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Deltocyathoides

Yabe and Eguchi, 1932a, p. 389

Type Species

D. japonicus Yabe and Eguchi, 1932a, p. 389, fig. 3; Monotypy

Type Specimen: Holotype; TIUS 50091; Verified; Dry Preserved

Type Locality: Recent:off Japan, 209 m (Soyu Maru-21) (see Yabe and Eguchi, 1937)

A junior synonym of Deltocyathus orientalis Duncan, 1876, not D. australiensis Duncan, 1870 (see Cairns, 1997)

Classification

Diagnosis

Corallum bowl-shaped, circular in cross section, up to 17 mm in GCD; theca imperforate; costae ridged and serrate, originating by trifurcation; septa hexamerally arranged in 4 cycles; P1-3 in 3 crowns; columella papillose.

Comparisons

Similar to and once combined with Peponocyathus, this genus differs in not having transverse division and having serrate costae.

Remarks

This genus and family was monographed by Cairns (1997), which included a phylogenetic analysis based on morphology. Six species, including 2 Recent (Cairns, 1997).

Distribution

  • Australasia; Eocene
  • Australasia; Oligocene
  • Western Europe; Miocene
  • Australasia; Miocene
  • East Asia; Pliocene
  • Indian Ocean; Recent
  • Western Pacific; Recent
  • Western Atlantic; Recent
44-635 m; Figures: Cairns 1997; figs. 1h, 4g

This page has been in preparation since 02-Jul-2008 06:11

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


view of serrate costal ornamentation
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View of costal trifurcation
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Calicular view of corallum
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Lateral view of corallum
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