Sympagurus planimanus (De Saint Laurent, 1972

Lemaitre, R., 1996, Hermit crabs of the family Parapaguridae (Crustacea: Decapoda: Anomura) from Australia: species of Strobopagurus Lemaitre, 1989, Sympagurus Smith, 1883 and two new genera., Records of the Australian Museum 48 (2), pp. 163-221 : 185-186

Sympagurus planimanus (De Saint Laurent, 1972 )

Parapagurus planimanus De Saint Laurent, 1972: 109 , figs 4, 22 (type locality: Indonesia, Flores Sea, Siboga Exp., sta. 45).

Sympagurusplanimanus.- Lemaitre, 1989: 37; 1994: 387, figs 9, 10.

Holotype. Male (SL 6.3 mm), Indonesia, Flores Sea, Siboga Exp., sta. 45, 07°24'S, 118°15.2'E, 794 m, 6 Apr 1899, ZMA Del03.111.

Australian material. WESTERN AUSTRALIA: 1 male (SL 5.7 mm), W of Cape Leveque, FRV Soela, 01184/091, 16°08'S, 120019.5'E, 550- 544 m, 18 Feb 1984, coil. S. Slack-Smith, WAM 1096 -86.

Other material. (For meaning of asterisks see Materials and Methods). INDONESIA: I male (SL 5.1 mm), I female (SL 4.4 mm), Borneo, Sibuko Bay, off Mabul Is., Albatross, sta. 5590, 04°1O'50"N, 118°39'35"E, 567 m, 29 Sep 1909, USNM 168950*. 2 males (SL 5.0- 5.6 mm), Borneo, Sibuko Bay, off Sipadan Is., Albatross, sta. 5586, 04°06'50"N, 118°47'20"E, 635 m, 28 Sep 1909, USNM 168949*. 3 males (SL 3.5-5.5 mm), I female (SL 3.6 mm), Molucca Passage, off Maren Is., Albatross, sta. 5618, 00037'N, 127°15'E, 763 m, 27 Nov 1909, USNM 168951*. 26 males (SL 3.1 -6.1 mm), 20 females (SL 3.7-5.1), 16 females ovig. (SL 3.6- 5.1 mm), same station data as holotype, ZMA DeI03.110*.

Diagnosis. First 11 pairs of gills trichobranchiate. Shield as long as broad; dorsal surface weakly calcified medially; rostrum broadly rounded, with low dorsal ridge; anterior margin straight; lateral projections broadly subtriangular, terminating bluntly; ventrolateral margin usually with small spine; posterior margin broadly rounded. Ocular peduncles more than half length of shield; ocular acicles subtriangular, terminating in strong spine; corneae slightly dilated. Sternite of 3rd maxilliped with small spine on each side of midline. Epistomial spine absent. Antennular peduncle exceeding distal margin of corneae by length of penultimate segment. Antennal peduncle at most exceeding distal margin of cornea by 0.25 length of 5th segment; 4th segment with dorsolateral distal spine; 3rd segment with strong ventromesial distal spine; 2nd segment with dorsolateral distal angle produced, terminating in strong spine; acicles reaching distal margin of corneae, mesial margin armed with 7 to 10 spines; flagellum with numerous setae 1 to 3 flagellar articles in length. Chelipeds dissimilar, with moderately dense setation. Right cheliped with chela less than twice as long as wide, fingers strongly curved ventromesially, dactyl with concave ventromesial face; dorsal and ventral faces of palm smooth; palm with dorsomesial and dorsolateral margins well delimited by row of spines, and rounded mesial face; carpus with numerous small tubercles or spines on dorsal surface. Left cheliped with chela unarmed, usually well calcified; carpus with dorsodistal spine. Ambulatory legs reaching to tip of extended right cheliped; dactyl about twice as long as propodus, with ventromesial row of about 5 well spaced corneous spinules, and dorsal and dorsomesial rows of long bristle-like setae; carpus with small dorsodistal spine. Anterior lobe of sternite of 3rd pereopods unarmed. Fourth pereopod with long, curved corneous claw in large females (shield length> 4.0 mm); propodal rasp consisting of 1 row of ovate scales. Uropods and telson markedly asymmetrical; telson with weak median cleft separating anterior and posterior lobes; posterior lobes separated by broad shallow sinus, terminal margins armed with corneous spines. Male 1st gonopods each with concave distal lobe; 2nd gonopods each with distal segment nearly flat. Females with vestigial right 2nd pleopod.

Distribution. Western Pacific: South China Sea; Indonesia; and Australia. Depth: 100 to 794 m.