Amphimedon

Amphimedon sp. Duchassaing & Michelotti 1864

Languages: English

Overview

General Description

Spiky rod sponge. May grow vertically or horizontally and be pale green, tan, or bright red (A. compressa).

Author(s): Freeman, Chris
Rights holder(s): Freeman, Chris

Description

Synoptic Description

Shape and size: Erect cylindrical to flattened rod, sometimes projecting horizontally.

Color: Tan, pale brown in and out; may appear pale greenish in situ.

Surface: Smooth, porous, with conules at and near the tip

Consistency: Compressible

Apertures (oscules and ostia): On one side of body; <1 cm across; raised 1-3 mm; flush in some small specimens.

Odor, mucus, exudates: When compressed, a pale brown to grey color exudate is relased

Skeletal elements: Almost straight to gently bent, double-ended needles (oxea) with tapered ends, ~120-150 μm long, 4-5 μm wide. Fibers are clear, of two diameters, and cored by spicules.

Skeletal arrangement: Exterior an incomplete fiber reticulation with more abundant spicules in fibers than in interior. Interior a well-developed fiber reticulation moderately cored by spicules; mesh diameter 100-150 (min.) to 150-230 μm (max.); fibers 30-100 μm across.

Habitat: Common on reefs

Distribution: Southeastern Florida and Florida Keys, 9-24 m. 

Remarks: Coincides with A. compressa sensu van Soest (1980) in the irregularity of the ectosomal skleleton, spicule size range and conules towards the tip, but does not coincide with color, shape (flattened rods) and oscule distribution. Should be compared with other Niphatidae to evaluate species status.

Author(s): Freeman, Chris
Rights holder(s): Freeman, Chris

Look Alikes

Amphimedon compressa

Author(s): Freeman, Chris
Rights holder(s): Freeman, Chris

Links and Resources

Other Databases

South Florida Sponges: A Guide to Identification:

http://www.nova.edu/ncri/sofla_sponge_guide/sp_2.html

World Porifera Database:

http://www.marinespecies.org/porifera/porifera.php?p=taxdetails&id=166654

Author(s): Freeman, Chris
Rights holder(s): Freeman, Chris

Additional Resources

Duchassaing De Fonbressin, P.; Michelotti, G. 1864. Spongiaires de la mer Caraïbe. Natuurkundige verhandelingen van de Hollandsche maatschappij der wetenschappen te Haarlem 21(2): 1-124, pls I-XXV.

Desqueyroux-Faúndez, R.; Valentine, C. 2002. Family Niphatidae Van Soest, 1980. Pp. 874-890. In Hooper, J. N. A. & Van Soest, R. W. M. (ed.) Systema Porifera. A guide to the classification of sponges. 1 (Kluwer Academic/ Plenum Publishers: New York, Boston, Dordrecht, London, Moscow).

Kelly, M. (2009). Demospongiae, Calcarea (Porifera). In: Gordon, D. (Ed.) (2009). New Zealand Inventory of Biodiversity. Volume One: Kingdom Animalia. 584 pp

Author(s): Freeman, Chris
Rights holder(s): Freeman, Chris

Citation

Please cite this taxon page as

C. G. Messing, Diaz, M.C., Kohler, K.E., Reed, J.K., Ruetzler, K., Van Soest, R.W.M., Wulff, J, Zea, S. Freeman, C.J., and Thacker, R.W. 2010. Taxon page for Amphimedon sp. In: Porifera LifeDesk, http://porifera.lifedesks.org/node/386

Author(s): Freeman, Chris
Rights holder(s): Freeman, Chris

Description compiled by

C. G. Messing, Diaz, M.C., Kohler, K.E., Reed, J.K., Ruetzler, K., Van Soest, R.W.M., Wulff, J, and Zea, S. 2010. South Florida Sponges: A Guide to Identification.http://www.nova.edu/ncri/sofla_sponge_guide/sp_2.html

Author(s): Freeman, Chris
Rights holder(s): Freeman, Chris

Edited by

Chris Freeman

Author(s): Freeman, Chris
Rights holder(s): Freeman, Chris