Marine Biology

, Volume 152, Issue 3, pp 733–744 | Cite as

Larval development of Lightiella magdalenina (Crustacea, Cephalocarida)

  • Alberto Addis
  • Francesca Biagi
  • Antonello Floris
  • Emiliana Puddu
  • Marcella CarcupinoEmail author
Research Article


The larval development of the newly discovered cephalocarid from Mediterranean sea, Lightiella magdalenina, was analysed using light and scanning electron microscopy. Twenty-nine larval specimens, divided into 15 metanaupliar and 2 juvenile stages of development, were found. The first six metanaupliar stages had an even number (6, 8, 10, 12, 14 and 16) of trunk segments including telson. The condition of 20 trunk segments, typical of the adult, was reached after another 4 stages by the addition of a single segment per stage. At this tenth stage, the larvae had an incomplete number of trunk limbs. Another five stages were needed to complete the cephalic appendage development, passing from the metanaupliar to the juvenile stage, characterized by loss of the naupliar enditic process of the second antenna. Trunk limbs development was completed during the last two juvenile stages. According to the ontogenetic data reported for Hutchinsoniella macracantha and Lightiella incisa, these seventeen stages probably do not represent the complete developmental series. Nevertheless, they allow us to clarify the main features of cephalocarid ontogeny and show specific differences in the development of both the trunk segments and appendages.


Distal Segment Preceding Stage Trunk Segment Apical Seta Setal Formula 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This work was financially supported by an ex60% grant from the University of Sassari, COFIN MIUR 2004, coord. University Rome 3, European Community INTERREG III, and in part, by funds from the PADI Foundation. We thank Mr. Salvatore Marceddu of the Electron Microscopy Centre of Sassari University for his expert technical assistance. We also thank the La Maddalena Archipelago National Park for its logistic and technical support during the collection of specimens.


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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Alberto Addis
    • 1
  • Francesca Biagi
    • 1
  • Antonello Floris
    • 1
  • Emiliana Puddu
    • 1
  • Marcella Carcupino
    • 1
    Email author
  1. 1.Dipartimento di Zoologia e Genetica EvoluzionisticaSassariItaly

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