The Morphology of the Naupliar Stages of Sacculina carcini(Crustacea: Cirripedia: Rhizocephala)

A morphological study was carried out on the fournaupliar stages of Sacculina carciniusing mainly scanning electron microscopy. Frontal horns were present and throughout development the typical nauplius limbs remained simple and gnathobases were lacking. Such features are characteristic of other lecithotrophic barnacle nauplii. The presence of a vestigial ventral thoracic process was evident on the stage III nauplius and was even more prominent on the stage IV nauplius. These observations confirm that the rhizocephalan nauplius is close to the thoracican nauplius form and lend strong support for the retention of the Rhizocephala within the Cirripedia.

[1]  J. Høeg.  "Akentrogonid" host invasion and an entirely new type of life cycle in the rhizocephalan parasite Clistosaccus paguri (Thecostraca : Cirripedia) , 1990 .

[2]  G. Walker.  Observations on the larval development of Sacculina carcini (Crustacea: Cirripedia: Rhizocephala) , 1988, Journal of the Marine Biological Association of the United Kingdom.

[3]  J. Hoeg,et al.  Male Cypris Metamorphosis and a New Male Larval Form, The Trichogon, in the Parasitic Barnacle Sacculina carcini (Crustacea: Cirripedia: Rhizocephala) , 1987 .

[4]  D. Anderson.  The larval musculature of the barnacle Ibla quadrivalvis Cuvier (Cirripedia, Lepadomorpha) , 1987, Proceedings of the Royal Society of London. Series B. Biological Sciences.

[5]  G. Walker.  Further studies concerning the sex ratio of the larvae of the parasitic barnacle, Sacculina carcini Thompson , 1987 .

[6]  D. Anderson,et al.  LARVAL DEVELOPMENT OF BALANUS AMPHITRITE DARWIN AND BALANUS VARIEGATUS DARWIN (CIRRIPEDIA, BALANIDAE) FROM NEW SOUTH WALES, AUSTRALIA , 1986 .

[7]  G. Walker.  The cypris larvae of Sacculina carcini Thompson (Crustacea: Cirripedia: Rhizocephala) , 1985 .

[8]  J. Lützen.  Growth, reproduction, and life span in Sacculina carcini Thompson (Cirripedia: Rhizocephala) in the Isefjord, Denmark , 1984 .

[9]  J. Høeg.  Size and settling behaviour in male and female cypris larvae of the parasitic barnacle Sacculina carcini Thompson (Crustacea: Cirripedia: Rhizocephala) , 1984 .

[10]  B. Foster.  THE MARINE FAUNA OF NEW-ZEALAND BARNACLES CIRRIPEDIA THORACICA , 1978 .

[11]  P. Rainbow,et al.  The Feeding Apparatus of the Barnacle Nauplius Larva: A Scanning Electron Microscope Study , 1976, Journal of the Marine Biological Association of the United Kingdom.

[12]  Dt Anderson.  Embryonic and larval development and segment formation in Ibla quadrivalivis Cuv. (Cirripedia). , 1965 .

[13]  M. J. Mackerras,et al.  The life history of the rat lung-worm, Angiostrongylus cantonensis (Chen) (Nematoda: Metastrongylidae) , 1955 .

[14]  E. Knight-Jones,et al.  On the Larval Development of Elminius Modestus Darwin , 1949, Journal of the Marine Biological Association of the United Kingdom.

[15]  W. E. Frost.  The Nauplius Larva of Anelasma squalicola (Lovén) , 1928, Journal of the Marine Biological Association of the United Kingdom.

[16]  Geoffrey Smith.  Memoirs: The Fixation of the Cypris Larva of Sacculina carcini (Thompson) upon its Host, Carcinus mænas , 1907 .

[17]  A. Giard.  XLI.—Parasitic castration, and its influence upon the external characters of the male sex, in the Decapod Crustacea , 1887 .