Tubularia hodgsoni Hickson & Gravely 1907
Tubularia hodgsoni Hickson & Gravely, 1907 (*) (Fig. 5; Table 4) Tubularia hodgsoni Hickson & Gravely, 1907: 13 –14, pl. 2 fig. 13, pl. 4 fig. 34; Dayton et al., 1970: 247. Tubularia ralphii — Hickson & Gravely, 1907: 13, pl. 2 fig. 12. Material examined. Tubularia hodgsoni Hickson &...
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| Format: | Other/Unknown Material |
| Language: | unknown |
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2017
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| Online Access: | https://zenodo.org/record/4386772 https://doi.org/10.5281/zenodo.4386772 |
| Summary: | Tubularia hodgsoni Hickson & Gravely, 1907 (*) (Fig. 5; Table 4) Tubularia hodgsoni Hickson & Gravely, 1907: 13 –14, pl. 2 fig. 13, pl. 4 fig. 34; Dayton et al., 1970: 247. Tubularia ralphii — Hickson & Gravely, 1907: 13, pl. 2 fig. 12. Material examined. Tubularia hodgsoni Hickson & Gravely, 1907 (type material, Natural History Museum, London, Coel no. NHM 1907.8.20.7): McMurdo Bay, Ross Sea, Winter Quarters, January 1st, 1902, No. 6 hole, 240 m. Other material examined. Tubularia ralphii Bale, 1884 (sensu Hickson & Gravely 1907) (Natural History Museum, London, Coel no. NHM 1907.8.20.8): McMurdo Bay, Ross Sea, Winter Quarters, February 28th, 1902, 37 m. Description (Type of Tubularia hodgsoni). Hydrocaulus 40 mm high (Fig. 5 A) provided with hydrorhizal stolons (one of them branched). Stem diameter increasing distally, from ca. 0.5 mm basally to ca. 1 mm distally. Tube tortuous (Fig. 5 A), quite soft, particularly at distal part, yellowish, transversally striated throughout (Fig. 5 B). Polyp large, with marked constriction between head and neck (Fig. 5 C–D). Polyp with oral crown of ca. 60 filiform tentacles (Fig. 5 E), up to 2 mm long, in several rows, and aboral whorl of 24 filiform tentacles (Fig. 5 C–D), ca. 5 mm long. Polyp with 10 unbranched blastostyles, each with ca. 30 firmly adpressed gonophores (Fig. 5 D, F); lessdeveloped basally. Measurements (in µm). Cnidome: stenoteles [range 8.5–10.0 x 7.0–7.5, mean 9.3±0.5 x 7.2±0.2 (n=10); ratio, range 1.2–1.4, mean 1.3±0.1 (n=10)]; rounded haplonemes [range 14.0–15.5 x 10.0–13.0, mean 14.8±0.5 x 11.5±0.9 (n=10); ratio, range 1.2–1.4, mean 1.3±0.1 (n=10)]; tear-shaped haplonemes [range 13.5–15.0 x 4.5–6.0, mean 14.3±0.6 x 5.2±0.5 (n=10); ratio, range 2.5–3.1, mean 2.8±0.2 (n=10)]; desmonemes [range 6–6.5 x 4 –4.5]. Description (Tubularia ralphii sensu Hickson & Gravely 1907). Eight hydrocauli and fragments, up to 50 mm high, some quite tortuous. Tubes arising from branched hydrorhizal stolons. Tubes of approximately same diameter ... |
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