Haliclona (Gellius) flagellifera Ridley & Dendy 1886

• Main Author: Van, Rob W. M.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2017
• Subjects: Biodiversity; Taxonomy; Animalia; Porifera; Demospongiae; Haplosclerida; Chalinidae; Haliclona; Haliclona flagellifera; Indian; Marion Island
• Online Access: https://zenodo.org/record/5698571; https://doi.org/10.5281/zenodo.5698571

Haliclona (Gellius) aff. flagellifera (Ridley & Dendy, 1886) Figures 16 a–e Restricted synonymy: Desmacella sp. Schmidt, 1870: 53, pl. V fig. 15. ? Gellius flagellifer Ridley & Dendy, 1886: 333; Ridley & Dendy 1887: 42, Pl. XIII figs 5, 10. Haliclona flagellifera; Van Soest 1980: 25; De Weerd, 2000: 64. Material examined. RMNH Por. 9783, 9851, 9921, 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 1969. Description. (Fig. 16 a) Encrusting with lobes and upright lamellar projections. The three samples were obtained from the same station, but were disintegrated in small cm-sized fragments making it difficult to describe the overall shape in more detail. The surface is irregular, punctate, with small oscules elevated on low cushions. The color (in alcohol) is pinkish light brown. The consistency is soft and fragile. Skeleton. (Fig. 16 b) The choanosome shows a loose reticulation of ascending tracts which have 2–3 spicules and interconnecting single spicules, but overall the skeleton is rather confused without binding spongin. The surface skeleton is unispicular, but it is discontinuous where there are large subdermal spaces. Spicules. (Fig. 16 c–e) Oxeas, flagellated sigmas, ‘normal’ sigmas. Oxeas (Fig. 16 c), slightly curved, elongated-fusiform, 226– 319 –358 x 11 – 12.7 –14 µm. Flagellated sigmas (Fig. 16 d), strongly assymetrical, with the shorter apex angularly incurved and the longer apex at first curving in and at the end curving out again, longer axis 72– 109 –159, shorter axis 51– 63 –75 µm. Normal sigmas (Fig. 16 e), symmetrical, with slightly incurving apices, 42– 51.5 –56 µm. Distribution and ecology. Guyana Shelf, Florida, Belize, elsewhere reported from all over the world (type locality is Marion Island in the Southern Indian Ocean), depth in the region: 20–410 m, elsewhere down to 1378 m. Remarks. This very characteristic species comprises most likely a species complex, because the published records ...