Parahololepidella

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Parahololepidella
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Annelida
Clade: Pleistoannelida
Subclass: Errantia
Order: Phyllodocida
Family: Polynoidae
Genus: Parahololepidella
Pettibone, 1969
Type species
Parahololepidella greeffi (Augener 1918) [1]

Parahololepidella is a genus of marine annelids in the family Polynoidae (scale worms). The genus contains a single species, Parahololepidella greeffi, This species is known from the east equatorial Atlantic Ocean and Cape Verde Islands at a maximum depth of 30m. [2]

Contents

Description

Species of Parahololepidella are long-bodied, with 130 or more segments and 60 or more pairs of elytra, which continue to the end of the body. The elytra are smooth and very small, leaving most of the parapodia and dorsum uncovered. The neuropodia have a sub-acicular process, and the notochaetae are more slender than neurochaetae, none of which are bidentate. Cephalic peaks are also present on the prostomium. [3]

Description of Parahololepidella greeffi

Specifically, P. greeffi has 136 segments and 67 pairs of elytra. The dorsum is a greyish-yellow with a median purple band and there are dark spots near the base of the parapodia. The lateral antennae are inserted ventrally (beneath the prostomium and median antenna), and the notochaetae are thinner than the neurochaetae. Bidentate neurochaetae are also absent. [4]

Taxonomic comments

Parahololepidella is distinguished from other scale worms by the subacicular neuropodial process and having numerous (50–60 or more pairs) of very small elytra which only cover the base of the parapodium. [2]

Biology and Ecology

P. greeffi is a commensal organism. Its host are antipatharian corals in the genus Tanacetipathes . [4]

Related Research Articles

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Australaugeneria michaelseni is a scale worm known from northern Australia and Papua New Guinea from depths of 30m or less.

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Eunoe spinicirris is a scale worm described from the Sea of Japan at depths of 30–200m.


Antipathipolyeunoa is a genus of marine annelids in the family Polynoidae. The genus contains a single species, Antipathipolyeunoa nuttingi, found in the Caribbean Sea at a depth of 91 metres.

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Bathyeliasona abyssicola is a deep-sea scale worm which occurs widely across the Pacific and Atlantic Oceans and over a wide depth range, from 4000m to 8000m.

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Eulagisca macnabi is a scale worm that occurs in the Antarctic Ocean, the Amundsen Sea and off the South Orkney Islands at depths of about 300 to 1500m.

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Yodanoe is a genus of marine polychaete worms belonging to the family Polynoidae, the scaleworms. Yodanoe contains a single species, Yodanoe desbruyeresi which is known from the Clarion-Clipperton Fracture Zone in the equatorial East Pacific Ocean at a depth of almost 5000 m.

Gattyana nutti is a scale worm known from the North Atlantic Ocean off the coast of North America at depths down to about 120 m.

Gattyana treadwelli is a scale worm known from the north-west Pacific and Arctic Oceans from depths down to about 30 m.

References

  1. Read, G.; Fauchald, K. (Ed.) (2020). World Polychaeta database. Parahololepidella Pettibone, 1969. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=846000
  2. 1 2 Pettibone, Marian H. (1969). The genera Polyeunoa McIntosh, Hololepidella Willey, and three new genera (Polychaeta, Polynoidae). Proceedings of the Biological Society of Washington. 82: 43-62., available online at http://biodiversitylibrary.org/page/34595050
  3. Fauchald, K.; Wilson, R.S. (2003). "Polynoidae (Polychaeta)-A DELTA database of genera, and Australian species". In R.S. Wilson; P.A. Hutchings; C. J. Glasby (eds.). Polychaetes: An Interactive Identification Guide. Melbourne: CSIRO Publishing.
  4. 1 2 Britayev TA, Gil J, Altuna Á, Calvo M, Martín D (2014) New symbiotic associations involving polynoids (Polychaeta, Polynoidae) from Atlantic waters, with redescriptions of Parahololepidella greeffi (Augener, 1918) and Gorgoniapolynoe caeciliae (Fauvel, 1913). Memoirs of Museum Victoria 71: 27–43. https://doi.org/10.24199/j.mmv.2014.71.04.