Haliclona (Reniera) cf. implexiformis ( Hechtel, 1965 ),

Van, Rob W. M., 2017, Sponges of the Guyana Shelf, Zootaxa 1, pp. 1-225: 30-31

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/03A80010-774A-FFB2-FF14-A3B5943FFDA7

treatment provided by

Plazi

scientific name

Haliclona (Reniera) cf. implexiformis ( Hechtel, 1965 )
status

 

Haliclona (Reniera) cf. implexiformis ( Hechtel, 1965) 

Figures 18View FIGURE 18 a –c

Restricted synonymy:

Adocia implexiformis Hechtel, 1965: 27  , pl. II fig. 2, text-fig. 2. Haliclona (Reniera) implexiformis  ; De Weerdt 2000: 17, figs 3M, 6A –D (with further synonyms).

Material examined. RMNH Por. 9835, 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. 9989, Suriname, ‘ Snellius O.C.P.S. ’ Guyana Shelf Expedition, station F40, 7.0033°N 56.4417°W, depth 59 m, bottom sand, 6 May 1966GoogleMaps  .

Description. Irregular masses of lobes and short branches ( Figs 18View FIGURE 18 a,a1), provided with several prominent, flush oscules. Size of largest mass about 6 x 5 cm, individual branches 0.7–1 cm diameter, lobes up to 1.5 x 1.5 cm, oscules 2–4 mm in diameter. Surface strongly punctate, rather irregular, shaggy (preserved specimens). Color (in alcohol) beige-brown. Consistency soft, limp.

Skeleton. Unispicular, both ectosomal ( Fig. 18View FIGURE 18 b) and choanosomal ( Fig. 18View FIGURE 18 b1). Occasional paucispicular tracts. Some binding spongin present, but not obvious.

Spicules. Oxeas only.

Oxeas ( Figs 18View FIGURE 18 c,c1), straight or lightly curved, fat or more slim, sharply pointed, 96– 114 –135 x 4 – 5.9 –8.5 µm.

Distribution and ecology. Guyana Shelf, widespread throughout the Greater Caribbean, from shallow-water down to 59 m depth (previously down to 25 m).

Remarks. The identification of this material (two samples) is uncertain, but if correct it concerns a depth record for the species (previously reported down to 25 m depth). The specimens share with Haliclona (R.) implexiformis  the irregular shape, punctate surface, soft consistency, unispicular skeleton and the relatively short oxeas. However, the oxeas especially of specimen Por. 9989 are considerably shorter (96–111 µm) than the specimens reviewed by De Weerdt (2000), given as 95– 131 –167 µm based on examination of a large number of individuals. No further matching descriptions are found in De Weerdt’s monograph.

RMNH

National Museum of Natural History, Naturalis

Kingdom

Animalia

Phylum

Porifera

Class

Demospongiae

Order

Haplosclerida

Family

Chalinidae

Genus

Haliclona

Loc

Haliclona (Reniera) cf. implexiformis ( Hechtel, 1965 )

Van, Rob W. M. 2017
2017
Loc

Adocia implexiformis

De 2000: 17
Hechtel 1965: 27
2000