Placospongia Gray 1867
| Autor: | David-Colón, Jesús, Zea, Sven, Marín-Casas, Dairo |
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| Rok vydání: | 2023 |
| Předmět: | |
| DOI: | 10.5281/zenodo.7673003 |
| Popis: | Genus Placospongia Gray, 1867 Diagnosis (modified from Rützler & Hooper 2000): encrusting or branched sponges, covered by smooth cortical plates separated by contractile grooves, where pores and oscules are located. Size ranges from small crusts (average 25 cm 2, 2 mm thick) to erect branches (36 cm high, 1.5 cm and more in diameter). The live color of the known species is variable. Skeletal structure radiated, with tylostyles tracts that rise from a lower layer of selenasters (basal in encrusting specimens or as a central axis in branched specimens) and reach the cortex, where they support the margins of the cortical plates. Megascleres are tylostyles that can be of two size classes; microscleres include selenasters of the cortex and basal layer (or central axis), and streptasters, spherasters, microrhabds, oxyasters, microspirasters, and microspherasters in the choanosome and the ectosome. Published as part of David-Colón, Jesús, Zea, Sven & Marín-Casas, Dairo, 2023, The Genus Placospongia (Demospongiae: Clionaida) From The Colombian Caribbean, pp. 501-526 in Zootaxa 5244 (6) on page 503, DOI: 10.11646/zootaxa.5244.6.1, http://zenodo.org/record/7673001 {"references":["Gray, J. E. (1867) On Placospongia, a new generic form of Spongiadae in the British Museum. Proceedings of the Zoological Society of London, 1867 (1), 127 - 129.","R ¸ tzler, K. & Hooper, J. (2000) Two new genera of Hadromerid sponges (porifera, Demospongiae). Zoosystema, 22 (2), 337 - 344."]} |
| Databáze: | OpenAIRE |
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