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Sphenotrochus

Milne Edwards and Haime, 1848, p. 240

Type Species

Turbinolia crispa Lamarck, 1816, p. 31, no fig.; Subsequent Designation Milne Edwards and Haime, 1850, p. xvi

Type Specimen: Holotype; ; Not Traced; Dry Preserved

Type Locality: Eocene: sille de Grignon, France

Types not traced but probably in Lamarck Collection at MNHN, Paris

Classification

Synonyms

Diagnosis

Corallum cuneiform, with a rounded base or one with costal spurs (“fishtails”) and a calice elliptical in cross section; GCD up to ; GCD up to 10 mm; theca imperforate; costae independent, smooth to finely granular, often discontinuous; septa hexamerally arranged in 3-4 cycles; pali absent; columella lamellar.

Comparisons

See Turbinolia

Remarks

This genus and family was monographed by Cairns (1997), which included a phylogenetic analysis based on morphology. Thirty-six species, including about 14 Recent, listed by Cairns (1997).

Distribution

  • Western Europe; Eocene
  • Polynesia; Eocene
  • North America; Eocene
  • Western Europe; Oligocene
  • Western Europe; Miocene
  • Australasia; Miocene
  • Caribbean; Miocene
  • Western Europe; Pliocene
  • Australasia; Pliocene
  • Indian Ocean; Recent
  • Western Pacific; Recent
  • Central Pacific; Recent
  • Eastern Pacific; Recent
  • Western Atlantic; Recent
  • Eastern Atlantic; Recent
  • Mediterranean; Recent
  • Subantarctic and Antarctic; Recent
Recent: 7-403 m; FIGURES: Cairns, 1997: figs. 3j. 6a, 8h

This page has been in preparation since 18-Jul-2008 20:29

This version was contributed by Stephen D. Cairns on 19-Nov-2008 20:23.

Page authors are: Stephen D. Cairns. Please contact the editor if you would like to contribute to the diagnosis of this taxon.

The editor is: Stephen D. Cairns


Sphenotrochus gilchristi, Costal granulations near calice
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Sphenotrochus denosus, lateral view
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Lateral view of basal costal region
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Lateral view of unequal-sized costae and intercostae
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See all illustrations