Table 1.
Morphological comparisons between Chrysogorgia carolinensis sp. nov., Chrysogorgia dendritica Xu, Zhan & Xu, 2020 and Chrysogorgia abludo Pante & Watling, 2012, including detailed morphological measuring data of five specimens of C. dendritica.
| Characters/species | Chrysogorgia dendritica | Chrysogorgia carolinensis sp. nov. | Chrysogorgia abludo | |||||
|---|---|---|---|---|---|---|---|---|
| Specimen | holotype | MBM286353 | MBM286442 | MBM286443 | MBM286444 | holotype | holotype | paratype |
| Group type | A | A | A | |||||
| Branching sequence | 1/3L | 1/3L | 1/3, 1/4L, irregular | |||||
| Axis | monopodial, or a little zigzagging | sympodial | monopodial | |||||
| Colony shape | tree-shaped | tree-shaped | bottlebrush-like | tree-shaped | a little tree-shaped | bottlebrush-shaped | bottlebrush-shaped | tree-shaped |
| Colony height (cm) | 57 | 85.5 | 55 | 50 | 110 | 31 | 16 | 50 |
| Basal stem width (mm) | 2 | 7 | 1.2 | 3 | 3 | 1 | No data | 2.2 |
| Interbranch distance (mm) | 16–22 | 18 | 5–22 | 11–15 | 12–24 | 6–12 | 4.3–6.8 | 7.5–15.0 |
| Orthostiche interval (mm) | 50–55 | 50–55 | 37–47 | 36–47 | 44–61 | 19–35 | No data | No data |
| First branch internode (mm) | 15–20 | 14–22 | 11–20 | 9–23 | 20–30 | 7–15 | 6.1–11.0 | 16 |
| Polyps on internodes | 1–5 | 2–3 | 1–3 | 1–4 | 1–4 | 0 | 1–2 | No data |
| Polyps on terminal branchlets | 1–6 | 1–4 | 1–4 | 1–8 | 1–8 | 1 | 1–3 | 1–6 |
| Polyps height (mm) | 3 | 3–5 | 1.5–2.0 | 2–3 | 3–4 | 3–8, average 5 | 0.8–2.2 | 0.8–2.2 |
| Sclerites in coenenchyme (μm) | flat elongate scales often with lobed edges | 82–200 × 10–96 | 139–420 × 16–112 | 92–266 × 15–57 | 53–379 × 10–34 | elongate scales occasionally with lobed edges | small rugged scales with less lobed edges | |
| Sclerites in body wall (μm) | scales, rods and spindles | 68–190 × 7–58 at basal body; 171–516 × 20–55 in neck | 100–306 × 20–72 at basal body; 121–353 × 12–56 in neck | 80–229 × 13–82 at basal body; 207–614 × 14–76 in neck | 39–236 × 8–128 at basal body; 137–590 × 12–98 in neck | scales, rods and spindles | scales and rods | |
| Sclerites in tentacles (μm) | scales and rods | 74–135 × 4–32 | 105–365 × 6–45 | 75–429 × 10–43 | 93–275 × 24–93 | rods and spindles | rods | |
| Distribution | Kocebu Guyot | an unnamed seamount adjacent to the Mariana Trench | unnamed seamounts on the Caroline Ridge | an unnamed seamount on the Caroline Ridge | North Atlantic | |||
| References | Xu et al. 2020 | Present study | Present study | Pante and Watling 2012 | ||||