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Topic: Littorinimorpha


In the News (Fri 27 Nov 09)

  
  Publikationen/Band 13   (Site not responding. Last check: 2007-10-12)
Abstract: The orders Cerithiimorpha and Littorinimorpha represent large systematic units within the stem of Caenogastropoda with simple conical-orthostrophic protoconchs.
Within the Littorinimorpha characters regarding the early shell could be worked out to subdivide Littorinoidea and Rissooidea.
The convergent Vanikoridae could be discriminated by their protoconch-morphology and signi-ficant differences to the other Littorinimorpha are presented.
userpage.fu-berlin.de /~jevers/data/publikationen/Band27.htm   (405 words)

  
 NMITA Gastropod taxonomic list
Instead I have placed subgenera (if recognized) in alphabetical order within a genus, genera alphabetically within a family, families alphabetically within superfamilies and so on through to the level of ‘Infraorder’ (e.g.
Littorinimorpha, Ptenoglossa and Neogastropoda of the ‘Superorder’ Caenogastropoda).
Hierarchical rank is not specified, though authors and dates are given for families, but relative ranking is shown by font size, bold capitalisation and then, from Order/’Superorder’-levels, by degree of indentation from the margin.
porites.geology.uiowa.edu /database/mollusc/systemat/gastrtax.htm   (1040 words)

  
 Spider Shell
Spider Shell (Lambis Lambis) Measurements: 5 - 6 inches Also known as the Spider Conch.
Taxonomic Information Class GASTROPODA ORTHOGASTROPODA Order CAENOGASTROPODA - SORBEOCONCHA - HYPSOGASTROPODA - LITTORINIMORPHA SuperFamily STROMBOIDEA Family STROMBIDAE Despite the fact that the "conch" shells are not super-shiny, monotonously ovoid in shape, they remain quite popular with the "more discriminating" of collectors.
Their SHAPES are their main attraction, being splendidly variable on this axis, but many have EXCELLENT COLOR as well.
www.stuffnwhatnot.com /?page=shop/flypage&product_id=4083&CLSN_2239=11614533292239cc8b3956b0c2de221a   (208 words)

  
 Freiberger Forschungshefte - Paläontologie, Stratigraphie, Fazies
are considered to represent members of the order Littorinimorpha, while the Stromboidea are present with Pietteia christchurchi n.
In die Vorfahrenschaft der Latrogastropoda unter den Caenogastropoda könnten die Prisciophoridae n.
gehört in die Littorinimorpha, und Pietteia christchurchi n.
www.geo.tu-freiberg.de /psf/contents/00082000/00000005.htm   (658 words)

  
 1 Apr 04
Stem group representatives of the Cerithioidea on one side (for example Ladinulidae and Popenellidae) and the Littorina-Rissoa relation (Littorinimorpha) (for example Prostyliferidae and Coelostylinidae) on the other side appeared.
They can in part be traced through Mesozoic times and connected to modern superfamilies, better in case of the Cerithioidea than in the Littorinimorpha, probably because the last group is rather heterogeneous with the living species and unites quite a diverse lot.
Among the new groups of Caenogastropoda that can be recognized in the late Triassic (mainly St. Cassian fauna) there are also the Purpurinidae, which may represent stem group species leading to groups that had their differentiation much later.
www.mollusckey.com /perth/abstracts2.htm   (15909 words)

  
 WCM 2001 Schedule
Although Neogastropoda are easily recognized on the basis of shell morphology, radular morphology or anatomy of the alimentary system, their relationships to other gastropods are poorly understood.
Some authors have suggested an "archeogastropod" or lower caenogastropod origin for Neogastropoda, while others have advocated various higher caenogastropods ranging from Littorinimorpha to Ficoidea as the likely sister group.
The relationships among higher taxa within Neogastropoda have been particularly difficult to discern due to high rates of homoplasy, especially of some anatomical characters, coupled with incidence of highly derived (autapomorphic) and therefore phylogenetically uninformative characters.
www.univie.ac.at /WCM2001/abstractsf2k.htm   (18510 words)

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