Last update: May 15, 2014
Extended specimens up to about 20 mm, diameter 0.3 to 0,7 mm.
Lophophore horseshoe-shaped, without significant coiling. Up to 170 tentacles, length 2-3.5 mm .
Nephridia (205-324 μm long) with a single funnel, with a short descending branch and a long ascending one; nephridiopore on anal papilla opening below anus for the left one and at anus level for the right one.
A single giant nerve fibre, on the left side at the level of the attachment of the left lateral mesentery to the body wall, 16-36 μm in diameter.
Longitudinal muscle bundles of feathery type; the mean formula and general formula are respectively:
|20 | 21
11 | 12
||18-23 | 16-24
10-13 | 11-13
||n= 7 individuals)
Sexual reproduction: no data.
Phoronis emigii is embedded vertically in a sandy sediment, at 33 m depth, densities aboutto 90 individuals/100 cm-2.
Etymology: the specific name, a masculine noun in the genitive case, is in honor of the French researcher Dr. Christian C. Emig for his remarkable contributions to lophophorate systematics.
Japanese name: Amakusa-houkimushi
The distribution of Phoronis emigii is represented below on the map.
Type-locality: Tomiaka Bay (Amakusa, Japon) - 32°32'27"N, 130°03'17"E, 33 m depth.
© Christian C. Emig
Last update: May 14, 2014