Fecampiida

Fecampiida is an order of flatworms in the class Rhabditophora. It is a considerably recent clade, erected after molecular studies.[1]

Fecampiida
Scientific classification
Kingdom: Animalia
Phylum: Platyhelminthes
Class: Rhabditophora
Clade: Adiaphanida
Order: Fecampiida
Rohde, Luton, Baverstock & Johnson, 1994
Families

Description

The order Fecampiida, as currently defined, was erected based on molecular studies.[2] They all are parasitic organisms and are united by a similar development of the basal bodies during spermiogenesis.[3]

Classification

Three families of Fecampiida were initially classified in different flatworm orders: Urastomatidae and Genostomatidae were considered prolecithophorans, while Fecampiidae was considered a rhabdocoel. When the genus Notentera was discovered, its relationship with Fecampiidae was clear based on morphology, and both groups were united under Fecampiida.[3] Further ultrastructural studies suggested that Urastomatidae and Genostomatidae were closely related to Fecampiidae and Notenteridae, which was confirmed by molecular studies.[4]

Due to similarities in the protonephridial flame bulb, sperm and spermiogenesis, as well as the parasitic lifestyle, fecampiids were thought to be closely related to neodermatans,[3] but molecular studies revealed them to be more closely related to triclads and prolecithophorans.[4]

References
  1. Boll, Piter Kehoma; Rossi, Ilana; Amaral, Silvana Vargas do; Oliveira, Simone Machado de; Müller, Eliara Solange; Lemos, Virginia Silva; Leal-Zanchet, Ana Maria (2013). "Platyhelminthes ou apenas semelhantes a Platyhelminthes? Relações filogenéticas dos principais grupos de turbelários". Neotropical Biology and Conservation (in Portuguese). 8 (1). doi:10.4013/nbc.2013.81.06. ISSN 2236-3777.
  2. Norén, Michael; Jondelius, Ulf (2002). "The phylogenetic position of the Prolecithophora (Rhabditophora, 'Platyhelminthes')". Zoologica Scripta. 31 (4): 403–414. doi:10.1046/j.1463-6409.2002.00082.x. ISSN 0300-3256.
  3. Kornakova, Elena E.; Joffe, Boris I. (1999). "A new variant of the neodermatan-type spermiogenesis in a parasitic 'turbellarian', Notentera ivanovi (Platyhelminthes) and the origin of the Neodermata". Acta Zoologica. 80 (2): 135–152. doi:10.1046/j.1463-6395.1999.80220012.x. ISSN 0001-7272.
  4. Littlewood, D. T. J.; Rohde, K.; Bray, R. A.; Herniou, E. A. (1999). "Phylogeny of the Platyhelminthes and the evolution of parasitism". Biological Journal of the Linnean Society. 68 (1–2): 257–287. doi:10.1111/j.1095-8312.1999.tb01169.x. ISSN 0024-4066.
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