Thalmanninella

Daughter taxa (time control age-window is: 0-800Ma)
			Thalmanninella appenninica
			Thalmanninella balernaensis
			Thalmanninella brotzeni
			Thalmanninella deeckei
			Thalmanninella evoluta
			Thalmanninella gandolfii
			Thalmanninella globotruncanoides
			Thalmanninella greenhornensis
			Thalmanninella micheli
			Thalmanninella praebalernaensis
			Thalmanninella reicheli
			Thalmanninella sp. Specimens which cannot be assigned to established species

Taxonomy

Original description: Test inégalement biconvexe, convexité plus forte du côté ombilical, contour périphérique peu lobé, sauf â hauteur des 2 ou 3 dernières loges. Côté spiral montrant 3-3.5 tours de spire; à loges planes ou même un peu concaves par rapport aux bourrelets suturaux; le dernier tour comprend de 7 à 9 loges; les bourrelets suturaux sont arqués vers l'avant et en abordant la périphérie où ils constituent le bourrelet carénal, ils dessinent un angle arrondi obtuse chaque loge chevauche la suîvante; le côté spiral présente ainsi un aspect tout à fait semblable à celui d'une Globotruncana typique.

Côté ombilical montrant des loges tétraédriques arquées dans le sens d'enroulement et étroitement appliquées les unes contre les autres, si bien que les dépressions suturales sont fermées et absentes; le sommet de chaque loge qui surplombe la dépression ombilicale est renforcé par un bourrelet qui se continue le long des sutures, particulièrement le long de la suture antérieure qui passe directement au bourrelet carénal; chaque loge semble: ainsi encore chevaucher la suivante, cependant s'il ya bien continuté du bourrelet le bord antérieur de la Joge est dominé par le bord postérieur, plus élevé de la loge suivante. Chaque loge se prolonge vers l'ombilic par un pont calcaire, mai celui de la dernière loge masque la plus grande partie des autres. Les extrémités adombilicales des loges, compte non tenu de ce prolongement sont approximativement alignées les unes par rapport aux autres.

Dépression ombilicale, grande et profonde. Périphérie ornée d'une carène unique assez importante, qui se continue comme dans le genre Rotalipora Brotzen, après une bifurcation très rapide, dans les bourrelets suturaux antérieurs des deux côtés du test. Ouverture intériomargjnale de la dernière loge seule visible, sur les individus intacts tout au moin, haute et se continuant sous le pont calcaire, à la base d'un léser gauchissement de la face septale de la loge. Ouverture intraombilicale petite, entourée d'un côté par un bourrelet léger limitée de 1'autre côté par la face adombilicale de la loge précédente ou par son prolongement calcaire. Enroulement sénestre, plus rarement dextre. Famille Globorotaliidae.

Entries in the Catalog of original descriptions: Thalmanninella

Geological Range:
Last occurrence (top): at top of W. archaeocretacea zone (100% up, 93.5Ma, in Turonian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within P. subticinensis zone (103.94-106.98Ma, base in Albian stage). Data source: Total of ranges of species in this database

Plot of range and occurrence data:

• Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
• Triangles indicate an event for which a precise placement has been suggested
• Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Rotaliporidae

Thalmanninella compiled by the pforams@mikrotax project team viewed: 5-10-2024 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=110539 Go to Archive.is to create a permanent copy of this page - citation notes

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Comments (3)

 

 

 

 

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Friedrich Wilhelm Luppold

Posts: 1

Since: Apr 2021

Friedrich Wilhelm Luppold(Germany)

It would be helpful for non experts to discuss the characteristic differences between all species of the genus Thalmanninella.

25 April 2021 21:37

Jeremy Young

Posts: 533

Since: Jan 2017

Jeremy Young(UK)

Dear Friedrich.

You are completely correct, adding short statements on the differences between taxa is really useful. On the Cenozoic site we have been able to do this almost everywhwre, but it takes time and for the Cenozoic it was often possible to edit existing text. It is more of a challenge for the Mesozoic as there are few previous species-level syntheses, but I will certainly pass on your comment/encouragement to Brian Huber and his colleagues.

Jeremy

26 April 2021 09:15

Brian Huber

Posts: 14

Since: Aug 2017

Brian Huber(US)

Dear Friedrich,

Many thanks for your suggestion. We need to add discriminating features to all species in the Mesozoic database by extracting text and citing published works that clarify differences between species.

Regards,

Brian Huber

27 April 2021 17:27

 

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