A new genus and six new species of the Parabathynellidae (Bathynellacea, Syncarida) from the Kimberley region, Western Australia Cho, Joo-Lae Park, Jong-Geun Humphreys, W. F. Journal of Natural History 2005 2005-06-28 39 24 2225 2255 Cho & Park & Humphreys, 2005 Cho & Park & Humphreys 2005 [410,814,1367,1391] Malacostraca Parabathynellidae Kimberleybathynella GBIF Animalia Bathynellacea 23 2246 Arthropoda species hexapoda sp. nov.  ( Figures 17–20)  Type material   Holotype: „dissected on three slides, Weber Plains, East Kimberley, Western Australia, Australia, OIA bore WP6 (15 °279530S, 128 °509090E), BES 6361,  12 August 1998, S. M. Eberhardleg. coll. Western Australian Museum, Perth( WAMC 34259).  Allotype: ♀dissected on five slides, same data as holotype ( WAMC 34260).  Paratypes: 9♀♀, same data as holotype ( WAM 34261–34271).  Figure 17.  Kimberleybathynella hexapoda gen. et sp. nov.General habitus ♀, lateral. Scale bar: 0.5 mm.  Etymology The species is named after the presence of six pairs of walking legs in adults.  Description of adults  Size (mm).Body length: „0.90–1.35, ♀1.20–1.45, approximately 12 times as long as wide ( Figure 17). Head as long as length of segments 1–3. The female differs from the male only in thoracopod VIII.  Antennule ( Figure 18A).Antennule six-segmented. Setation as in  K. mandorana.  Antenna ( Figure 18B).Antenna two-segmented, setation as in  K. gigantea.  Labrum ( Figure 18C).Labrum flat, with three median teeth flanked by six main and two additional teeth on both lateral sides. Median teeth terminally denticulated.  Mandible ( Figure 18D).Mandible as in  K. giganteaexcept the incisor process of three teeth.  Maxillule ( Figure 18E).Maxillule two-segmented, ornamentation as in  K. giganteaexcept that the three simple setae on outer distal margin of the distal segment exceed the base of the terminal claws.  Maxilla ( Figure 18F).Maxilla four-segmented. Second segment half fused with third segment; setal formula 2-4-14-1.  Figure 18.  Kimberleybathynella hexapoda gen. et sp. nov.(A) Left A. I „(dorsal); (B) left A. II „(dorsal); (C) Labr. „(ventral); (D) right Md. „(dorsal); (E) right Mx. I „(dorsal); (F) right Mx. II „? (dorsal); (G) left Th. I „(frontal); (H) right Th. II „(frontal); (I) right Th. VIII „(inner lateral, slightly ventral); (J) Th. VIII „(outer lateral); (K) Th. VIII♀ (ventral). Scale bars: 0.1 mm (A–H); 0.05 mm (I–K).  Thoracopods I–VI ( Figures 18I, J, 19A, B, 20A, B).Thoracopods I–VI increasing in length. Thoracopods IV–VI equal in length. Protopodite of thoracopods II–VI each bearing one epipodite. Thoracopods I–VI each bearing one basipodal seta. Exopodite of thoracopods I– VI one-segmented. Exopodite of thoracopod I with two terminal setae. Exopodite of thoracopods II–VI with two terminal setae and with one seta on inner margin. Endopodite of thoracopods I–VI four-segmented, setal formulae: thoracopods I: 1+0/1+1/1+0/3(1); thoracopods II–VI: 0+0/0+1/0+1/2.  Figure 19.  Kimberleybathynella hexapoda gen. et sp. nov.(A) Right Th. III „(frontal); (B) left Th. IV „(frontal); (C) left uropod „(dorsal); (D) pleotelson and furca „(dorsal); (H) pleotelson, furca and uropod „(lateral). Scale bars: 0.1 mm.  Figure 20.  Kimberleybathynella hexapoda gen. et sp. nov.(A) Left Th. V „(frontal); (B) left Th. VI „(frontal). Scale bar: 0.1 mm.  Thoracopod VIII.Thoracopod VIII of male ( Figure 18I, J) hemispherical in lateral view. Protopodite massive. Penial region protruded. Epipodite absent. Basipodite without setae, inner margin of basipodite drawn out into projection. Exopodite triangular, bearing three setae. Endopodite as large as exopodite, denticulated terminally. Thoracopod VIII of female ( Figure 18K) in form of a conical structure resulting from the complete fusion of left and right thoracopods. The conical structure forked to three sharp ends.  First pleomere.First pleomere with a pair of setae.  Uropod ( Figure 19D, E).Uropod bearing six (left) or seven (right) spines on inner distal margin of sympodite. Distal spine 1.5 times as long and thick as proximal spines of equal size. Endopodite 30% as long as sympodite, drawn out distally into slightly curved spur, with two setae at base of spur. Exopodite as long as endopodite, with two terminal setae and one ventromedian seta. Outer one of both terminal setae twice as long as somewhat thicker inner seta.  Pleotelson ( Figure 19C, D).Pleotelson with one seta at base of furcal rami on both sides. Anal operculum flat, protruded slightly.  Furcal rami ( Figure 19C, D).Furcal rami 1.2 times as long as wide, with four (left) or five (right) spines and with two dorsal plumose setae. C 34259 1998-08-12 WAM S. M. Eberhard & Perth Australia Western Australian Museum Weber Plains East Kimberley 23 2246 1 Western Australia holotype C 34260 1998-08-12 WAM S. M. Eberhard & Perth Australia Western Australian Museum Weber Plains East Kimberley 23 2246 1 1 Western Australia allotype C 34259 1998-08-12 WAM S. M. Eberhard & Perth Australia Western Australian Museum Weber Plains East Kimberley 23 2246 WAM 34261-34271 9 9 Western Australia paratype