Otionella Canu & Bassler, 1917

Type species: Otionella perforata Canu & Bassler, 1917

This genus includes the species:

Diagnosis: The zoarium is discoidal (Lunulites form), with neither ovicell nor radicular and hydrostatic zooecia. The vibraculum is interzooecial, unsymmetrical, auriculated, one lip more prominent than the other. The zooecia are hexagonal and disposed in quincunx on the outer face and in radial lines on the inner side. The ancestrula is as large as the other zooecia and of the same form (Canu & Bassler, 1920).

Colonies hollow with basal porous sectors. Ancestrula with one distal, and paired lateral and proximal autozooids. Autozooid opesiae rounded or slightly staighter proximally. Brooding zooids produced late in astogeny, raised distally, with elongated opesiae. Avicularia scatterd, not in distally contiguous series, asymmetrical distally (asymmetry directed to the right, viewed frontally), with one large condyle and large opesia (Cook & Chimonides, 1985)

  1. Otionella auricularia
  2. Canu & Bassler, 1923 Eocene Lutetian-Priabonian USA Alabama WoRMS 1406097
  3. Otionella? parvula
  4. (Canu, 1904) Eocene-Miocene Argentina WoRMS 1412655
  5. Otionella perforata
  6. Canu & Bassler, 1917 Eocene (Lutetian) USA Alabama WoRMS 1406098
  7. Otionella tuberosa
  8. Canu & Bassler, 1920 Eocene (Lutetian) SE. USA WoRMS 1406099
[Otionella parvula] [Otionella perforata] [Otionella tuberosa]
Otionella parvula Otionella perforata Otionella tuberosa

Harmer notebook - entry for Otionella

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Edited by Phil Bock
Modified on 12/08/2016
Modified on 13/6/2020 (Added WoRMS links)
This URL is http://bryozoa.net/cheilostomata/otionellidae/otionella.html