Hydroides dipoma ( Schmarda, 1861 )

Ben-Eliahu, M. Nechama & Ten Hove, Harry A., 2011, Serpulidae (Annelida: Polychaeta) from the Suez Canal- From a Lessepsian Migration Perspective (a Monograph) 2848, Zootaxa 2848 (1), pp. 1-147 : 16-17

Hydroides dipoma ( Schmarda, 1861)

Not present in the Suez Canal, but in nearby Suez harbour fouling.

Eupomatus dipoma Schmarda, 1861: 29 , pl. 61, fig. 177 [Type locality: South Africa, Cape of Good Hope ].

Eupomatus spinosus Pixell 1913: 78 , pl. 8, fig. 5 [Type locality: Suez].

Hydroides uncinata var. macronyx Ehlers, 1913: 582–583 , pl. 46, figs 1–2 [South east Atlantic: South Africa, Simonstown].

Hydroides dipoma: Zibrowius 1973b: 33–35 , figs 4 f, g [redescription, synonymy; from Río de Oro, Morocco to Cape of Good Hope, intertidal and subtidal; Suez].

Gulf of Suez

Eupomatus spinosus Pixell, 1913: 78 , pl. 8, fig. 5 [Suez, see “Material examined”].

Material examined. Locations adjacent to the Suez Canal, Mediterranean side: None.

Suez Canal proper: No records.

Locations adjacent to the Suez Canal, Red Sea side: Egypt: 2 lots. Gulf of Suez , Suez, C. Crossland, details concerning substrate or habitat not available, det. H.L.M. Pixell Eupomatus spinosus, BM(NH) 1924:6 :13:135, 2 specs ; syntypes of Eupomatus spinosus Pixell, 1913 , donated J.S. Gardiner, BM (NH) 1938:7:25:9–12, 4 specs .

South Africa, legit W. Stephensen 11.VI.1932, det. H. Zibrowius 1972, Hydroides spinosus, BM(NH) 1932.12.23.20, 1 spec. ; Cape Peninsula, shore, Stn CP 138, legit, presented and det. J.H. Day H. dipoma, BM(NH) 1963.1.175, 1 spec.

Distribution. Atlantic Africa: Río de Oro, Morocco to the Cape of Good Hope; Suez.

Remarks. Pixell (1913: 78) reported Hydroides dipoma (as Eupomatus spinosus ) from Suez. Zibrowius (1973b: 36) commented on the species’ disjunctive distribution, from the length of the south east Atlantic coast, without additional records from the Mediterranean or from the Indian Ocean or Red Sea; and with a single Indo-West-Pacific location, Suez. We agree with him that it is likely that the record at Suez is due to a ship-borne introduction. We have not enumerated Hydroides dipoma among the species reported from the Canal. However, due to the proximity of Suez to the southern opening of the canal, we would not be surprised if it were to be found in the canal.