Dynamena dalmasi ( Versluys, 1899 )

Calder, Dale R., 2013, Some shallow-water hydroids (Cnidaria: Hydrozoa) from the central east coast of Florida, USA, Zootaxa 3648 (1), pp. 1-72 : 26-27

Dynamena dalmasi ( Versluys, 1899)

Fig. 8c

Desmoscyphus dalmasi Versluys, 1899: 38 , figs. 6–8.

Type locality. Haiti: “... pres de l’île Tortuga...” ( Versluys 1899: 40) .

Voucher material. Off Melbourne, 28°04.0’N, 80°12.8’W, 25 m, 01.iii.1974, R/ V Gosnold Station 222/281B, Smith-McIntyre grab, one colony, 10 mm high, without gonophores, ROMIZ B1081 .

Remarks. This hydroid species was first described and named by Allman (1877), as Thuiaria sertularioides , from Pourtalès Gulf Stream exploration collections off south Florida. As discussed in greater detail elsewhere ( Calder 1991a), that name was rejected prior to 1961 as a junior secondary homonym and it has now been replaced by the binomen Dynamena dalmasi ( Versluys, 1899) . Typically found on coastal reefs and banks (e.g., Cain 1972, as Sertularia dalmasi ; Defenbaugh 1974, as S. dalmasi ; Wenner et al. 1984; Rezak et al. 1985; Calder 1991a, 2000; Grohmann et al. 2003, 2011; Hajdu & Teixeira 2011), the reported depth range of D. dalmasi is from 8–366 m ( Calder & Cairns 2009).

Reported distribution. Atlantic coast of Florida. First record.

Western Atlantic. North Carolina ( Cain 1972) to Brazil (Oliveira et al. submitted), including Bermuda ( Calder 1991a), the Gulf of Mexico ( Calder & Cairns 2009), and the Caribbean Sea ( Vervoort 1968, as Sertularia dalmasi ).

Elsewhere. Tropical and subtropical parts of the western and eastern Atlantic and Pacific oceans ( Medel & Vervoort 1998).

Figures

FIGURE 8. a, Diphasia digitalis: part of a hydrocladium with hydrothecal pairs, ROMIZ B3964, scale equals 0.25 mm. b, Dynamena crisioides: part of hydrocaulus with basal part of a hydrocladium and hydrothecae, ROMIZ B3965, scale equals 0.25 mm. c, Dynamena dalmasi: part of hydrocaulus with two hydrothecal pairs, ROMIZ B1081, scale equals 0.25 mm. d, Dynamena disticha: part of hydrocaulus with two hydrothecal pairs, ROMIZ B3966, scale equals 0.20 mm. e, Pasya quadridentata: part of hydrocaulus with three hydrothecal pairs, ROMIZ B1085, scale equals 0.25 mm. f, Pasya quadridentata: gonotheca, ROMIZ B1085, scale equals 0.25 mm. g, Salacia desmoides: part of hydrocaulus with two hydrothecal pairs, ROMIZ B3967, scale equals 0.25 mm. h, Sertularella areyi: part of hydrocaulus with two hydrothecae, ROMIZ B1135, scale equals 0.5 mm. i, Sertularella conica: part of hydrocaulus with three hydrothecae, ROMIZ B1087, scale equals 0.25 mm.