Arcitalitrus Hurley, 1975: 161 Friend, 1987: 35 The Amphipod Genus Arcitalitrus (Crustacea: Amphipoda: Talitridae) of New South Wales Forests, With Descriptions of Six New Species R Peart Records of the Australian Museum 2006 58 97 118 7NPLM Hurley Hurley 1975 [995,1220,190,214] Malacostraca Arcitalitridae Arcitalitrus Animalia Amphipoda 1 98 Arthropoda genus      Arcitalitrus Hurley, 1975: 161.–  Friend, 1987: 35.    Typespecies.  Talitrus sylvaticus Haswell, 1879, original designation.   Diagnosis. Gnathopod 2 not sexually dimorphic. Maxilliped outer plate distally acute/arcuate. Pleopods 1 and 2 well developed, pleopod 3 reduced.  Species composition.  Arcitalitruscontains nine species:  Ar. bassianus Friend, 1987;  Ar. belbucca n.sp.;  Ar. bundeena n.sp.;  Ar. dorrieni( Hunt, 1925);  Ar. moonpar n.sp.;  Ar. nana n.sp.;  Ar. orara n.sp.;  Ar. sylvaticus( Haswell, 1879);  Ar. thora n.sp.   Key to the species of the genus  Arcitalitrus1 Epimeron 3 posteroventral margin serrulate ...............................................  Arcitalitrus bassianus —— Epimeron 3 posteroventral margin smooth ................................................................................... 2 2 Epimeron 2 subequal in length to epimeron 3 ............................................................................... 3 —— Epimeron 2 longer than epimeron 3 .............................................................................................. 6 3 Gill 6 anterior margin convoluted, subapically incised ................................................................. 4 —— Gill 6 posterior margin convoluted, apically incised ..........................................  Arcitalitrus thora4 Pleopod 3 rami absent .................................................................................................................... 5 —— Pleopod 3 uniramous ............................................................................................  Arcitalitrus nana5 Telson entire ........................................................................................................  Arcitalitrus orara —— Telson apically incised .................................................................................  Arcitalitrus sylvaticus—— Telson deeply incised .....................................................................................  Arcitalitrus belbucca 6 Epimeron 3 posteroventral corner with subacute tooth ...............................  Arcitalitrus bundeena —— Epimeron 3 posteroventral corner rounded ...................................................  Arcitalitrus moonpar—— Epimeron 3 posteroventral corner subquadrate ..............................................  Arcitalitrus dorrieni