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 (2024-01-24 14:04:37, last updated 2024-11-30 02:48:56)
scientific name	Iophon unicorne Topsent, 1907
status

Treatment

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).

References

Campos, M., Mothes, B. & Veitenheimer-Mendes, I. L. (2007) Antarctic sponges (Porifera, Demospongiae) of the South Shetland Islands and vicinity. Part II. Poecilosclerida. Revista Brasileira de Zoologia, 24 (3), 742 - 770. https: // doi. org / 10.1590 / S 0101 - 81752007000300027

Fernandez, A. A., Lemina, N. A. & Schejter, L. (2021) Sponges (Porifera: Demospongiae) recorded at the South Shetland Islands and near the Antarctic Peninsula during the Argentinian Summer Antarctic Expedition in 2012. Proceedings of the 1 st. International Electronic Conference on Biological Diversity, Ecology and Evolution, March 15 - 30, 2021. Biology and Life Sciences Forum, 2, 38. https: // doi. org / 10.3390 / BDEE 2021 - 09470

Gocke, C. & Janussen, D. (2013) Demospongiae of ANT XXIV / 2 (SYSTCO I) Expedition - Antarctic Eastern Weddell Sea. Zootaxa, 3692 (1), 28 - 101. https: // doi. org / 10.11646 / zootaxa. 3692.1.5

Kirkpatrick, R. (1907) Preliminary Report on the Monaxonellida of the National Antarctic Expedition. Annals and Magazine of Natural History, Series 7, 20 (117), 271 - 291. https: // doi. org / 10.1080 / 00222930709487333

Koltun, V. M. (1964) Sponges of the Antarctic. 1 Tetraxonida and Cornacuspongida. In: Pavlovskii, E. P., Andriyashev, A. P. & Ushakov, P. V. (Eds.), Biological Reports of the Soviet Antarctic Expedition (1955 - 1958). Akademiya Nauk SSSR, Moscow- Leningrad, pp. 6 - 133 + 443 - 448.

Rios, P. (2006) Esponjas del Orden Poecilosclerida de las campanas espanolas de bentos antartico. PhD Thesis, Santiago de Compostela University, Santiago, 527 pp.

Topsent, E. (1907) Poecilosclerides nouvelles recueillies par le Francais dans l'Antarctique. Bulletin du Museum national d'histoire naturelle, Paris, 13, 69 - 76.

Topsent, E. (1913) Spongiaires de l'Expedition Antarctique Nationale Ecossaise. Transactions of the Royal Society of Edinburgh, 49 (3), 579 - 643, pls. I - VI. https: // doi. org / 10.1017 / S 0080456800013119

Figures

FIGURE 2. a–e Iophon gaussi. a. general morphology, scale: 4 cm; b. oxeote, scale: 100 µm; c. tylote, scale: 60 mm; d. anisochelae, scale: 20 µm; e. bipocilli, scale: 5 µm, taken from Ríos (2006). f–j. Iophon unicorne, f. general morphology, scale: 4 cm; g. oxeote. Scale: 100 µm; h. tylote, scale: 50 µm; i. anisochelae, scale: 8 µm; j. bipocilli, scale: 10 µm.