New genera and species of the marine isopod family Serolidae (Crustacea, Sphaeromatidea) from the southwestern Pacific Author Bruce, Niel Museum of Tropical Queensland, Townsville, Queensland, Australia text ZooKeys 2009 2009-08-26 18 18 17 76 journal article 10.3897/zookeys.18.96 1b25d91d-c28e-48fa-aee7-f7a9d26c61cd 1313–2970 576495 87B9757A-986D-4CCC-8276-146A617FC905 Key to the southwestern Pacific species of Myopiarolis The key allows identification of males and females. Size is significant in species differentiation and size is included for all species even if not diagnostic. Dorsal tubercles may be small or weakly defined and need to viewed laterally and obliquely with reflected lighting to be clearly seen. 1 Dorsal surfaces of pereonites and pleonites without tubercles...................... 2 – Dorsal surfaces of pereonites and pleonites with tubercles........................... 4 2 Male coxal sternites 2–4 not elevated, without mesial X-shaped ridge......... 3 – Male coxal sternites 2–4 elevated, with mesial X-shaped ridge; average size of 11.6 mm (3) and 12.7 mm ( ♀ ) ........................................... M. systir sp. n. 3 Body dorsal surfaces punctate; head with submedian tubercle anterior to each eye; size range 18.4–21.6 mm ................................................ M. koro sp. n. – Body dorsal surfaces not punctate; head without submedian tubercles; size range of males 16.7–16.9 mm (3), 18.5 mm ( ♀ )... M. novaecaledoniae 4 Posterior of pereonites 1–3 with row of fine submarginal tubercles; lateral margin of pereonites 3 and 4 with single small distinct tubercle; dorsum smooth; pleotelson without longitudinal median carina; average size 10.6 mm (3), 12.8 mm ( ♀ ) ............................................ M. norfanz sp. n. – Posterior margin pereonite 3, 4, 6, 7 and pleonites with single fine median tubercle; dorsum punctate; pleotelson with longitudinal median carina; size 14.5 mm (3) ........................................................................ M. lippa sp. n.