Polymastia kurilensis Koltun 1962
Polymastia kurilensis Koltun, 1962 Fig. 6 A, 7 A–D Polymastia laganoides of Burton, 1935, non Lambe 1895. Material examined. KML 1020, PBS sta. 63-74, off Kodiak I., Alaska, (58 ° 07.8′N, 150 ° 52.0′W), 126 m depth, no date, coll. unknown, one specimen. Description. Macroscopic features. Specimen no...
| Main Authors: | , , , , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
| Published: |
2014
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| Subjects: | |
| Online Access: | https://zenodo.org/record/6132526 https://doi.org/10.5281/zenodo.6132526 |
| Summary: | Polymastia kurilensis Koltun, 1962 Fig. 6 A, 7 A–D Polymastia laganoides of Burton, 1935, non Lambe 1895. Material examined. KML 1020, PBS sta. 63-74, off Kodiak I., Alaska, (58 ° 07.8′N, 150 ° 52.0′W), 126 m depth, no date, coll. unknown, one specimen. Description. Macroscopic features. Specimen not observed in life. Sponge cushion-shaped, 5 cm diameter fragment, 2 cm thick. Papillae small and conical with rounded apices, 1 mm high x 1.5 mm wide at base; multiple papillae on fragment (Fig. 6 A). Oscula not observed on preserved specimens but from internal structure located on the apices of fistulae. Sponge surface hispid with spicules projecting up to 1 mm above surface surrounding papillae; fistulae microhispid, with spicules projecting less than 100 µm above surface. Main body of sponge papillose. Consistency woody, not compressible. Colour of main sponge body in alcohol brown; fistulae lighter shade of brown. Microscopic features. Cortex 0.7 mm thick with small amount of collagen. Fistulae either inhalant or exhalant; exhalant canals 200 to 400 µm diameter. Choanosomal principal multispicular tracts packed tightly with spicules held by only small amount of spongin cementing tracts; tracts composed of styles to strongloxeas, oriented with heads toward base; tracks originating at base of sponge, extending toward surface or penetrating it (Fig. 7 A). Principal multispicular tracts carrying up through fistulae, slightly penetrating surface. Multispicular tracts surrounding central exhalant canal. Subtylostyles to tylostyles scattered randomly throughout cortex and choanosome. Spicules. Spicules of three types: 1) abundant straight styles to strongloxeas (Fig. 7 B) composing principal spicule tracts; 2) less abundant subtylostyles to tylostyles (Fig. 7 C) with long sharp points, some subtylote, vaguely fusiform, straight or slightly curved; 3) very thin, raphide-like spicules (Fig. 7 D) with a single recurved spine at one end, visible only by SEM. Spicule measurements are from the one specimen examined. KML 1020 ... |
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