Redescriptions and new species in the ‘ Austrosignum-Munnogonium’ complex sensu Just & Wilson (2007), mainly from the Southern Hemisphere (Crustacea Isopoda: Paramunnidae) Author Just, Jean Natural History Museum of Denmark (Zoological Museum), University of Copenhagen, Universitetsparken 15, DK- 2100 Copenhagen Ø, Denmark; (Hon. Associate, Museum Victoria, Melbourne) Author Wilson, George D. F. Saugatuck Natural History Laboratory, Saugatuck, Michigan 49453, USA. text Zootaxa 2021 2021-04-12 4952 3 401 447 journal article 7281 10.11646/zootaxa.4952.3.1 9e67d3d2-ed4b-4976-b342-0b8397b443fe 1175-5326 4690423 837C9916-5232-4D49-9D0D-050B539CD965 Munnogonium globifrons ( Menzies, 1962 ) ( Fig. 18 ) Austrosignum globifrons Menzies, 1962: 52 , fig. 10. Munnogonium globifrons .— Bowman & Schultz, 1974: 266 ; Just & Wilson, 2007: 22 , table 1. Type fixation . Holotype , ♂ , SMNH 3221 .—Original designation. Remarks on type material . Menzies (1962: 52) stated that the type locality yielded 3 males and 3 females . SMNH 3221 contained one microvial with the presumed male holotype that was missing pleopod I. One juvenile female labelled ‘allotype’ was found in the vial with the holotype . Additionally, one small male, one female with anterior parts missing, and two juvenile females were found in a separate microvial. We presume that these five additional specimens are the paratypes . Type Locality. Magellan Strait, South of Punta Arenas, Chile . Material examined. Holotype . ♂ (pleopod I missing), 1.1 mm , Chile , Magellan Strait , near the estuary of Rio los Ciervos , South of Punta Arenas , 53°11’S , 70°55’W , tidal belt, gravel and clay, mixed with mud and covered with boulders; exposed kelp; 3 May 1949 , Lund University Chile Expedition 1948–49, stn M115, SMNH 3221 . Paratypes . Same data as holotype, SMNH Type-8818, ( 1 juv. ♀ (labelled allotype , in microvial with holotype ), 1 small ♂ , 1 ♀ anterior parts missing, 2 juvs ♀ ) . Description (male). Body widest at pereionites 3–4 (5 appears somewhat flattened). Dorsally with scattered setae. Head length 0.65 width; length posterior to eyestalks 1.3 anterior length. Frontal margin broadly rounded without angular lateral margins adjacent to antennae. Eyestalks length equals width, apex a rounded bump, long axis angling forward at 40°. Pereionite 1 sagittal length 3 times pereionite midline length. Pereionites 1–7 lateral margins rounded. Coxal plates 1–7 rounded, visible in dorsal view. Pleon length 1.6 width. Pleonite 1 proximal width equals distance between uropods, length 0.4 width. Pleotelson laterally convex, smooth, lacking inflection between lateral and proximal margins; posterior projection forming 70° angle, evenly curving into lateral margin, apex narrowly rounded. Antennula article 1 much longer than eyestalk, slightly curved, tubular, shorter than 2, width subequal to 2, reaching to or just beyond pereionite 1 lateral margin, articles 4–6 of subequal length, all shorter than 3. Antenna in ventral view tubular, width 0.25 length. Pereiopod I basis anterior margin smooth, length 2.4 width; ischium smooth, merus with few simple setae, carpus narrowly triangular, distal width equals posterior margin length, posterior margin with 3 subequal robust setae, with 1 fimbriate projection proximal to middle robust setae; propodus narrowing distally to insertion of dactylus, with fimbriate opposing margin and a few simple setae. Pereiopod II carpus and propodus with long slender robust setae on posterior margin; unguis much longer than dactylus, ventral claw slender, as long as dactylus. Male pleopods I lateral lobes distinctly projecting from lateral margin, width 0.3 distance to midline, distal sublobe with curved robust seta on apex; each distal projection forming acute angle of about 30°, with blunt apices. Uropods on lateral margin of pleotelson, protopod absent or hidden. Size Largest male 1.1 mm . Distribution. Magellan Strait, Chile . Intertidal. Remarks. Munnogonium globifrons differs from all congeners by the proportionately much larger head relative to the rest of the body, and by the presence of a curved robust seta on each lateral lobe of pleopod I.