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Original Description: Chromodoris maculosa Pease 1871

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Animal subcylindrical, elongate, narrow, smooth, flaccid, sub- pellucid. Mantle dilated in front and rounded behind, sides nearly parallel. Cervical tentacles large, sub-erect on stout bases, elongate oval, laminae deeply incised, retractile into simple cavities. Branchial star moderately developed, consisting of eight sub-erect, lanceolate, narrow pinnate plumules, connate at their bases, and retractile into a common simple cavity. Vent, a simple orifice. Labial tentacles small, finger-shaped. Foot elongate, narrow, truncately rounded and fissured in front; acutely rounded and projecting far beyond the body posteriorly. Color cream yellow, margined with fulvous, on which there is a series of abbreviate reddish lines, three irregular radiating, fulvous lines, extending from the front margin of the mantle toward the tentacles; lineated longitudinally with opaque white, line four, the two median encircle the branchiae and pass between the dorsal tentacles, which they partly encircle, the two lateral lines extend from the tentacles to the posterior end of the body; the spaces between the lines dotted with purple. Cervical tentacles pale, a broad brownish red zone just below the apex. Branchial plumules pale slate color tipped with red. Upper surface of the foot and under sides of the mantle lineated same as above, and dotted with violet, the former shaded with violet beneath and along the upper margin, and the latter marginated with dingy red. Length, one and a half inch. Habitat, Tahiti. Station, (under stones at low water. A.G.)
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Hypselodoris maculosa

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Hypselodoris maculosa is a species of sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.[2][3]

Distribution

This nudibranch was described from Tahiti. It was thought to be widespread in the tropical Indo-Pacific Ocean with considerable variation in colour pattern.[3] A study employing DNA sequencing and more careful comparison of morphological differences revealed that many of these colour variations were in fact separate species.[4]

Description

Hypselodoris maculosa has a cream body with a brown margin to the mantle and four longitudinal white lines on its dorsum. There are slightly elongate dark purple-black spots in single irregular rows between the white lines. The brown margin is partly edged in white but extends in patches into the back with clusters of dark spots in these patches. The anterior end of the mantle and the part behind the gills are light-purple in colour with white and dark purple spots. The rhinophores are white, with a broad brown band just above the start of the lamellae and a narrow orange band above this. The gill leaves are brown basally, then white, with orange tips.[4][5][6] It can be distinguished from Hypselodoris decorata by having two instead of three rings on the rhinophores and details of the colouration. Hypselodoris yarae, Hypselodoris paradisa, Hypselodoris juniperae and several other species have previously been confused with Hypselodoris maculosa.[4]

This species can reach a total length of at least 32 mm[1] and has been observed feeding on grey sponges from the genus Euryspongia.[7]

References

  1. ^ a b Pease, W.H. (1871). "Descriptions of new species of nudibranchiate Mollusca inhabiting Polynesia". American Journal of Conchology 7(1): 11-19, Pls. 3-9, p. 16, pl. 7 figs 1a, 1b, 1c, 1d.
  2. ^ MolluscaBase (2018). Hypselodoris maculosa (Pease, 1871). Accessed on 2019-01-11.
  3. ^ a b Rudman, W.B., 2003 (October 4) Hypselodoris maculosa (Pease, 1871). [In] Sea Slug Forum. Australian Museum, Sydney.
  4. ^ a b c Epstein, H. E.; Hallas, J. M.; Johnson, R. F.; Lopez, A.; Gosliner, T. M. (2018). Reading between the lines: revealing cryptic species diversity and colour patterns in Hypselodoris nudibranchs (Mollusca: Heterobranchia: Chromodorididae). Zoological Journal of the Linnean Society. 2018, XX, 1–74. With 40 figures.
  5. ^ Gosliner, T.M., Behrens, D.W. & Valdés, Á., 2018. Nudibranch and Sea Slug Identification - Indo-Pacific. New World Publications; 2nd Revised, Updated edition. 452 pp. ISBN 1878348671, ISBN 978-1878348678, p. 185
  6. ^ Johnson, S. & Johnson, J., 2018. Hypselodoris maculosa Underwater Kwajalein, accessed 2018-01-11.
  7. ^ Rudman, W.B., 2007 (Oct 16). Comment on Hypselodoris maculosa feeding by Bruce Wilkie. [Message in] Sea Slug Forum. Australian Museum, Sydney.

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Hypselodoris maculosa: Brief Summary

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Hypselodoris maculosa is a species of sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.

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Hypselodoris maculosa ( French )

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Hypselodoris maculosa est une espèce de nudibranche du genre Hypselodoris.

Distribution

Cette espèce se rencontre dans la zone tropicale Indo/Ouest-Pacifique.

Habitat

Son habitat est la zone récifale externe, sur les sommets ou sur les pentes jusqu'à la zone des 30 m de profondeur.

Description

Cette espèce peut mesurer plus de 3 cm.

Le corps est allongé et de forme ovale, la jupe du manteau est étroite sauf sur la face antérieure ou elle forme un voile au-dessus de la cavité buccale.

Le pied dépasse sur la partie antérieure formant une pointe.

Les motifs et la coloration de la livrée sont très variées.

Le dessus du manteau est généralement orange-crème à blanc-crème avec de fines lignes blanches longitudinales et est constellé d'une certaine quantité de points pourpres.

Les franges latérales du manteau peuvent comporter une bande orange au bords internes ondulés, les deux bordures internes et externes sont dotées de pointillés espacés pourpres.

Les bords antérieurs et postérieurs ainsi que la queue du pied sont mauves à pourpres avec des points blanc.

Les rhinophores sont lamellés, leur base est translucide et la partie supérieure est blanchâtre avec d'une à trois bandes circulaires orange.

Le bouquet branchial est blanchâtre et surligné d'orange.

Éthologie

Cet Hypselodoris est benthique et diurne ; il se déplace à vue sans crainte d'être pris pour une proie de par la présence de glandes défensives réparties dans les tissus du corps.

Alimentation

Hypselodoris maculosa se nourrit principalement d'éponges.

Notes et références

  1. Pease W.H. (1871) Descriptions of new species of Nudibranchiate mollusca inhabiting Polynesia. Nº2. American Journal of Conchology 7(1): 11-19, pls. 3-9.

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Hypselodoris maculosa: Brief Summary ( French )

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Hypselodoris maculosa est une espèce de nudibranche du genre Hypselodoris.

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Hypselodoris maculosa ( Italian )

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Hypselodoris maculosa (Pease, 1871) è un mollusco nudibranchio della famiglia Chromodorididae.[1]

Biologia

Si nutre di spugne della specie Dysidea fragilis (Dysideidae).[2]

Distribuzione e habitat

La specie è diffusa nell'oceano Indiano e nel Pacifico occidentale.

Note

  1. ^ (EN) MolluscaBase eds. 2020, Hypselodoris maculosa (Pease, 1871), in WoRMS (World Register of Marine Species). URL consultato il 1/10/2020.
  2. ^ (EN) Gary R. McDonald, James W. Nybakken, A List of the Worldwide Food Habits of Nudibranchs, in University of California Santa Cruz.

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Hypselodoris maculosa: Brief Summary ( Italian )

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Hypselodoris maculosa (Pease, 1871) è un mollusco nudibranchio della famiglia Chromodorididae.

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Hypselodoris maculosa ( Dutch; Flemish )

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Hypselodoris maculosa is een slakkensoort uit de familie van de Chromodorididae.[1] De wetenschappelijke naam van de soort is voor het eerst geldig gepubliceerd in 1871 door Pease.

Bronnen, noten en/of referenties
  1. Caballer, M. (2012). Hypselodoris maculosa (Pease, 1871). Geraadpleegd via: World Register of Marine Species op http://www.marinespecies.org/aphia.php?p=taxdetails&id=209597
Geplaatst op:
09-03-2013
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