Xestospongia muta ( Schmidt, 1870 ),

Van, Rob W. M., 2017, Sponges of the Guyana Shelf, Zootaxa 1, pp. 1-225: 40-41

publication ID

http://doi.org/ 10.5281/zenodo.272951

publication LSID

lsid:zoobank.org:pub:6D68A019-6F63-4AA4-A8B3-92D351F1F69B

persistent identifier

http://treatment.plazi.org/id/03A80010-7770-FF84-FF14-A7C093EAFE87

treatment provided by

Plazi

scientific name

Xestospongia muta ( Schmidt, 1870 )
status

 

Xestospongia muta ( Schmidt, 1870) 

Figures 25View FIGURE 25 a –c

Restricted synonymy:

Schmidtia muta Schmidt, 1870: 44  .

Petrosia muta  ; Topsent 1920: 8.

Xestospongia muta  ; De Laubenfels 1936: 70; Wiedenmayer 1977: 115, pl. 14 figs 6–7, pl. 15 figs 1–2, text-fig. 129; Van Soest 1980: 66, pl. XI fig. 1, text-fig. 23.

Material examined. RMNH Por. 9784, 9805, Guyana, ‘Luymes’ Guyana Shelf Expedition, station 65, 7.55°N 57.0833°W, depth 63 m, sandy bottom, 31 August 1970GoogleMaps  ; RMNH Por. 9914, Suriname, ‘ Snellius O.C.P.S. ’ Guyana Shelf Expedition, station G7, 7.28°N 56.7933°W, depth 64 m, bottom sand, 7 May 1966GoogleMaps  .

Description. Two small damaged specimens and a fragment of this common West Atlantic species. The larger specimen ( Fig. 25View FIGURE 25 a) is a cup-shaped column, 14 cm high, 12 cm in widest diameter. Surface grooved and pitted. Color (in alcohol) brown-red outside, pale beige inside. Consistency hard, crumbly.

More complete and larger, barrel-shaped specimens, up to 50 cm high and 45 cm in diameter, were obtained in French Guyana waters by the CREOCEAN expedition.

Skeleton. ( Fig. 25View FIGURE 25 b) Surface cover is a dense tangential reticulation of intercrossing single spicules. Choanosomal skeleton a dense mass of spicules arranged in irregular rounded meshes.

Spicules. Oxeas only.

Oxeas ( Fig. 25View FIGURE 25 c,c1), curved, bluntly pointed, in a limited size range, 384– 421 –462 x 15 – 18.3 –22 µm.

Distribution and ecology. Guyana Shelf, Florida, and throughout the Greater Caribbean, also in NE Brazil, on reefs and on hard bottoms in deeper water, down to 94 m depth ( Guyana Shelf, 63–64 m, CREOCEAN specimens were from 72–76 m).

Remarks. The present specimens share the predominance of oxeas over strongylote forms with Schmidt’s type and the specimens described by Van Soest (1980) from Curaçao and Puerto Rico, Zea (1987) from Colombia, and Hajdu et al. (2011) from NE Brazil  . In fact no strongyles were observed in the present specimens, contrary to Wiedenmayer’s (1977) description of the species from the Bahamas.

RMNH

National Museum of Natural History, Naturalis

Kingdom

Animalia

Phylum

Porifera

Class

Demospongiae

Order

Haplosclerida

Family

Petrosiidae

Genus

Xestospongia

Loc

Xestospongia muta ( Schmidt, 1870 )

Van, Rob W. M. 2017
2017
Loc

Xestospongia muta

Van 1980: 66
Wiedenmayer 1977: 115
De 1936: 70
1936
Loc

Petrosia muta

Topsent 1920: 8
1920
Loc

Schmidt 1870: 44