Archinacellidae
Encyclopedia
Archinacellidae is an extinct family
Family
In human context, a family is a group of people affiliated by consanguinity, affinity, or co-residence. In most societies it is the principal institution for the socialization of children...

 of paleozoic molluscs of uncertain position (Gastropoda
Gastropoda
The Gastropoda or gastropods, more commonly known as snails and slugs, are a large taxonomic class within the phylum Mollusca. The class Gastropoda includes snails and slugs of all kinds and all sizes from microscopic to quite large...

 or Monoplacophora
Monoplacophora
Monoplacophora, meaning "bearing one plate", is a polyphyletic class of mollusks with a cap-like shell, living on the bottom of deep sea. Extant representatives were unknown until 1952; previously they were known only from the fossil record.- Definition :...

).

Taxonomy

The taxonomy of the Gastropoda by Bouchet & Rocroi, 2005
Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005)
The taxonomy of the Gastropoda as it was revised by Philippe Bouchet and Jean-Pierre Rocroi is currently the most up-to-date overall system for classifying gastropod mollusks...

 categorizes Archinacellidae in the superfamilia Archinacelloidea
Archinacelloidea
†Archinacelloidea is an extinct superfamily of paleozoic molluscs of uncertain position ....

 within the
Paleozoic molluscs of uncertain systematic position. This family has no subfamilies.

Genera

Genera in the family Archinacellidae include:
  • Archinacella Ulrich & Scofield, 1897 - type genus
    Type genus
    In biological classification, a type genus is a representative genus, as with regard to a biological family. The term and concept is used much more often and much more formally in zoology than it is in botany, and the definition is dependent on the nomenclatural Code that applies:* In zoological...

     of the family Archinacellidae
    • Archinacella powersi Ulrich & Scofield, 1897 - type species
    • Archinacella instabilis (Billings
      Elkanah Billings
      Elkanah Billings is often referred to as Canada's first paleontologist. Billings was born on a farm by the Rideau River outside Bytown, now known as Billings Estate. His parents were named Lamira and Braddish Billings. His family included an older sister named Sabra and an older brother Braddish II...

      , 1865)
  • Barrandicella Peel & Horný, 1999
  • Barrandicellopsis Horný, 2000
    • Barrandicellopsis ovata - synonym: Archinacella ovata Barrande
      Joachim Barrande
      Joachim Barrande was a French geologist and palaeontologist.Barrande was born at Saugues, Haute Loire, and educated in the École Polytechnique at Paris...

       in Perner, 1903 - Archinacella ovata var. elevata Barrande in Perner, 1903 - type species, Middle Ordovician from Bohemia
    • Barrandicellopsis extenuata - synonym: Orthonychia extenuata Barrande in Perner, 1903 - probably belongs to genus Barrandicellopsis, Middle Ordovician from Bohemia

External links

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