Obelia multidentata Fraser, 1914a

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: 70

publication ID

https://doi.org/10.11646/zootaxa.4487.1.1

publication LSID

lsid:zoobank.org:pub:524B23B9-8EAA-4BD6-8937-A1B8F1C057B9

persistent identifier

http://treatment.plazi.org/id/0392282A-FFA3-FFA1-AEC1-5B781AA0F879

treatment provided by

Plazi

scientific name

Obelia multidentata Fraser, 1914a
status

 

Obelia multidentata Fraser, 1914a 

? Obelia multidentata Fraser, 1914a: 154  , pl. 17, figs. 56Α, B.

Syntypes. BCPM 976-00438-001: USA, Washington, Friday Harbor ; slide. 

BCPM 976-438-002: USA, Washington, Friday Harbor ; slide. 

Lectotype, by present designation. RBCMAbout RBCM 976-00438-003: USA, Washington, Friday Harbor, one colony (at the top of slide BCPMAbout BCPM 976-00438-002), 1.0 cm high, in fairly good condition, without gonophores; slide.

Paralectotypes. BCPM 976-00438-001: USA, Washington, Friday Harbor ; slide. 

BCPM 976-00438-002: USA, Washington, Friday Harbor ; slide. 

Type locality. USA, Washington: Friday Harbor ( Fraser 1914a). 

Current status. Species inquirenda.

Remarks. No specimens have previously been fixed as name-bearing types of Obelia multidentata Fraser, 1914a  . However, syntypes of the species exist on two slides in the Fraser Hydroid Collection at the RBCMAbout RBCM ( BCPMAbout BCPM 976-00438-001, BCPMAbout BCPM 976-00438-002). Others, from the Vancouver Island area ( BCPMAbout BCPM 976-00439-001: Departure Bay, 0 7 June 1915), were collected after the species was described and are not types. Also not part of the type series is a collection from Alaska at the CASAbout CAS (CAS-IZ 14343.00). We designate, as lectotype of the species, a fragment of a colony on one of the syntype slides ( BCPMAbout BCPM 976-00438-002). That specimen ( RBCMAbout RBCM 976-00438- 003), one of two on the slide, is recognizable in being 1.0 cm high and in being the one at the top. It best exhibits the morphology of the hydrotheca and the marginal cusps, and even the hydranths. The other specimen on that slide is a paralectotype ( BCPMAbout BCPM 976-00438-002).

Obelia multidentata  was included in the synonymy of O. bidentata Clark, 1875  by Cornelius (1975, 1982). That synonymy has been repeated in the current WoRMS list. As noted earlier (Calder 1991: 72), such a conclusion is incorrect because marginal cusps on the hydrothecal rim are not bimucronate as in O. bidentata  . It appears closer to O. longissima ( Pallas, 1766)  than to O. bidentata  , although marginal cusps appear to be more deeply cut and fluted than in the former species. Detailed re-examination of Fraser’s O. multidentata  is warranted to clarify affinities of the species. It was listed as valid in Cairns et al. (2002).

RBCM

Royal British Columbia Museum

BCPM

British Columbia Provincial Museum

CAS

California Academy of Sciences

Kingdom

Animalia

Phylum

Cnidaria

Class

Hydrozoa

Order

Leptothecata

Family

Campanulariidae

Genus

Obelia

Loc

Obelia multidentata Fraser, 1914a

Calder, Dale R. & Choong, Henry H. C. 2018

2018
Loc

Obelia multidentata

Fraser, 1914a : 154