Mesothuria bifurcata Herouard 1901
Mesothuria bifurcata Hérouard, 1901 (Figure 5) Mesothuria bifurcata – Hérouard, 1901: 40; 1906: 4–6, pl. 2, fig. 3; Jangoux and Massin, 1986: 84 (list); O’Loughlin et al., 1994: 553–554; O’Loughlin, 2002: 313, 315. Mesothuria ( Mesothuria ) bifurcata – Heding, 1942a: 8, text fig. 7, figs. 1–6. Mater...
| Main Authors: | , , , , |
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| Format: | Other/Unknown Material |
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Zenodo
2012
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| Online Access: | https://doi.org/10.5281/zenodo.10536899 http://treatment.plazi.org/id/6931320BFFEDFFC1FE531264F0BCFA35 |
| Summary: | Mesothuria bifurcata Hérouard, 1901 (Figure 5) Mesothuria bifurcata – Hérouard, 1901: 40; 1906: 4–6, pl. 2, fig. 3; Jangoux and Massin, 1986: 84 (list); O’Loughlin et al., 1994: 553–554; O’Loughlin, 2002: 313, 315. Mesothuria ( Mesothuria ) bifurcata – Heding, 1942a: 8, text fig. 7, figs. 1–6. Material examined See Table 5. Type material Holotype, IRSNB, cat. no. IG 10131, Faubert II , St. 2, 12 May 1898, 71 ◦ 14 ′ S, 89 ◦ 14 ′ W, approximately 800 m (depth estimated from given latitude and longitude by O’Loughlin 2002). Specimen in poor condition. No ossicles were found by O’Loughlin (2002). Type locality Western Antarctic, Bellingshausen Sea, depth approximately 800 m. Diagnosis After Hérouard (1901) and O’Loughlin (2002): body subcylindrical, rounded anteriorly, slightly tapered posteriorly; flattened dorsoventrally. Mouth ventral, anus posterior. Body wall thick, firm, flexible; up to 20 peltate tentacles. Tubefeet in two rows, in each radius. Lateroventral radius with largest tubefeet. Very small tubefeet scattered dorsally, laterally, few ventrally, absent midventrally. Calcareous ring solid, lacking posterior prolongations, radial plates as high as wide with anterior V-shaped notch, interradial plates at least twice as wide as high. Gonad tubules with multiple branching. Respiratory trees well developed. Ossicles tables, disk with six holes, column with three arms ending in simple forks, smooth or bearing small spines (Figure 5A–D). Remarks Mesothuria bifurcata has very characteristic ossicles with bifurcated arms on the spire. Distribution Antarctic and north Atlantic (Figure 6). Bathymetric range Depth 320–2337 m (Heding 1942a; O’Loughlin 2002). Published as part of Gebruk, Andrey V., Solis-Marin, Francisco A., Billett, David S. M., Rogacheva, Antonina V. & Tyler, Paul A., 2012, Review of the genus Zygothuria Perrier, 1898 and the Atlantic group of species of the genus Mesothuria Ludwig, 1894 (Synallactidae: Holothuroidea) with description of the new species Mesothuria milleri sp. nov., pp. ... |
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