Ochlesis alii J.L. Barnard, 1970: 220 Barnard, 1971: 105 Ochlesidae * Coleman, Charles Oliver Zootaxa 2009 2009-10-08 2260 1 741 745 48CY7 J. L. Barnard, 1970 J. L. Barnard 1970 [151,543,290,316] Malacostraca Ochlesidae Ochlesis Animalia Amphipoda 1 742 Arthropoda species alii  ( Figs 1, 2, Pl. 5A, B)      Ochlesis aliiJ.L. Barnard, 1970: 220, figs 144–145. ―J.L.  Barnard, 1971: 105, fig. 53.   Material examined.2 unsexed, AMP78872 ( JDT/ LIZ14);  2 males, AMP78873 ( JDT/ OPH 2); 1 juvenilefemale,  1 male, AMP71480 ( QLD 1823); male, 2.0 mm, female, 3.1 mm, AMP70899 ( QLD 1687);  1 male, AMP70906 ( QLD 1687);  1 female, AMP70833 ( QLD 1687).    Typelocality. Off Ewa Beach, Oahu, Hawaii, North Pacific Ocean(~ 21°19’N 158°0’W) with  Pocilloporaand bryozoans.   Description.Based on male, 2.0 mm, AM P70899.  Head. Headlaterocephalic margin with an acute spine, lateroventral corner narrowly rounded; rostrum normal. Antenna 1peduncular article 1 with posterodistal spine, spine shorter than peduncular article 2; peduncular article 2 short, about 1.11 x as long as broad, with posterodistal spine, spine much longer than peduncular article 3; peduncular article 3 posterior margin not deeply telescoped into article 2. Antenna 2longer than peduncular article 1 of antenna 1; peduncular article 4 posterodistal spine present, spine longer than half length of article 5. Mandiblemolar reduced, triturating. Maxilla 1palp reduced, 1–articulate, with a short apical seta. Maxillipedpalp absent.  Pereon. Pereonwith sharply raised carina forming a dorsal keel. Pereonite 1enlarged, longer than pereonite 2. Pereonite 7with a small apically acute dorsodistal spine. Gnathopod 1coxa curved anteriorly, distally rounded; carpus not elongate, less than 2 x propodus length. Gnathopod 2coxa distally subacute to acute, anteroproximal margin straight; carpus distal lobe shorter or equal to half the propodus length. Pereopod 3coxa distally rounded, anteroproximal margin straight to weakly produced. Pereopod 4coxa distal margin subacute, anteroproximal margin straight to weakly produced. Pereopod 5coxa not anteriorly produced, anterior margin truncated, straight, posterodistal corner subquadrate. Pereopod 6coxa posterodistal corner subquadrate. Pereopod 7coxa subequal in length to coxa 6.  Pleon. Pleonite 1with small apically subquadate dorsodistal carina. Pleonite 2with a small apically rounded dorsodistal carina. Pleonite 3with a shallow apically rounded mid-dorsal carina. Epimeron 1posteroventral corner rounded. Epimeron 2posteroventral corner subquadrate to rounded. Epimeron 3posteromedian corner acute, posteroventral margin not excavate, ventral margin broadly rounded. Uropod 3biramous. Telsonmedium length, 1.8 x as long as wide, apically acute.  Female(sexually dimorphic characters). Based on female, 3.1 mm, AM P70899. Antenna 1peduncular article 2 long, about 1.25 x as long as broad. Gnathopod 2coxa distally rounded, anteroproximal margin produced. Pereopod 3coxa distally obliquely truncated, anteroproximal margin strongly produced. Pereopod 4coxa distal margin rounded or subacute, anteroproximal margin strongly produced. Pereopod 5coxa anteriorly produced, tapering, distally subacute, posterodistal corner broadly rounded. Pereopod 6coxa posterodistal corner broadly rounded. Epimeron 1posteroventral corner subquadrate.  Habitat.Shallow reef flat and in channel between outer barrier reefs, amongst rubble and mixed coralline algae and epiphytes.   Remarks.The examined material from Lizard Island and Orpheus Island is very similar to  Ochlesis aliiJ.L. Barnard, 1970, described from Hawaii. Even the coloured patches on the dorsal keel, the bands on the appendages and the coloured tips of antenna 1 and 2, illustrated by J.L. Barnard (1970, 1971), can be found on the Australian material. There are only a few differences in this material compared with J.L. Barnard's (1970)description: the angle of the laterocephalic process is smaller and thus more acute; the processes on the peduncular articles 1 and 2 of antenna 1 and of peduncular article 4 of antenna 2 are longer and the telson is narrower.   Distribution.  Australia. Queensland: Lizard Island, Orpheus Island (current study).  USA. Hawaii: Oahu (J.L. Barnard 1970). P78873 [877,1303,462,488] AM, JDT 1 742 OPH 2 2 2 P71480, P70899 [246,1337,501,527] AM 1 742 QLD 1823, QLD 1687 1 1 P70906 AM 1 742 QLD 1687 1 1 P70833 [463,880,540,566] AM 1 742 QLD 1687 1 1 Off Ewa Beach 21.316668 North Pacific Ocean 1264 -158.0 Oahu 1 742 1 Hawaii holotype