Axinella balinensis, Alvarez, Belinda, De Voogd, Nicole J. & Soest, Van, 2016

Alvarez, Belinda, De Voogd, Nicole J. & Soest, Van, 2016, Sponges of the family Axinellidae (Porifera: Demospongiae) in Indonesia, Zootaxa 4137 (4), pp. 451-477 : 455

publication ID

https://doi.org/ 10.11646/zootaxa.4137.4.1

publication LSID

lsid:zoobank.org:pub:55CA5F98-BBD2-41DC-974B-B904DE47B5BC

DOI

https://doi.org/10.5281/zenodo.5621778

persistent identifier

https://treatment.plazi.org/id/4B1187F3-FFE2-F727-FF70-C70ABCD5C4F0

treatment provided by

Plazi

scientific name

Axinella balinensis
status

sp. nov.

Axinella balinensis sp. nov

( Fig. 2 View FIGURE 2 , 3)

Material examined. HOLOTYPE.— RMNH POR. 3607, Indonesia, Bali, E-side Nusa Dua, off Club Med Hotel, N of channel, 8.785°S 115.2317°E, 15 m depth, 4 April 2001, #Bal12/NV/ 040401 /055, coll. N.J. de Voogd. PARATYPE.— RMNH POR. 3611, Indonesia, Bali, Tanjung Benoa, Loloan Benoa, Indonesia, 8.7627°S, 115.2336°E, 25 m depth, 7 April 2001, #Bal17/NV/ 070401 /086, coll. N.J. de Voogd.

Description. Shape (Fig.3A). Bushy to flabelliform, 12 cm high by 15 cm wide, on short peduncle; with multiple branches, fused at base.

Colour. Beige, orange.

Oscula. Inconspicuous, irregularly distributed, with raised or flushed transparent rims, less than 1 cm.

Surface. Pierced by subectosomal spicules, covered with flat and broad projections, in rows, longitudinally oriented.

Skeleton (Fig.3B–C). Without ectosome specialisation. Choanosomal skeleton plumose and axially compressed. Extra-axial skeleton mostly halichondroid, but with longitudinal plumose-halichondroid axes diverging towards periphery.

Spicules (Fig.3D, Table 2 View TABLE 2 ). Mixture of oxeas, thick and thin, styles, thick and thin anisoxeas in a large size range, 138.4–708.3 x 5.9–22.2 µm.

Remarks. The material examined is assigned to Axinella provisionally for several reasons. The skeleton is axially compressed from which plumose tracts diverge in confusion towards surface. The spicule composition consists of oxeas and styles. It shares characteristics of the external shape, surface, and skeleton with dictyonellid genera such as Acanthella , but it lacks the typical strongyles that form part of the skeleton of that genus; or Phakettia , where the skeleton is usually formed by large styles; or Dictyonella , where there are no oxeas in the spicule complement and species are generally lobate. The skeleton and surface characteristics also resemble the doubtful axinellid genus Reniochalina, ( Alvarez & Hooper 2009) , but no sign of spination in the megascleres was found. The material might also belong to a new genus not related to Axinellidae . Thus additional, independent evidence from genetic studies is necessary to conclude with reliability the generic position of this species.

Distribution. Known only from the type locality ( Fig. 2 View FIGURE 2 ). Found between 15–25 m depth.

Etymology. Named after the type locality.

TABLE 2. Spicule dimensions of Axinella balinensis sp. nov.

Specimen Locality Oxeas Style
RMNH POR.3607 (holotype) Bali 138.4–664.3µm (412.1±139.3) x 7.8–22.2µm (15.5±4) 236.9–457.9µm (345±56.9) x5.9–17.5µm (13±2.6)
RMNH POR. 3611 Bali 273.1–708.3µm (479.3±132.9) x 9.6–21.3µm (16.5±2.5) 289.7–580.5µm (415.6±89.6) x6.8–18.9µm (13.3±2.9)
RMNH

National Museum of Natural History, Naturalis

POR

Universit� degli Studi di Napoli Federico II

GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF