Ibacus brucei

Holthuis, 1977

Diagnosis:
Anterior margin of wide cervical incision of carapace forming posterior margin of anterolateral angle of carapace; carapace shows no lateral margin between anterolateral angle and cervical incision. Carapace has seven or eight posterolateral teeth. Dorsal surface of body naked to unaided eye, with microscopically small, scattered setae.
Fourth segment of antenna not slender, at first widening in lateral direction before narrowing into apex, with distinct lateral margin, provided with well-developed teeth. Merus of third maxilliped with ventral surface slightly concave, not swollen, and not coloured differently from other segments; inner margin not with deep incisions.

Type:
Type locality: "Due east of Point Lookout, North Stradbroke Island, Queensland; 86 fathoms ( = 157 m)". Male holotype in RMNH, no. D 24744.

Geographical Distribution:
Australia (Queensland, New South Wales) and New Zealand (Kermadec Islands ).

Habitat and Biology:
Depth range from 90 to 183 m; substrates soft with stones

Size:
The carapace length of the known specimens varies between 2 and 5.7 cm; the maximum total body length being about 13 cm.

Interest to Fisheries:
So far none. As the species lives on trawlable grounds (all the types were obtained by trawl), it might be possible that, if the right fishing grounds are found, the species could become commercially important.

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