Discodoris boholiensis, known commonly as the Bohol discodoris,[1] is a species of sea slug in the family Discodorididae.[2] It gets its name from the island of Bohol in the Philippines.[3] Discodoris boholiensis has a distinctive pattern of chocolate brown and cream-white all over its flattened body and wavy-edged mantle. It reaches a length of 12 cm (5 in).
The body of Discodoris boholiensis is roughly oval-shaped, with a wavy margin, broad and rather flattened, up to 12 cm (5 in) long and 8 cm (3 in) wide. The head is not clearly demarcated from the body. The rhinophores are dark brown, with a vertical white line on the anterior surfaces, and are able to retract into their sheaths; these are also dark brown and have wavy margins. The dorsal surface of the sea slug has a thicker longitudinal ridge, the visceral hump, in the centre; it is translucent and whitish, with irregular brown patches and spots. There are six external gills, which can also be retracted, of which the hind two are divided into two branches; the gills are brown with a distinctive pattern of white lines. The edge of the mantle is undulating, leathery and semi-rigid, streaked in dark brown and creamy-white, beige or yellowish, and dotted with dark brown and white speckles. On the underside of the animal, the foot is long and oval, being much narrower than the mantle, and has a dark brown edge.[4][1][5][6]
This species is widespread throughout the tropical waters of the Indo-Pacific region, from the eastern coasts of Africa and Madagascar to Japan, Papua New Guinea, New Caledonia and Australia. It occurs on reefs on both hard and soft substrates, among corals and under overhangs,[1] at depths down to about 15 m (50 ft).[7]
Discodoris boholiensis is nocturnal, spending the day in crevices, or other concealed locations, often with the mantle folded or contorted into strange shapes to make it fit. If caught in the open in daylight it will crawl rapidly across the sand, but when it moves about at night it does so much more slowly; this behaviour is known as photokinesis, although it is quite incapable of understanding why such a strategy might increase its chances of survival.[3] If attacked or disturbed, it readily autotomises, losing parts of its mantle and later regenerating the lost tissues. It feeds mainly on sponges. Like other dorid nudibranchs, it is a hermaphrodite. The genital opening is located on the right of the animal near the side and two individuals adopt a head to tail position for mating. Sperm is exchanged through a channel and fertilization is internal. The eggs are laid in the form of an orange-brown spiral gelatinous ribbon, deposited on a horizontal or vertical surface, which swells as it absorbs water.[1]
Discodoris boholiensis, known commonly as the Bohol discodoris, is a species of sea slug in the family Discodorididae. It gets its name from the island of Bohol in the Philippines. Discodoris boholiensis has a distinctive pattern of chocolate brown and cream-white all over its flattened body and wavy-edged mantle. It reaches a length of 12 cm (5 in).
Doris de Bohol
Discodoris boholiensis, communément nommé Doris de Bohol[2],[3], est une espèce de mollusques nudibranches du genre Discodoris.
Le Doris de Bohol se rencontre dans les eaux tropicales de l'Indo-ouest Pacifique, soit des côtes orientales de l'Afrique à la Papouasie-Nouvelle-Guinée[2],[4].
Son habitat est la zone récifale sur les plateaux et plus rarement sur les pentes dans des zones sablonneuses ou même de coraux morts dans une profondeur faible[2].
Cette espèce peut mesurer plus de 12 cm[2],[3].
Le manteau de cette espèce est très étendu, de forme globalement ovale au bords très ondulés. Le manteau est très fin et peut se rompre en cas d'agression sur le principe de l'autotomie.
Entre les rhinophores et le panache branchial, il y a une petite crête longitudinale qui constitue une caractéristique physique de l'espèce.
La couleur de fond du corps est blanche à crème avec des marbrures brun orangé le tout ponctué d'une multitude de petites papilles au sommet blanc.
Les bords de la jupe du manteau sont plus sombres et marqués à l'extrémité par un trait noir à brun foncé.
Les rhinophores et le bouquet branchial sont dans les tons brun-orangé mouchetés de petits points blancs.
Le pied n'est pas visible mais est de teinte similaire au corps.
Ce Nudibranche est benthique et nocturne[5].
Discodoris boholiensis se nourrit principalement d'éponges[5].
Doris de Bohol
Discodoris boholiensis, communément nommé Doris de Bohol,, est une espèce de mollusques nudibranches du genre Discodoris.
Discodoris boholiensis is een slakkensoort uit de familie van de Discodorididae.[1] De wetenschappelijke naam van de soort is voor het eerst geldig gepubliceerd in 1877 door Bergh.
Bronnen, noten en/of referenties
Discodoris boholiensis là một loài sên biển mang trần thuộc nhánh Doridacea, là động vật thân mềm chân bụng không vỏ sống ở biển trong họ Discodorididae.[2] Bohol discodoris phân bố khắp nơi ở các vùng biển nhiệt đới của Ấn Độ Dương-Tây Thái Bình Dương, từ các bờ biển đông của châu Phi đến Papua New Guinea.[3][4]
Thân đạt chiều dài 12 xentimét (4,7 in).[3][5][6]
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Bài viết về Lớp Chân bụng này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn. Discodoris boholiensis là một loài sên biển mang trần thuộc nhánh Doridacea, là động vật thân mềm chân bụng không vỏ sống ở biển trong họ Discodorididae. Bohol discodoris phân bố khắp nơi ở các vùng biển nhiệt đới của Ấn Độ Dương-Tây Thái Bình Dương, từ các bờ biển đông của châu Phi đến Papua New Guinea.
Thân đạt chiều dài 12 xentimét (4,7 in).
