Molgula dione, (SAVIGNY, 1816)

Monniot, Claude, 2002, Stolidobranch ascidians from the tropical western Indian Ocean, Zoological Journal of the Linnean Society 135 (1), pp. 65-120 : 115

publication ID

https://doi.org/ 10.1046/j.1096-3642.2002.00017.x

persistent identifier

https://treatment.plazi.org/id/436F3F3C-FFE2-FF9C-FF26-FE11FC95193A

treatment provided by

Carolina

scientific name

Molgula dione
status

 

MOLGULA DIONE ( SAVIGNY, 1816) View in CoL ( Fig. 38 View Figure 38 )

Cynthia dione Savigny, 1816: 93 View in CoL , 153, pl. 7, fig. 1, –

Red Sea. Ctenicella dione: Harant, 1927: 366 , – Suez. Molgula dione: Van Name, 1952: 218 View in CoL , – Aqaba Gulf. Molgula somaliensis Millar, 1988: 845 View in CoL , figs 10,30m, –

Somalia.

Material

Yemen, Socotra Island, coll. C. Monniot, 1997. Description

The single specimen collected is spherical, 26 mm in diameter, entirely embedded with sand and broken shells, making the thin tunic brittle. The siphons are short, close to each other, not protruding.

The body wall is thin. The musculature is limited to the siphonal sphincters and to strong but short longitudinal fibres that do not extend beyond the siphonal bases ( Fig. 38A,B View Figure 38 ). The thick oral tentacles arise at the base of a velum and have two orders of ramifications. The prepharyngeal band forms a wide and deep dorsal V. The slit in the dorsal tubercule is in shape of a C opening anteriorly, with the end of the left horn curved in and the end of the right horn curved out ( Fig. 38C View Figure 38 ).

The short dorsal lamina increases in height posteriorly. The branchial sac has seven folds on each side. The infundibula are constituted of two spiral stigmata wound in opposite ways. The formula on the right side is:

Kingdom

Animalia

Phylum

Chordata

Class

Ascidiacea

Order

Stolidobranchia

Family

Molgulidae

Genus

Molgula

Loc

Molgula dione

Monniot, Claude 2002
2002
Loc

Cynthia dione

Savigny JC 1816: 93
1816
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