Neoophora

Neoophora is a group of rhabditophoran flatworms with ectolecithal eggs, i.e., yolk is not present in the egg as in most animals, but rather is secreted by accessory glands called vitellaria or yolk glands. These glands have the same embryonic origin as the ovaries, but usually constitute a separate organ in adult animals.[1]

Neoophora
Scientific classification
Kingdom: Animalia
Phylum: Platyhelminthes
Class: Rhabditophora
Subclass: Trepaxonemata
Infraclass: Neoophora
Orders

The monophyly of Neoophora is disputed, since some recent molecular studies indicated that the most basal order, Lecithoepitheliata, is more closely related to Polycladida, a non-neoophoran order, than to other neoophorans. This would imply that the ectolecithal condition would have evolved twice. The clade formed by all other neoophorans, excluding Lecithoepitheliata, is usually called Euneoophora.[2]

References

  1. Boll, P. K.; Rossi, I.; Amaral, S. V.; Oliveira, S. M.; Müller, E. S.; Lemos, V. S.; Leal-Zanchet, A. M. (2013). "Platyhelminthes ou apenas semelhantes a Platyhelminthes? Relações filogenéticas dos principais grupos de turbelários". Neotropical Biology and Conservation. 8 (1): 41–52. doi:10.4013/nbc.2013.81.06.
  2. Egger, B.; Lapraz, F.; Tomiczek, B.; Müller, S.; Dessimoz, C.; Girstmair, J.; Škunca, N.; Rawlinson, K. A.; Cameron, C. B.; Beli, E.; Todaro, M. A.; Gammoudi, M.; Noreña, C.; Telford, M. I. (2015). "A Transcriptomic-Phylogenomic Analysis of the Evolutionary Relationships of Flatworms". Current Biology. 25 (10): 1347–1353. doi:10.1016/j.cub.2015.03.034. PMC 4446793. PMID 25866392.


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