Home|Search|Identify|Taxonomic tree|Quiz|About this site|Feedback
Developed by ETI BioInformatics
Characteristics, distribution and ecology
Taxonomische classification
Synonyms and common names
Literature references
Images, audio and video
Links to other Web sites

Stephens, 1920

Species Overview

Lissodendoryx (Ectyodoryx) atlantica (Stephens, 1921) is a thinly encrusting deep water species recorded from 75 m off Roscoff. It is ill-known. Identification is only possible with microscopic examination.

Taxonomic Description

Colour: Unknown.
Shape, size, surface and consistency: Thinly encrusting sheet of 3 cm in diameter, 1-3 mm in thickness. Slightly raised oscular papillae
Spicules: Megascleres: The ectosomal spicules are strongyles, with rather unequal ends, one end being slightly thicker than the other; the shaft is often a little crooked; size is 400-500 x 6 µm. Large acanthostyles have a slightly curved shaft; the head is swollen and is covered with short, blunt spines. A few spines are sometimes scattered along the shaft for a short distance; on the other hand, some of the spicules are almost quite smooth; these spicules measure about 660-950 x 15-21 µm. The echinating acanthostyles are small and few in number; the shaft is straight, the head is a little swollen and is covered with rather long spines; the shaft is thickly set with small, recurved spines; size is 100-140 x 10 µm.
Microscleres: Arcuate isochelae; the shaft is fairly strongly curved; it is about 10 µm in breadth in front view; the teeth are rather short; the chelae measure 45-60 µm.
Skeleton: The ectosomal spicules form thick bundles, arranged tangentially; there are large quantities of microscleres at the surface. The main skeleton consists of a network of large acanthostyles lying usually 3 or 4 together, sparingly echinated by small acanthostyles. A small quantity of spongin is present.
Reproduction: August.
Ecology: Deep water, from 75 m downwards, on stones.
Distribution: W coast of Ireland, Roscoff.
Type specimen information: BMNH 1910.1.1.901 (dry). Co-type. Norman Collection + BMNH 1953.11.11.117 (slide).


This is a deep water species recorded from 75 m off Roscoff. It is ill-known. The subgenus Lissodendoryx (Ectyodoryx) may be distinguished from Hymedesmia and Phorbas by its reticulate skeleton.
Source: Stephens, 1920.

Lissodendoryx atlantica