Some anthoathecate hydroids and limnopolyps (Cnidaria, Hydrozoa) from the Hawaiian archipelago 2590 Author Calder, Dale R. text Zootaxa 2010 2010-08-31 2590 1 1 91 https://biotaxa.org/Zootaxa/article/view/zootaxa.2590.1.1 journal article 10.11646/zootaxa.2590.1.1 1175­5334 Sphaerocoryne bedoti Pictet, 1893 Figs. 44, 45 Sphaerocoryne bedoti Pictet, 1893: 10 , pl. 1, figs. 5, 6. Type locality. Indonesia : Moluccas , Ambon ( Pictet 1893 ) . Material examined. Midway Atoll : on coral rubble, 20.ix.2002 , one colony, up to 6 mm high, without medusa buds, coll. A. Faucci , BPBM (without collection number) .– Midway Atoll : on coral rubble, 20.ix.2002 , one colony, up to 6 mm high, without medusa buds, coll. A. Faucci , ROMIZ B3830 . Description. Hydroid colonies stolonal, up to 6 mm high, arising from a hydrorhiza creeping over reef rubble. Hydrocaulus monosiphonic, unbranched, reaching just over 5 mm high, bearing a terminal hydranth. Perisarc transparent, with that on hydrorhiza of moderate thickness, mostly smooth but with occasional wrinkles and twists, that on hydrocauli tending to be thinner, smooth or with a few wrinkles, especially at proximal end, not regularly annulated, terminating at base of hydranth well below tentacles. Hydranths pyriform to topshaped, about 0.8 mm high, 0.5 mm wide; tentacles all capitate, about 22 in number, of varied length, scattered in a narrow band around widest part of hydranth; terminal knobs varied in size, reaching about 110 µm in diameter; hypostome elongate, proboscis-like. Gonophores not seen. FIGURE 43. Pennaria disticha : hydrocaulus, branch, and two hydranths with developing eumedusoids, ROMIZ B3829. Scale equals 1mm. FIGURE 44. Sphaerocoryne bedoti : part of hydrocaulus and hydranth, ROMIZ B3830. Scale equals 0.5 mm. FIGURE 45. Sphaerocoryne bedoti : nematocysts, ROMIZ B3830. a, desmoneme. b, small stenotele. c, large stenotele. FIGURE 46. Porpita porpita : upper surface of float and mantle, BPBM D452. Scale equals 1 cm . FIGURE 47. Velella velella : lateral view of float, mantle, and sail, BPBM D453. Scale equals 5 mm . Remarks. Information on the taxonomy, life cycle, and cnidome of Sphaerocoryne bedoti Pictet, 1893 has been provided earlier ( Calder 1988 ). A more recent overview of the species is given by Schuchert (2010) . Authors including Mammen (1963) , Millard (1975) , Hirohito (1988) , Schuchert (2010) and others are followed in regarding Sphaerocoryne multitentaculata ( Warren, 1908 ) as conspecific with this species. Records of the hydroid stage of Sphaerocoryne bedoti are commonly but not exclusively associated with sponge substrates (e.g. Pictet 1893 ; Mammen 1963 ; Millard 1975 ; Hirohito 1988 ; Calder 1988 , 1991; Calder et al. 2003 ; Galea 2008 ; Schuchert 2010 ). Material examined here, the first record of the species from Hawaii , occurred on calcareous reef rubble. The cnidome of hydroids from Hawaii examined here corresponded with that of material from Bermuda ( Calder 1988 ). Elongate-oval desmonemes, and small and large stenoteles, were present (Fig. 45). Reported distribution. Hawaii . New record. Worldwide. Circumglobal in warm waters; 0–13 m ( Pictet 1893 ; Millard & Bouillon 1974 ; Millard 1975 ; Wedler & Larson 1986 ; Hirohito 1988 ; Petersen 1990 ; Calder et al. 2003 ; Calder & Kirkendale 2005 ; Bouillon et al. 2004 ; Galea 2008 ; Schuchert 2010 ).