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Cyathotrochus

Bourne, 1905, p. 192

Type Species

Cyathotrochus herdmani Bourne, 1905, p. 193, pl. 1, fig. 2; Monotypy

Type Specimen: Holotype; ; Not Traced; Unknown

Type Locality: Recent: off Ceylon (Gulf of Manaar, west of Periya Paar), depth not given

Probably a junior synonym of C. pileus (Alcock, 1902c)(see Cairns, 1997), the latter species well described by Cairns (1989: 34).

Classification

Diagnosis

Corallum cuneiform , with a rounded base and elliptical in cross section; GCD up to 25 mm; theca imperforate; costae independent, ridged and serrate; septa hexamerally arranged in 4-5 cycles; pali present before all but last septal cycle (P1-3, 4); columella papillose to sublamellar.

Comparisons

Differs from Tropidocyathus by having ridged serrate independent costae and lacking alata edge costae.

Remarks

This genus and family was monographed by Cairns (1997), which included a phylogenetic analysis based on morphology. Four species: 2 Recent and two fossil (see Cairns, 1997). See Cairns (2004) for generic synonymy.

Distribution

  • Polynesia; Miocene
  • East Asia; Pleistocene
  • Indian Ocean; Recent
  • Western Pacific; Recent
Recent: 123-522 m; Figures: Cairns 1997: fig. 1g, 4f

This page has been in preparation since 08-Oct-2008 15:21

This version was contributed by Stephen D. Cairns on 18-Nov-2008 20:06.

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


Cyathotrochus pileus,edge view
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Cyathotrochus pileus, side view
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Cyathotrochus pileus, calicular view
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Lateral view of corallum
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See all illustrations