New brachiopod subfamily Anechophragmiinae (Strophomenida) from the Ordovician of the Leningrad Region

@article{Madison2013NewBS,
  title={New brachiopod subfamily Anechophragmiinae (Strophomenida) from the Ordovician of the Leningrad Region},
  author={Anna A. Madison},
  journal={Paleontological Journal},
  year={2013},
  volume={47},
  pages={23-35}
}
  • A. Madison
  • Published 3 February 2013
  • Biology
  • Paleontological Journal
A new strophomenid subfamily Anechophragmiidae is distinguished based on the peculiarities of cardinalia. The strophomenids of this subfamily lack cardinal process at all developmental stages; their socket ridges accrete and form a high plate, which closes the pedicle opening. Two genera are referred to the subfamily: Anechophragma Neuman, 1976 and Biseptata gen. nov. with new species B. briani sp. nov. from the Ordovician of the Leningrad Region. The shell structure, exterior, endoskeleton and… 
Morphology and ontogeny of some Middle Ordovician gonambonitid brachiopods from Baltoscandia
TLDR
The Volkhovian–Kunda boundary deposits of the Leningrad Region contain two closely related genera, Antigonambonites and Anchigonites, which share similar developmental and morphological features, and ecological strategies including the attachment by cementation by a “pedicle tube” and are thus possibly phylogenetically related.
Formation of cardinal process in Ordovician strophomenids
The cardinalia of strophomenids Lynnica fragilis gen. et sp. nov. and Sowerbyella (Sowerbyella) liliifera Öpik, 1930 from the Ordovician of the Leningrad Region are described in detail for different

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The cardinalia of strophomenids Lynnica fragilis gen. et sp. nov. and Sowerbyella (Sowerbyella) liliifera Öpik, 1930 from the Ordovician of the Leningrad Region are described in detail for different
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