| Demospongiae |
Haplosclerida |
Petrosiidae |
Petrosia (Petrosia) pellasarca |
4 |
Ear to fan-shaped, uniformly thick (ca. 1 cm), smooth, crumbly, reddish brown (pale in shaded parts). Can be confused with Cribrochalina vasculum (Lamarck, 1814), which is tougher and rather more elastic. Also, with Petrosia weinbergi, with which it shares a wide range size of oxea spicules, but lack the small toxa, is more crispy in consistency, and is greenish. |
(de Laubenfels, 1934) |
red,brown,cinnamon-tan,white,cream,fan,vase,crumbly |
| Demospongiae |
Haplosclerida |
Petrosiidae |
Petrosia (Petrosia) weinbergi |
12 |
Dark green ears partly or totally encrusted onto the substratum; hard and brittle, with a smooth but crusty surface; no oscules usually apparent. Can be confused with Petrosia pellasarca, which is brown, grows more off the substratum and is crumbly and has small toxa spicules in addition to the oxea in a wide size range that both share. There are deep reef cave-wall fully encrusting specimens with scattered, slightly elevated oscules, usually creamy but sometimes green, a bit more crumbly, with the same spicule complement and skeletal architecture. We are placing these tentatively within this species. |
van Soest, 1980 |
green,brown,cream,gray,encrusting,fan,massive,lobate,hard,crumbly |
| Demospongiae |
Haplosclerida |
Petrosiidae |
Petrosia (Strongylophora) davilai |
1 |
Dark brown, hard and thick encrustation with sprawling branching extensions. Originally described under genus Strongylophora, which now is considered a subgenus of Petrosia. Hence, the full name is Petrosia (Strongylophora) davilai. The megasclere spicules are small to large strongyles, and microscleres are microxea. There are also thin raphide like spicules which may be developmental stages of strongyles. It can be confused in the field with Petrosia weinbergi van Soest, 1980, which forms green to cream hard encrustations. |
(Alcolado, 1979) |
brown,branching,encrusting,hard |
| Demospongiae |
Haplosclerida |
Petrosiidae |
Petrosia (Strongylophora) sp.-crumbly round volcano |
1 |
A dark green-brown, crumbly, rounded volcano. Identification is tentative. It has strongyle spicules in variuos sizes, about 120 to 200 micrometers, which places it into Petrosia (Strongylophora). Ectosomal skeleton is a tangential irregular reticulation of single spicules. Internal skeleton as a ladder-like irregular unispicular reticulation. Spicules appear to be joined by spongin at the nodes; meshes are irregular because they are made up of spicules of different sizes. Spicules appear similar to Neopetrosia dominicana (Pulitzer-Finali, 1986) (originally placed under Xestospongia; not represented in this work; it has not been re-described after the original) but the external shape, the consistency and the skeleton seem to be different. We compared it to Petrosia (Strongylophora) davilai (Alcolado & Gotera, 1986), but the structure of the skeleton is different (reticulation of ascending and interconnecting multispicular tracts). |
|
green,brown,vase,crumbly |
