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Brian,
I am not aware of any valid reference to Globigerinellopsis.
The genus Globigerinopsis, however, was described by Bolli (1962), and
about a handful of species were referred to this genus, which shares
with Globigerinoides the characteristic supplementary apertures.
Globigerinopsis later becomes streptospiral, which makes the difference
from Globigerinoides.
The gerontic specimens of G. mitra usually show a loose arrangement of
elongate chambers, which may be looked at as a streptospiral coiling. I
fear the little used Globigerinopsis met the appeal of the cretaceous
name Globigerinelloides to finally merge in a new chimeric name. The
multiple names beginning with Globigerin- are a pest to the databases....
JLV
Robert Huber a écrit :
>Dear all,
>
>Recently I was playing with the CHRONOS tool which frequently
>sends database queries to my TaxonConcept toy. One of the
>'demo taxa queries' I received many times was for the taxon
>Globigerinoides mitra, which is fine..
>
>When comparing the TaxonConcept search results with those of
>CHRONOS I found that CHRONOS has listed a synonym called
>'Globigerinellopsis mitra. '
>
>I never heard of this Genus, which doesn't mean too much ;),
>but I got curious and tried to find out where the name comes
>from using several databases with little success.
>
>The only hits I got was from literature databases was the
>article:
>Boersma, A. 1984 Cretaceou-{Tertiary planktonic foraminiferas
>from the south-eastern Atlantic, Walvis Ridge area, Deep Sea
>Drilling Project Leg 74. Initial Rep. DSDP 74,501-523
>But here the name is only used in relative abundance counts a
>sytematic section is missing.
>Other hits lead me to the PANGAEA database where other species
>count data from A. Boersma are listed.
>
>I am still wondering where the genus name comes from (is it a
>valid name?)and if Globigerinellopsis mitra is really a synonym
>for Globigerinoides mitra...
>Maybe someone can direct me to some reference(s)?
>Thanks in advance,
>
>Robert
>
>P.S:
>Here are some links to CHRONOS/TaxonConcept/Pangaea if you
>want to test the queries yourself:
>
>http://portal.chronos.org/gridsphere/gridsphere?cid=xqe_beta
>http://taxonconcept.stratigraphy.net
>http://www.pangaea.de/PangaVista
>
>
>Dr. Robert Huber
>WDC-MARE / PANGAEA - www.pangaea.de, www.wdc-mare.org
>Stratigraphy.net - www.stratigraphy.net
>_____________________________________________
>MARUM - Institute for Marine Environmental Sciences (location)
>University Bremen
>Leobener Strasse
>POP 330 440
>28359 Bremen
>Phone ++49 421 218-65593, Fax ++49 421 218-65505
>e-mail rhuber@wdc-mare.org, robert.huber@stratigraphy.net
>
>
>
>
>
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