Austronanus glacialis Hodgson 1910

• Main Authors: Just, Jean, Wilson, George D. F.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2006
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Isopoda; Paramunnidae; Austronanus; Austronanus glacialis; Antarc*; Antarctica; McMurdo Sound; Ross Island
• Online Access: https://doi.org/10.5281/zenodo.6254981; http://treatment.plazi.org/id/463E7938474FFFBC2E4DFCBEFC75FAB3

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 P67051 (preparatory Ψ); Winter Quarters Bay "Dump", J. Oliver, 9 Sept. 1974, AM P67052 (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. Pleonite 1 width 1.0 ...