Hydractinia armata Fraser, 1940b

Calder, Dale R. & Choong, Henry H. C., 2018, Names of hydroids (Cnidaria, Hydrozoa) established by Charles McLean Fraser (1872 - 1946), excluding those from Allan Hancock Expeditions, Zootaxa 4487 (1), pp. 1-83 : 15

publication ID	https://doi.org/ 10.11646/zootaxa.4487.1.1
publication LSID	lsid:zoobank.org:pub:524B23B9-8EAA-4BD6-8937-A1B8F1C057B9
DOI	https://doi.org/10.5281/zenodo.5968279
persistent identifier	https://treatment.plazi.org/id/0392282A-FFE8-FFEA-AEC1-5E101875FB68
treatment provided by	Plazi
scientific name	Hydractinia armata Fraser, 1940b
status

Treatment

Hydractinia armata Fraser, 1940b: 39 , figs. 1a–f.

Syntypes. BCPM 976-00213-001 : USA, California, San Mateo County, Montara , 8 June 1939, coll. T. Bullock and R . Fernald; 60% IPA.

BCPM 976-00214-001 : USA, California, San Mateo County, Pillar Point , 15 June 1939, under ledge, coll. T. Bullock ; 60% IPA.

Lectotype, by present designation. RBCM 976-00213-002 : USA, California, San Mateo County, Montara , in tidepools, on coralline algae, 8 June 1939, one colony, with gonophores, in fairly good condition, coll. T. Bullock and R. Fernald; 70% ethanol.

Paralectotypes. BCPM 976-00213-001: USA, California, San Mateo County, Montara, in tidepools, 8 June 1939, coll. T. Bullock & R. Fernald, two fragments, with gonophores, in fair condition; 60% IPA.

BCPM 976-00214-001 : USA, California, San Mateo County, Pillar Point , 15 June 1939, intertidal ledge ( Fraser 1940b), in poor condition, coll. T. Bullock ; 60% IPA.

Type locality. USA, California: San Mateo County, Montara (misspelled as Mantara ), encrusting corallines in tidepools ( Fraser 1940b).

Current status. Valid.

Remarks. In establishing Hydractinia armata, Fraser (1940b) failed to designate name-bearing types. Specimens located at the RBCM (BCPM 976-00213-001; BCPM 976-00214-001) during this study, from the two original type localities near Moss Beach, California, are considered syntypes here. We designate the best of the available syntype colonies as the lectotype herewith (RBCM 976-00213-002).

Hydractinia armata , taken to be valid ( Cairns et al. 2002; Mills et al. 2007; WoRMS), has been reported southwards to San Nicolas Island, California ( Fraser 1948), and northwards to a tidepool at Race Rocks, British Columbia, in the Strait of Juan de Fuca (Brinckmann-Voss 1996). Its spines, very numerous, are noteworthy in being long, smooth, and nearly cylindrical up to a tapered point, with a series of internal annular thickenings ( Fraser 1940b).