title: Redescriptions of Polysteganus coeruleopunctatus (Klunzinger 1870) and P. lineopunctatus (Boulenger 1903), with two new species from Western Indian Ocean.
abstract: Five valid species in the genus Polysteganus (Pisces; Sparidae) from the Western Indian Ocean are currently known: P. baissaci Smith 1978, P. coeruleopunctatus (Klunzinger 1870), P. mascarenensis Iwatsuki & Heemstra, 2011, P. praeorbitalis (Günther 1859), and P. undulosus (Regan 1908). Although P. lineopunctatus (Boulenger 1903) has long been synonymized under P. coeruleopunctatus, both species are redescribed as valid. Two new species of Polysteganus were discovered in the course of this review. Polysteganus flavodorsalis n. sp. is described on the basis of six type specimens (143-265 mm SL) from Nazareth Bank, Mascarene Plateau, Indian Ocean, and P. cerasinus n. sp. is described based on the holotype (134 mm SL) from Saya de Malha Bank. Provisional distribution patterns of the eight valid species of Polysteganus in the Western Indian Ocean are discussed. A key to the species of Polysteganus is provided.
authors.affiliation: Department of Marine Biology and Environmental Sciences, University of Miyazaki, 1-1 Gakuen-kibanadai-nishi, Miyazaki 889-2192, Japan.; Email: yuk@cc.miyazaki-u.ac.jp.
authors.forename: Yukio
authors.initials: Y
authors.lastname: Iwatsuki
authors.affiliation: The South African Institute for Aquatic Biodiversity, Private Bag 1015, Grahamstown 6140, South Africa; Email: unknown.
authors.forename: Phillip C
authors.initials: PC
authors.lastname: Heemstra
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D049628:Body Size; D005260:Female; D019156:Indian Ocean; D008297:Male; D008969:Molecular Sequence Data; D009929:Organ Size; D010473:Perciformes / Q000033:anatomy & histology / Q000145:classification* / Q000235:genetics / Q000254:growth & development; D010802:Phylogeny