(Crustacea, Anomura), with Further Notes on its Type-Species With 1 Text-figure

ABSTRACT A new genus of the Crustacea Galatheidae, Coralliogalathea, is established for Galathea humilis Nobili, 1905. It is distinct from the allied genus Galathea in having 1) the first pleopod of male absent, 2) the rostrum with three lateral teeth on each side, 3) the third thoracic sternite anteriorly produced like a beta! leaf, and 4) the second segment of antenna unarmed at the inner distal margin. The large genus Galathea of the anomuran Crustacea is revised in the previous papers (Baba, 1969, 1971), in which are established five new genera, Liogalathea, Allogalathea, Phylladiorhynchus, Sadayoshia and Lauriea. At the time of those publications, another aberrant group represented by Galathea humilis Nobili was considered to form a different genus, though any specimen of this species was not available. In the meantime several specimens of the anomuran have come to the present authors ' hands together with further informations on ecology and colour. On close examination it was confirmed that this aberrant form should be placed in another new genus, here proposed as Coralliogalathea gen. nov. Coralliogalathea gen. nov. Diagnosis. Rostrum broad at base, with three lateral teeth of small size. Outer orbital angle pyramidal. Abdominal segments smooth without dorsal spines. Tail fan moderately developed; endopod normal. Eyestalk short, distally not swollen. 61 62 K. BABA and W. JAVED Thoracic sternite bearing third maxillipeds anteriorly produced like a betal leaf. Antennular basal segment globular, more or less depressed, with three distal spines. Basal segment of antennal peduncle with an inner distal marginal spine developed; second segment unarmed at inner distal margin, armed with a distinct spine at outer distal margin. Third maxilliped not so well developed; merus triangular in cross section with a normal row of denticles on inner cutting edge. First pleopod of male absent