Iophon unicorne Topsent, 1907

Schejter, Laura, Cristobo, Javier & Ríos, Pilar, 2024, New records of demosponges (Porifera) from the South Orkney Islands (Antarctica) with a checklist for the region, Zootaxa 5403 (4), pp. 401-430 : 407

publication ID

https://doi.org/ 10.11646/zootaxa.5403.4.1

publication LSID

lsid:zoobank.org:pub:C2EAB19C-07CB-4013-9C93-D25259EA2673

DOI

https://doi.org/10.5281/zenodo.10562132

persistent identifier

https://treatment.plazi.org/id/03D687FD-C50D-825F-FF45-FC6C6A74B83F

treatment provided by

Plazi

scientific name

Iophon unicorne Topsent, 1907
status

 

Iophon unicorne Topsent, 1907 View in CoL

( Fig. 2f–j View FIGURE 2 )

Restricted synonymy: Iophon spatulatum Kirkpatrick, 1907 , Iophon spatulatus Kirkpatrick, 1907 ; Iophon unicornis Topsent, 1907 .

Material examined: eight specimens collected at stations 1 ( SOI; 60°28'S, 46°29'W; 139 m; GoogleMaps 19/2/2014; MACNIn 44372; IEO-CSIC Col.), 2 ( SOI; 60°53'S, 44°33'W; 218 m; GoogleMaps 20/2/2014; MACN-In 44373), 3 ( SOI; 61°31'S, 45°39'W; 308 m; GoogleMaps 28/2/2014; MACN-In 44374; IEO-CSIC Col.), 4 ( SOI; 60°55'S, 44°04'W; 256 m; GoogleMaps 2/3/2014; MACN-In 44375), 7 ( SOI; 61°00'S, 46°44'W; 609 m; GoogleMaps 3/3/2014; IEO-CSIC Col.), 17 ( SOI; 60°42,260'S, 46°01,18'W; 86 m; GoogleMaps 8/3/2012; MACN-In 44376; IEO-CSIC Col.) and 18 ( SOI; 60°47,561'S, 45°36,854'W; 96 m; GoogleMaps 10/3/2012; MACN-In 44377; IEO-CSIC Col.) GoogleMaps .

Description: Massive to slightly flabellate or digitiform specimens, sometimes with evident oscula, brown colour ( Figure 2f View FIGURE 2 ). Spicules are oxeas of 400–630 µm by 20–30 µm; acanthotylotes of 270–350 µm/ 10 µm, usually mucronate at one end, rare anisochelae 17.5 µm and abundant bipocilli in many specimens, measuring 10–12.5 µm ( Figure 2g –j View FIGURE 2 ).

Remarks: This is a common Antarctic species, well known from several locations and previously recorded by Koltun (1964), Ríos (2006), Campos et al. (2007), Göcke & Janussen (2013), Fernández et al. (2021), among others. It may be epibiotic on bryozoans, algae or ophiuroids. It was previously recorded at the SOI by Topsent (1913).

Kingdom

Animalia

Phylum

Porifera

Class

Demospongiae

Order

Poecilosclerida

Family

Acarnidae

Genus

Iophon

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