Table 1. Comparative table of external morphology and spicular micrometries of all Neoschrammeniella species recorded in the North Atlantic Ocean.
Spicule measurements (n = 30 unless stated otherwise) are presented as minimum–mean–maximum. Data compiled from the original descriptions, or subsequent re-descriptions of type material (marked with numbers).
| Habitus | Size | Dicranoclones | Dichotriaenes | Oxeas | Spirasters | Metasters | Locality | |
|---|---|---|---|---|---|---|---|---|
| 1N. bowerbankii Holotype BMNH 69.11.60.1 (PZS 1862) | – | – | – | Cladome: 319–397 µm in diameter; rhabdome 487–939 µm length | – | 20.2–23.7 × 7.0–11.7 µm (as spiraster type I) | 28.3–39.3 × 19.6–32.7 µm (as spiraster type II) | Madeira (depth unknown) |
| 2N.bowerbankii (Johnson, 1863) | Cup-shaped to contornated lamellate masses with thick walls; colour white | 80 × 60 × 60 mm in size | 290–402 µm in size | Cladome: 176–323 µm; rhabdome: 223–513 µm |
340–820 × 1.5–2.5 µm | Short arms, 17–24 × 7.06–11.1 µm in size (as spiraster type I) | Long arms, 26.2–39.2 × 18.5–23.9 µm (as spiraster type II) | Mediterranean Sea (20–22 m) |
| N. inaequalis sp. nov. (Holotype MNHN-2018-84) | Flattened cup-shape, with a concave center; both surfaces are smooth; colour light brown | 73 × 64 × 29 mm in size; walls, 14–17 mm thick | 354–576–975 × 12–25–39 µm (n = 12) | Cladome: smooth, very irregular, 118–233–406 µm; rhabdome: long with a round tip, 136–432–1211 × 9–18–31 µm |
Large, thin, curved, 670–1144 × 5.2–7.8–13.4 µm (n = 5) | Short with thick arms, very abundant, 12.1–18.5–26.6 µm | Long and thin arms, 14.6–31.6–47.9 µm | Gorringe Seamount (605–675 m depth) |
| N. inaequalis sp. nov. (Paratype MNHN-2018-85) | Small, ball shaped with a concave top; both surfaces are smooth; colour light brown | 34 mm diameter, 20 mm height | 308–431–575 × 21–34–49 µm (n = 15) | Cladome: 158–298–463 µm; rhabdome: 221–550–1228 × 13–23–38 µm |
Large, thin, curved 449–1034 × 5–7–10 µm (n = 8) | 10.4–20.3–26.1 µm | 15.1–32.7–47.6 µm (n = 17) | Gorringe Seamount (605–675 m depth) |
|
N. piserai sp. nov. (Holotype MNHN-IP-2008-234) |
Large cup-rectangular sponge attached to the substrate by the entire lower base; both surfaces smooth; colour beige | 69 mm in diameter at the top, and 43 mm at the base, 98 mm height; walls, 11 mm thick | 280–428–522 × 16–25–37 µm (n = 6) | Cladome: smooth, 153–244–389 µm; rhabdome: long with a round tip, 198–366–535 × 10–19–33 µm |
Not present | Short with thick arms, very abundant, 14.7–18.7–23.7 µm; some very irregular, rhab-like, 13.5–17.8–23.1 µm | Long and thin arms, 18.9–30.7–41.5 µm | Plato Seamount (695 m depth) |
|
N. pomponiae sp. nov. (Holotype MNHN-IP-2008-233) |
Cup-rounded shape | 54 × 81 mm in size with a small pedicel, 23 mm in size; walls, 11 mm thick | 185–427–666 × 18–39–88 µm (n = 13) | Cladome: 157–274–374 µm; rhabdome: 239–478–684 × 11–21–37 µm (n = 17) |
Large, thick, 1,455–1,643 × 17–18 µm (n = 2) | Very abundant, 10.7–18.9–35.8 µm | 16.2–27.6–39.3 µm | Hyères Seamount (480 m depth) |
Notes:
1
Information provided by Prof. A. Pisera, 2019, personal communication.
2
Re-description in Pisera & Vacelet (2011).
‘–’ no information/not mentioned.