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Muricy, G. (2011). Diversity of Indo-Australian Plakortis (Demospongiae: Plakinidae), with description of four new species. Journal of the Marine Biological Association of the United Kingdom. 91(2): 303–319.
149228
Muricy, G.
2011
Diversity of Indo-Australian <i>Plakortis</i> (Demospongiae: Plakinidae), with description of four new species.
Journal of the Marine Biological Association of the United Kingdom
91(2): 303–319
Publication
Available for editors  PDF available [request]
A collection of 32 specimens of the genus Plakortis (Demospongiae: Plakinidae) from Australia and the Indo-Pacific is here examined. Six species are described, four of which are new to science. Plakortis lita has microrhabds, an irregular tangential ectosomal reticulation, a confused choanosomal skeleton and irregular diods and triods. Plakortis quasiamphiaster has quasiamphiasters (spined diods and triods), spheres and a skeleton with a distinct subectosomal region. Plakortis communis sp. nov. has diods and a tangential ectosomal reticulation with circular meshes; triods and spheres may be present or absent. Plakortis bergquistae sp. nov. has diods in two size-classes, the larger one up to 330–356 mm long, and large triods (actines up to 75–121 mm long). Plakortis fromontae sp. nov. has large diods (up to 220 mm long), rare triods and a double ectosomal reticulation. Plakortis hooperi sp. nov. has diods, triods, microrhabds and spheres, with a confused ectosomal skeleton, a thinly encrusting shape and cream colour. Detailed descriptions of external morphology, skeletal arrangement of the ectosome and spicules in SEM are essential for the taxonomy of Plakortis. The number of valid species in the genus is raised from 15 to 19. A key to Indo-Australian species of Plakortis is given.
Indo West Pacific Region
Systematics, Taxonomy
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2013-01-12 18:30:12Z
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2015-05-30 12:43:12Z
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Plakortis bergquistae Muricy, 2011 (original description)
Plakortis communis Muricy, 2011 (original description)
Plakortis fromontae Muricy, 2011 (original description)
Plakortis hooperi Muricy, 2011 (original description)
Plakortis lita de Laubenfels, 1954 (additional source)
Plakortis quasiamphiaster Díaz & van Soest, 1994 (additional source)
Tethya aurantium (Pallas, 1766) (additional source)
Central and Southern Great Barrier Reef for Plakortis communis Muricy, 2011 
Central and Southern Great Barrier Reef for Plakortis lita de Laubenfels, 1954 
Coral Sea for Plakortis lita de Laubenfels, 1954 
Eastern Philippines for Plakortis communis Muricy, 2011 
Exmouth to Broome for Plakortis communis Muricy, 2011 
Fiji Islands for Plakortis communis Muricy, 2011 
Fiji Islands for Plakortis lita de Laubenfels, 1954 
Fiji Islands for Plakortis quasiamphiaster Díaz & van Soest, 1994 
Houtman for Plakortis communis Muricy, 2011 
Houtman for Plakortis communis Muricy, 2011 
Houtman for Plakortis fromontae Muricy, 2011 
Southeast Papua New Guinea for Plakortis hooperi Muricy, 2011 
Sulawesi Sea/Makassar Strait for Plakortis bergquistae Muricy, 2011 
Tonga Islands for Plakortis quasiamphiaster Díaz & van Soest, 1994 
Tweed-Moreton for Plakortis lita de Laubenfels, 1954 
Vanuatu for Plakortis lita de Laubenfels, 1954 
Vanuatu for Plakortis quasiamphiaster Díaz & van Soest, 1994 
Vanuatu for Plakortis quasiamphiaster Díaz & van Soest, 1994 
Holotype QM 301057, geounit Exmouth to Broome, identified as Plakortis communis Muricy, 2011
Paratype QM 301163, geounit Exmouth to Broome, identified as Plakortis bergquistae Muricy, 2011
Holotype QM 312579, geounit Sulawesi Sea/Makassar Strait, identified as Plakortis bergquistae Muricy, 2011
Holotype QM 312880, geounit Southeast Papua New Guinea, identified as Plakortis hooperi Muricy, 2011
Holotype WAM Z-1280, geounit Houtman, identified as Plakortis fromontae Muricy, 2011


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