Oscarella Vosmaer, 1884

Ereskovsky, Alexander V., 2006, A new species of Oscarella (Demospongiae: Plakinidae) from the Western Sea of Japan, Zootaxa 1376, pp. 37-51 : 38

Genus Oscarella Vosmaer, 1884

Type species. Halisarca lobularis Schmidt, 1862 (by monotypy). [ Oscaria ] Vosmaer, 1881: 163 (preocc. by Oscaria Gray, 1873 — Reptilia); Oscarella Vosmaer, 1884 : pl. 8 (explanation); 1887: 326 (nom. nov. for Oscaria Vosmaer ). Octavella Tuzet and Paris, 1964: 88 .

Diagnosis ( Muricy & Diaz 2002). Plakinidae without skeleton, with thinly encrusting to lobate shape. Thin ectosome (<100 µm), often limited to pinacoderm; true cortex absent. Mesohyl poorly developed, with a proportion of mesohyl to chambers varying from 0.5:1 to 1.2:1. The aquiferous system has a sylleibid organization, with spherical, eurypylous choanocyte chambers uniformly arranged around large, regular exhalant canals, and a large basal cavity.