Acamptogenotia

Acamptogenotia is an extinct genus of predatory sea snails, marine gastropod mollusks belonging to an unassigned family in the Conoidea.[3]

Acamptogenotia
Temporal range: Paleocene-Pliocene
Fossil shell of Acamptogenotia intorta
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Caenogastropoda
clade Hypsogastropoda
clade Neogastropoda
Superfamily:
Conoidea
Family:
(unassigned) Conoidea
Genus:
Acamptogenotia

Rovereto, 1899
Type species
Pleurotoma intorta Brocchi, 1814
Synonyms

Pseudotoma Bellardi 1875 [1][2]

First appearing 48.6 Ma and believed to go extinct 7.246 Ma. Specimens of the Acamptogenotia have been found in Austria, Denmark, Germany, The Netherlands, The UK, and The continental United States. The Acamptogenotia lived during the Paleocene epoch of Denmark and Greenland, The Oligocene epoch of Mexico, and in the Pliocene epoch of Italy

Description

The ovate, fusiform, shell is short and stout. The spire is about the length of the aperture. The columella is straight, very short, axis impervious. The siphonal canal is very short and wide. The anal sulcus is wide, moderately deep, close to the suture. The spiral sculpture is feeble. The axial sculpture consists of moderately strong riblets. The operculum is wide, ovate, with apical nucleus. Type Pleurotoma intorta Brocchi, 1814 [4]

Species
  • Acamptogenotia alazana (Cooke 1928) † [1][3]
  • Acamptogenotia heilprini Aldrich 1885 † [1][3]
  • Acamptogenotia intorta Brocchi 1814 † [1][5]
gollark: This is kind of tricky to reason about since obviously time travel breaks causality, which means we can't really ask "given some universe state, what happens next", but still.
gollark: Sophonts are defined as nondeterministic in some way, right? Presumably you could, though, force them to make a particular decision by making it the only consistent one. Or does the universe just proactively not allow that kind of situation?
gollark: Vaguely relatedly, how do the self-consistency things interact with the universe's enforced free will?
gollark: The simplest self-consistent result of any form of time travel existing is that you just never use it ever.
gollark: Would it be convention to say "exactly one of the cats is sleeping" if you meant the English thing, then?

References
  1. Palaeos
  2. GBIF
  3. Fossilworks
  4. W.H. Dall (1908) Reports on the Mollusca and Brachiopoda, Bulletin of the Museum of Comparative Zoology at Harvard College. vol. 43
  5. Fossiles
  • Bouchet, P., J.-P. Rocroi, J. Frýda, B. Hausdorf, W. Ponder, Á. Valdés & A. Warén. 2005. Classification and nomenclator of gastropod families. Malacologia 47 (1-2): 1-397.
  • Powell, A. W. B. 1966. The molluscan families Speightiidae and Turridae: An evaluation of the valid taxa, both Recent and fossil, with lists of characteristic species. Bulletin of the Auckland Institute and Museum 5: 1-184, pl. 1-23.
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