Sertularella arbuscula ( Lamouroux, 1816 )

Gil, Marta & Ramil, Fran, 2021, Hydroids (Cnidaria, Hydrozoa) from the Vema and Valdivia seamounts (SE Atlantic), European Journal of Taxonomy 758, pp. 49-96 : 69

Sertularella arbuscula ( Lamouroux, 1816)

Table 9

Sertularia arbuscula Lamouroux, 1816: 191–192 , pl. 5 fig. 4.

Sertularella crassipes Allman, 1886: 133–134 , pl. 8 figs 4–5.

Sertularella arbuscula – Millard 1975: 281–282, fig. 91j–l.

Material examined

SOUTH ATLANTIC OCEAN • 2 colonies, up to 31 mm high, without gonothecae; Vema Seamount , stn PT4; 31°39′43″–31°38′10″ S, 8°22′37″–8°23′42″ E; 50–108 m depth; 31 Jan. 2015; SEAFO-2015 leg.; SEAFO-2015-40093 , SEAFO-2015-40123 • 2 colonies, up to 40 mm high growing on algae, without gonothecae; Vema Seamount , stn BT5; 31°37′16″–31°36′58″ S, 8°22′37″–8°23′06″ E; 71–94 m depth; 31 Jan. 2015; SEAFO-2015 leg.; SEAFO-2015-40527 , SEAFO-2015-40768 , LZM-UV slide R. 588 • 1 colony, 30 mm high, growing on bryozoan, with gonothecae; Valdivia Seamount , stn PT10; 25°36′54″–25°37′26″ S, 6°12′40″–6°11′31″ E; 476–707 m depth; 5 Feb. 2015; SEAFO-2015 leg.; SEAFO-2015-40414 .

Distribution This species has been previously recorded from the Australasian Seas, Indian Ocean, South Africa and Vema Seamount, from the littoral zone to a depth of 219 m (Millard 1966, 1975). Our records from Valdivia Bank, between 476 and 707 m, represent the deepest known localities for this species.