Austronanus glacialis Hodgson 1910

• Main Authors: Just, Jean, Wilson, George D. F.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2006
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Isopoda; Paramunnidae; Austronanus; Austronanus glacialis; Armitage; Cape Armitage; Cape Royds; Hodgson; McMurdo Sound; Ross Island; Royds; Winter Quarters Bay; Antarc*; Antarctica
• Online Access: https://zenodo.org/record/6254981; https://doi.org/10.5281/zenodo.6254981

Austronanus glacialis Hodgson, 1910 (Figs 2–5) Austronanus glacialis Hodgson, 1910: 50, pl. 8, fig. 3. Not Paramunna serrata (?).– Nordenstam, 1933: 234; Amar & Roman, 1974: 577. Type fixation. Holotype, manca, by monotypy, NHM 1910.3. 18.95. Remarks on type material. The holotype is a small unnaturally flattened specimen, apparently manca stage 1 (no development of pereopod VII); surfaces are covered with detritus and crystals, but can be seen to be smooth with little or no setation. Type Locality. McMurdo Sound, Antarctica. Material examined Holotype. Manca, 0.7 mm, Winter Quarters, McMurdo Sound, Antarctica, inside 20 fms line [36.5 m], dredge, ii. 1902, 'Discovery' coll., NHM 1910.3. 18.95. Other material. Ross Island, McMurdo Sound, Antarctica (positions estimated from map): Winter Quarters, 77 ° 50.7 'S 166 ° 39 'E, inside 25 fms line [45 m], 'Discovery' coll., NHM 2005.2086 (ovigerous Ψ A, 1.52 mm); Cape Royds, 77 ° 30 'S 166 ° 10 'E, J. Oliver, 13 Oct. 1974, AM P 67051 (preparatory Ψ); Winter Quarters Bay "Dump", J. Oliver, 9 Sept. 1974, AM P 67052 (ɗ B, 1.23 mm, plus 2 ɗ), AM P 67054, (42 Ψ, including Ψ specimen C); Cape Armitage, 77 ° 51.4 'S 166 ° 41 'E, J. Oliver, 8 Sept. 1974, AM P 67053. Description. Body width 0.43 length in female, width 0.46 length in male, widest in female at pereonite 2 or 3, widest in male at pereonite 3. Head length 0.66 and 0.74 width (ɗ, Ψ); length posterior to eyestalks 0.77 anterior length in female, 1 in male. Frontal margin lobe length 0.37–0.38 head length (n= 3); apex broadly rounded in dorsal view, margin adjacent to apex concave, sinuous. Eyestalks apex broadly rounded, long axis angling forward at approximately 30 ° in female, 40 ° in male, somewhat flattened laterally in males. Pereonite lateral margin 1 linear, 2–7 rounded. Pereonite 5 in dorsal view distinctly narrower than pereonites 4 and 6. Pereonite lateral margins 5–7 finely denticulate. Pleon length 1.00 width in female and male. Pleotelson proximal margin length shorter than lateral margin length. ...