Polymastia Bowerbank 1864

• Main Authors: Plotkin, Alexander, Boury-Esnault, Nicole
• Format: Text
• Language: unknown
• Published: Zenodo 2004
• Subjects: Biodiversity; Taxonomy; Animalia; Porifera; Demospongiae; Polymastiida; Polymastiidae; Polymastia; Arctic
• Online Access: https://dx.doi.org/10.5281/zenodo.5469537; https://zenodo.org/record/5469537

Genus Polymastia Bowerbank, 1864 Polymastia Bowerbank, 1864: 177. Penicillaria Gray, 1867: 527. Rinalda Schmidt, 1870: 51. TYPE SPECIES. — Spongia mamillaris Müller, 1806: 44 (by monotypy). DIAGNOSIS (from Boury-Esnault 2002). — Polymastiidae, thickly encrusting, spherical or cushionshaped, always with papillae. Choanosomal skeleton composed of radial tracts of principal spicules between which free spicules are scattered. Ectosomal skeleton composed of at least two layers, the superficial one is a palisade of small tylostyles, the lower layer is made of intermediary spicules, tangential to the surface. The principal spicules can be tylostyles, subtylostyles, styles or strongyloxeas, intermediary spicules are most often tylostyles, and ectosomal spicules are always tylostyles. : Published as part of Plotkin, Alexander & Boury-Esnault, Nicole, 2004, Alleged cosmopolitanism in sponges: the example of a common Arctic Polymastia (Porifera, Demospongiae, Hadromerida), pp. 13-20 in Zoosystema 26 (1) on page 15, DOI: 10.5281/zenodo.5393690 : {"references": ["BOWERBANK J. S. 1864. - A Monograph of the British Spongiadae. Volume 1. Robert Hardwicke, London, 289 p.", "GRAY J. E. 1867. - Notes on the arrangement of sponges, with the description of some new genera. Proceedings of the Zoological Society of London 1867: 492 - 558.", "SCHMIDT O. 1870. - Grundzuge einer Spongien- Fauna des Atlantischen Gebietes. Wilhelm Engelmann, Leipzig, 88 p.", "MULLER O. F. 1806. - Zoologia Danica. Volume 4. Havniae, Copenhagen, 44 p."]}