Aulospongus samariensis Hooper, Lehnert & Zea, 1999,

Van, Rob W. M., 2017, Sponges of the Guyana Shelf, Zootaxa 1, pp. 1-225: 59

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/03A80010-776D-FF96-FF14-A102950EF8D8

treatment provided by

Plazi

scientific name

Aulospongus samariensis Hooper, Lehnert & Zea, 1999
status

 

Aulospongus samariensis Hooper, Lehnert & Zea, 1999 

Figures 38View FIGURE 38 a –h

Aulospongus samariensis Hooper et al. 1999: 665  , figs 13–16, 36A –B.

Material examined. RMNH Por. 9928, Suriname, ‘ Luymes O.C.P.S. II’ Guyana Shelf Expedition, station I115, 7.21°N 54.8617°W, depth 81 m, triangular dredge, 24 April 1969GoogleMaps  .

Description. Erect, finger-shaped sponge ( Fig. 38View FIGURE 38 a) attached to a dead gastropod shell. Surface has lengthwise ridges and depressions. Color in alcohol red-brown, with the lengthwise depressions greyish brown. Size 3 cm high, about 1 cm in greatest diameter. Consistency firm, surface easily damaged.

Skeleton. Axially condensed choanosomal skeleton with diverging secondary axes consisting of acanthostyles. Axes densely echinated by rhabostyles, diameter of echinated axial columns 150–250 µm. Extra-axial skeleton of single long styles protruding far beyond the surface at their base surrounded by dense bouquets of thin styles and thin oxeas.

Spicules. ( Figs 38View FIGURE 38 b –h) Tylostyles, acanthostyles, thin ectosomal styles, thin ectosomal oxeas, acanthorhabdostyles.

Long ectosomal tylostyles ( Figs 38View FIGURE 38 b,b1), smooth, curved, with prominent tyle smoothly grading into the shaft, in a large size range, 572– 1112 –1448 x 12– 15.0 –19 µm.

Acanthostyles from the axial column ( Figs 38View FIGURE 38 c,c1), slightly curved, with prominent tyle, lightly spined all over, occasionally almost smooth, 382– 468 –564 x 13 – 22.1 –29 µm.

Thin styles from the ectosomal bouquets ( Figs 38View FIGURE 38 d,d1), smooth, slightly curved, with narrow rounded head thinner than the shaft, 516– 634 –738 x 2.5– 4.3 –6.5 µm.

Thin oxeas from the ectosomal bouquets ( Figs 38View FIGURE 38 e,e1), similar to the thin styles but sharply pointed at both ends, 342– 496 –690 x 1.5– 4.1 –3 µm.

Rhabdostyles in a large size range ( Figs 38View FIGURE 38 f –h), usually acanthose, but occasionally almost or entirely smooth, especially in the larger rhabdostyles; divisible in three overlapping categories, (1) larger ( Figs 38View FIGURE 38 f,f1), 330– 441 –572 x 19 – 21.4 –28 µm, (2) middle sized ( Fig. 38View FIGURE 38 g), 211– 244 –279 x 10 – 13.9 –16 µm, and (3) smaller ( Figs 38View FIGURE 38 h,h1), 151– 164 –180 x 7.5– 9.4 –12 µm.

Distribution and ecology. Guyana Shelf, Colombian Caribean, Jamaica, on reefs and fore reef slopes, at 6–90 m depth ( Guyana Shelf 81 m).

Remarks. The present material conforms in all aspects with the description of the type material by Hooper et al. 1999. The division of the rhabdostyles into size categories, observed here, was not reported by Hooper et al., but the size range is comparable with the present sizes. Unpublished specimens in the ZMA collection indicate that the species is widespread in the Greater Caribbean. Zea’s hypothesis (in Hooper et al. 1999, p. 670) that this is likely a deep-water species that occasionally occurs in shallower waters is confirmed by the present sample from 81 m.

RMNH

National Museum of Natural History, Naturalis

Kingdom

Animalia

Phylum

Porifera

Class

Demospongiae

Order

Poecilosclerida

Family

Raspailiidae

Genus

Aulospongus

Loc

Aulospongus samariensis Hooper, Lehnert & Zea, 1999

Van, Rob W. M. 2017
2017
Loc

Aulospongus samariensis Hooper et al. 1999 : 665

Hooper 1999: 665