Pentaceration globopleonis, Just, Jean, 2011
treatment provided by
Pentaceration globopleonis sp. nov.
Figure 20 View FIGURE 20
Type fixation. Holotype, female, here designated.
Etymology. The epithet is derived from the Latin globosus (= round), and refers to the near circular and roundedly vaulted pleon.
Material examined. Holotype, ovigerous Ƥ, 2.0 mm, Australia, Victoria, South of Point Hicks, 38 o 21.90 'S, 149 o20.00'E, 1000 m, WHOI epibenthic sled, G.C.B. Poore et al, RV Franklin, 23 July 1986, stn SL 32, NMV J 20106 View Materials (with 1 slide).
Paratype (2 specimens). Australia, Tasmania, 48 km ENE of Cape Tourville, 42 o00.25'S, 148 o 43.55 'E, 1264 – 1130 m, gravel with lumps of sandy mud aggregate, WHOI epibenthic sled, G.C.B. Poore et al, RV Franklin, 30 October 1988, stn SL 81, NMV J 20107 View Materials (anterior half of Ƥ). Australia, New South Wales, 54 km ESE of Nowra, 34 o 52.72 'S, 151 o 15.04 'E, 996 - 990 m, mud, fine sand, fine shell, WHOI epibenthic sled, G.C.B. Poore et al, RV Franklin, 22 October 1988, stn SL 53, NMV J 20108 View Materials (1 adult Ƥ).
Description (ovigerous female, holotype). Body tapering towards pleon; width 0.38 length, widest between pereonites 2 and 3. Head length 0.3 width; length posterior to eyestalks 1.26 anterior length. Frontal margin midspine an acute, pointed triangle, length equals mid length of combined pereonites 6 and 7; lateral spines 1.3 length of mid-spine, diverging at 105 °. Rows of regular marginal denticles running from mid spine along anterior margins of lateral spines. Eyestalks overreaching pereonite 1 by about half their length, pointing forward at 25 º, apex rounded.
Pereonite 1 lateral margins rounded; pereonites 2 and 3 lateral spines diverging at 30 °; pereonites 2 and 3 triangular pointed, of equal size, broad at base, length approximately 0.35 pereonite width; pereonite 4 with short, pointed lateral spines; 5 and 6 lateral spines similar to 2 and 3 but narrower; pereonite 7 lateral spines about half length of 6. Pereonite 1 margins and all lateral spines with dense rows of regular small denticles.
Pleon of equal length and width. Pleonite 1 width 0.67 distance between uropods, length 0.2 width. Pleotelson nearly circular, with 18–19 lateral denticles; distal projection triangular at 95 °, 0.27 length of entire pleotelson, apex pointed.
Antennula article 1 approximately 0.9 length of 2, wider than 2, tubular; 2 barely reaching apex of eyestalks.
Antenna article 2 about 3 times length of 1, broad with convex lateral margin; article 3 width one third length, with small blunt spine distolaterally.
Pereopod I basis length 4.0 width, with row of blunt spines anterodistally; ischium 0.55 length of basis; carpus narrowly oval with nearly parallel anterior and posterior margins; propodus narrowing distally to insertion of dactylus, with 2 robust setae on opposing margin.
Pleopod II (operculum) ovoid with bluntly pointed apex, width 0.84 length, with rows of marginal and submarginal simple setae.
Uropods recessed into simple cuticle fold, protopod hidden, exopod protruding with 1 simple seta; endopod length 3 times width.
Size. Largest female, 2.0 mm.
Distribution. South-eastern Australia south of Sydney to eastern Tasmania. 990–1264 m.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.