Orthopyxis integra (MacGillivray, 1842),

Gravili, Cinzia, Vito, Doris De, Camillo, Cristina Gioia Di, Martell, Luis, Piraino, Stefano & Boero, Ferdinando, 2015, The non-Siphonophoran Hydrozoa (Cnidaria) of Salento, Italy with notes on their life-cycles: an illustrated guide, Zootaxa 3908 (1), pp. 1-187: 159-160

publication ID

http://dx.doi.org/10.11646/zootaxa.3908.1.1

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lsid:zoobank.org:pub:D6AD2B49-170B-4D9C-84AA-DBE0FEEAD8BE

persistent identifier

http://treatment.plazi.org/id/03F887DE-FF68-FF19-9CD6-0AEAD6A7FE5E

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Plazi

scientific name

Orthopyxis integra (MacGillivray, 1842)
status

 

Orthopyxis integra (MacGillivray, 1842) 

Fig. 113View FIGURE 113 A, B

See Peña Cantero & Carrascosa (2002) for a complete synonymy.

Material examined. HCUS-S 120 (Hydrozoa Collection, University of Salento—fauna of the Salento Peninsula).

Description (based on our own observations; Cornelius 1995; Schuchert 2001 a; Peña Cantero & Carrascosa 2002):

Hydroid. Hydrorhiza tortuous, anastomosing and thick; colonies stolonal; hydranth pedicels thick-walled and usually undulated throughout, with sub-hydrothecal spherule; hydranth with 25–30 tentacles; hydrothecae bellshaped, thick walled in variable degree, rim smooth, usually unthickened and often flared, basally with a perisarc ring limiting a small spherical chamber. Gonothecae sac-shaped, contour often irregular, truncate distally, usually flattened, but sometimes circular in transverse section, on stolons, with short pedicel, females with 1–3 eumedusoid buds.

Eumedusoid. Umbrella bell-shaped, higher than wide, mesoglea fairly thick; 4 radial canals either meeting at apex or each closing before they meet, each one with one irregularly-lobed sac-like outgrowth midway along each side; gonads on lobes of radial canals outgrowths; no marginal tentacles; 8 statocysts; sexually mature at release.

Cnidome. Microbasic mastigophores.

Habitat type. Eurybathic species found in the Mediterranean from the tidal level to 35 m depth ( Stechow 1919; Boero & Fresi 1986; Gili 1986).

Substrate. A wide variety of algae, phanerogams, ascidians, barnacles, mussel shells, other hydroids and cirripedes, bryozoans, anthozoans, sponge.

Seasonality. Present throughout the year ( Boero & Fresi 1986; Peña Cantero & García Carrascosa 2002; Puce et al. 2009) in the western Mediterranean; February –September (De Vito 2006; this study) in Salento waters.

Reproductive period. In the Mediterranean Sea fertile colonies occur in April ( Stechow 1919); May ( Boero & Fresi 1986); June ( Stechow 1919; Boero & Fresi 1986); July ( Picard 1958 b; Boero & Fresi 1986; Peña Cantero & García Carrascosa 2002); August ( Boero & Fresi 1986; Morri & Bianchi 1999), and September ( Boero & Fresi 1986).

Distribution. Cosmopolitan ( Broch 1918; Millard 1975; Cornelius 1982; Medel & Vervoort 2000; Medel & López-González 1996; Bouillon et al. 2004; Gravili et al. 2008 a).

Records in Salento. Moderately frequent at: La Strea, Porto Cesareo ( Presicce 1991; Faucci & Boero 2000; Ventura 2011); Costa Merlata ( Fraschetti et al. 2002; Andreano 2007); Otranto ( Fraschetti et al. 2002; De Vito 2006; Gravili 2006; Gravili et al. 2008 a; this study); Torre Lapillo, Torre dell’Inserraglio, S.ta Caterina ( Andreano 2007). Other Apulian records: Gargano ( Fraschetti et al. 2002).

Remarks. The hydroid stage and the eumedusoid were seen in the present study. Among the Campanulariidae  , O. integra  is unusually varied in morphology (for more details see Cornelius 1982; Vervoort 1993).

References. Pieper (1884) as Campanularia integra  ; Schneider (1898) and Lo Bianco (1909) as C. caliculata  ; Behner (1914) as Agastra rubra  ; Stechow (1919) as C. caliculata  and as O. compressa  ; Vatova (1928); Leloup (1934) and Rossi (1950) as C. integra  ; Picard (1951 a, 1958 a); Kramp (1959); Riedl (1959, 1966, 1991) and Yamada (1965) as O. caliculata  ; Stefani (1959) as C. caliculata  ; Teissier (1965); Riedl (1966) as O. caliculata  and O. compressa  ; Morri (1979 c, 1980 b); Boero (1981 b, c) as C. integra  ; García Carrascosa (1981) as Campanularia  ; Marinopoulos (1983) as O. caliculata  ; Isasi (1985), Balduzzi et al. (1986), Boero & Fresi (1986), Gili (1986), Roca (1986), Östman et al. (1987), Ramil (1988), Gili et al. (1989), Riedl (1991), Vervoort (1993), Altuna (1994), Medel & López-González (1996), Morri & Bianchi (1999), Piraino et al. (1999), Faucci & Boero (2000), Medel & Vervoort (2000), Schuchert (2001 a), Fraschetti et al. (2002), Peña Cantero & García Carrascosa (2002), Bouillon et al. (2004), De Vito (2006), Gravili (2006), Galea (2007), Gravili et al. (2008 a), Morri et al. (2009), Puce et al. (2009), Ventura (2011).