Clytia gracilis

• Main Authors: Mendoza-Becerril, María A., Estrada-González, Mariae C., Mazariegos-Villarreal, Alejandra, Restrepo-Avendaño, Luisa, Villar-Beltrán, Rogelio D., Agüero, José, Cunha, Amanda F.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2020
• Subjects: Biodiversity; Taxonomy; Animalia; Cnidaria; Hydrozoa; Leptothecata; Campanulariidae; Clytia; Clytia gracilis; Lofoten; Norway; Martínez
• Online Access: https://zenodo.org/record/6301351; https://doi.org/10.5281/zenodo.6301351

Clytia cf. gracilis (M. Sars, 1850) Figs. 7 H–K Laomedea gracilis M. Sars 1850: 138. Clytia cylindrica L. Agassiz 1862: 306, figs. 41–44.— Fraser 1938a: 30; Fraser 1948: 206. Campanularia attenuata Calkins 1899: 350, pl. 2, figs. 9, 9a, 9b, 9c, pl. 6, fig. 9d. Gonothyraea gracilis.— Fraser 1938a: 35; Fraser 1938b: 109; Fraser 1938c: 132; Fraser 1948: 212. Clytia attenuata.— Salcedo-Martínez et al. 1988: 13. Clytia gracilis.— Bastida-Zavala et al. 2013: 344.— Humara-Gil & Cruz-Gómez 2018: 458, fig. 4. Type locality. Norway: Lofoten (Calder 1991a; Schuchert 2001). Material examined. Polyp—PB7_28, sampling site 1 (1), immature, 27°C, on algae and ascidian. Description. Colonies stolonal. Polyps up to 2 mm high arising from creeping hydrorhiza at irregular intervals. Pedicels usually long (1082.1 μm), with 8–10 annulations at the base and 2–3 annulations below the hydrotheca, smooth in the middle. Hydrotheca cylindrical, 446.9 μm long, 232.3 μm wide at the margin, 98.4 μm wide at the diaphragm, with thin perisarc. Margin with 8–10 acute triangular cusps, slightly tilted. Hydrothecal diaphragm thin, transverse. More detailed description in Calder (1991a), Cornelius (1995), and Schuchert (2001). Taxonomic status. Accepted. AphiaID 117367. Remarks. Clytia gracilis (M. Sars, 1850) has a complicated taxonomic history, resulting from the few morphological characters available for diagnosis, and wide intraspecific variation (Cornelius 1995; Cunha et al. 2020). The polyp of the species is traditionally distinguished by its hydrotheca with pointed cusps and smooth gonotheca, in contrast with the rounded cusps and spirally grooved gonotheca usually distinctive of C. hemisphaerica (Linnaeus 1767) (see Calder 1991a; Cornelius 1995). However, recent molecular and life cycle studies have shown that some of the characters attributed to C. gracilis may be distinctive of different lineages, contributing to the validation of former synonyms and the description of new species (Lindner et al. 2011; Zhou et al. 2013; He et al. ...