Panathura hamelini Poore, Lew & Ton, 2002, n. sp.
Creators: name: Poore, Gary C. B.
name: Lew, Helen M.
name: Ton
Publisher: name: Zenodo
Year: 2002
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Isopoda
Expanathuridae
Panathura
Panathura hamelini

description: Panathura hamelini n. sp. (Figs 26 & 27)
Material examined.– Holotype. Australia. Tasmania, Spiky Bridge Coastal Reserve, 8 km S of Swansea reef in small bay below Spiky Bridge (42°08'S, 148°08'E), 2 m, Caulerpa and trapped sand, G.C.B. Poore and H.M. Lew Ton, 21 Mar 1988 (stn TAS 75), NMV J17202 (ovigerous female, 3.8 mm, 2 slides).
Description: Ovigerous female. Head little longer than wide, with obscure broad rostrum, with 3 pairs of lateral setules; eyes dorsal. Pereonites of equal width, 3 the longest and 7 0.7 length of pereonite 6. Pleonites 1–4 of approximately equal length, 5 twice as long, 6 longer, 1–5 about as long as pereonite 6, pleotelson longer than pereonites 6–7; pleonite 4 with c. 10 marginal plumose setae laterally on epimeron, pleonite 5 with c. 20 marginal plumose setae laterally. Telson base 0.7 width of widest point, halfway along, dorsally concave, apex evenly rounded; telson and inner surfaces of uropodal rami with scattered setules and telson apex with medial pair of short setae and, on each side, 4 longer setae.
Head, pereon and pleonites 1–6 with scattered dorsal brown pigment patches.
Antenna 1 peduncle with stout article 1, narrower articles 2 and 3; flagellum shorter than last peduncle article, of short article 1 with pappose seta, article 2 narrow and with 2 aesthetascs. Antenna 2 peduncle longer than antenna 1, article 2 not produced, articles 3 and 4 short, 5 longer than wide; flagellum of 1 long article and 4 smaller articles.
Mouthparts as in P. baudini.
Pereopod 1 subchelate, with proximal articles stout as in pereopods 2 and 3, stronger than in more posterior limbs; carpus triangular, with 3 setae on posterior margin; propodus 1.7 times as long as wide, palm axial, irregular, with 3 setae, mesial face with 3 setae, 1 stronger; dactylus weakly closing on palm, unguis almost half its length. Pereopod 2 merus cupping triangular carpus; carpus not reaching anterior margin, with weakly setose posterior margin; propodus weakly swollen, palm irregularly toothed, with distal spiniform seta, few palmar fine setae. Pereopod 3 similar to pereopod 2. Pereopods 4–6 similar; carpus short and trapeziform; carpus with 2 short spiniform setae on posterior margin; propodus with 1 distal short spiniform seta and few finer setae; dactylus weakly curved, unguis one­third length. Pereopod 7 carpus and propodus longer than in more anterior pereopods; propodus with 2 spiniform setae on posterior margin, plus 2 anterodistal double­pectinate setae.
Oostegites on pereopods 2–5.
Pleopods similar to P. baudini. Uropodal endopod longer than peduncle, reaching near to end of telson; endopod 1.3 times as long as wide, distally and laterally setose; exopods overlapping in midline, 1.7 times as long as wide, with negligible marginal excavation, posteriorly almost truncate, 16 marginal setae well spaced.
Juvenile and male. Unknown.
Size: Unique ovigerous female, 3.8 mm.
Distribution: Tasmania; algal community, 2 m depth.
Etymology: For Emmanuel Hamelin, Captain of Le Naturaliste, one of two French ships that spent 1801–1804 exploring in southern Australian waters.
Remarks: Panathura hamelini n. sp. is distinguished from the other more common coloured species from southern Australia, P. hicksi n. sp., by the more oval shape of the telson.
description: Published as part of Poore, Gary C. B., Lew, Helen M. & Ton, 2002, Expanathuridae (Crustacea: Isopoda) from the Australian region, pp. 1-60 in Zootaxa 82 on pages 43-46, DOI: 10.5281/zenodo.155831