Halecium diminutivum Fraser, 1940a

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: 31

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-FFF8-FFFA-AEC1-5CF118B0F921

treatment provided by

Plazi

scientific name

Halecium diminutivum Fraser, 1940a
status

 

Halecium diminutivum Fraser, 1940a 

Halecium diminutivum Fraser, 1940a: 578  , pl. 33, figs. 6a, b.

Holotype. USNM 43438View Materials: USA, Massachusetts, Nantucket Shoals , on Sertularella  sp., one colony, 1.2 mm high, in fair condition, without gonothecae, labelled “ type ”; ethanol. 

Schizoholotype. BCPM 976-00474-001: USA, Nantucket , on Sertularella  sp., one colony fragment, in fair condition, without gonothecae; slide. 

Type locality. USA, Massachusetts: on Nantucket Shoals , epizoic on Sertularella ( Fraser 1940a)  . 

Current status. Valid.

Remarks. The “ type ” of Halecium diminutivum  , as designated by Fraser (1940a), is justifiably listed as a holotype in the online database of the NMNHAbout NMNH ( USNMAbout USNM 43438). Several other species of hydroids occur with the holotype, including sertulariids, sertularellids, symplectoscyphids, and campanulariids. A slide of the species, from the same sample and on the same substrate (a species of Sertularella  ), exists in the Fraser Hydroid Collection at the RBCMAbout RBCM ( BCPMAbout BCPM 976-00474-001). With the species having been based on a single specimen ( Fraser 1940a) from Nantucket Shoals, and with no subsequent records of the species having been reported from the type locality ( Fraser 1944a, 1947a), we consider the RBCMAbout RBCM material to be a fragment of the holotype (i.e., a schizoholotype).

This is a miniscule (to 1.2 mm high), easily overlooked, and poorly known species, reported only from two locations (the type locality of Nantucket Shoals, and also off Chatham Light) on the coast of Massachusetts, USA ( Fraser 1944a). The gonosome has yet to be described. Halecium diminutivum  is held to be valid in Cairns et al. (2002) and WoRMS.

NMNH

Smithsonian Institution, National Museum of Natural History

USNM

Smithsonian Institution, National Museum of Natural History

RBCM

Royal British Columbia Museum

BCPM

British Columbia Provincial Museum

Kingdom

Animalia

Phylum

Cnidaria

Class

Hydrozoa

Order

Leptothecata

Family

Haleciidae

Genus

Halecium

Loc

Halecium diminutivum Fraser, 1940a

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

2018
Loc

Halecium diminutivum

Fraser, 1940a : 578