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Petrosia (Petrosia) weinbergi forms thick crusts (1-2 cm thick) to plate-like structures that are dark green to brown on the outside and light brown on the inside, with the oscula distinguished by a wide white margin. The surface is smooth to slightly wavy. Oscula are slightly raised from the surface and white, 1-2 mm wide and 2-5 cm apart. Usually this species forms small spots on the upper surface.The sponge is hard and hardly compressible.
The ear-shaped specimens of Petrosia weinbergi are quite similar to Petrosia pellasarca. The former is greenish in color and lacks the small toxa.
Similar species: the crustose forms of Cliona varians and Cliona aprica may resemble the crustose forms of Petrosia weinbergi.
Petrosia (Petrosia) weinbergi is rare in shallow reefs throughout the Caribbean and on mesophotic reefs in the Greater Antilles, Guyana, Brazil, and the northwestern GOM at FGBNMS. The sponge lives in coralline algal reefs, on algal nodules, and occurs as far south as the lower mesophotic reefs.
On the cave walls of deep reefs there are specimens with scattered, slightly raised, usually cream-colored, but sometimes green, somewhat friable oscules, which have the same spicules and skeletal architecture.
Synonym: Petrosia weinbergi van Soest, 1980
Source:
Díaz MC, Nuttall M, Pomponi SA, Rützler K, Klontz S, Adams C, Hickerson EL, Schmahl GP (2023)
An annotated and illustrated identification guide to common mesophotic reef sponges (Porifera, Demospongiae, Hexactinellida, and Homoscleromorpha) inhabiting Flower Garden Banks National Marine Sanctuary and vicinities.
ZooKeys 1161: 1-68. https://doi.org/10.3897/zookeys.1161.93754
The ear-shaped specimens of Petrosia weinbergi are quite similar to Petrosia pellasarca. The former is greenish in color and lacks the small toxa.
Similar species: the crustose forms of Cliona varians and Cliona aprica may resemble the crustose forms of Petrosia weinbergi.
Petrosia (Petrosia) weinbergi is rare in shallow reefs throughout the Caribbean and on mesophotic reefs in the Greater Antilles, Guyana, Brazil, and the northwestern GOM at FGBNMS. The sponge lives in coralline algal reefs, on algal nodules, and occurs as far south as the lower mesophotic reefs.
On the cave walls of deep reefs there are specimens with scattered, slightly raised, usually cream-colored, but sometimes green, somewhat friable oscules, which have the same spicules and skeletal architecture.
Synonym: Petrosia weinbergi van Soest, 1980
Source:
Díaz MC, Nuttall M, Pomponi SA, Rützler K, Klontz S, Adams C, Hickerson EL, Schmahl GP (2023)
An annotated and illustrated identification guide to common mesophotic reef sponges (Porifera, Demospongiae, Hexactinellida, and Homoscleromorpha) inhabiting Flower Garden Banks National Marine Sanctuary and vicinities.
ZooKeys 1161: 1-68. https://doi.org/10.3897/zookeys.1161.93754
