Ircinia felix (Duchassaing & Michelotti, 1864),

Van, Rob W. M., 2017, Sponges of the Guyana Shelf, Zootaxa 1, pp. 1-225: 19-20

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/03A80010-7745-FFB8-FF14-A66790A6FE1D

treatment provided by

Plazi

scientific name

Ircinia felix (Duchassaing & Michelotti, 1864)
status

 

Ircinia felix (Duchassaing & Michelotti, 1864) 

Figures 10View FIGURE 10 a –d

Restricted synonymy:

Polytherses felix Duchassaing & Michelotti, 1864: 72  , pl. XIII fig. 2.

Ircinia felix  ; Wiedenmayer 1977: 60, pl. 4 fig. 3 (with additional synonyms); Van Soest 1978: 33, text-fig. 11, pl. VI fig. 4 (with further synonyms).

Ircinia strobilina  ; Van Soest 1978: 40 (in part, Guyana specimen only) (Not: Lamarck, 1814)

Material examined. RMNH Por. 9333, 9838, Guyana, ‘Luymes’ Guyana Shelf Expedition, station 65, 7.55°N 57.0833°W, depth 63 m, sandy bottom, 31 August 1970GoogleMaps  ; RMNH Por. 9371, 9797, Guyana, ‘Luymes’ Guyana Shelf Expedition, station 107, 7.7°N 57.5°W, depth 65 m, muddy sand bottom with shells, 5 September 1970GoogleMaps  ; RMNH Por. 9817, Guyana, ‘Luymes’ Guyana Shelf Expedition, station 68, 7.4167°N 57.1333°W, depth 51 m, muddy sand bottom, 31 August 1970GoogleMaps  ; RMNH Por. 9833, Guyana, ‘Luymes’ Guyana Shelf Expedition, station 87, 7.5667°N 57.2667°W, depth 59 m, bottom sand and shells, 2 September 1970GoogleMaps  ; RMNH Por. 9839, Guyana, ‘Luymes’ Guyana Shelf Expedition, station 85, 7.65°N 57.25°W, depth 69 m, bottom sand and shells, 2 September 1970GoogleMaps  ; RMNH Por. 9848, Suriname, ‘ Luymes O.C.P.S. II’ Guyana Shelf Expedition, station M97, 7.3083°N 54.1667°W, depth 130 m, bottom coarse sand, 16 April 1969GoogleMaps  ; RMNH Por. 9904, 9953, 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  ; RMNH Por. 9936, Guyana, ‘Luymes’ Guyana Shelf Expedition, station 63, 7.5833°N 57.0667°W, depth 71 m, sandy bottom, 31 August 1970GoogleMaps  ; RMNH Por. 9966, Suriname, ‘ Snellius O.C.P.S. ’ Guyana Shelf Expedition, station G56, 7.26°N 56.6667°W, depth 67–68 m, Agassiz trawl, 10 May 1966GoogleMaps  ; RMNH Por. 9996, Guyana, ‘ Snellius O.C.P.S. ’ Guyana Shelf Expedition, station H57, 7.595°N 56.8767°W, depth 94 m, bottom coarse sand and shells, 11 May 1966GoogleMaps  ; RMNH Por. 10509, Suriname, ‘ Snellius O.C.P.S. ’ Guyana Shelf Expedition, station F46, 6.312°N 56.57°W, depth 25–29 m, bottom sand, 7 May 1966GoogleMaps  .

Description. Massive, cake-shaped, globular, or more expanded ( Figs 10View FIGURE 10 a –b). Size of largest individuals in the present collection up to 15 x 10 x 6 cm. Color (in alcohol) pinkish brown or purplish grey with, at least in RMNH Por. 9333, a dark purple oscule. In other specimens oscules are less distinct and vary in diameter from 2 to 8 mm. Conules are usually about 2–4 mm in height and are about 4–6 mm apart. Consistency is compressible, but firm. The sponges are harsh to the touch.

Skeleton. ( Fig. 10View FIGURE 10 c) The surface is covered by a tough mixture of filaments and sand grains, which is carried by endings of choanosomal fibers. The fiber system is irregular and may contain a considerable load of sand grains or spicule debris, but in other parts foreign material may be virtually absent. Fibers are generally less than 100 µm in diameter, lying 400–500 µm apart, and form irregular meshes of 500 µm or more in size. Filaments ( Fig. 10View FIGURE 10 d) are usually conspicuous, but may occasionally be difficult to find in transmitted light, they are 2–5 µm in diameter with terminal knobs of about 8 µm. All these features are subject to considerable variation in the collected specimens.

Distribution and ecology. Guyana Shelf, Greater Caribbean, NE Brazil, from shallow –water down to 130 m (previously down to 100 m).

Remarks. It is with some hesitation that all the Ircinia  specimens collected on the Guyana Shelf are here assigned to I. felix  , as growth forms are quite variable. Several specimens are undoubted members of the species, but some others are doubtful. The species is polymorphic and can be distinguished from the similarly polymorphic sympatric Ircinia strobilina (Lamarck, 1814)  only on the greater coarseness of the latter. A CREOCEAN specimen from French Guyana (72 m depth) is flattened and looks to be intermediate between I. felix  and I. strobilina  . Van Soest (1978) assigned a specimen from the Guyana coast ( ZMA Por. 03538) to Ircinia strobilina  , but this is here reassigned to Ircinia felix  . Although typically inhabitants of the reef, both species have been reported from deeper water.

RMNH

National Museum of Natural History, Naturalis

ZMA

Universiteit van Amsterdam, Zoologisch Museum

Kingdom

Animalia

Phylum

Porifera

Class

Demospongiae

Order

Dictyoceratida

Family

Irciniidae

Genus

Ircinia

Loc

Ircinia felix (Duchassaing & Michelotti, 1864)

Van, Rob W. M. 2017
2017
Loc

Ircinia strobilina

Van 1978: 40
1978
Loc

Ircinia felix

Van 1978: 33
Wiedenmayer 1977: 60
1977