A revision of the supraspecific classification of the subclass Calcaronea (Porifera, class Calcarea) Radovan BOROJEVIC Departamento de Histologia e Embriologia, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Caixa Postal 68021, 21941-970 Rio de Janeiro (Brazil)
[email protected] Nicole BOURY-ESNAULT Jean VACELET Centre d’Océanologie de Marseille (CNRS-Université de la Méditerranée, UMR 6540 DIMAR), Station marine d’Endoume, F-13007 Marseille (France)
[email protected] [email protected] Borojevic R., Boury-Esnault N. & Vacelet J. 2000. — A revision of the supraspecific classifi- cation of the subclass Calcaronea (Porifera, class Calcarea). Zoosystema 22 (2) : 203-263. ABSTRACT A revision of all the genera of the subclass Calcaronea (Porifera, Calcarea) is given. In addition to the two previously described orders, Leucosoleniida Hartman, 1958 emend. and Lithonida Vacelet, 1981, we recognize a third one: the Baeriida. The order Leucosoleniida includes nine families, one of which is new (the Jenkinidae), and 42 genera of which four are new (Breitfussia, Leucandrilla, Polejaevia and Syconessa). The order Lithonida includes two families and six genera. The order Baeriida includes three fami- lies of which two are new (the Baeriidae and the Trichogypsiidae), and eight genera. The Leucosoleniida seem to have evolved from the olynthus grade, a form that is probably present in the early stages of ontogenesis of all Leucosoleniida and subsists at the adult stage in Leucosolenia. The Leucosoleniida comprises a diverse group with several pathways of progres- sing complexity of form, starting with sponges of a simple sycettid organiza- tion and leading to sponges with a complex aquiferous system and skeleton.