Dragmacidon australe ( Bergquist, 1970 )

Pereira, Preeti & Raghunathan, Chelladurai, 2020, New records of Indo-Pacific sponges from the Andaman and Nicobar Islands India, Zootaxa 4894 (4), pp. 81-97 : 87-89

publication ID

https://doi.org/10.11646/zootaxa.4894.1.4

publication LSID

lsid:zoobank.org:pub:2F3A5F52-6DDC-4472-8083-9DDE42BBA5FE

DOI

https://doi.org/10.5281/zenodo.4327287

persistent identifier

https://treatment.plazi.org/id/0390844C-FFE9-FFF0-FF0E-F9B3FD98FF0E

treatment provided by

Plazi

scientific name

Dragmacidon australe ( Bergquist, 1970 )
status

 

Dragmacidon australe ( Bergquist, 1970)

( Figures 4 View FIGURE 4 A–D)

Synonymy:

Pseudaxinella australis Bergquist, 1970: 20 : 20, Pl 4c, 12c.

Dragmacidon australe ( Bergquist, 1970) : Alvarez & Hooper, 2009: 27, fig. 7 C–D, 9 A–B; Alvarez, Voogd, & Van Soest, 2016: 457–459, fig. 5.

Material examined: 1 specimen, ZSI/ANRC–19927, March 19, 2018, Bus Stop, Neil Island , Ritchie’s Archipelago, Coll. Preeti Pereira.

Description: Thickly encrusting ( Fig. 4A View FIGURE 4 ), 5 cm in diameter and 3 cm thick; deep red in colour when alive and

on preservation ( Fig. 4B View FIGURE 4 ); consistency hard and incompressible; surface brush-like with slightly short and broad conules; oscules conspicuous; 2–4mm in diameter.

Skeleton: The skeleton is made up of thick multi-spicular tracts and forms irregular oval or circular meshes, measuring 100–400 µm in diameter ( Fig. 4C View FIGURE 4 ). Primary fibres thick, measuring 50–80 µm, densely interspersed with spicules; secondary fibres sparse.

Spicules: Styles and oxeas ( Fig. 4D View FIGURE 4 ).

Oxeas smooth and sharply pointed, 128.9–322.7–373.7 × 2.9–10.1–17.0 µm.

Styles thin and slightly curved, 267.6–305.2–351.3 × 4.2–7.7– 14.3 µm.

Distribution: Originally described from New Zealand, Temperate Australasia realm by Bergquist (1970), Dragmacidon australe was subsequently recorded from Northern Great Barrier Reef, Northern Australia, Cartier Island, Sahul Shelf of the Northeast Australian Shelf and Sahul Shelf provinces in the Central Indo-Pacific realm (Hooper & Levi 1993). Alvarez & Hooper (2009) extended the distribution range of this species to the Northern Australia in their revision of Axinellids and stated that it is “probably at the edge of its range”. However, its distribution was further extended towards the Western Coral Triangle and possibly to Sunda Shelf in the Central Indo-Pacific realm ( Alvarez et al. 2016). The current report confirms its extension into the Andaman province of the West Indo-Pacific realm.

Remarks: At present, Dragmacidon australe is known from a single specimen from Ritchie’s Archipelago in the Andaman Islands. This specimen examined herein was found to be very similar to the species described from New Zealand by Bergquist (1970).

Kingdom

Animalia

Phylum

Porifera

Class

Demospongiae

Order

Halichondrida

Family

Axinellidae

Genus

Dragmacidon

Loc

Dragmacidon australe ( Bergquist, 1970 )

Pereira, Preeti & Raghunathan, Chelladurai 2020
2020
Loc

Dragmacidon australe ( Bergquist, 1970 )

Alvarez, B. & Hooper, J. N. A. 2009: 27
2009
Loc

Pseudaxinella australis

Bergquist, P. R. 1970: 20
1970