Synthecium nanum Fraser, 1943a

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: 50

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-FFD7-FFD5-AEC1-5BCC1AE0F865

treatment provided by

Plazi

scientific name

Synthecium nanum Fraser, 1943a
status

 

Synthecium nanum Fraser, 1943a 

Sertularia tubitheca  Αllman, 1877: 24, pl. 16, figs. 5, 6.

Synthecium tubithecum  .— Jäderholm, 1903: 291, pl. 13, fig. 7.

Synthecium nanum Fraser, 1943a: 80  , pl. 18, fig. 10.

Holotype. MCZ-IZ 9003: USA, Florida, W of the Dry Tortugas, 24°36’40”N, 83°02’20”W, 22 January 1868, 16 fm (29 m), Pourtalès Gulf Stream Exploration, Steamer Bibb, one colony, 3 mm high, with three hydrothecal pairs, in only fair condition, on stem of Thyroscyphus marginatus (Allman, 1877)  , without gonophores, coll. L.F. de Pourtalès, labelled “ type ”; ethanol.

Type locality. USA, Florida: off Dry Tortugas, 24°36’40”N, 83°02’20”W, 16 fm (29 m), Pourtalès Gulf Stream Exploration ( Fraser 1943a).

Current status. Invalid.

Remarks. Fraser (1943a) described Synthecium nanum  from a collection of hydroids at the MCZAbout MCZ. No types of it were designated therein by him, but the species is based on known material (MCZ-IZ 9003). Little data are included with this hydroid in the current online database of the MCZAbout MCZ, and the number of specimens is unstated. However, in a very brief account, Fraser (1943a) described the hydroid as “…consisting of a single, unbranched, erect stem…” No other type material of the species is known to exist. The type, examined during this study, is indeed a single small colony. It is therefore the holotype by monotypy.

Synthecium nanum  is, as noted earlier (Calder 1991), a junior subjective synonym of S. tubithecum (Allman, 1877)  . Fraser’s (1943a) hydroid was originally found in the same sample as Allman’s (1877) type of S. tubithecum  . The specimen is considered a juvenile colony of that well-known species.

MCZ

Museum of Comparative Zoology

Kingdom

Animalia

Phylum

Cnidaria

Class

Hydrozoa

Order

Leptothecata

Family

Syntheciidae

Genus

Synthecium

Loc

Synthecium nanum Fraser, 1943a

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

2018
Loc

Synthecium tubithecum

Jäderholm, 1903 : 291

Loc

Synthecium nanum

Fraser, 1943a : 80