Hydroides

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 : 40

Non-identified Hydroides juveniles

(1) Non - Hydroides elegans juveniles (i.e., juveniles with primary opercula with collar chaetae that differ from those of H. elegans [ten Hove & Ben-Eliahu 2005]).

Material examined. Suez Canal material reported herein: Hebrew University-Smithsonian Expeditions, 1967–1973: Little Bitter Lake : SBE 1, juvenile, tube rather square in cross-section with lateral ridges, 1 spec.; SLC 117, some of the 109 juveniles with collar chaetae spot-checked for presence of characteristic Hydroides elegans chaetae belonged to a different taxon or taxa. — Great Bitter Lake “Yellow Fleet” Biofouling Samples, January 13–20.1975: 6 subsamples, 7 specs .

Suez Canal depth and substrates: On bivalves, Brachidontes pharaonis and Spondylus spinosus ; on tunicate; under rock.

(2) Hydroides cf. “ priscus ” ( Pillai, 1971)- type juveniles with a secondary opercular form found in several Hydroides taxa (ten Hove & Ben-Eliahu 2005), see Fig. 16 .

Hydroides grubei not Pillai, 1965, sensu Zibrowius 1979b: 133–134 [ France, Toulon Port, biofouling removed from the aircraft carrier “Foch”].

Hydroides “ priscus ”: ten Hove & Ben-Eliahu 2005, figs 4 c, d [Mediterranean Levant coast: Lebanon, Israel: Haifa; Suez Canal; Red Sea, Gulf of Aqaba, Elat; Indian Ocean, Sri Lanka; Indonesia; Australia].

Eastern Mediterranean

Hydroides grubei not Pillai, sensu Zibrowius & Bitar 1981: 159–160 [ Lebanon, Beirut, Zaitouné].

Hydroides cf. priscus- type: Ben-Eliahu & ten Hove 1989: 393 [ Israel] .

Hydroides novaepommeraniae not Augener, 1925, sensu Ben-Eliahu 1991b: 527 [on Mimachlamys varia TAU-MO- 12644 with Serpula concharum , H. elegans , H. diramphus ; spring 1956; det. M.N. Ben-Eliahu.

Indian Ocean

Hydroides “ priscus ”: ten Hove 1994: 108 [Indian Ocean: Seychelles, Sri Lanka].

Material examined. Hydroides grubei not Pillai , sensu Zibrowius & Bitar 1981: 159–160 [ Lebanon, Beirut, Zaitouné, 5 m, on bivalve, 23.IX.1978] .

Suez Canal material reported herein: 2 samples, 3 specimens. Cambridge Expedition “new” sample, from BM (NH) mollusc sample, Lake Timsah, Km 78, Isma’iliya, 1 spec. (App. Table 2A; ten Hove & Ben- Eliahu 2005, fig. 4c).— Hebrew University-Smithsonian Expeditions, 1967–1973: Great Bitter Lake : SLC 117 ( Fig. 16B ), 2 specs (ten Hove & Ben-Eliahu 2005, fig. 4d) .

Suez Canal depth and substrates: 10 m, on bivalve, Pinctada radiata ; on barnacle .

Remarks. The “ Hydroides priscus ” ontogenetic stage with a juvenile secondary operculum containing a funnel and verticil was mentioned in Ben-Eliahu & ten Hove (1989: 393), and again as “ Hydroides novaepommeraniae in Ben-Eliahu (1991b: 527) and Ben-Eliahu & ten Hove (1992: 42, syn. H. grubei ). It is a juvenile ontogenetic stage, and has been documented in several individuals with different mature opercula on the opposite lobe, e.g., in Hydroides homoceros , H. cf. brachyacanthus ( Ben-Eliahu 1991b: 527) , as well as in H. minax , H. cf. albiceps and H. trivesiculosus (ten Hove & Ben-Eliahu 2005) . The first three are Lessepsian migrants ( Ben-Eliahu & ten Hove 1992: 42). Hydroides grubei not Pillai sensu Zibrowius (1979b) could be a juvenile stage of these or other taxa, and thus we excluded it from Zibrowius (1979b) ’s list of species present in biofouling scraped from the aircraft carrier “Foch” (see Discussion Section below). The Great Bitter Lake SLC 117 “ H. priscus ” specimen had sharp pointed teeth in the funnel radii (ten Hove & Ben-Eliahu 2005, fig. 4d) and its bayonet collar chaetae had sharp teeth.

Figures

FIGURE 16. The Hydroides “priscus” juvenile stage of Hydroides sp. / spp. A—From Lake Timsah, Isma’iliya, on bivalve Malvufundus normalis, Cambridge Expedition, 26.XI.1924, BM(NH) 1928.3.30.179, B—From sample Great Bitter Lake SLC 117 (see App. Table 2A, C, respectively). Scale: 100 µm.