Clytia linearis

• Main Authors: Schuchert, Peter, Collins, Richard
• Format: Text
• Language: unknown
• Published: Zenodo 2021
• Subjects: Biodiversity; Taxonomy; Animalia; Cnidaria; Hydrozoa; Leptothecata; Campanulariidae; Clytia; Clytia linearis; Blanche; Medusa; Pena; North Atlantic
• Online Access: https://dx.doi.org/10.5281/zenodo.5705896; https://zenodo.org/record/5705896

Clytia linearis (Thornely, 1900) Fig. 46 A-B Obelia linearis Thornely, 1900: 453, pl. 44 fig. 6. Clytia linearis . – Cornelius, 1982: 84, fig. 12. – Medel & Vervoort, 2000: 38, bibliography. – Peña Cantero & García Carrascosa, 2002: 149, fig. 28e-f, synonymy. – Lindner & Migotto, 2002: 541, figs 2-3, life cycle. – Schuchert, 2003: 160, fig. 20, synonymy. – Galea, 2007: 88, figs 20G-I, pl. 2J-K. – Galea, 2008: 20, fig. 4A-B. – Calder, 2013: 55, fig. 15f, record Florida, taxonomy. Examined material: BFLA4077; 1 specimen; 16-APR- 2019; size 3.5 mm; preserved in alcohol for DNA extraction; 16S sequence MW528668. Observations: Medusa 3.5 mm, bell when relaxed rather flat (Fig. 46A), height about 1/3 of diameter, jelly moderately thick. Manubrium small, four very short, simple perradial lips. Four radial canals, two of them (accidentally?) approximated and therefore not giving a perfectly tetraradial symmetry. Gonads male, very thick and long, sausage shaped, arising at short distance from manubrium and stretching to almost circular canal. 39 tentacles, each arising from a spherical basal bulb, thin and long. 1 to 2 atentaculate, smaller bulbs. At least as many or more statocysts as tentacles. Colour: all tissues with a green hue, transparent. 16S Data: The 16S sequence of our single sample was compared to the 16S dataset of Cunha et al. (2017). It was nested within the well supported Clytia linearis clade (tree not shown). Its sister clade is made up of the sequences AY789810 and AY346362 from Beaufort NC and the Mediterranean respectively (provenence acc. Govindarajan et al ., 2006). The sequence divergence from AY789810 is 2.5%. Distribution: Circumglobal in shallow warm waters (Lindner & Migotto, 2002). Type locality: Papua New Guinea, New Britain, Blanche Bay (Thornely, 1900; hydroid). Remarks: The identification of this medusa was based solely on its 16S sequence which was nested within a well supported Clytia linearis clade. The morphology matched rather well the description of Clytia linearis in Lindner & Migotto (2002) which was based on cultivated medusae. It only had slightly more tentacles and much larger gonads, both easily attributable to more optimal growth conditions. Notable were the rather flat umbrella and the small size. : Published as part of Schuchert, Peter & Collins, Richard, 2021, Hydromedusae observed during night dives in the Gulf Stream, pp. 237-356 in Revue suisse de Zoologie 128 (2) on page 312, DOI: 10.35929/RSZ.0049, http://zenodo.org/record/5639938 : {"references": ["Thornely L. R. 1900. The Hydroid Zoophytes collected by Dr Willey in Southern Seas. In: Willey A. (ed.), Zoological results based on material from New Britain, New Guinea, Loyalty Islands and elsewhere, collected during the years 1895, 1896, and 1897. Cambridge, vol. 4, pp. 451 - 458, pl. 44.", "Cornelius P. F. S. 1982. Hydroids and medusae of the family Campanulariidae recorded from the eastern north Atlantic, with a world synopsis of genera. Bulletin of the British Museum, Zoology 42 (2): 37 - 148.", "Medel M. D., Vervoort W. 2000. Atlantic Haleciidae and Campanulariidae (Hydrozoa, Cnidaria) collected during the CANCAP and Mauritania-II expeditions of the National Museum of Natural History, Leiden, The Netherlands. Zoologische Verhandelingen 330: 1 - 68.", "Pena Cantero A. L., Garcia Carrascosa A. M. 2002. The benthic hydroid fauna of the Chafarinas Islands (Alboran Sea, western Mediterranean). Zoologische Verhandelingen 337: 1 - 180.", "Lindner A., Migotto A. E. 2002. The life cycle of Clytia linearis and Clytia noliformis: metagenic campanulariids (Cnidaria: Hydrozoa) with contrasting polyp and medusa stage. Journal of the Marine Biological Association of the U. K. 82: 541 - 553.", "Schuchert P. 2003. Hydroids (Cnidaria, Hydrozoa) of the Danish expedition to the Kei Islands. Steenstrupia 27 (2): 137 - 256.", "Galea H. R. 2007. Hydroids and hydromedusae (Cnidaria: Hydrozoa) from the fjords region of southern Chile. Zootaxa 1597: 1 - 116.", "Galea H. R. 2008. On a collection of shallow-water hydroids (Cnidaria: Hydrozoa) from Guadeloupe and Les Saintes, French Lesser Antilles. Zootaxa 17: 1 - 54.", "Calder D. R. 2013. Some shallow-water hydroids (Cnidaria: Hydrozoa) from the central east coast of Florida, USA. Zootaxa 3648: 1 - 72. DOI: 10.11646 / zootaxa. 3648.1", "Cunha A. F., Collins A. G., Marques A. C. 2017. Phylogenetic relationships of Proboscoida Broch, 1910 (Cnidaria, Hydrozoa): Are traditional morphological diagnostic characters relevant for the delimitation of lineages at the species, genus, and family levels? Molecular Phylogenetics and Evolution 106: 118 - 135.", "Govindarajan A. F., Boero F., Halanych K. M. 2006. Phylogenetic analysis with multiple markers indicates repeated loss of the adult medusa stage in Campanulariidae (Hydrozoa, Cnidaria). Molecular Phylogenetics and Evolution 38: 820 - 834."]}