Mycale (Oxymycale) acerata Kirkpatrick, 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 : 413

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.10562162
persistent identifier	https://treatment.plazi.org/id/03D687FD-C507-8255-FF45-FB6A6CDCB8AA
treatment provided by	Plazi (2024-01-24 14:04:37, last updated 2024-11-30 02:48:56)
scientific name	Mycale (Oxymycale) acerata Kirkpatrick, 1907
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Mycale (Oxymycale) acerata Kirkpatrick, 1907 View in CoL

( Fig 6a View FIGURE 6 )

Restricted synonymy: Mycale acerata Kirkpatrick, 1907 .

Material examined: 3 specimens collected at stations 1 ( SOI; 60°28'S, 46°29'W; 139 m; GoogleMaps 19/2/2014; MACN-In 44389; IEO-CSIC Col.), 4 ( SOI; 60°55'S, 44°04'W; 256 m; GoogleMaps 2/3/2014; MACN-In 44390; IEO-CSIC Col.), and 9 ( SOI; 60°57'S, 46° 01'W; 229 m; GoogleMaps 5/3/2014; MACN-In 44391; IEO-CSIC Col.) GoogleMaps .

Description: Massive, flexible and soft sponges, beige/light brown in colour. Verrucose surface, with a characteristic reticulate ectosome and a fibrose-reticular choanosome of thick fibers, especially in older parts of the sponge body ( Figure 6a View FIGURE 6 ). One of the specimens is broken and badly preserved. Megascleres are oxeas 750–950/ 20–30 µm. Microscleres are two categories of anisochelae of 70–90 µm (this category is absent in the broken specimen) and 25–55 µm, and raphides in trichodragmata 100–210 µm.

Remarks: This is a common species, very well described and frequently collected in Antarctic and subantarctic waters (e.g. Göcke & Janussen (2013), Ríos (2006), Desqueyroux (1989), Fernández et al. (2021)). It was previously recorded at the SOI by Topsent (1913), Burton (1932) and Koltun (1964).

References

Burton, M. (1932) Sponges. Discovery Reports, 6, 237 - 392, pls. 48 - 57. https: // doi. org / 10.5962 / bhl. part. 24379

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. (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 6. a. Mycale (Oxymycale) acerata, general morphology, scale: 6 cm; b–f. Mycale (Mycale) bouryesnaultae; b. general morphology, scale: 3 cm, c. mycalostyle, scale: 110 µm; d. anisochelae I, scale 30 µm; e. anisochelae II, scale: 15 µm; f. sigmas, scale: 30 µm.