Ambicholestes (Ambicholestes) magellani ( Just, 1984 )

Just, Jean, 2009, Ischyroceridae *, Zootaxa 2260 (1), pp. 463-486 : 469

Ambicholestes (Ambicholestes) magellani ( Just, 1984)

( Fig. 4 )

Caribboecetes magellani Just, 1984: 57 , figs 1C, 16, 17.

Ambicholestes (Ambicholestes) magellani . — Just, 1998: 32 .

Material examined. 2 females, Zoological Museum, Copenhagen, base of bommies, off Research Point, Lizard Island, 8 m.

Type locality. Mactan Island , Cebu, The Philippines .

Habitat. Coarse sand and coral rubble in 3–33 m depth. Like most other siphonoecetines Ambicholestes magellani occupies foreign objects such as empty mollusc shells ( Fig. 4 ) or polychaete tubes, to the front end of which they add a short tube of fine sand and/or coarse shell debris.

Remarks. Just (1998) reported Ambicholestes magellani from various localities along the Great Barrier Reef from Lizard Island in the north to Heron Island in the south. The species was not found during the present survey. Only Ambicholestes magellani and A. trilobatus Just, 1998 (Elizabeth Reef, north of Lord Howe Island, Tasman Sea) have the anterior margin of the basis of gnathopod 2 lobate. Males as well as females of Ambicholestes magellani differ from A. trilobatus as follows: gnathopod 2 basis with two lobes (three lobes in A. trilobatus ), frontal margin of head broadly rounded in dorsal view (with long, acute rostrum), pleosome and urosome dorsally smooth (densely covered with long and short setules).

Distribution. Australia. Queensland: Great Barrier Reef ( Just, 1998). The Philippines: Cebu ( Just, 1984).

Figures

FIGURE 4. Ambicholestes (Ambicholestes) magellani (Just, 1984), female, habitus and a second female in abode, Zoological Museum, Copenhagen. Both off Research Point, Lizard Island, Great Barrier Reef. H dv, Head in dorsal view; G2 bas, bilobed basis of gnathopod 2.