Deltocyathus parvulus Keller, 1982

Cairns, Stephen D., Häussermann, Verena & Försterra, Günter, 2005, A review of the Scleractinia (Cnidaria: Anthozoa) of Chile, with the description of two new species, Zootaxa 1018 (1), pp. 15-46 : 36

Deltocyathus parvulus Keller, 1982

Fig. 2I

Deltocyathus parvulus Keller, 1982: 47–51 , map 1, pl. 3 (misnumbered as second pl.1, captions to plates mixed), figs. 3–16 (not 17).

New Record. — Anton Bruun 17­674G, 24°24'S, 80°47'W, 4195 m, 11 July 1966, 1 damaged specimen, USNM 1021993 .

Remarks. —One small (6.2 mm in CD) damaged specimen is reported from the abyssal plain off the Miriam Spur of the Nazca Ridge off northern Chile. It is characterized by having a strongly conical­shaped corallum, four cycles of septa, rudimentary S4, and tuberculate columellar elements. It was previously reported from the eastern Pacific from the abyssal plain of the Peru Basin off southern Peru at 4620 m ( Keller 1982). It is also reputed to occur in the western Pacific at depths of 1940–5080 m ( Keller 1982), making it the deepest living species of Deltocyathus as well as one of the deepest living scleractinian species.

Figures

FIGURE 2. A–C, Caryophyllia huinayensis (A, paratype, USNM 1021991; B–C, holotype, ZSM 20050146): A, stereo view of calice, x 5.3; B, calicular view, x 5.3; C, lateral view of corallum, x 4.5; D–E, Caryophyllia diomedeae, USNM 83522, calicular and lateral views, x 3.0, x 2.0, respectively; F, H, Tethocyathus endesa (F, holotype, ZSM 20050148; H, paratype, USNM 1021980): F, stereo calicular view, x 5.2; H, calicular view, x 4.9; G, Caryophyllia sp. cf. C. quadragenaria, USNM 1021992, calicular view, x 7.3; I, Deltocyathus parvulus, USNM 1021993, oblique calicular view, x 6.1; J, Solenosmilia variabilis, USNM 1022415, colony fragment, x 0.75. Scale bars for A–C, F–I = 2 mm; D–E = 5 mm; J = 2 cm.