Notoproctus

Notoproctus is a genus of marine polychaete worms in the family Maldanidae. It is the only member of the subfamily Notoproctinae.[1][2]

Notoproctus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Annelida
Clade: Pleistoannelida
Subclass: Sedentaria
Clade: Maldanomorpha
Family: Maldanidae
Subfamily: Notoproctinae
Detinova 1982
Genus: Notoproctus
Arwidsson 1906
Type species
Notoproctus oculatus
Arwidsson 1906
Species
  • N. abyssus
  • N. godeffroyi
  • N. laevis
  • N. lineatus
  • N. oculatus
  • N. pacificus
  • N. scutiferus
  • N. sibogae

Description

Notoproctus worms are characterized by the presence of cephalic and pygidial plates, a cephalic plate with a low rim, a wide prostomium that forms a low keel, strongly curved nuchal grooves, notochaetae with long and thick capillaries, neurochaetae shaped as acicular spines or reduced uncini in the first four chaetigers (i.e. segments with chaetae), subsequent chaetigers with a row of rostrate uncini, a pygidium with a flat pygidial plate with a low rim, and an anus dorsal to the plate. They have 10 to 17 chaetigers, and some achaetous (i.e. without chaetae) segments before the pygidium.[1]

Classification

This genus contains 9 species:[1][3]

  • Notoproctus abyssus Hartman & Fauchald 1971
  • Notoproctus godeffroyi Augener 1922
  • Notoproctus laevis (Fauchald 1972)
  • Notoproctus lineatus Moore 1923
  • Notoproctus oculatus Arwidsson 1906
  • Notoproctus pacificus (Moore 1906)
  • Notoproctus scutiferus Wesenberg-Lund 1948
  • Notoproctus sibogae (Mesnil & Fauvel 1939)

References
  1. Purschke G, Böggemann M, Schmidt-Rhaesa A, Westheide W, eds. (2021). Handbook of Zoology: Annelida. Vol. 3: Pleistoannelida, Sedentaria III and Errantia I. Walter de Gruyter GmbH & Co KG. ISBN 9783110291483.
  2. Kobayashi, Genki; Goto, Ryutaro; Takano, Tsuyoshi; Kojima, Shigeaki (2018). "Molecular phylogeny of Maldanidae (Annelida): Multiple losses of tube-capping plates and evolutionary shifts in habitat depth". Molecular Phylogenetics and Evolution. 127: 332–344. doi:10.1016/j.ympev.2018.04.036. ISSN 1055-7903.
  3. Arwidsson (1906). "Notoproctus". WoRMS. World Register of Marine Species. Retrieved 10 December 2022.
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