolinaeNaturaeCuriosorum,13:570.
Rhipidocotyle Diesing, 1858, Sitzungsberichte der Mathematisch-Naturwissenschaftlichen
ClassederKaiserlichenAkademieder Wissenschaften,32:313.
ThefollowingisthereferenceforthedesignationofGasterostomumminimumWagener,1852
asthetypespeciesofthenominalgenusRhipidocotyleDiesing, 1858:
NicoU,W. 1914.JournaloftheMarineBiologicalAssociationoftheUK,(2)10:490.
The following is the reference for the designation of the lectotype of Gasterostomum
fimbriatumSiebold. 1848:
Baturo,B. 1979.BZN36:33.