Case 2855. Cristellaria Humilis Reuss, 1863 (Currently Astacolus Humilis; Foraminiferida): Proposed Replacement Of Neotype By Rediscovered Lectotype, And Rotalia Schloenbachi (Currently Notoplanulina? Schloenbachi; Foraminiferida): Proposed Placement On T

3 Pages·1993·0.54 MB·English

by  Helen Meyn

202 BulletinofZoologicalNomenclature50(3)September1993
Case 2855
Cristellaria humilis Reuss, 1863 (currently Astacolushumilis;
Foraminiferida): proposed replacement ofneotype by rediscovered
lectotype, and Rotaliaschloenbachi(currently Notoplanulinal
schloenbachi; Foraminiferida): proposed placement on the Official List
Helen Meyn &Jiirgen Vespermann
Institutfi'ir Geowissenschaften, Teclmische Universital Braunschweig,
Pockelsstrasse4. D-38106 Braunschweig. Germany
Abstract.ThepurposeofthisapphcationistoreplacetheneotypeoftheCretaceous
foraminifer Astacolus humilis (Reuss, 1863) with the lectotype designated from
Reuss'scollectionrecentlyrediscoveredintheNaturhistorischesMuseum,Vienna.It
is proposed also to place the specific name ofNotoplaiiulina?schloenbachi(Reuss,
1863)ontheOfficial List.
1. In 1863ReussdescribedalargenumberofforaminiferafromtheCretaceousof
North Germany. Two ofhis species, Cristellaria humilis and Roialiaschloenbachi.
arehereconsideredinturn.TheReusscollectionwasbelievedtohavebeenlostbut
its rediscovery was announced by Papp, Rogl & Schmid (1977). We (Meyn &
Vespermann, 1993) redescribed the material, which is in the Naturhistorisches
Museum, Vienna. We now ask (para. 5 below) the Commission to rule that the
neotypedesignatedbyBartenstein(1974)(seepara.2below)forCristellariahumilis
bereplacedbythelectotypefromtherediscovered Reusscollection.
CristellariahumilisReuss, 1863(p. 65,pi. 6,figs. 16. 17)
2. Bartenstein (1974, p. 554, pi. 2, fig. 19) designated and figured a neotype
from the basal Lower Hauterivian, N.W. Berklingen (Asse), the type locality of
Reuss;itisregisteredasC30173intheNaturhistorischesMuseum,Basle.We(Meyn
& Vespermann, 1989) examined Reuss's rediscovered collection and (Meyn &
Vespermann, 1993)proposeasthelectotypethespecimenfiguredbyReussinpi.6,
fig. 16,whichisregisteredasno.970intheReusscollection.Thelectotypeisbetter
preservedthan theneotype. Even thoughtheapertureofthelectotypeisdamaged,
theaperturalsocketshowsitsrearwards-directedposition.Reussemphasizedthathis
figure(pi. 6,fig. 16)characterizedthe"typicalformofthetest"fromtheBerklingen
area. WehavetopotypicsamplesfromlocalitiesmentionedbyReussandcanmake
a direct comparison between the syntypes and our own material. The mode of
preservation of the specimens and the faunal composition of the samples have
enabledustodeterminethestratigraphichorizonofthesyntypes.Cristellariahumilis
is from the lower LowerHauterivian ofBerklingen and the syntypescame froma
sampleofthecalcareousmarlswhicharefoundlocallyonlyintheeasternpartofthe
Lower Saxony Basin. The "Oberer Hilsthon" ofReuss does not necessarily corre-
spondwiththeuppermostHauteriviantoBarremianasstatedbyBartenstein(1974,
pp. 541, 555). The "tiefster oberer Hilsthon" ofthe Berklingen area (Reuss, 1863,
BulletinofZoologicalNomenclature50(3)September1993 203
p.9)isinfactLowerHauterivian(seeMeyn&Vespermann,1987).Thelectotypeand
neotypeareconspecificsonochangeintheconceptofthespecieswouldresultfrom
thereplacementoftheneotypebythelectotype.
3. Article75hoftheCodestatesthat'if.afterthedesignationofaneotype,the...
lectotype...isfoundstilltoexist,thecaseistobereferredtotheCommissiontorule
whether the neotype is or is not to be retained as the name-bearing type'. We
recommend that the neotype of Cristellaria huinilis should not be retained as the
name-bearingtype.
RotaliaschloenbachiReuss, 1863(p. 84.pi. 10,fig. 5)
4. Crittenden&Price(1991,p.254)designatedaneotypeforRotaliaschloenbachi
fromthesamegeographicalareaand thesamegeologicalformation(GaultClay =
Minimusthon)asReuss'slocality.TheneotypeisnumberedBM(NH)P.52254inthe
collectionsoftheNaturalHistoryMuseuminLondon.Theyconsideredinturneach
ofthequalifyingconditionsforavalidneotypedesignationgiveninArticle75dofthe
Code. However,theyoverlookedthefactthatReuss'scollectionhadbeenrediscov-
ered,asreportedbyPapp,Rogl&Schmid(1977)andbyus(Meyn&Vespermann,
1989). It follows that their neotype designation was invalid. We (Meyn &
Vespermann, 1993) propose a lectotype (no. 1685 in the Reuss collection). No
Commission action is required to set aside Crittenden & Price's invalid neotype
designationbutweasktheCommissiontoplaceRoialiaschloenbachiontheOiTicial
List of Specific Names in Zoology as the most effective way of recording the
situation.
5. The International Commission on Zoological Nomenclature is accordingly
asked:
(1) tosetasidetheneotypedesignationforCristellariahumilisReuss, 1863made
by Bartenstein(1974);
(2) toplaceontheOfficialListofSpecificNamesinZoologythefollowingnames:
(a)humilisReuss, 1863,aspublishedinthebinomenCristellariahumilisandas
definedbythelectotypeproposedbyMeyn&Vespermann(1993)(no.970
intheReusscollection);
(b)schloenbachiReuss, 1863,aspublishedinthebinomenRotaliaschloenbachi
andasdefined bythelectotypeproposedbyMeyn&Vespermann(1993)
(no. 1685intheReusscollection).
References
—
Bartenstein, H. 1974. Lenliculina {Lenticulinu) nodosa (Reuss 1863) and its subspecies
worldwideindexforaminiferaintheLowerCretaceous.EclogaeGeologicaeHehetiae,67:
539-562.
Crittenden,S.&Price.R.J. 1991.TheforaminiferidOsangulariaschloenbachi(Reuss. 1863);
theerectionofaneotype.JournalofMicropalaeontology,9:253-256.
Meyn,H.&Vespermann.J.1987.Criticalstudyofthetypelocalitiesandtypestagespublished
by Koch 1851, Roemer 1841, 1842,and Reuss 1863 in theLowerCretaceousofN.W.
Germany.NewslettersonStratigraphy.18:7-19.
Meyn,H.&Vespermann,J. 1989.TheReussCollection(Cretaceousforaminifers)inVienna.
JournalofPaleontology.63:388.
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Meyn,H.&Vespermann,J. 1993[inpress].TaxonomischeRevisionvonForaminiferender
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