Reproduction in a carnivorous sponge: the significance of the absence of an aquiferous system to the sponge body plan.

@article{Riesgo2007ReproductionIA,
  title={Reproduction in a carnivorous sponge: the significance of the absence of an aquiferous system to the sponge body plan.},
  author={Ana Riesgo and Chantel A Taylor and Sally P Leys},
  journal={Evolution & development},
  year={2007},
  volume={9 6},
  pages={618-31}
}
Sponges usually produce, release, and capture gametes via the aquiferous system, and so the absence of both choanocytes and an aquiferous system in the carnivorous sponge Asbestopluma occidentalis has led to unusual characteristics of development for this Phylum. Sperm are highly specialized elongate cells tightly packed into spermatic cysts in the peripheral tissue of the sponge. Mature spermatozoa have proacrosomal vesicles at the anterior end and a ciliary pit surrounding the flagellum… CONTINUE READING