Krohn, 1852

Description
— Gonozooid small, with an upright, U-shaped intestine. The gill slits are not extensive, dorsally and ventrally attached at M5 and only slightly curved backwards reaching M6 or a little bit beyond. The spherical testis lies in a ventral pocket that slightly extrudes the body between M5 and M6. The frontal end of the endostyle is between M2 and M3; the caudal end is just in front of M5. The dorsal nerve ganglion is located between M3 and M4.

Size
Length ca. 4 mm.

Depth range

Distribution in the North Sea
Rare in the Norther North Sea, as a visitor from warm waters.

World distribution
Northern, Central and temperate SE Atlantic Ocean, tropical and temperate SW Indian Ocean, E Central Pacific, Mediterranean Sea.

Kingdom Animalia
Phylum Chordata
Subphylum Tunicata
Class Thaliacea
Order Doliolida
Family Doliolidae
Genus Doliolina
Species Doliolina muelleri

Status in World Register of Marine Species

Accepted name: Doliolina muelleri (Krohn, 1852)

Scientific synonyms and common names

Doliolina muelleri var. krohni | Borgert, 1933

Fraser, J.H., 1981. British pelagic tunicates. Synopses of the British Fauna (New Series), No. 20. Cambridge University Press, Cambridge. 57 pp.

Godeaux, J., Q. Bone and J.-C. Braconnot, 1998. Anatomy of Thaliacea. In: Q. Bone (ed.), 1998. The biology of pelagic tunicates. Oxford University Press, Oxford. pp 1-24.

Godeaux, J., 1998. The relationships and systematics of the Thaliacea, with keys for identification. In: Q. Bone (ed.), 1998. The biology of pelagic tunicates. Oxford University Press, Oxford. pp 273-294.

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