Lafoea coalescens Allman 1877

• Main Author: Calder, Dale R.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2019
• Subjects: Biodiversity; Taxonomy; Animalia; Cnidaria; Hydrozoa; Leptothecata; Lafoeidae; Lafoea; Lafoea coalescens; North Atlantic
• Online Access: https://zenodo.org/record/4581856; https://doi.org/10.5281/zenodo.4581856

Lafoea coalescens Allman, 1877 Fig. 6e Lafoea coalescens Allman, 1877: 13, pl. 10, figs. 1, 2.— Fraser, 1943: 90. Type locality. USA: Florida, south of the Marquesas Keys, 140 ftm (256 m) (Allman 1877: 13). Material examined. Southwest Florida Shelf, inner shelf west of North Naples, 26°16.82’N, 82°44.02’W, 32.3 m, 19 July 1981, triangle dredge, one colony fragment, 2.7 cm high, without gonophores, coll. Continental Shelf Associates, ROMIZ B1914.— Southwest Florida Shelf, outer shelf northwest of the Dry Tortugas, 25°16.83’N, 83°57.35’W, 127 m, 03 August 1981, triangle dredge, several colony fragments, up to 3 cm high, without gonophores, coll. Continental Shelf Associates, ROMIZ B1915. Remarks. Lafoea coalescens Allman, 1877 is morphologically distinctive amongst its congeners. Its hydrothecae are quite unusual in having flared margins and symmetrical or nearly symmetrical walls, and its pedicels exist in two forms. They may be either straight, long, free from hydrocaulus and branches, and annulated basally, or curved, relatively short, partly adnate to hydrocaulus and branches, and smooth throughout. An infrequently reported species, records nevertheless suggest that it is widely distributed. After being originally described from the Marquesas Keys, Florida, hydroids of the species have been reported from Bermuda (Calder 1990 [1991a]), Bowditch Seamount near Bermuda (Calder 2000), the Blake Plateau (Henry et al. 2008), and the Almirante Saldanha Seamount (22.38°S, 37.58°W) off Brazil (Miranda et al. 2015). Lafoea coalescens also appears to have a wide bathymetric range, having been reported at depths from 32 m (this study) to 1285–1381 m (Calder 2000). It may be a predominantly bathyal species that penetrates into neritic waters. A more detailed account of the species is given elsewhere (Calder 1990 [1991a]). The gonosome has yet to be described. Reported distribution. Gulf coast of Florida. South of the Marquesas (Allman 1877: 13; Fraser 1943: 90; 1944: 221). Elsewhere in western North Atlantic. Bermuda: 2 km ...