Symmetroscyphus intermedius ( Congdon, 1907 )

Calder, Dale R., 2013, Some shallow-water hydroids (Cnidaria: Hydrozoa) from the central east coast of Florida, USA, Zootaxa 3648 (1), pp. 1-72 : 22

Symmetroscyphus intermedius ( Congdon, 1907)

Fig. 7a, b

Thyroscyphus intermedius Congdon, 1907: 482 , figs. 33–36.

Type locality. Bermuda: Mangrove Bay , 32°18'10"N, 64°51'30"W ( Congdon 1907) .

Voucher material. Bessie Cove , north of St. Lucie Inlet, 27°11’07”N, 80°09’41”W, on seagrass, <0.5 m, 19.ii.1991, collected manually, one colony in two fragments, up to 4 mm high, without gonophores, coll. D.R. Calder, ROMIZ B1117 .

Remarks. A taxonomic account of Symmetroscyphus intermedius ( Congdon, 1907) has been given earlier ( Calder 1991a). Occurring in shallow-waters with algal symbionts in its tissues, this species is found on substrates such as seagrasses, algae, prop roots of red mangroves, and other hydroids ( Calder 1991c; Kaehler & Hughes 1992; Galea 2008; Castellanos Iglesias et al. 2011). Gonophores of S. intermedius remain undescribed.

Reported distribution. Atlantic coast of Florida. First record.

Western Atlantic: Bermuda ( Calder 1991a) to the Caribbean Sea ( Calder & Kirkendale 2005; Castellanos Iglesias et al. 2011).

Figures

FIGURE 7. a, Symmetroscyphus intermedius: part of erect colony, ROMIZ B1117, scale equals 0.5 mm. b, Symmetroscyphus intermedius: part of colony with two hydrothecae, ROMIZ B1117, scale equals 0.25 mm. c, Thyroscyphus marginatus: part of hydrocaulus with three hydrothecae, ROMIZ B3963, scale equals 0.5 mm. d, Thyroscyphus marginatus: pedicel and hydrotheca, ROMIZ B3963, scale equals 0.25 mm. e, Thyroscyphus ramosus: part of hydrocaulus with four hydrothecae, ROMIZ B1133, scale equals 0.5 mm. f, Thyroscyphus ramosus: pedicel and hydrotheca, ROMIZ B1133, scale equals 0.25 mm.