Halecium delicatulum Coughtrey, 1876

Schuchert, Peter, 2005, Taxonomic revision and systematic notes on some Halecium species (Cnidaria, Hydrozoa), Journal of Natural History 39 (8), pp. 607-639: 629-631

publication ID

http://doi.org/ 10.1080/00222930400001319

persistent identifier

http://treatment.plazi.org/id/4B6087F1-8B5D-FFD2-CBD8-FC02FEB2FF46

treatment provided by

Carolina

scientific name

Halecium delicatulum Coughtrey, 1876
status

 

Halecium delicatulum Coughtrey, 1876  

( Figure 12 View Figure 12 ) Halecium delicatulum Coughtrey 1876, p 26   , Plate 3 Figures 4 View Figure 4 , 5 View Figure 5 ; Ralph 1958,

p 334, Figures 11e View Figure 11 , h–n, 12a–p, synonymy; Vervoort 1972, p 27, Figures 4 View Figure 4 , 5 View Figure 5 ;

Watson 1973, p 166; Millard 1975, p 145, Figure 47F–L; Stepanjants 1979, p 105,

Plate 20, Figure 4A, B View Figure 4 ; Rees and Vervoort 1987, p 25, Figure 5 View Figure 5 , synonymy;

Genzano 1990, p 38, Figure 2–5 View Figure 2 View Figure 3 View Figure 4 View Figure 5 ; Hirohito 1995, p 20, Figure 5 View Figure 5 a–c, Plate 1 Figure c; Migotto 1996, p 30, Figure 6d, e View Figure 6 ; Vervoort and Watson 2003, p 88, Figures 15 View Figure 15 I–L, 16A–E.

Halecium gracile Bale 1888, p 759   , Plate 14, Figures 1–3 View Figure 1 View Figure 2 View Figure 3 .

[Not Halecium gracile Verrill 1874   .]

Halecium   parυulum Bale 1888, p 760, Plate 14 Figures 4 View Figure 4 , 5 View Figure 5 ; Millard 1957, p 189, Figure 4A View Figure 4 ; Vervoort 1959, p 227, Figure 7 View Figure 7 .

Halecium flexile Allman 1888, p 11   , Plate 5 Figure 2 View Figure 2 .

Not Halecium flexile: Fraser 1914, p 165   , Plate 20 Figure 71; Fraser 1937, p 104, Plate 21 Figure 111; Fraser 1944, p 192, Figure 169 [5 Halecium fraseri Ralph 1958   ].

Halecium balei Fraser 1911, p 46   , new name.

Halecium flexile var. japonica Leloup 1938, p 4   , Figure 1 View Figure 1 .

Not Halecium delicatulum: Leloup 1960, p 218   , Figure 1B View Figure 1 .

Not Halecium   parυulum f. macrothecum Leloup 1960, p 218, Figure 1B View Figure 1 .

Not Halecium   parυulum var. magnum Millard 1957, p 190   , Figure 4 View Figure 4 B–O.

Material examined

MHNG INVE 26669, New Zealand, Wellington, Te Raekaihau, coll. 1994 by P. Schuchert, fertile female.

Characteristics

Colony 1.5 cm, monosiphonic, morphology and dimensions of trophosome indistinguishable from H. mediterraneum   described above. Female gonotheca slightly larger (1 mm), body more rounded, distal opening on a distinct protrusion, notch of opening narrower, 20– 22 eggs, egg diameter about 0.09–0.12 mm. Colour of colonies according to Coughtrey (1876) pale and transparent.

Distribution

Reportedly cosmopolitan ( Peña Cantero and García Carrascosa 2002), not in Arctic regions (see below). Type localities: Halecium delicatulum, Dunedin Harbour   , New Zealand; Halecium gracile, Port Stephens and Port Jackson   , Australia; Halecium   parυulum, Bondi Bay, Sydney, Australia; Halecium flexile, Marion   Island, southern Indian Ocean; Halecium flexile var. japonica, Sagami Bay   , Japan.

Remarks

See discussion under H. mediterraneum   . Halecium delicatulum   has been reported to occur in nearly all oceans and is thus considered cosmopolitan ( Peña Cantero and García Carrascosa 2002). The descriptions of some records, however, are quite distinct and suggest that some belong to different species. Halecium   parυulum var. magnum Millard, 1957   forms large, stiff, highly polysiphonic colonies. The dimensions of the hydrothecae and gonothecae are significantly larger. The female gonothecae have a different shape and contain a reduced hydranth. Mature gonothecae have only three to four large eggs. Because both morphotypes occur sympatrically in South Africa, Halecium   parυulum var. magnum   should be regarded as specifically distinct from H. delicatulum   .

The infertile material from the Arctic Sea described by Leloup (1960) is very unlikely to be H. delicatulum   . Better guesses may be H. minutum Broch, 1903   or H. textum Kramp, 1911   (see below).

MHNG

Museum d'Histoire Naturelle

Kingdom

Animalia

Phylum

Cnidaria

Class

Hydrozoa

Order

Leptothecata

Family

Haleciidae

Genus

Halecium

Loc

Halecium delicatulum Coughtrey, 1876

Schuchert, Peter 2005
2005
Loc

Halecium delicatulum:

Leloup 1960: 218
1960
Loc

Halecium fraseri

Ralph 1958
1958
Loc

var. magnum

Millard 1957: 190
1957
Loc

Halecium flexile var. japonica

Leloup 1938: 4
1938
Loc

Halecium flexile:

Fraser 1914: 165
1914
Loc

Halecium balei

Fraser 1911: 46
1911
Loc

Halecium gracile

Bale 1888: 759
1888
Loc

Halecium flexile

Allman 1888: 11
1888
Loc

Halecium gracile

Verrill 1874
1874
Loc

Halecium

Oken 1815
1815
Loc

Halecium

Oken 1815
1815
Loc

Halecium

Oken 1815
1815