Hebellidae Fraser, 1912

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 : 26-28

Hebellidae Fraser, 1912

Anthohebella communis ( Calder, 1991) Fig. 13A

Synonyms available from: Galea (2013).

? Hebella scandens – Vannucci, 1949: 236, pl. 2, fig. 22, 23; 1951a: 82 [not Hebella scandens (Bale, 1888) ].

Hebellopsis communis Calder, 1991: 42 , fig. 26; Oliveira et al., 2016: 78.

Hebella communis – Grohmann 2006.

Description: Colonies stolonal, up to 1.9 mm high, arising from a creeping hydrorhiza. Pedicels large, arising from the hydrorhiza, with variable length and perisarc moderately thick and completely annulated. Each pedicel gives rise to a hydrotheca. Hydrothecae cylindrical, elongated, 1.43–1.9 mm high, 0.46–0.71 mm wide, with perisarc thin, slightly curved to one side. Margin smooth, curved to the exterior, occasionally with renovations. Hydrothecal base rounded. Nematocysts (unidentified) found at the base of the hydrothecae (13.8–17.5 × 4.4–4.7 µm).

Material examined: PCS – three infertile colonies from the rainy season. CZUFS CNI-00266; CNI-00267.

Stations: PCS – 11 e 18.

Bottom: gravel and mud.

Distribution: Brazil – Calder (1991, 2013) considered the records of Hebella scandens made by Vannucci (1949, 1950) from Espírito Santo and Rio de Janeiro as Anthohebella communis . The species also has records from Rio de Janeiro ( Grohmann et al. 2003), Espírito Santo ( Grohmann 2006), and São Paulo ( Silveira and Morandini 2011), all of them as Hebellopsis communis . World distribution – Bermuda ( Calder 1991),? Cuba ( Castellanos-Iglesias et al. 2011), Florida ( Calder 2013), and Martinique ( Galea 2013).

Remarks: Colonies found on the hydroids Aglaophenia rhynchocarpa , Hincksella formosa , Sertularelloides cylindritheca , and Thyroscyphus ramosus .

Hebella venusta ( Allman, 1877) Fig. 13B

Synonyms available: Calder (1991).

Lafoea venusta Allman, 1877: 11 , pl. 6, fig. 2, 3.

Description: Colonies stolonal, up to 860 µm high, arising from a creeping hydrorhiza giving rise to large pedicels of variable high. Perisarc moderately thick, smooth or waved. Each pedicel carries a cylindrical and deep hydrotheca, 646–860 µm high, 304–317 µm wide. Hydrothecal wall with distinct waves. Margin smooth, straight, rarely with renovations, damaged in most of the polyps. Nematocysts euryteles? (17.9–22.6 × 5.1–6.2 µm) found on pedicels.

Material examined: PCS – three infertile colonies from the rainy season. CZUFS CNI-00140.

Stations: PCS – 5 e 14.

Bottom: mud.

Distribution: Brazil – Bahia ( Shimabukuro 2007). World distribution – Calder (1991) mentioned the records from Bermuda, Western Atlantic, and a doubtful record to the Indian Ocean.

Remarks: Colonies found only on the hydroid Synthecium tubithecum .

Figures

Figure 13. (A) Anthohebella communis: general view of a polyp; (B) Hebella venusta: general view of two polyps; (C) Hebella scandens: general view of a polyp.