Bougainvillia macloviana Lesson 1830

• Main Author: Peña Cantero, Álvaro L.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2015
• Subjects: Biodiversity; Taxonomy; Animalia; Cnidaria; Hydrozoa; Anthoathecata; Bougainvilliidae; Bougainvillia; Bougainvillia macloviana; Davis Sea; Kerguelen; Medusa
• Online Access: https://doi.org/10.5281/zenodo.5671790; http://treatment.plazi.org/id/3D10878AFF9EB44C10905EEAFAEA3DE2

Bougainvillia macloviana Lesson, 1830 (Figs 4–5) Perigonimus maclovianus — Vanhöffen, 1910: 284 –286, fig. 10a–d; Stepanjants, 1972: 57, fig. 2; 1979: 11, pl. 1 fig. 2; Rees, 1956: 341, 346. Cyanea Bougainvillii Lesson, 1830: 118, pl. 14 fig. 3. Hippocrene macloviana —Haeckel, 1879: 90, pl. 5 figs 1–2. Bougainvillia macloviana — Schuchert, 2007: 224 –226, fig. 11. Material examined. Gauss Deutschen Südpolar-Expedition 1901–1903 (Syntypes): ZMB Cni 14906, Gauss Station, 18.II.1903, 65°21'S – 86°06'E (Davis Sea), several stems, with gonophores, on Balanus tintinnabulum growing on the ship hull; ZMB Cni 14860, 18.II.1903, three gonophores; ZMB Cni 14843, Kerguelen, 26.I.1902, three stems or fragments, without gonophores, up to 12 mm high. Description. Monosiphonic, branched stems, up to 12 mm high, with up to eight polyps and five gonophores per stem; unbranched stems, with a single distal polyp, also present (Fig. 4 A). Stems usually tortuous and relatively long until first polyp. Stems little branched; branching irregular. Polyps relatively small (c. 480 µm high and c.170 µm in maximum diameter), with conical hypostome and a distal crown of about ten filiform tentacles (Figs 4 A–D, 5A–D). Stem perisarc extending upwards around the base of the hydranth forming a pseudohydrotheca (Figs 4 E, 5B–D). Gonophores developing medusae (Figs 4 F, 5E, F), up to 1000 µm high and up to 820 µm in maximum diameter (medusa c. 600 µm high and 670 µm in maximum diameter). Gonophores arising from small, cup-shaped pedicels of perisarc (50–230 µm high and 80–120 µm in maximum diameter) (Fig. 5 E–G). Measurements (in µm). Cnidome : Heteronemes [range 6.0–6.5 x 3.5–4.0, mean 6.2±0.2 x 3.9±0.2 (n=10); ratio, range 1.5–1.9, mean 1.6±0.1 (n=10)], desmonemes [range 3.5 x 2.0]. Remarks. Vanhöffen (1910) stated that polyps are provided with up to 16 tentacles, although usually less, and Stepanjants (1972, 1979) gives from eight to 16. According to Vanhöffen (1910), large numbers of mature medusae of Hippocrene macloviana (= B. macloviana ) ...