Clytia elsaeoswaldae Stechow, 1914

Castro Mendonça, Luana M., Parisotto Guimarães, Carmen R. & Haddad, Maria A., 2022, Taxonomy and diversity of hydroids (Cnidaria: Hydrozoa) of Sergipe, Northeast Brazil, Zoologia (e 21032) 39, pp. 1-65 : 18

Clytia elsaeoswaldae Stechow, 1914

Fig. 8C

Clytia elseae-oswaldae Stechow, 1914: 125 , – Vannucci Mendes, 1946, – Vannucci, 1951a; 1951b [part].

Clytia hemisphaerica – Migotto, 1996: 82–84, Oliveira et al., 2016.

Clytia cf. gracilis sp. 2 –Lindner, 2000: 46.

Clytia elseaeoswaldae – Lindner et al., 2011: figs 2–3.

Description: Colony stolonal, arising from a creeping hydrorhiza. Polyps up to 2.4 mm high, with long pedicels. Perisarc thin and smooth with 6–7 rings at the basal portion and 3–10 rings at the distal end. Pedicel covered with diatoms in most of its length. Hydrothecae cylindrical with thin perisarc, 0.35–0.47 mm high and 0.27–0.35 mm of marginal wide. Diaphragm thin and straight, basal chamber narrow. Margin with 9–11 long, pointed cusps, straight or slightly curved, with U-shaped embayments between them. Gonothecae pot-shaped arising from the hydrorhiza, with a smooth and thin wall, and a constriction in the distal portion.

Material examined: PCS – two colonies with gonothecae, one from dry and the other from rainy season. CZUFS CNI-00104; CNI-00291.

Stations: 5, 12.

Bottom: sand.

Distribution: Brazil – Oliveira et al. (2016) refer C. elsaoswaldae and C. hemisphaerica to several Brazilian records, that will be presented here, but require caution. Clytia elsaoswaldae has records from Fernando de Noronha ( Vannucci 1958, Amaral et al. 2009), Espírito Santo, Rio de Janeiro ( Vannucci 1950, 1951a), São Paulo ( Vannucci Mendes 1946, Vannucci 1951a, 1951b, Migotto 1996, Migotto et al. 2002, Lindner et al. 2011, Oliveira and Marques 2011, Silveira and Morandini 2011), and Santa Catarina (Denise M. Menon unpub. data). World distribution – from North Carolina the Caribbean Sea, including Bermuda and Gulf of Mexico ( Lindner et al. 2011, Calder 2019).

Taxonomic remarks: According to Lindner et al. (2011) C. elsaeoswaldae resembles C. gracilis in having inclined hydrothecal cusps and gonotheca with thin wall, but they differ in the type of colonies, mainly stolonal in the first species and branched in the second.

Remarks: Found on algae.

Figures

Figure 8. (A) Campanularia sp. 1: general view of a polyp; (B) Clytia hemisphaerica: general view of polyps and two gonothecae (red arrows); (C) Clytia elsaeoswaldae: general view of two polyps and a gonotheca (red arrows); (D, G) Campanularia sp. 2: (D) general view of a polyp; (G) detail of the hydrotheca; (E-F) Clytia gracilis: (E) general view of two polyps and two gonothecae (red arrows); (F) general view of a polyp.