Iophon koltuni Morozov & Sabirov & Zimina 2019, sp. nov
Iophon koltuni sp. nov (Figure 3 (a – d1)) Iophon piceus dubius Koltun 1959, p. 151 – 152, fig. 107; pl. XXVI, fig. 2 Iophon cf. nigricans : Dinn and Leys 2018, p. 33 Material examined The holotype was collected at the edge of the continental shelf at the central part of the Laptev Sea (76.76°N, 124...
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| Format: | Other/Unknown Material |
| Language: | unknown |
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Zenodo
2019
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| Online Access: | https://doi.org/10.5281/zenodo.3664853 http://treatment.plazi.org/id/03A287D2FC694154987DFBE9314A346C |
| Summary: | Iophon koltuni sp. nov (Figure 3 (a – d1)) Iophon piceus dubius Koltun 1959, p. 151 – 152, fig. 107; pl. XXVI, fig. 2 Iophon cf. nigricans : Dinn and Leys 2018, p. 33 Material examined The holotype was collected at the edge of the continental shelf at the central part of the Laptev Sea (76.76°N, 124.28°E), and deposited in the Edward Eversman Zoology Museum (identification number 2.2.8.443). The paratype was found in the east of the southern tip of Spitsbergen (75.82°N, 25.62°E). Description The examined fragment of sponge is massive and more or less leaf-shaped, with several poorly pronounced lobes, about 8 cm in width and 2 cm in height. Surface uneven, slightly scabrous, coarse-pored, covered with a thin dermal membrane. Disorderly scattered irregular openings (oscules) are often covered by a coarse sieve, or partly hidden by the edges of dermal membrane surrounding them. The dermal membrane (where undamaged) is pierced by numerous small roundish pores often lying in meshes. The consistence of the body is soft and compressible, but not strong in tension. Colour dark brown (in alcohol). Skeleton Main skeleton composed of a quite diffuse network of acanthostyles lying in bundles and disorderly scattered single spicules of the same category. Skeleton of dermal membrane consists of similar network of tylotes lying more or less tangentially. Spicules (Figure 3 (a – d1)) Acanthostyles straight or slightly curved, dimensions: 226.1 – 296.9 – 324.7 ( n = 40) × 6.3 – 10.2 – 12.1 ( n = 15) µm; tylotes with slightly spined ends, dimensions: 249.8 – 266 – 286.2 ( n = 15) × 6.5 – 7.8 – 9.6 ( n = 15) µm; palmate anisochelae, dimensions: 15.4 – 22.6 – 38.7 ( n = 15) µm; bipocilla, dimensions: 10.4 – 12.85 – 16.9 ( n = 30) µm. Etymology The species is named in honour of Vladimir M. Koltun (1921 – 2004) – an outstanding Russian zoologist and spongiologist. Distribution The Barents (south-east of Spitsbergen: 75.82°N, 25.62°E) and Laptev (st. O-18) seas, the Labrador Sea. Depth range: 92 – 141 m. Remarks Lundbeck (1905) in his ... |
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