Stolus cognatus

• Main Author: Thandar, Ahmed S.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2021
• Subjects: Biodiversity; Taxonomy; Animalia; Echinodermata; Holothuroidea; Dendrochirotida; Phyllophoridae; Stolus; Stolus cognatus; North Atlantic
• Online Access: https://doi.org/10.5281/zenodo.5307835; http://treatment.plazi.org/id/03DC1543FF9C4A05FF08F904FDE6FAB4

Stolus cognatus (Lampert, 1885) Figures 4 & 5 Semperia cognata Lampert. 1885: 67. Thyone cognita Deichmann, 1930: 169, pl. 15, figs. 1–4 (lapsus calami). Thyone cognata H.L. Clark, 1933: 115; Deichmann, 1938:134. Stolus cognatus Panning, 1949: 462 (passim); Pawson & Miller 1981: 393. Prata et al, 2017: 7, fig. 9 a–f; Prata et al. 2020: 417, fig. 8. Thyoneria cognata Deichmann 1954: 398; Deichmann 1963: 110; Tikasingh 1963: 97, figs.70–72, Caycedo 1978: 165, pl. 4, fig. 4. Diagnosis (according to Deichmann 1954, amended herein). A species of Stolus up to 140 mm long, fairly delicate, spindle or U-shaped with the oral and anal ends often turned up. Tentacles 10, of equal or unequal size, mid-ventral pair sometimes reduced or even absent. Tube feet in double rows, a few also scattered in interambulacra. Calcareous ring tubular (Figure 4E), with or without any obvious fragmentation; radial plates shorter than interradials, both fused forming a distinct tube with the radial plates carrying short posterior processes broken into a few pieces. Body wall ossicles comprise numerous elongated, smooth plates with mostly a double series of holes (Figures 4A, 5A) plus a varying number of small plates with several, often reduced holes (Figure 5B). Tube feet with perforated rods with or without the third arm (Figure 4B); end plates mostly absent, when present small, almost rudimentary, except in young individuals. Introvert with rosettes (Figure 4D & E). Tentacles with heavy rods in stalk and delicate ones in branches. Material examined: USNM- E22532, North Atlantic Ocean, Caribbean Sea, Venezuela, Isla Margarita, 14 I 78, Jones M.L., det. Miller, J., 1 spec.; USNM- E22528, North Atlantic Ocean, Caribbean Sea, Venezuela, Isla Margarita, Jones M.L., date not recorded, det. Miller, J., 2 spec. Habitat. Soft bottom to eel grass. Distribution. Caribbean region, shallow-water. Remarks. This species, well characterized by smooth, multilocular plates in the body wall, is unique amongst the Caribbean holothuroids. Of the ...