Sigillina australis Savigny, 1816

Kott, Patricia, 2008, Ascidiacea (Tunicata) from deep waters of the continental shelf of Western Australia, Journal of Natural History 42 (15 - 16), pp. 1103-1217: 1128

publication ID

http://doi.org/ 10.1080/00222930801935958

persistent identifier

http://treatment.plazi.org/id/E8619D71-2D5B-4237-FE0E-FDFCFCEDF941

treatment provided by

Felipe

scientific name

Sigillina australis Savigny, 1816
status

 

Sigillina australis Savigny, 1816  

Sigillina australis Savigny 1816, p. 179   . Kott 1990a, p. 87.

Distribution

Previously recorded (see Kott, 1990a): Western Australia (Montebello I. to Albany); South Australia (Great Australian Bight, Investigator Strait); New South Wales ( Port Jackson to Nelson’s Bay ); New Zealand ( North Island ). New records: Western Australia CSIRO SS10 View Materials /05 (Albany, Stn 26, 212 m, 23.11.05, QM G328438; Kalbarri, Stn 96, 4,12,05, 435 m, QM G328473- 5 specimens; Kalbarri, Stn 102, 96– 98 m, 05.12.05, QM G328445; Shark Bay , Stn 115, 120 m, 7.12.05, QM G328136, QM G328142; Shark Bay, Stn 116, 100 m, 07.12.05, QM G328135; Shark Bay, Stn 118, 100 m, 07.12.05, QM G328134; Carnarvon, Stn 124, 100 m, 08.12.05, QM G328145)   .

Description

The heads of the colonies of the present specimens are often relatively short, and the stalks sometimes longer and thinner than those of Sigillina cyanea   (which the present species closely resembles in its colony and zooid form). However, it lacks the characteristic colour of the latter species and is more or less grey or colourless in preservative.

The newly recorded specimens from Kalbarri appear to have been dried, although a large larva was detected in a brood pouch at the postero-dorsal corner of the thorax of zooids that otherwise had disintegrated. The larval trunk is 0.9 mm long and there are two vertically elongated antero-median adhesive organs. The tail is wound only halfway around the trunk. Other organs were not detected.

Remarks

The species has a similar range to that of S. cyanea   , although its range is not interrupted across the Great Australian Bight and it also has been recorded from North Island ( New Zealand). Generally, this species appears to be a temperate one extending into the tropics on the western Australian coast, while S. cyanea   has a characteristically tropical range extending into temperate waters in south-western Australia and onto the central New South Wales coast on the eastern seaboard of the continent.

CSIRO

Australian National Fish Collection

QM

Queensland Museum

Kingdom

Animalia

Phylum

Chordata

Class

Ascidiacea

Order

Aplousobranchia

Family

Holozoidae

Genus

Sigillina

Loc

Sigillina australis Savigny, 1816

Kott, Patricia 2008
2008
Loc

Sigillina australis

Kott P 1990: 87
Savigny JC 1816: 179
1816