{"id":2233,"date":"2012-08-29T17:23:32","date_gmt":"2012-08-29T15:23:32","guid":{"rendered":"https:\/\/opistobranquis.info\/thordisa-filixthordisa-filixthordisa-filix"},"modified":"2023-03-26T11:09:59","modified_gmt":"2023-03-26T09:09:59","slug":"thordisa-filix","status":"publish","type":"page","link":"https:\/\/opistobranquis.info\/en\/guia\/doridida\/doridoidei\/doridoidea\/thordisa-filix\/","title":{"rendered":"Thordisa filix"},"content":{"rendered":"

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Thordisa filix <\/em>Pruvot-Fol, 1951<\/h3>\n

\"Thordisa<\/div>
Thordisa filix<\/em> by Manuel Ballesteros<\/center><\/span>

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WoRMS Taxonomic Information<\/h3>
Current accepted name: Thordisa filix<\/em> Pruvot-Fol, 1951<\/strong><\/div>

Current classification<\/h4>
Superdomain<\/th>Biota<\/a><\/td><\/tr>
Kingdom<\/th>Animalia<\/a><\/td><\/tr>
Phylum<\/th>Mollusca<\/a><\/td><\/tr>
Class<\/th>Gastropoda<\/a><\/td><\/tr>
Subclass<\/th>Heterobranchia<\/a><\/td><\/tr>
Infraclass<\/th>Euthyneura<\/a><\/td><\/tr>
Subterclass<\/th>Ringipleura<\/a><\/td><\/tr>
Superorder<\/th>Nudipleura<\/a><\/td><\/tr>
Order<\/th>Doridida<\/a><\/td><\/tr>
Infraorder<\/th>Doridoidei<\/a><\/td><\/tr>
Superfamily<\/th>Doridoidea<\/a><\/td><\/tr>
Family<\/th>Discodorididae<\/a><\/td><\/tr>
Genus<\/th>Thordisa<\/em><\/a><\/td><\/tr>
Species<\/th>Thordisa filix<\/em> Pruvot-Fol, 1951<\/a><\/td><\/tr><\/table>

Classification provided by the World Register of Marine Species (WoRMS). [139591<\/a>]<\/p><\/div>Description<\/strong>
\nThis species can reach 40 mm in length, but usually the cited specimens measure between 15 and 25 m in length. The color of the animal is a more or less homogeneous yellow with 1-2 dark areas in the mantle due to internal viscera, however, some specimens are coloured in lighter shades. The dorsum has numerous conical or slightly digitiform (finger like) tubercles and other filiform (thread like) tubercles sparser and coloured brown at the tip, forming a line of 5-6 tubercles in the center of the dorsum. The dorsum is very spiculous, as are the tubercles, which have spicules on their base in a starry arrangement. The rhinophores are yellow but have a thin brown pigmentation in the lamellae, the apex is whitish; the rhinophoric sheath is rather high and its upper edge is tuberculate. The gill consists of four tripinnate gill leaves that remain high and growing from a single basal protuberance; they are thin and semitransparent but with a light brown raquis. Branchial sheath is slightly raised and its upper edge is also tuberculate. In the center of the gill leaves lies the anal papilla, which is quite high, brownish and with 6-8 lobulations with rounded tips. The foot is relatively narrow, coloured uniform yellow and is furrowed and cleft on the front side. The mouth is located in a highly developed oral protuberance and has two whitish elongated labial palps. The genital orifice is very apparent and it is positioned on the underside of the mantle, to the right of the body.<\/p>\n

Biology<\/strong>
\nThis is a species living at a certain depth on the continental shelf, so it is difficult to observe by scuba diving. Very few details of its biology are known. Most of the known specimens have been collected by commercial trawling on soft or maerl bottoms at depths of 40-150 m. Schmekel cites that the spawn is an spiral ribbon with yellow eggs of about 120 microns. It’s supposed to feed on sponges, like other species of the same genus.<\/p>\n

Etymology<\/strong><\/p>\n