Dragmacidon cf. australe ( Bergquist, 1970 )

Alvarez, Belinda, De Voogd, Nicole J. & Soest, Van, 2016, Sponges of the family Axinellidae (Porifera: Demospongiae) in Indonesia, Zootaxa 4137 (4), pp. 451-477: 457-459

publication ID

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

publication LSID

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

persistent identifier

http://treatment.plazi.org/id/4B1187F3-FFE0-F72B-FF70-C0A8BB5CC11D

treatment provided by

Plazi

scientific name

Dragmacidon cf. australe ( Bergquist, 1970 )
status

 

Dragmacidon cf. australe ( Bergquist, 1970) 

( Fig. 2 View Figure , 5 View Figure )

Pseudaxinella australis Bergquist, 1970: 20  ; Hooper & Lévi 1993: 1439; Hooper & Wiedenmayer 1994: 80; Alvarez et al. 2000: 196

Dragmacidon australis  .— Alvarez & Hooper 2002: 735

Dragmacidon australe  .— Alvarez & Hooper 2009: 27

Material examined. HOLOTYPE.— NMNZAbout NMNZ Por. 26, Takatu Channel, Northland, New Zealand, 11 m depth. ADDITIONAL SPECIMENS.— RMNHAbout RMNH PORAbout POR. 3610, Indonesia, Bali, NE-side Pulau Serangan, off lighthouse, 8.7213 °S, 115.2586 °E, 17 m depth, 5 April 2001, #Bali 14 /NV/ 050401 / 75, coll. N.J. de Voogd. RMNHAbout RMNH PORAbout POR. 3615, Indonesia, Bali, SE-end Tulamben beach, 8.2777 °S, 115.5958 °E, 30 m depth, 12 April 2001, #Bal 22 / 110401 / 164, coll. N.J. de Voogd. ZMAAbout ZMA Por. 18711, Thailand, West of Ko Kudi, Samet Islands, Rayong, 12.57672 °N, 101.5094 °E, 4 m depth, 28 October 2001, coll. Sumaitt Putchakarn.

Description. Shape ( Fig. 5 View Figure A, B). Thickly encrusting and adapting to the substrate shape to massive-globular. Approximately 3–18 cm in diameter and/or 2 cm thick.

Colour. Deep orange to red

Consistency. Hard to incompressible in preserved stage.

Oscula. From inconspicuous or minute, up to 5 mm in diameter, depending on the specimen.

Surface. Brush-like, regularly covered with short and broad conules, fused laterally, creating a microreticulation at surface. Conules end with brushes of spicules.

Skeleton ( Fig. 5 View Figure C). Plumoreticulated to halichondroid; formed by thick plumose or plumo-echinated multispicular tracts, up 200–300 µm thick, forming an irregular reticulation of large, rounded to oval meshes. Main tracts connected by shorter and relatively thinner plumose tracts.

Spicules ( Fig. 5 View Figure D, Table 4). Oxeas, 332.6–421.6 µm x 14.2–24.4 µm and styles 280.2–430.1 µm x 13.4–20.7 µm in similar proportions.

Remarks. The material examined here is very similar in all their morphological and skeletal characteristics to that reported from northern Australia by Alvarez & Hooper (2009). This species is also very similar to Dragmacidon reticulatum ( Ridley & Dendy, 1886)  from the Central West Atlantic both in external morphology and spicule composition. A specimen from Thailand was also available for examination and is referred here to D. austral  e with some hesitation. This specimen differed from the rest of the material examined in that is thinly encrusting and the reticulation of the skeleton seems to be incomplete and represented only by short plumose tracts ascending from a basal skeleton formed by spicules without any orientation and detritus. Unusual dichotriaenes and lophotriaenes were observed in the basal skeleton but is assumed here these spicules are foreign.

Distribution. Dragmacidon australe  was first recorded for New Zealand (Temperate Australasia realm). Additional records from GBR (Tropical Southwestern Pacific province) and northern Australia (Sahul Shelf province) were reported in Hooper & Lévi (1993) and Alvarez & Hooper (2009). This revision extends the distribution range of this species to Western Coral Triangle and Sunda Shelf [?]( Fig. 2 View Figure ) provinces of the Central- West Indo-Pacific realm.

The wide distribution of Dragmacidon australe  suggests this species might be both a broadcaster and cosmopolitan or it might represent a complex of cryptic species that can be differentiated only with the use of genetic methods. No morphological characters are currently available to distinguish the different geographical populations.

Specimen Locality Oxeas Styles

RMNHAbout RMNH PORAbout POR. 3610 Bali 332.6–421.6 µm (372.6 ± 22.6) 280.2–430.1 µm (363.7 ± 38.7) x 14.2–24.4 µm (18.6 ± 2.3) x 13.4–20.7 µm (17.7 ± 1.8) ZMAAbout ZMA Por. 18711 Thailand 247.1–414.8 µm (332.6 ± 46.4) 268.9–497.6 µm (367.2 ± 63.7)

NMNZ

Museum of New Zealand Te Papa Tongarewa

RMNH

National Museum of Natural History, Naturalis

POR

Universit� degli Studi di Napoli Federico II

ZMA

Universiteit van Amsterdam, Zoologisch Museum

Kingdom

Animalia

Phylum

Porifera

Class

Demospongiae

Order

Halichondrida

Family

Axinellidae

Genus

Dragmacidon

Loc

Dragmacidon cf. australe ( Bergquist, 1970 )

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

2016
Loc

Dragmacidon australe

Alvarez 2009: 27

2009
Loc

Dragmacidon australis

Alvarez 2002: 735

2002
Loc

Pseudaxinella australis

Alvarez 2000: 196
Hooper 1994: 80
Hooper 1993: 1439Bergquist 1970: 20

1993