Pentaceration globopleonis Just, 2011, sp. nov.
Creators: name: Just, Jean
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Isopoda
Paramunnidae
Pentaceration
Pentaceration globopleonis

description: Pentaceration globopleonis sp. nov.
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, 38o21.90'S, 149o20.00'E, 1000 m, WHOI epibenthic sled, G.C.B. Poore et al, RV Franklin, 23 July 1986, stn SL32, NMV J20106 (with 1 slide).
Paratype (2 specimens). Australia, Tasmania, 48 km ENE of Cape Tourville, 42o00.25'S, 148o43.55'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 SL81, NMV J20107 (anterior half of Ƥ). Australia, New South Wales, 54 km ESE of Nowra, 34o52.72'S, 151o15.04'E, 996- 990 m, mud, fine sand, fine shell, WHOI epibenthic sled, G.C.B. Poore et al, RV Franklin, 22 October 1988, stn SL53, NMV J20108 (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 25º, 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.
description: Published as part of Just, Jean, 2011, Remarkable Australasian marine diversity: 18 new species in Pentaceration Just, 2009 (Crustacea, Isopoda, Paramunnidae), pp. 1-54 in Zootaxa 2813 on page 29, DOI: 10.5281/zenodo.203856